550 XP G - Saw HUSQVARNA - Free user manual and instructions

USER MANUAL 550 XP G HUSQVARNA

545 Mark II, 545G Mark II, 550 XP® Mark II, 550 XP® G Mark II

EN Operator's manual 2-39

Transportation and storage....33

Technical data.... 33

Accessories.... 34

Warranty....37

Introduction

Intended use

This product is intended for sawing in wood.

Note: National regulations can set limit to the operation of the product.

Product description

The Husqvarna 545 Mark II, 545G Mark II, 550 XP Mark II, 550 XPG Mark II are chainsaw models with a combustion engine.

Work is constantly in progress to increase your safety and efficiency during operation. Speak to your servicing dealer for more information.

Product overview

Exploded view diagram of a chain drive with numbered parts and exploded view of internal components

1. Cylinder cover
2. Spark plug
3. Spark plug cap
4. Air filter

5. Vibration damping system, 3 units

6. Throttle trigger lockout

7. Rear handle
8. Information and warning decal
9. Throttle trigger

10. Start/stop switch

11. Fuel level window

12. Fuel tank
13. Air purge bulb
14. Starter rope handle
15. Starter housing
16. Chain oil tank
17. Muffler
18. Chain brake and front hand guard
19. Front handle
20. Switch for heated handles (545G Mark II, 550 XPG Mark II)
21. Right hand guard
22. Clutch cover
23. Clutch drum
24. Oil pump adjustment screw
25. Chain tensioning screw
26. Chain catcher
27. Spiked bumper
28. Saw chain
29. Guide bar
30. Bar tip sprocket
31. Brake band
32. Guide bar cover
33. Operator's manual
34. Combination wrench

Symbols on the product

Stop.

Be careful and use the product correctly. This product can cause serious injury or death to the operator or others.

Read the operator's manual carefully and make sure that you understand the instructions before you use this product.

Always wear approved protective helmet, approved hearing protection and eye protection.

Use 2 hands to operate the product.

Do not operate the product with one hand only.

Do not let the guide bar tip touch an object.

Warning! Kickback can occur when the guide bar tip touches an object. A kickback causes a lightning fast reverse reaction that throws the guide bar up and in the direction of the operator. Can cause serious injury.

Chain brake, engaged (right). Chain brake, disengaged (left).

Choke.

Air purge.

Adjustment of the oil pump.

Fuel.

Chain oil.

If your product has this symbol it has heated handles.

yyyyMMddxxxx The rating plate shows se-

rial number. yyyy is the production year and ww is the production week.

Recommended cutting equipment in this example: Guide bar length 16 in, maximum nose radius 12 Teeth and chain type Husqvarna H25.

Computed kickback bar stopping angle without actuated chainbrake, CKA wob.

Computed kickback bar stopping angle with actuated chainbrake, CKA wb.

Note: Other symbols/decals on the product refer to certification requirements for some markets.

EPA III

EMISSION CONTROL INFORMATION Husqvarna® HUSQVARNA AB HUSKVARNA SWEDEN THIS ENGINE MEETS U.S. EPA EXH/EVP REGS FOR SORE. REFER TO OPERATOR'S MANUAL FOR MAINTENANCE SPECIFICATIONS AND ADJUSTMENTS. EMISSIONS COMPLIANCE PERIOD: HRS

The Emissions Compliance Period referred to on the Emission Compliance label indicates the number of operating hours for which the engine has been shown to

meet Federal emissions requirement. Maintenance, replacement or repair of the emission control devices and system may be performed by any nonroad engine repair establishment or individual.

California Proposition 65

WARNING! The engine exhaust from this product contains chemicals known to the State of California to cause cancer, birth defects or other reproductive harm.

Safety

Safety definitions

Warnings, cautions and notes are used to point out specially important parts of the manual.

WARNING: Used if there is a risk of injury or death for the operator or bystanders if the instructions in the manual are not obeyed.

CAUTION: Used if there is a risk of damage to the product, other materials or the adjacent area if the instructions in the manual are not obeyed.

Note: Used to give more information that is necessary in a given situation.

General safety instructions

WARNING: Read the warning instructions that follow before you use the product.

• A chainsaw is a dangerous tool if used carelessly or incorrectly and can cause serious injury or death. It is very important that you read and understand the contents of this operator's manual.
• Under no circumstances may the design of the product be modified without the permission of the manufacturer. Do not use a product that appears to have been modified by others and only use accessories recommended for this product. Non-authorized modifications and/or accessories can result in serious personal injury or the death of the operator or others. Your warranty may not cover

damage or liability caused by the use of non- authorized accessories or replacement parts.

• The inside of the muffler contains chemicals that may be carcinogenic. Avoid contact with these elements in the event of a damaged muffler.
• Long term inhalation of the engine's exhaust fumes, chain oil mist and sawdust can represent a health risk.
• This product produces an electromagnetic field during operation. This field may under some circumstances interfere with active or passive medical implants. To reduce the risk of serious or fatal injury, we recommend persons with medical implants to consult their physician and the medical implant manufacturer before operating this product.
• The information in this operator's manual is never a substitute for professional skills and experience. If you get into a situation where you feel unsafe, stop and seek expert advice. Contact your servicing dealer or an experienced chainsaw user. Do not attempt any task that you feel unsure of!

Safety instructions for operation

WARNING: Read the warning instructions that follow before you use the product.

• Before using the chainsaw you must understand the effects of kickback and how to avoid them. Refer to Kickback information on page 12 for instructions.
• Never use a product that is faulty.
• Never use a product with visible damage to the spark plug cap and ignition cable. A risk of sparking arises, which can cause a fire.
• Never use the product if you are fatigued, while under the influence of alcohol or drugs, medication

or anything that could affect your vision, alertness, coordination or judgment.

• Do not use the product in bad weather such as dense fog, heavy rain, strong wind, intense cold, etcetera. Working in bad weather is tiring and often brings added risks, such as icy ground, unpredictable felling direction, etcetera.
• Never start a product unless the guide bar, saw chain and all covers are fitted correctly. Refer to Assembly on page 9 for instructions. Without a bar and saw chain attached to the product the clutch can come loose and cause serious injury.

Safety warning symbol showing a crossed-out device with smoke and a cigarette, indicating no smoking or disinfection.

• Never start the product indoors. Exhaust fumes can be dangerous if inhaled.
  • The exhaust fumes from the engine are hot and can contain sparks, which can start a fire. Never start the product near flammable material!
• Observe your surroundings and make sure that there is no risk of people or animals coming in contact with or affect your control of the product.
• Never allow children to use or be in the vicinity of the product. As the product is equipped with a spring-loaded start/stop switch and can be started by low speed and force on the starter handle, even small children under some circumstances can produce the force necessary to start the product. This can mean a risk of serious personal injury. Therefore remove the spark plug cap when the product is not under close supervision.
• You must have a steady stance in order to have full control of the product. Never work standing on a ladder, in a tree or where you do not have a firm ground to stand on.

Prohibition sign showing a worker on a ladder holding tools, enclosed in a circle (no text or symbols)

- Lack of concentration can lead to kickback if the kickback zone of the bar accidentally touches a branch, nearby tree or some other object.

Illustration of a person using a saw to cut wood or metal, with a curved arrow indicating the process (no text or symbols present)

• Never use the product by holding it with one hand. This product is not safely controlled with one hand.
  • Always hold the product with both hands. The right hand should be on the rear handle, and the left hand on the front handle. All people, whether right or left handed, should use this grip. Use a firm grip with thumbs and fingers encircling the handles. This grip minimizes the risk of kickback and lets you keep the product under control. Do not let go of the handles!

Illustration of a mechanical device with two hands operating it, no text or symbols present

- Never use the product above shoulder height.

Prohibition sign showing a person cutting tree with a diagonal line, indicating no intervention or restriction.

• Do not use the product in a situation where you cannot call for help in case of an accident.
• Before moving your product, switch off the engine and lock the saw chain using the chain brake. Carry the product with the guide bar and saw chain pointing backwards. Fit a transportation guard to the guide bar before transporting the product or carrying it for any distance.

• When you put the product on the ground, lock the saw chain using the chain brake and ensure you have a constant view of the product. Switch the engine off before leaving your product for any length of time.
  • Sometimes chips get stuck in the clutch cover causing the saw chain to jam. Always stop the engine before cleaning.

• Running an engine in a confined or badly ventilated area can result in death due to carbon monoxide poisoning.

• Use the chain brake as a parking brake when you start the product and when you move short distances. Always carry the product in the front handle. This decreases the risk that you or a person near you get hit by the saw chain.
• It is not possible to cover every conceivable situation you can face when using this product. Always exercise care and use your common sense. Avoid all situations which you consider to be beyond your capability. If you still feel uncertain about operating procedures after reading these instructions, you should consult an expert before continuing. Do not hesitate to contact your dealer or Husqvarna if you have any questions about the use of the product. We will willingly be of service and provide you with advice as well as help you to use your product both efficiently and safely. Attend a training course in chainsaw usage if possible. Your dealer, forestry school or your library can provide information about which training materials and courses are available.

Diagram showing a person falling off a tree with a diagonal line indicating no obstruction or barrier

• When using this product, a fire extinguisher should be available.
• Keep handles dry, clean and free from oil.
• Beware of carbon monoxide poisoning. Operate the product in a well ventilated area only.
• Do not attempt a pruning or limbing operation in a standing tree unless specifically trained to do so.

Personal protective equipment

WARNING: Read the warning instructions that follow before you use the product.

Illustration showing a person wearing a full-body mask, first aid kit, fire extinguisher, and shovetted tool.

- Most chainsaw accidents occur when the saw chain touches the operator. You must use approved personal protective equipment during operation.

Personal protective equipment does not give you full protection from injuries but it decreases the degree of injury if an accident occurs. Speak to your servicing dealer for recommendations about which equipment to use.

- Your clothing must be close-fitting but not limit your movements. Regularly do a check of the condition of the personal protective equipment.

- Use an approved protective helmet.

- Use approved hearing protection. Long-term exposure to noise can result in permanent damage to the hearing.

- Use protective glasses or a face visor to decrease the risk of injury from thrown objects. The product can throw objects, such as wood chips, small pieces of wood and more, at large force. This can result in serious injury, especially to the eyes.

- Use gloves with saw protection.

- Use pants with saw protection.

- Use boots with saw protection, steel toe-cap and non-slip sole.

• Always have a first-aid kit with you.

- Risk of sparks. Keep fire extinguishing tools and a shovel near to prevent forest fires.

Safety devices on the product

WARNING: Read the warning instructions that follow before you use the product.

• Do not use a product with defective safety devices.
• Do a check of the safety devices regularly. Refer to Maintenance and checks of the safety devices on the product on page 23.
• If the safety devices are defective, speak to your Husqvarna servicing dealer.

Chain brake and front hand guard

Your product has a chain brake that stops the saw chain if you get a kickback. The chain brake decreases the risk of accidents, but only you can prevent them.

The chain brake engages (A) manually by your left hand or automatically by the inertia release mechanism. Push the front hand guard (B) forward to engage the chain brake manually.

A B STOP

Pull the front hand guard rearward to disengage the chain brake.

Line drawing of a car hood with airflow direction arrow (no text or symbols)

Throttle trigger lockout

The throttle trigger lockout prevents accidental operation of the throttle trigger. If you put your hand around the handle and press the throttle trigger lockout (A), it releases the throttle trigger (B). If you release the handle, the throttle trigger and the throttle trigger lockout move back to their initial positions. This function locks the throttle trigger at idle speed.

Diagram of a chainocenter with labeled parts A and B, showing motion arrows (no text or symbols beyond labels)

Chain catcher

The chain catcher catches the saw chain if it breaks or derails. Correct saw chain tension and correctly applied maintenance on the saw chain and guide bar, decrease the risk of accidents.

Technical line drawing of a hairpin tool and its magnified view (no text or symbols)

Right hand guard

The right hand guard is a protection for your hand on the rear handle. The right hand guard gives you protection if the saw chain breaks or derails. The right hand guard also gives you protection from branches or twigs.

Technical line drawing of a mechanical component or bracket (no text or symbols)

Vibration damping system

The vibration damping system decreases vibration in the handles. Vibration damping units operate as a

separation between the product body and the handle unit.

Refer to Product overview on page 2 for information about where the vibration damping system is on your product.

Start/stop switch

Use the start/stop switch to stop the engine.

Line drawing of a chainsaw with an inset showing a person holding a box (no text or symbols present)

WARNING: The start/stop switch automatically goes back to start position. To prevent accidental start, remove the spark plug cap from the spark plug when you assemble or do maintenance on the product.

Illustration of a medical device with a bulb inserted into a stack of tissue (no text or symbols)

Muffler

WARNING: The muffler becomes very hot during/after operation and at idle speed. There is a risk of fire, especially when you operate the product near flammable materials and/or fumes.

WARNING: Do not operate a product without a muffler or with a defective muffler. A defective muffler can increase the noise level and the risk of fire. Keep fire extinguishing tools near. Do not use a product without, or with a broken, spark arrestor mesh if you must have a spark arrestor mesh in your area.

The muffler keeps the noise levels to a minimum and points the exhaust fumes away from the operator. In

areas with a hot, dry weather there is a high risk of fire. Obey local regulations and maintenance instructions.

Technical line drawing of a mechanical device with mounting holes and internal components (no text or symbols)

Fuel safety

WARNING: Read the warning instructions that follow before you use the product.

• Make sure there is plenty of ventilation when refuelling or mixing fuel (petrol and two-stroke oil).

- Fuel and fuel vapour are highly flammable and can cause serious injury when inhaled or allowed to come in contact with the skin. For this reason observe caution when handling fuel and make sure there is adequate ventilation.

• Take care when handling fuel and chain oil. Be aware of the risks of fire, explosion and those associated with inhalation.

- Do not smoke and do not place any hot objects in the vicinity of fuel.

• Always stop the engine and let it cool for a few minutes before refuelling.

- When refuelling, open the fuel cap slowly so that any excess pressure is released gently.

- Tighten the fuel cap carefully after refuelling.

- Never refuel the machine while the engine is running.

• Always move the product at least 3 m (10 ft) away from the refuelling area and fuel source before starting.

Min. 3 m (10 ft)

After refuelling, there are some situations where you must never start the product:

- If you have spilled fuel or chain oil on the product. Wipe off the spillage and allow remaining fuel to evaporate.

- If you have spilled fuel on yourself or on your clothes. Change your clothes and wash any part of your body that has come in contact with fuel. Use soap and water.

- If the product leaks fuel. Regularly do a check for leaks from the fuel tank, fuel cap and fuel lines.

Safety instructions for maintenance

WARNING: Read the warning instructions that follow before you do maintenance on the product.

- Do only the maintenance and servicing given in this operator's manual. Let professional servicing personnel do all other servicing and repairs.

- Regularly do the safety checks, maintenance and service instructions given in this manual. Regular maintenance increases the life of the product and decreases the risk of accidents. Refer to Maintenance on page 21 for instructions.

- If the safety checks in this operator's manual is not approved after you do maintenance, speak to your servicing dealer. We guarantee that there are professional repairs and servicing available for your product.

Safety instructions for the cutting equipment

WARNING: Read the warning instructions that follow before you use the product.

- Only use approved guide bar/saw chain combinations and filing equipment. Refer to Filing equipment and filing angles on page 36 for instructions.

• Use protective gloves when you use or do maintenance on the saw chain. A saw chain that does not move can also cause injuries.
• Keep the cutting teeth correctly sharpened. Obey the instructions and use the recommended file gauge. A saw chain that is damaged or incorrectly sharpened increases the risk of accidents.

Line drawing of a VR headset with a starburst effect (no text or symbols)

- Keep the correct depth gauge setting. Obey the instructions and use the recommended depth gauge setting. Too large depth gauge setting increases the risk of kickback.

Pure technical line drawing of a mechanical component with no text or symbols

• Make sure that the saw chain has the correct tension. If the saw chain is not tight against the guide

bar, the saw chain can derail. An incorrect saw chain tension increases wear on the guide bar, saw chain and chain drive sprocket. Refer to To adjust the tension of the saw chain on page 28.

Diagram showing a prohibition symbol over layered structures with numerical labels and shaded regions

- Do maintenance on the cutting equipment regularly and keep it correctly lubricated. If the saw chain is not correctly lubricated, the risk of wear on the guide bar, saw chain and chain drive sprocket increases.

Simple line drawing of a water droplet falling into a mechanical component (no text or symbols)

Assembly

Introduction

WARNING: Read and understand the safety chapter before you assemble the product.

To assemble the guide bar and saw chain

1. Move the front hand guard rearward to disengage the chain brake.

2. Remove the bar nuts and the clutch cover.

3. Move the front hand guard rearward to disengage the chain brake.

4. Remove the bar nuts and the clutch cover.

Note: If the clutch cover is not easy to remove, tighten the bar nut, engage the chain brake and release. A click is heard if it is released correctly.

1. Assemble the guide bar onto the bar bolts. Move the guide bar to its most rear position.

2. Install the saw chain correctly around the drive sprocket and put it in the groove on the guide bar.

3. Assemble the guide bar onto the bar bolts. Move the guide bar to its most rear position.

4. Install the saw chain correctly around the drive sprocket and put it in the groove on the guide bar.

WARNING: Always use protective gloves when you assemble the saw chain.

1. Make sure that the edges of the cutters point forward on the top edge of the guide bar.

Technical diagram showing mechanical assembly with gear and gear meshing, annotated with directional arrows and a magnified inset of a component.

1. Align the hole in the guide bar with the chain adjuster pin and install the clutch cover.

Technical line drawing of a vehicle chassis with mechanical components and a curved arrow indicating motion (no text or symbols)

1. Tighten the bar nuts finger tight.

2. Tighten the saw chain. Refer to To adjust the tension of the saw chain on page 28 for instructions.

3. Tighten the bar nuts.

Note: Some models have only one bar nut.

Operation

Introduction

WARNING: Read and understand the safety chapter before you use the product.

To do a function check before you use the product

1. Make sure that the chain brake operates correctly and that it is not damaged.
2. Make sure that the right hand guard is not damaged.
3. Make sure that the throttle lockout operates correctly and that it is not damaged.
4. Make sure that the start/stop switch operates correctly and that it is not damaged.
5. Make sure that there is no oil on the handles.
6. Make sure that the vibration damping system operates correctly and that it is not damaged.
7. Make sure that the muffler is correctly attached and that it is not damaged.
8. Make sure that all parts of the product are correctly attached and not damaged or missing.

9. Make sure that the chain catcher is correctly attached.

10. Do a check of the saw chain tension.

6,8 1 2 3 4 5 5 7 9 10

Fuel

This product has a two-stroke engine.

CAUTION: Incorrect type of fuel can result in engine damage. Use a mixture of gasoline and two-stroke oil.

Premixed fuel

- Use Husqvarna premixed alkylate fuel for best performance and extension of the engine life. This fuel contains less harmful chemicals compared to regular fuel, which decreases harmful exhaust fumes. The quantity of remains after combustion is lower with this fuel, which keeps the components of the engine more clean.

To mix fuel

Gasoline

- Use good quality unleaded gasoline with a maximum of 10% ethanol contents.

CAUTION: Do not use gasoline with an octane grade less than 90 RON/87 AKI. Use of a lower octane grade can cause engine knocking, which causes engine damages.

Two-stroke oil

• For best results and performance use Husqvarna two-stroke oil.
• If Husqvarna two-stroke oil is not available, use a two-stroke oil of good quality for air-cooled engines. Speak to your servicing dealer to select the correct oil.

CAUTION: Do not use two-stroke oil for water-cooled outboard engines, also referred to as outboard oil. Do not use oil for four-stroke engines.

To mix gasoline and two-stroke oil

Gasoline, liter Two-stroke oil,	liter
	2% (50:1)
5 0.10
10 0.20
15 0.30
20 0.40
US gallon US fl. oz.
1 2 12
2 1/2 6 12
5 12 78

CAUTION: Small errors can influence the ratio of the mixture drastically when you mix small quantities of fuel. Measure the quantity of oil carefully and make sure that you get the correct mixture.

Diagram illustrating fuel injection process with fuel can, fuel drop, and no-drawn symbols indicating discharge or disposal.

Illustration of a person in historical attire holding an object, no text or symbols present

1. Fill half the quantity of gasoline in a clean container for fuel.
2. Add the full quantity of oil.
3. Shake the fuel mixture.
4. Add the remaining quantity of gasoline to the container.
5. Carefully shake the fuel mixture.

CAUTION: Do not mix fuel for more than 1 month at a time.

To fill the fuel tank

WARNING: Obey the procedure that follows for your safety.

1. Stop the engine and let the engine become cool.
2. Clean the area around the fuel tank cap.

Simple black-and-white icon showing a droplet and a fuel pump with a plus sign (no text or symbols)

1. Shake the container and make sure that the fuel is fully mixed.
2. Remove the fuel tank cap slowly to release the pressure.
3. Fill the fuel tank.

CAUTION: Make sure that there is not too much fuel in the fuel tank. The fuel expands when it becomes hot.

1. Tighten the fuel tank cap carefully.
2. Clean fuel spillage on and around the product.
3. Move the product 3 m/10 ft or more away from the refueling area and fuel source before you start the engine.

Note: To see where the fuel tank is on your product, refer to Product overview on page 2.

To do a run-in

- During the first 10 hours of operation, do not apply full throttle without load for extended periods.

To use the correct chain oil

WARNING: Do not use waste oil, which can cause injury to you and the environment. Waste oil also causes damage to the oil pump, the guide bar and the saw chain.

WARNING: The saw chain can break if the lubrication of the cutting equipment is not sufficient. Risk of serious injury or death to the operator.

WARNING: This product has a function that lets the fuel run out before the chain oil. Use the correct chain oil for this function to operate correctly. Speak to your servicing dealer when you select your chain oil.

• Use Husqvarna chain oil for maximum saw chain life and to prevent negative effects on the environment. If Husqvarna chain oil is not available, we recommend you to use a standard chain oil.
• Use a chain oil with good adherence to the saw chain.
• Use a chain oil with correct viscosity range that agrees with the air temperature.

CAUTION: If the oil is too thin, it runs out before the fuel. In temperatures below 0°C/32°F some chain oils become too thick, which can cause damage to the oil pump components.

• Use the recommended cutting equipment. Refer to Accessories on page 34.
• Remove the cap to the chain oil tank.
• Fill the chain oil tank with chain oil.
• Attach the cap carefully.

Abstract black silhouette of a droplet above a stylized mask (no text or symbols)

Note: To see where the chain oil tank is on your product, refer to Product overview on page 2.

Kickback information

WARNING: A kickback can cause serious injury or death to the operator or others. To decrease the risk you must know the causes of kickback and how to prevent them.

A kickback occurs when the kickback zone of the guide bar touches an object. A kickback can occur suddenly and with large force, which throws the product in the direction of the operator.

Diagram showing a person in a triangular hazard symbol with an arrow indicating direction, alongside a chain of chains.

Kickback always occurs in the cutting plane of the guide bar. Usually, the product is thrown against the operator but can also move in a different direction. It is how you

use the product when the kickback occurs that causes the direction of the movement.

Illustration of a person in protective gear using a tool to lift a rolled paper or cable (no text or symbols)

A smaller bar tip radius decreases the force of the kickback.

Use a low kickback saw chain to decrease the effects of kickback. Do not let the kickback zone touch an object.

WARNING: No saw chain fully prevents kickback. Always obey the instructions.

Common questions about kickback

- Will the hand always engage the chain brake during a kickback?

No. It is necessary to use some force to push the front hand guard forward. If you do not use the force necessary, the chain brake will not be engaged. You must also hold the handles of the product stable with two hands during work. If a kickback occurs, it is possible that the chain brake does not stop the saw chain before it touches you. There are also some positions in which your hand can not touch the front hand guard to engage the chain brake.

- Will the inertia release mechanism always engage the chain brake during kickback?

No. First, the chain brake must operate correctly. Refer to Maintenance and checks of the safety devices on the product on page 23 for instructions about how to do a check of the chain brake. We recommend you to do this each time before you use the product. Second, the force of the kickback must be large to engage the chain brake. If the chain brake is too sensitive, it can engage during rough operation.

- Will the chain brake always protect me from injury during a kickback?

No. The chain brake must operate correctly to give protection. The chain brake must also be engaged during a kickback to stop the saw chain. If you are near the guide bar, it is possible that the chain brake does not have time to stop the saw chain before it hits you.

WARNING: Only you and the correct working technique can prevent kickbacks.

To start the product

To prepare to start with a cold engine

WARNING: The chain brake must be engaged when the product is started to decrease the risk of injury.

1. Move the front hand guard forward to engage the chain brake.

Diagram of a manual tool emitting a curved arrow, with no text or symbols present

1. Pull the start/stop switch (A) out and up to set it in choke position.

2. Press the air purge bulb (B) about 6 times or until fuel starts to fill the bulb. It is not necessary to fill the air purge bulb fully.

(B) (A)

1. Continue to To start the product on page 13 for more instructions.

To prepare start with a warm engine

WARNING: The chain brake must be engaged when the product is started to decrease the risk of injury.

1. Move the front hand guard forward to engage the chain brake.

Diagram of a car's side profile showing airflow direction (no text or symbols)

1. Pull the start/stop switch (A) out and up to set it in choke position.

2. Press the air purge bulb (B) about 6 times or until fuel starts to fill the bulb. It is not necessary to fill the air purge bulb fully.

3. Press down the start/stop switch (C) to set start throttle setting.

(A)

(B) (C)

1. Continue to To start the product on page 13 for more instructions.

To start the product

WARNING: You must keep your feet in a stable position when you start the product.

WARNING: If the saw chain rotates at idle speed, speak to your servicing dealer and do not use the product.

1. Put the product on the ground.
2. Put your left hand on the front handle.
3. Put your right foot into the footgrip on the rear handle.
4. Pull the starter rope handle slowly with your right hand until you feel resistance.

WARNING: Do not twist the starter rope around your hand.

1. Pull the starter rope handle quickly and with force.

Illustration of a person using a chainsaw to cut the chain (no text or symbols present)

CAUTION: Do not pull the starter rope to full extension and do not let go of the starter rope handle. This can cause damage to the product.

a) If you start your product with a cold engine, pull the starter rope handle until the engine fires.

Note: You can identify when the engine fires through a "puff" sound.

b) Disengage the choke.

1. Pull the starter rope handle until the engine starts.
2. Quickly disengage the throttle trigger lockout to set the product to idle speed.

Line drawing of a chain-linking device with arrows indicating motion direction (no text or symbols)

1. Move the front hand guard rearward to disengage the chain brake.

Line drawing of a manual chain saw with a curved blade and arrow indicating motion (no text or symbols)

1. Use the product.

To stop the product

1. Push the start/stop switch down to stop the engine.

Line drawing of a chainsaw with an inset showing a person in a gear (no text or symbols)

Pull stroke and push stroke

You can cut through wood with the product in 2 different positions.

• To cut on the pull stroke is when you cut with the bottom of the guide bar. The saw chain pulls through the tree when you cut. In this position you have

better control of the product and the position of the kickback zone.

Illustration of a hand using a chainsaw to cut a circular saw (no text or symbols present)

• To cut on the push stroke is when you cut with the top of the guide bar. The saw chain pushes the product in the direction of the operator.

Line drawing of a manual saw cutting process with motion arrows indicating cycle (no text or symbols)

WARNING: If the saw chain is caught in the trunk, the product can be pushed at you. Hold the product tightly and make sure that the kickback zone of the guide bar does not touch the tree and causes a kickback.

Diagram illustrating a hazard warning mechanism with a chainsaw and chainsill, showing hazard symbol and safety instructions.

To use the cutting technique

WARNING: Use full throttle when you cut and decrease to idle speed after each cut.

CAUTION: Engine damage can occur if the engine runs for too long at full throttle without load.

1. Put the trunk on a saw horse or runners.

Illustration of two workers handling stacked logs, one standing and one leaning over (no text or symbols)

WARNING: Do not cut trunks in a pile. That increases the risk of kickback and can result in serious injury or death.

1. Remove the cut pieces from the cutting area.

WARNING: Cut pieces in the cutting area increase the risk of kickback and that you can not keep your balance.

To use the spiked bumper

1. Push the spiked bumper into the trunk of the tree.
2. Apply full throttle and rotate the product. Keep the spiked bumper against the trunk. This procedure makes it easier to apply the force necessary to cut through the trunk.

Simple line drawing of a diagonal tool cutting through a circular hole, with no text or symbols present.

To cut a trunk on the ground

1. Cut through the trunk on the pull stroke. Keep full throttle but be prepared for sudden accidents.

Safety warning illustration showing a chainsaw crushing a gear with warning symbol and downward arrow

WARNING: Make sure that the saw chain does not touch the ground when you complete the kerf.

1. Cut approximately 23 through the trunk and then stop. Turn the trunk and cut from the opposite side.

Line drawing of a chainsaw with a downward arrow indicating motion (no text or symbols)

To cut a trunk that has support on one end

WARNING: Make sure that the trunk does not break during cutting. Obey the instructions below.

Illustration of a landslide with a lightning bolt and warning symbol (no text or labels)

1. Cut on the push stroke approximately 13 through the trunk.
2. Cut through the trunk on the pull stroke until the two kerfs touch.

Line drawing of a manual cutting tool with a downward arrow indicating compression (no text or symbols)

1.

To cut a trunk that has support on two ends

WARNING: Make sure that the saw chain does not get caught in the trunk during cutting. Obey the instructions below.

Illustration of a car with a padlock and warning symbol (no text or labels)

1. Cut on the pull stroke approximately 13 through the trunk.

2. Cut through the remaining part of the trunk on the push stroke to complete the cut.

Diagram showing a chain saw tool with three labeled parts: top view, middle view, and bottom view.

WARNING: Stop the engine if the saw chain gets caught in the trunk. Use a lever to open up the kerf and remove the product. Do not try to pull the product out by hand. This can result in injury when the product suddenly breaks free.

To use the limbing technique

Note: For thick branches, use the cutting technique. Refer to To use the cutting technique on page 14.

WARNING: There is a high accident risk when you use the limbing technique. Refer to Kickback information on page 12 for instructions how to prevent kickback.

WARNING: Cut limbs one by one. Be careful when you remove small limbs and do not cut bushes or many small limbs at the same time. Small limbs can get caught in the saw chain and prevent safe operation of the product.

Note: Cut the limbs piece by piece if it is necessary.

1 2 3

1. Remove the limbs on the right side of the trunk. a) Keep the guide bar on the right side of the trunk and keep the body of the product against the trunk.

b) Select the applicable cutting technique for the tension in the branch.

Illustration of a hand using a cable to lift a car, showing the angle and motion direction (no text or symbols)

WARNING: If you are not sure about how to cut the branch, speak to a professional chainsaw operator before you continue.

1. Remove the limbs on the top of the trunk.

a) Keep the product on the trunk and let the guide bar move along the trunk.
b) Cut on the push stroke.

Illustration of a hand using a power saw to cut tree bark, with an arrow indicating the process (no text or symbols present)

1. Remove the limbs on the left side of the trunk.

a) Select the applicable cutting technique for the tension in the branch.

Illustration of a hand using a tool to cut tree bark with a black arrow indicating the direction (no text or symbols present)

WARNING: If you are not sure about how to cut the branch, speak to a professional chainsaw operator before you continue.

Refer to To cut trees and branches that are in tension on page 20 for instructions on how to cut branches that are in tension.

To use the tree felling technique

WARNING: You must have experience to fell a tree. If possible, engage in a training course in chainsaw operation. Speak to an operator with experience for more knowledge.

To keep a safe distance

1. Make sure that persons around you keep a safe distance at a minimum of 2 1/2 tree lengths.

graph TD
    A["Forest"] --> B["Person with Circle"]
    B --> C["Tree"]
    style A fill:#f9f,stroke:#333
    style C fill:#bbf,stroke:#333

1. Make sure that no person is in the risk zone before or during felling.

Illustration of a person using a tree spray gun to shoot logs in a forest (no text or symbols)

To calculate the felling direction

1. Examine in which direction it is necessary for the tree to fall. The goal is to fell it in a position where you can limb and cut the trunk easily. It is also important that you are stable on your feet and can move about safely.

WARNING: If it is dangerous or not possible to fell the tree in its natural direction, fell the tree in a different direction.

1. Examine the natural fall direction of the tree. For example the tilt and bend of the tree, wind direction, the location of the branches and weight of snow.

2. Examine if there are obstacles, for example other trees, power lines, roads and/or buildings around.

3. Look for signs of damage and rot in the stem.

WARNING: Rot in the stem can mean a risk that the tree falls before you complete the cutting.

1. Make sure the tree has no damaged or dead branches that can break off and hit you during felling.

2. Do not let the tree fall onto a different standing tree. It is dangerous to remove a caught tree and there is a high accident risk. Refer to To free a trapped tree on page 19.

Diagram of a fire safety signpost with smoke and fire, showing no text or symbols on the sign itself

WARNING: During critical felling operations, lift your hearing protection immediately when the sawing is

complete. It is important that you hear sounds and warning signals.

To clear the trunk and prepare your path of retreat

Cut off all branches from your shoulder height and down.

1. Cut on the pull stroke from the top down. Make sure that the tree is between you and the product.

Illustration of a person using a saw to cut a tree trunk with arrows indicating flow or pressure (no text or symbols)

1. Remove undergrowth from the work area around the tree. Remove all cut off material from the work area.
2. Do a check of the area for obstacles such as stones, branches and holes. You must have a clear path of retreat when the tree starts to fall. Your path of retreat must be approximately 135 degrees away from the felling direction.
3. The danger zone
4. The path of retreat
5. The felling direction

graph TD
    A["1"] --> B["2"]
    B --> C["3"]
    C --> A
    style A fill:#f9f,stroke:#333
    style B fill:#bbf,stroke:#333
    style C fill:#bfb,stroke:#333

To fell a tree

Husqvarna recommends you to make the directional cuts and then use the safe corner method when you fell a tree. The safe corner method helps you to make a correct felling hinge and control the felling direction.

WARNING: Do not fell trees with a diameter that is more than two times larger than the guide bar length. For this, you must have special training.

The felling hinge

The most important procedure during tree felling is to make the correct felling hinge. With a correct felling hinge, you control the felling direction and make sure that the felling procedure is safe.

The thickness of the felling hinge must be equal and a minimum of 10% of the tree diameter.

WARNING: If the felling hinge is incorrect or too thin, you have no control of the felling direction.

Diagram of concentric circular layers with a vertical bar and directional arrows, no text or symbols present

To make the directional cuts

1. Make the directional cuts 14 of the diameter of the tree. Make a 45^-70^ angle between the top directional cut and bottom directional cut.

45°-70°

a) Make the top directional cut. Align the felling direction mark (1) of the product with the felling direction of the tree (2). Stay behind the product and keep the tree on your left side. Cut with a pull stroke.
b) Make the bottom directional cut. Make sure that the end of the bottom directional cut is at the same point as the end of the top directional cut.

Diagram illustrating a manual tree cutting process with labeled steps 1 and 2, showing tool path and leaf removal steps.

1. Make sure that the bottom directional cut is horizontal and at a 90^ angle to the felling direction.

To use the safe corner method

The felling cut must be made slightly above the directional cut.

Diagram showing a tree trunk with a horizontal line and an arrow indicating direction, no text or symbols present.

WARNING: Be careful when you cut with the guide bar tip. Start to cut with the lower section of the guide bar tip as you make a bore cut into the trunk.

Simple line drawing of a mechanical tool or tool with no text, numbers, or symbols

1. If the usable cutting length is longer than the tree diameter, do these steps (a-d).

a) Make a bore cut straight into the trunk to complete the felling hinge width.

Simple line drawing of a mechanical component or tool with no text or symbols

b) Cut on the pull stroke until 13 of the trunk is left.
c) Pull the guide bar 5-10 cm/2-4 in rearward.
d) Cut through the remaining of the trunk to complete a safe corner that is 5-10 cm/2-4 in wide.

Cross-sectional diagram of a mechanical component with internal layered structure and a curved arrow indicating motion (no text or labels)

1. If the usable cutting length is shorter than the tree diameter, do these steps (a-d).

a) Make a bore cut straight into the trunk. The bore cut must extend 3/5 of the tree diameter.

b) Cut on the pull stroke through the remaining trunk.

Cross-sectional diagram of a mechanical or electrical component with layered structure and internal flow arrows (no text or symbols)

c) Cut straight into the trunk from the other side of the tree to complete the felling hinge.
d) Cut on the push stroke, until 13 of the trunk is left, to complete the safe corner.

Technical diagram of a mechanical component with internal structure and directional arrow (no text or labels)

1. Put a wedge in the kerf straight from behind.

Diagram illustrating a mechanical or structural change between two components, showing a circular component and a triangular structure with arrows indicating motion (no text or symbols present)

1. Cut off the corner to make the tree fall.

Note: If the tree does not fall, hit the wedge until it does.

1. When the tree starts to fall, use the path of retreat to move away from the tree. Move a minimum of 5 m/15 ft away from the tree.

To free a trapped tree

WARNING: It is very dangerous to remove a trapped tree and there is a high accident risk. Keep out of the risk zone and do not try to fell a trapped tree.

Diagram illustrating two methods for tree protection, showing no protection circles with a person and a person walking under a tree.

The safest procedure is to use one of the following winches:

- Tractor-mounted

Simple line drawing of a tractor pulling a tree with a lever, no text or symbols present

- Portable

Simple line drawing of a mechanical clamp or lever system with no text or symbols

To cut trees and branches that are in tension

1. Figure out which side of the tree or branch that is in tension.

2. Figure out where the point of maximum tension is.

Simple line drawing of a curved path with a ball and scattered debris, no text or symbols present

1. Examine which is the safest procedure to release the tension.

Note: In some situations the only safe procedure is to use a winch and not your product.

1. Keep a position where the tree or branch can not hit you when the tension is released.

Diagram of a mechanical or hydraulic system with directional arrows and circular components (no text or symbols)

1. Make one or more cuts of sufficient depth necessary to decrease the tension. Cut at or near the point of maximum tension. Make the tree or branch break at the point of maximum tension.

Cross-sectional diagram of a geological or structural cross-section showing layered rock formations and terrain (no text or labels)

WARNING: Do not cut straight through a tree or branch that is in tension.

WARNING: Be very careful when you cut a tree that is in tension. There is a risk that the tree moves quickly before or after you cut it. Serious injury can occur if you are in an incorrect position or if you cut incorrectly.

1. If you must cut across tree/branch, make 2 to 3 cuts, 1 in. apart and with a depth of 2 in.

Diagram showing a cross-section of a layered structure with an upward arrow indicating direction (no text or symbols present)

1. Continue to cut more into the tree until the tree/branch bends and the tension is released.

Diagram of a curved structure with directional arrows indicating flow or movement (no text or symbols)

1. Cut the tree/branch from the opposite side of the bend, after the tension is released.

To use the product in cold weather

CAUTION: Snow and cold weather can cause operation problems. Risk of too low engine temperature or ice on the air filter and the carburetor.

1. Clothe a part of the air intake on the starter. This increases the engine temperature.

2. For temperatures below -5^/23^ or in conditions with snow, a winter cover is available. Assemble the winter cover on the starter housing. The winter cover decreases the flow of cool air and keeps snow away from the carburetor space.

Technical line drawing of a chain-linking device with attached bracket (no text or symbols)

Note: Part number for winter cover: 595 96 76-01

CAUTION: Remove the winter cover if the temperature increases above -5^/

23°F. Risk of too high engine temperature and damage to the engine.

Heated handles (545G Mark II, 550XPG Mark II)

The product has heated front and rear handles. The electrical heating coils are powered by a generator.

Push the switch in the direction of the arrow to engage the function. Push the switch in the opposite direction to disengage the function.

Technical line drawing of a mechanical clamp or tool with spring and chain (no text or symbols)

Electrical carburetor heating (545G Mark II, 550XPG Mark II)

Adjustment of the carburetor heating is done electrically through a thermostat. This keeps the correct carburetor temperature and prevents ice in the carburetor.

Maintenance

Introduction

WARNING: Read and understand the safety chapter before you do maintenance on the product.

Maintenance schedule

Daily maintenance Weekly maintenance	Monthly maintenance
Clean the external parts of the product and make sure that there is no oil on the handles.	Clean the cooling system. Refer to To clean the cooling system on page 31.	Do a check of the brake band. Refer to To do a check of the brake band on page 23.
Do a check of the throttle trigger and throttle trigger lockout. Refer to To do a check of the throttle trigger and throttle trigger lockout on page 23.	Do a check of the starter, starter rope and return spring.	Do a check of the clutch centre, clutch drum and clutch spring.
Make sure that there is no damage on the vibration damping units.	Lubricate the needle bearing. Refer to To lubricate the needle bearing on page 29.	Clean the spark plug. Refer to To do a check of the spark plug on page 26.
Clean and do a check of the chain brake. Refer to To do a check of the throttle trigger and throttle trigger lockout on page 23To do a check of the front hand guard and the chain brake activation on page 23.	Remove burrs from the edges of the guide bar. Refer to To do a check of the guide bar on page 30.	Clean the external parts of the carburettor.
Do a check of the chain catcher. Refer to To do a check of the chain catcher on page 24.	Clean or replace the spark arrestor mesh on the muffler.	Do a check of the fuel filter and the fuel hose. Replace if necessary.
Turn the guide bar, do a check of the lubrication hole and clean the groove in the guide bar. Refer to To do a check of the guide bar on page 30.	Clean the carburetor area. Do a check of all cables and connections.
Make sure that the guide bar and saw chain are getting sufficient oil.	Clean or replace the air filter. Refer to To clean the air filter on page 26.	Empty the fuel tank.
Do a check of the saw chain. Refer to To examine the cutting equipment on page 30.	Clean between the cylinder fins. Empty the oil tank.
Sharpen the saw chain and do a check of its tension. Refer to To sharpen the saw chain on page 26.
Do a check of the chain drive sprocket. Refer to To do a check of the rim sprocket on page 29.
Clean the air intake on the starter.
Make sure that nuts and screws are tightened.
Do a check of the stop switch. Refer to To do a check of the start/stop switch on page 24.
Make sure that these are no fuel leaks from the engine, tank or fuel lines.
Make sure that the saw chain does not rotate when the engine is at idle speed.
Make sure that there is no damage on the right hand guard.
Make sure that the muffler is correctly attached, has no damages and that no parts of the muffler are missing.

Maintenance and checks of the safety devices on the product

To do a check of the brake band

1. Use a brush to remove wood dust, resin and dirt from the chain brake and clutch drum. Dirt and wear can decrease the function of the brake.

Simple line drawing of a rope tied with a loop, showing rope routing and directional arrows (no text or symbols)

1. Do a check of the brake band. The brake band must be at a minimum of 0.6mm / 0.024 in thick at its thinnest point.

To do a check of the front hand guard and the chain brake activation

1. Make sure that the front hand guard is not damaged and that there are no defects, such as cracks.

2. Make sure that the front hand guard moves freely and that it is attached safely to the clutch cover.

Illustration of a hand using a device to interact with a car (no text or symbols present)

1. Hold the product with 2 hands above a stump or other stable surface.

WARNING: The engine must be off.

1. Let go of the front handle and let the guide bar tip fall against the stump.

Illustration of a person using a manual saw to cut tree bark (no text or symbols)

Illustration of a person using a manual saw to cut tree bark (no text or symbols)

1. Make sure that the chain brake engages as the guide bar tip hits the stump.

To do a check of the chain brake

1. Start the product. Refer to To start the product on page 13 for instructions.

WARNING: Make sure that the saw chain does not touch the ground or other objects.

1. Hold the product tightly.

2. Apply full throttle and tilt your left wrist against the front hand guard to engage the chain brake. The saw chain must stop immediately.

STOP

WARNING: Do not let go of the front handle.

To do a check of the throttle trigger and throttle trigger lockout

1. Make sure that the throttle trigger and throttle trigger lockout move freely and that the return spring works correctly.

Line drawing of a chain-linking device with arrows indicating motion direction (no text or symbols)

1. Press down the throttle trigger lockout and make sure that it goes back to its initial position when you release it.

Line drawing of a mechanical clamp or bracket with an arrow indicating direction (no text or symbols)

1. Make sure that the throttle trigger is locked at the idle position when the throttle trigger lockout is released.

Line drawing of a chain-linking device with an arrow indicating motion (no text or symbols)

1. Start the product and apply full throttle.
2. Release the throttle trigger and make sure that the saw chain stops and stays stationary.

WARNING: If the saw chain rotates when the throttle trigger is in the idle position, speak to your servicing dealer.

To do a check of the chain catcher

1. Make sure that there is no damage on the chain catcher.
2. Make sure that the chain catcher is stable and attached to the body of the product.

Technical line drawing of a hairpin tool with magnified detail view (no text or symbols)

To do a check of the right hand guard

• Make sure that the right hand guard is not damaged and that there are no defects, such as cracks.

Technical line drawing of a mechanical component or bracket (no text or symbols)

To do a check of the vibration damping system

1. Make sure that there are no cracks or deformation on the vibration damping units.
2. Make sure that the vibration damping units are correctly attached to the engine unit and handle unit.

Refer to Product overview on page 2 for information about where the vibration damping system is on your product.

To do a check of the start/stop switch

1. Start the engine.
2. Press the start/stop switch down to the STOP position. The engine must stop.

Line drawing of a chainsaw with an inset showing a small object labeled 'N' (no text or symbols on the diagram itself)

To do a check of the muffler

WARNING: Do not use a product that has a defective muffler or a muffler that is in bad condition.

WARNING: Do not use a product if the spark arrestor mesh on the muffler is missing or defective.

1. Examine the muffler for damages and defects.
2. Make sure that the muffler is correctly attached to the product.

Technical line drawing of a mechanical component with four mounting holes and internal components (no text or symbols)

1. If your product has a special spark arrestor mesh, clean the spark arrestor mesh weekly.

Technical line drawing of a mechanical device with internal components and a black arrow indicating a downward motion (no text or symbols)

1. Replace a damaged spark arrestor mesh.

CAUTION: If the spark arrestor mesh is blocked the product becomes too hot and this causes damage to the cylinder and piston.

AutoTune™

Your product has the AutoTune™ function that adjusts the carburetor automatically, which gives the best possible adjustment. AutoTune™ lets the engine adapt to weather conditions, altitude, gasoline and the type of two-stroke oil.

CAUTION: If AutoTune™ does not work correctly, speak to your servicing dealer. The product adjusts correctly after some fuelings.

To replace a broken or worn starter rope

1. Loosen the screws to the starter housing
2. Remove the starter housing.

Line drawing of a chainsaw with arrows indicating force or movement (no text or symbols)

1. Pull out the starter rope approximately 30 cm/12 in and put it in the notch on the pulley.

Illustration of two hands performing a manual tool on a mechanical component, no text or symbols present

1. Let the pulley rotate slowly rearward to release the recoil spring.

Two identical illustrations of a car engine component being assembled, showing hand positioning and internal components (no text or symbols)

1. 545 Mark II, 545G Mark II: Remove the center screw (A), sleeve (B) and spring (C).

WARNING: You must be careful when you replace the return spring or the starter rope. The recoil spring is in tension when it is wound up in the starter housing. If you are not careful, it can eject and cause injuries. Use protective glasses and protective gloves.

1. Remove the used starter rope from the handle and the pulley.
2. Attach a new starter rope to the pulley. Wind the starter rope approximately 3 turns around the pulley.
3. Pull the starter rope through the hole in the starter housing and the starter rope handle.
4. Make a tight knot at the end of the starter rope.
5. 545 Mark II, 545G Mark II: Assemble the spring (C), sleeve (B) and center screw (A).

A B C

To tighten the recoil spring

1. Put the starter rope into the notch in the pulley.
2. Turn the starter pulley approximately 2 turns clockwise.
3. Put your thumb on the pulley.
4. Pull the starter rope handle and pull out the starter rope fully.
5. Move your thumb and release the starter rope.
6. Make sure that you can turn the pulley 12 turn after the starter rope is fully extended.

Two identical illustrations of hands holding a tool inside a container, with no visible text or symbols.

To assemble the starter housing on the product

1. Pull out the starter rope and put the starter in position against the crankcase.

2. Slowly release the starter rope until the pulley engages with the pawls.

3. Tighten the screws that hold the starter.

Line drawing of a hand using a tool to cut a saw blade (no text or symbols)

To clean the air filter

Clean the air filter regularly from dirt and dust. This prevents carburetor malfunctions, starting problems, loss of engine power, wear to engine parts and more fuel consumption than usual.

1. Remove the cylinder cover and the air filter.

2. Use a brush or shake the air filter clean. Use detergent and water to clean it fully.

Note: An air filter that is used for a long time can not be fully cleaned. Replace the air filter regularly and always replace a defective air filter.

1. Attach the air filter and make sure that the air filter seals tightly against the filter holder.

Technical line drawing of a mechanical device with internal components (no text or symbols)

Note: Because of different work conditions, weather or season, your product can be used with different types of air filter. Speak to your servicing dealer for more information.

To do a check of the spark plug

CAUTION: Use the recommended spark plug. Refer to Technical data on page 33. An incorrect spark plug can cause damage to the product.

1. If the product is not easy to start or to operate or if the product operates incorrectly at idle speed, examine the spark plug for unwanted materials. To decrease the risk of unwanted material on the spark plug electrodes, do these steps: a) make sure that the fuel mixture is correct. b) make sure that the air filter is clean.

2. Clean the spark plug if it is dirty.

3. Make sure that the electrode gap is 0,5 mm/0.020 in.

1. Replace the spark plug monthly or more frequently if necessary.

To sharpen the saw chain

Information about the guide bar and saw chain

WARNING: Use protective gloves when you use or do maintenance on the saw chain. A saw chain that does not move can also cause injuries.

Replace a worn or damaged guide bar or saw chain with the guide bar and saw chain combination recommended by Husqvarna. This is necessary to keep the safety functions of the product. Refer to Accessories on page 34, for a list of replacement bar and chain combinations that we recommend.

- Guide bar length, in/cm. Information about the guide bar length can usually be found on the rear end of the guide bar.

Simple line drawing of a test tube with a downward arrow indicating compression or dislocation (no text or symbols)

• Number of teeth on bar tip sprocket (T).

- Chain pitch, in. The distance between the drive links of the saw chain must align with the distance of the teeth on the bar tip sprocket and drive sprocket.

PITCH = D/2 D

• Number of drive links. The number of drive links is decided by the type of guide bar.

Pure mechanical linkage diagram without any text, numbers, or symbols

- Bar groove width, in/mm. The groove width in guide bar must be the same as the chain drive links width.

Diagram showing a vertical pipe with arrows indicating direction and a separate schematic of a bent pipe with internal flow (no text or symbols)

- Chain oil hole and hole for chain tensioner. The guide bar must align with product.

Simple line drawing of a tool or component with two arrows pointing to features (no text or symbols)

- Drive link width, mm/in.

Technical diagram showing a mechanical part with circular holes and a vertical scale bar, no text or symbols present.

General information about how to sharpen the cutters

Do not use a blunt saw chain. If the saw chain is blunt, you must apply more pressure to push the guide bar through the wood. If the saw chain is very blunt, there will be no wood chips but sawdust.

A sharp saw chain eats through the wood and the wood chips becomes long and thick.

The cutting tooth (A) and the depth gauge (B) together makes the cutting part of the saw chain, the cutter. The difference in height between the two gives the cutting depth (depth gauge setting).

A B

When you sharpen the cutter, think about the following:

- Filing angle.

Technical line drawing of a mechanical tool with two views: one showing a curved cut and rotation arrow, the other showing a straight handle (no text or symbols)

- Cutting angle.

Pure mechanical diagram showing a gear or cam mechanism with no text, numbers, or symbols

- File position.

Line drawing of a pair of scissors with a handle and base, no text or symbols present

- Round file diameter.

Simple line drawing of a dropper with a handle and a small symbol (no text or labels)

It is not easy to sharpen a saw chain correctly without the correct equipment. Use Husqvarna file gauge. This

will help you to keep maximum cutting performance and the kickback risk at a minimum.

WARNING: The force of the kickback increases a lot if you do not follow the sharpening instructions.

Note: Refer to To sharpen the cutters on page 28 for information about sharpening of the saw chain.

To sharpen the cutters

1. Use a round file and a file gauge to sharpen the cutting teeth.

Three line drawings of mechanical parts: a tool, a plastic component, and a textured object (no text or symbols)

Note: Refer to Filing equipment and filing angles on page 36 for information about which file and gauge that Husqvarna recommends for your saw chain.

1. Apply the file gauge correctly on to the cutter. Refer to the instruction supplied with the file gauge.

2. Move the file from the inner side of the cutting teeth and out. Decrease the pressure on the pull stroke.

Technical illustration of a mechanical clamp or bracket assembly (no text or symbols visible)

1. Remove material from one side of all the cutting teeth.

2. Turn the product around and remove material on the other side.

3. Make sure that all cutting teeth are the same length.

General information about how to adjust the depth gauge setting

The depth gauge setting (C) decreases when you sharpen the cutting tooth (A). To keep maximum cutting performance you must remove filing material from the depth gauge (B) to receive the recommended depth gauge setting. See Filing equipment and filing angles on

page 36 for instructions about how to receive the correct depth gauge setting for your saw chain.

A B C

WARNING: The risk of kickback increases if the depth gauge setting is too large!

To adjust the depth gauge setting

Before you adjust the depth gauge setting or sharpen the cutters, refer to To sharpen the cutters on page 28, for instructions. We recommend you to adjust the depth gauge setting after each third operation that you sharpen the cutting teeth.

We recommend that you use our depth gauge tool to receive the correct depth gauge setting and bevel for the depth gauge.

Two mechanical tools: a flat tool and a clamped tool (no text or symbols visible)

1. Use a flat file and a depth gauge tool to adjust the depth gauge setting. Only use Husqvarna depth gauge tool to get the correct depth gauge setting and bevel for the depth gauge.

2. Put the depth gauge tool on the saw chain.

Note: See the package of the depth gauge tool for more information about how to use the tool.

1. Use the flat file to remove the part of the depth gauge that extends through the depth gauge tool.

Technical line drawing of a mechanical tool or device with no visible text or symbols

To adjust the tension of the saw chain

WARNING: A saw chain with an incorrect tension can come loose from the guide bar and cause serious injury or death.

A saw chain becomes longer when you use it. Adjust the saw chain regularly.

1. Loosen the bar nuts that hold the clutch cover/chain brake. Use a wrench.

Line drawing of a chain saw with a lever and blade (no text or symbols)

Note: Some models have only one bar nut.

1. Tighten the bar nuts by hand as tightly as you can.
2. Lift the front of the guide bar and turn the chain tensioning screw. Use a wrench.
3. Tighten the saw chain until it is tight against the guide bar but still can move easily.

Line drawing of a chainsaw with a hammer and screw, showing blade and handle (no text or symbols)

1. Tighten the bar nuts using the wrench and lift the front of the guide bar at the same time.
2. Make sure you can pull the saw chain around freely by hand and that it does not hang from the guide bar.

Illustration of two hands holding a curved object with directional arrows indicating movement (no text or symbols)

Note: Refer to Product overview on page 2 for the position of the chain tensioning screw on your product.

To do a check of the saw chain lubrication

1. Start the product and let it operate at 34 throttle. Hold the bar approximately 20 cm/8 in above a surface of light color.

2. If the saw chain lubrication is correct, you see a clear line of oil on the surface after 1 minute.

Illustration of a person using a power saw to cut tree bark with a hammer (no text or symbols)

1. If the saw chain lubrication does not operate correctly, do a check of the guide bar. Refer to To do a check of the guide bar on page 30 for instructions. Speak to your servicing dealer if the maintenance steps does not help.

To do a check of the rim sprocket

The clutch drum has a rim sprocket that can be replaced.

1. Make sure that the rim sprocket is not worn. Replace if necessary.
2. Replace the rim sprocket each time you replace the saw chain.

To lubricate the needle bearing

1. Pull the front hand guard rearward to disengage the chain brake.
2. Loosen the bar nuts and remove the clutch cover.

Note: Some models have only one bar nut.

1. Put the product on a stable surface with the clutch drum up.

2. Lubricate the needle bearing with a grease gun. Use engine oil or a bearing grease of high quality.

Technical diagram of a mechanical assembly with a pipette inserted into a circular housing (no text or symbols)

To examine the cutting equipment

1. Make sure that there are no cracks in rivets and links and that no rivets are loose. Replace if it is necessary.

Diagram showing mechanical assembly with arrows indicating process direction (no text or symbols)

1. Make sure that the saw chain is easy to bend. Replace the saw chain if it is rigid.

2. Compare the saw chain with a new saw chain to examine if the rivets and links are worn.

3. Replace the saw chain when the longest part of the cutting tooth is less than 4 mm/0.16 in. Also replace the saw chain if there are cracks on the cutters.

Pure geometric diagram showing a rectangle and a curved shape with a dashed line indicating a dimension (no text or symbols)

To do a check of the guide bar

1. Make sure that the oil channel is not blocked. Clean if it is necessary.

Simple line drawing of a switch mechanism with a black arrow pointing to the button (no text or symbols)

1. Examine if there are burrs on the edges of the guide bar. Remove the burrs using a file.

Illustration of a cutting tool and a pin, showing a close-up of the blade (no text or symbols)

1. Clean the groove in the guide bar.

Line drawing of a hand holding a ruler or ruler, no text or symbols present

1. Examine the groove in the guide bar for wear. Replace the guide bar if it is necessary.

M×

1. Examine if the guide bar tip is rough or very worn.

Simple line drawing of a test tube with two crossed arrows indicating direction (no text or symbols)

1. Make sure that the bar tip sprocket turns freely and that the lubricating hole in the bar tip sprocket is not blocked. Clean and lubricate if it is necessary.

Illustration of a hand holding a pen with a circular arrow indicating rotation (no text or symbols)

1. Turn the guide bar daily to extend its life cycle.

Simple line drawing of a tool with an arrow indicating direction (no text or symbols)

To do maintenance on the fuel tank and the chain oil tank

• Drain and clean the fuel tank and the chain oil tank regularly.
• Replace the fuel filter yearly or more frequently if necessary.

CAUTION: Contamination in the tanks causes malfunction.

To adjust the chain oil flow

WARNING: Stop the engine before you make adjustments to the oil pump.

1. Turn the adjustment screw for the oil pump. Use a screwdriver or combination wrench.

a) Turn the adjustment screw clockwise to decrease the chain oil flow.
b) Turn the adjustment screw counterclockwise to increase the chain oil flow.

Mechanical assembly diagram showing a lever mechanism with no text or symbols

Recommended settings for the oil pump

• Guide bar length 38-46 cm/15-18 in: Medium flow
• Guide bar length 50-71 cm/20-28 in: Maximum flow

Air cleaning system

AirInjection ^™ is a centrifugal air cleaning system that removes dust and dirt before the particles are caught by the air filter. AirInjection ^™ extends the life of the air filter and the engine.

Line drawing of a chainsaw with a gear and a small brush (no text or symbols)

To clean the cooling system

The cooling system keeps the engine temperature down. The cooling system includes the air intake on the starter (A), the pawls on the flywheel (B), the cooling fins on the cylinder (C), the cooling channel (D) and the cylinder cover (E).

A B C D E

1. Clean the cooling system with a brush weekly or more frequently if it is necessary.
2. Make sure that the cooling system is not dirty or blocked.

CAUTION: A dirty or blocked cooling system can make the product too hot, which can cause damage to the product.

Troubleshooting

The engine does not start

Product part to examine Possible cause	Action
Starter pawls The starter pawls are blocked. Adjust or replace the starter pawls.
		Clean around the pawls.
		Speak to an approved service work-shop.
Fuel tank Incorrect fuel type. Drain the fuel tank and fill with cor-		rect fuel.
		The fuel tank is filled with chain oil. If you have tried to start the product, speak to your servicing dealer. If you have not tried to start the product, drain the fuel tank.
Ignition, no spark The spark plug is dirty or wet. Make sure that the spark plug is dry and clean.
			The electrode gap is incorrect. Clean the spark plug. Make sure that the electrode gap and spark plug is correct, and that the correct spark plug type is the recommended or equivalent.
			Refer to Technical data on page 33 for the correct electrode gap.
Spark plug and cylinder The spark plug is loose. Tighten the spark plug.
		Engine is flooded because of repeated starts with full choke after ignition.
		Remove and clean the spark plug. Put the product on its side with the spark plug hole away from you. Pull the starter rope handle 6-8 times. Assemble the spark plug and start the product. Refer to To start the product on page 13.

The engine starts but stops again

Product part to examine	Possible cause Action
Fuel tank Incorrect fuel type. Drain the	fuel tank and fill with cor-	rect fuel.
Carburetor The idle speed is not correct.	Speak to your servicing dealer.
Air filter Clogged air filter. Clean or replace the air filter.
Fuel filter Clogged fuel filter.	Replace the fuel filter.

Transportation and storage

Transportation and storage

• For storage and transportation of the product and fuel, make sure that there are no leaks or fumes. Sparks or open flames, for example from electrical devices or boilers, can start a fire.
• Always use approved containers for storage and transportation of fuel.
• Empty the fuel and chain oil tanks before transportation or before long-term storage. Discard the fuel and chain oil at an applicable disposal location.
• Use the transportation guard on the product to prevent injuries or damage to the product. A saw chain that does not move can also cause serious injuries.
• Remove the spark plug cap from the spark plug and engage the chain brake.

- Attach the product safely during transportation.

To prepare your product for long-term storage

1. Disassemble and clean the saw chain and the groove in the guide bar.

CAUTION: If the saw chain and guide bar are not cleaned, they can become rigid or blocked.

1. Attach the transportation guard.
2. Clean the product. Refer to Maintenance schedule on page 21 for instructions.
3. Do a complete servicing of the product.

Technical data

Technical data

	Husqvarna 545 Mark II	Husqvarna 545G Mark II	Husqvarna 550 XP Mark II	Husqvarna 550 XPG Mark II
Engine
Cylinder displacement, cm3	50.1 50.1 50.1 50.1
Idle speed, rpm 2800 2800 2800
Maximum engine power acc. to ISO 7293, kW/hp @ rpm	2.7/3.6 @ 9900 2.7/3.6	@ 9900 3.0/4.0 @ 10200	3.0/4.0 @ 10200
Ignition system1
Spark plug NGK CMR6	6H NGK CMR6H NGK	CMR6H NGK CMR6H
Electrode gap, mm 0.5	0.5 0.5 0.5
Fuel and lubrication system
Fuel tank capacity, US Pint/liter	1.12/0.53 1.12/0.53 1.	12/0.53 1.12/0.53
Oil tank capacity, US Pint/liter	0.68/0.32 0.68/0.32 0.	68/0.32 0.68/0.32
Type of oil pump Adjustable Adjustable Adjustable
Weight
Weight, lb/kg 11.7/5.3	12.1/5.5 11.7/5.3 12.1/5.5
Saw chain/guide bar
Type of drive sprocket/number of teeth	Rim/7 Rim/7 Rim/7 Rim/7
Saw chain speed at 133% of maximum engine power speed, ft/s / m/s.	83.3/25.4 83.3/25.4 85.6/26.1 85.6/26.1

Accessories

Recommended cutting equipment

A specific chainsaw model has to be evaluated with the cutting equipment to be recommended and fulfill the requirements in ANSI B175.1-2012 (Internal Combustion Engine-Powered Hand-Held Chainsaws - Safety and Environmental Requirements) and Canadian Standards CSA Z62.1-15 (Chainsaws) and CSA Z62.3-11 (R2016) (Chainsaw kickback).

Chainsaw models Husqvarna 545 Mark II, 545G Mark II, 550 XP Mark II, 550 XPG Mark II met the safety requirements in ANSI B175.1-2012 and Canadian Standards Association CSA Z62.1-15 (Chainsaws) and CSA Z62.3-11 (R2016) (Chainsaw kickback), when equipped with the below listed saw chain and guide bar combination(s).

Note: Other chainsaw models may not meet the kickback requirements when equipped with the listed guide bar and saw chain combinations.

We recommend only to use the listed guide bar and saw chain combinations.

Low kickback saw chain

A saw chain that is designated as Low kickback saw chain, meets the low kickback requirement specified in ANSI B175.1-2012.

Kickback and guide bar nose radius

For sprocket nose bars the nose radius is specified by the number of teeth, such as 10T. For solid guide bars the nose radius is specified by the dimension of the nose radius. For a given guide bar length, you can use a guide bar with smaller nose radius than given.

Note: The usable cutting length is usually 1 in less than the nominal guide bar length.

Approved cutting equipment - 545 Mark II and 545G Mark II
Guide bar Saw chain
Length, in/cm	Pitch, in Gauge, in	/mm Max. nose	radius	Type Length, drive links (no.)		Low kickback
13/33 0.325 0.0	50/1,3 11T Husq	varna		SP33G	56 Yes
15/38 64
16/41 66
18/46 72
20/50 80
Length, in/cm Pitch, in Gauge, in/mm Max. nose radius				Type Length, drive links (no.)		Low kickback
13/33 0.325 0.058/1,5 11T Husqvarna				H25	56 Yes
15/38 64
16/41 12T 66
18/46 72
20/50 80

Approved cutting equipment - 550 XP Mark II and 550 XPG Mark II
Guide bar Saw chain
Length, in/cm P	Pitch, in Gauge, in	mm Max. nose ra- dius		Type Length, drive links (no.)		Low kickback
13/33 0.325 0.0	50/1,3 11T Husqvarna			SP33G	56 Yes
15/38 64
16/41 66
18/46 72
20/50 80
13/33 0.325 0.0	58/1,5 11T Husqvarna			H25	56 Yes
15/38 64
16/41 12T 66
18/46 72
20/50 80
13/33 0.325 0.0	58/1,5 11T Husqvarna			H21	56
15/38 64
16/41 12T 66
18/46 72
20/50 80

Pixel

Pixel is a guide bar and saw chain combination that is more light weight and designated to offer more energy efficient use by cutting narrow cuts. Both guide bar and

saw chain need to be Pixel to get these benefits. Pixel cutting equipment is marked with this symbol.

Filing equipment and filing angles

Use a Husqvarna file gauge to sharpen the saw chain. A Husqvarna file gauge makes sure that you get the correct filing angles. The part numbers are given in the table below.

If you are not sure how to identify the type of saw chain on your product, refer to www.husqvarna.com for more information.

	[aser]
SP33G	84-89°/ 3/16 in81-09 60°	586 93 84-04	0.025 in / 0.65mm	30°	80°
H25 505 69
H21 505 69

Warranty

U.S FEDERAL, AND CANADA EXHAUST AND EVAPORATIVE EMISSIONS CONTROL WARRANTY STATEMENT

YOUR WARRANTY RIGHTS AND OBLIGATIONS

The U.S. Environmental Protection Agency (EPA), Environment and Climate Change Canada and Husqvarna Professional Products, Inc. are pleased to explain the exhaust and evaporative emissions ("emissions") control system warranty on your 2012 and later small off-road engine. In U.S and Canada, new equipment that use small off-road engines must be designed, built, and equipped to meet State's stringent anti-smog standards. Husqvarna Professional Products, Inc. must warrant the emissions control system on your small off-road engine for the periods of time listed below provided there has been no abuse, neglect or improper maintenance of your small off-road engine or equipment leading to the failure of the emissions control system. Your emissions control system may include parts such as the carburetor or fuel injection system, the ignition system, catalytic convertor, fuel tanks, fuel lines (for liquid fuel and fuel vapors), fuel caps, valves, canisters, filters, clamps and other associated components. Also included may be hoses, belts, connectors, and other emission-related assemblies. Where a warrantable condition exists, Husqvarna Professional Products, Inc. will repair your small off-road engine at no cost to you including diagnosis, parts and labor.

MANUFACTURER'S WARRANTY COVERAGE

The exhaust and evaporative emissions control system on your small off-road engine is warranted for two years. If any emissions-related part on your small off-road engine is defective, the part will be repaired or replaced by Husqvarna Professional Products, Inc..

OWNER'S WARRANTY RESPONSIBILITIES

• As the small off-road engine owner, you are responsible for performance of the required maintenance listed in your owner's manual. Husqvarna Professional Products, Inc. recommends that you retain all receipts covering maintenance on your small off-road engine, but Husqvarna Professional Products, Inc. cannot deny warranty coverage solely for the lack of receipts or for your failure to ensure the performance of all scheduled maintenance.
• As the small off-road engine owner, you should however be aware that Husqvarna Professional Products, Inc. may deny you warranty coverage if your small off-road engine or a part has failed due to abuse, neglect, or improper maintenance or unapproved modifications.

- You are responsible for presenting your small off-road engine to a Husqvarna Professional Products, Inc. authorized servicing dealer as soon as the problem exists. The warranty repairs shall be completed in a reasonable amount of time, not to exceed 30 days. If you have any questions regarding your warranty rights and responsibilities, you should contact Husqvarna Professional Products, Inc. in USA at 1-800-487-5951, in CANADA at 1-800-805-5523 or send e-mail correspondence to [e-mail] or [e-mail].

WARRANTY COMMENCEMENT DATE

The warranty period begins on the date the engine or equipment is delivered to an ultimate purchaser.

LENGTH OF COVERAGE

Husqvarna Professional Products, Inc. warrants to the ultimate purchaser and each subsequent owner that the engine or equipment is designed, built, and equipped so as to conform with all applicable regulations adopted by EPA, and is free from defects in materials and workmanship that causes the failure of a warranted part for a period of two years.

WHAT IS COVERED

REPAIR OR REPLACEMENT OF PARTS: Repair or replacement of any defective warranted part will be performed at no charge to you at a brand authorized servicing dealer. Except for repairs and replacement under this Emission Control Warranty, you may choose a repair shop or other person to maintain, replace or repair emission control devices and systems. However, Husqvarna Professional Products, Inc. recommends that all maintenance, replacement and repairs of emission control devices and systems be performed by a brand authorized servicing dealer.

IMPORTANT: This product is compliant with U.S. EPA Phase 3 regulations for exhaust and evaporative emissions. To ensure EPA Phase 3, and Climate Change Canada regulation, we recommend using only genuine product branded replacement parts. Use of non-compliant replacement parts is a violation of federal and state laws.

WARRANTY PERIOD: Any warranted part which is not scheduled for replacement as required maintenance, or which is scheduled only for regular inspection to the effect of "repair or replace as necessary" is warranted for 2 years (or time defined in the product warranty statement, whichever is longer) from the date of purchase by the initial consumer purchaser. Any warranted part which is scheduled for replacement as required maintenance is warranted for the period of the time up to the first scheduled replacement for that part. Any part repaired or replaced under the warranty must be warranted for the remaining warranty period.

DIAGNOSIS: You will not be charged for diagnostic labor that leads to the determination that a warranted part is in fact defective, provided that such diagnostic work is performed at a brand authorized servicing dealer.

OTHER DAMAGES: Husqvarna Professional Products, Inc. will repair other engine components caused by the failure of a warranted part still under warranty.

EMISSION WARRANTY PARTS LIST

1. Carburetor and intake parts or fuel injection system.
2. Air filter and fuel filter covered up to maintenance schedule.
3. Spark Plug, covered up to maintenance schedule.
4. Ignition Module.
5. Mufflers with catalyst and exhaust manifolds.
6. Fuel tank, fuel lines (for liquid fuel and fuel vapors), fuel cap, carbon canister and tip-over/anti-slosh valves as applicable.*
7. Electronic Controls, Vacuum, temperature, and time sensitive valves and switches.
8. Hoses, connectors, and assemblies.
9. All other components the failure of which would increase the engine's exhaust and evaporative emissions of any regulated pollutant as set forth at the following:
10. For U.S. and Canada see US Federal Code of Regulations, 40 C.F.R 1068 Appendix I (iii).

WHAT IS NOT COVERED

All failures caused by abuse, neglect, unapproved modifications, misuse or improper maintenance are not covered.

ADD -ON OR MODIFIED PARTS: Add-on or modified parts that are not exempted by EPA may not be used. The use of any non-exempted add-on or modified parts will be grounds for disallowing a warranty claim.

Husqvarna Professional Products, Inc. will not be liable to warrant failures of warranted parts caused by the use of a non-exempted add-on or modified part.

HOW TO FILE A CLAIM

If you have any questions regarding your warranty rights and responsibilities, you should contact your nearest authorized servicing dealer or call Husqvarna Professional Products, Inc. in USA at 1-800-487-5951, in CANADA at 1-800-805-5523 or send e-mail correspondence to [e-mail] or [e-mail].

WHERE TO GET WARRANTY SERVICE

Warranty services or repairs are provided through all Husqvarna Professional Products, Inc. authorized servicing dealers. If the nearest authorized servicing dealer is more than 100 miles from your location, Husqvarna Professional Products, Inc. will arrange and pay for the shipping costs to and from a brand authorized servicing dealer or otherwise arrange for warranty service in accordance with applicable regulations.

MAINTENANCE, REPLACEMENT AND REPAIR OF EMISSION-RELATED PARTS

Any replacement part may be used in the performance of any warranty maintenance or repairs and must be provided without charge to the owner. Such use will not reduce the warranty obligations of the manufacturer.

MAINTENANCE STATEMENT

The owner is responsible for the performance of all required maintenance, as defined in the owner's manual.

* Evaporative emission parts.

AMERICAN STANDARD SAFETY PRECAUTIONS

SAFETY PRECAUTIONS FOR CHAIN SAW USERS

(ANSI B175.1-2012 Annex Annex C)

KICKBACK SAFETY PRECAUTIONS

WARNING: Kickback may occur when the nose or tip of the guide bar touches an object, or when the wood closes in and pinches the saw chain in the cut.

Tip contact in some cases may cause a lightning fast reverse reaction, kicking the guide bar up and back towards the operator.

Pinching the saw chain along the top of the guide bar may push the guide bar rapidly back towards the operator.

Either of these reactions may cause you to lose control of the saw which could result in serious personal injury.

Do not rely exclusively upon the safety devices built into your saw. As a chain saw user, you should take several steps to keep your cutting jobs free from accident or injury.

With a basic understanding of kickback, you can reduce or eliminate the element of surprise. Sudden surprise contributes to accidents.

Keep a good firm grip on the saw with both hands, the right hand on the rear handle, and the left hand on the front handle, when the engine is running. Use a firm grip with thumbs and fingers encircling the chain saw handles. A firm grip will help you reduce kickback and maintain control of the saw. Don't let go.

Make sure that the area in which you are cutting is free from obstacles. Do not let the nose of the guide bar contact a log, branch, or any other obstacle which could be hit while you are operating the saw.

Cut at high engine speeds.

Do not overreach or cut above shoulder height.

Follow manufacturer's sharpening and maintenance instructions for the saw chain.

Only use replacement bars and chains specified by the manufacturer or the equivalent.

OTHER SAFETY PRECAUTIONS

WARNING: Do not operate a chain saw with one hand! Serious injury to the operator, helpers, bystanders or any combination of these persons may result from one-handed operation. A chain saw is intended for two-handed use.

Do not operate a chain saw when you are fatigued.

Use safety footwear; snug-fitting clothing, protective gloves, and eye, hearing and head protection devices.

Use caution when handling fuel. Move the chain saw at least 10 feet (3 m) from the fueling point before starting the engine.

Do not allow other persons to be near the chain saw when starting or cutting with the chain saw. Keep bystanders and animals out of the work area.

Do not start cutting until you have a clear work area, secure footing and a planned retreat path from the falling tree.

Keep all parts of your body away from the saw chain when the engine is running.

Before you start the engine, make sure that the saw chain is not contacting anything.

Carry the chain saw with the engine stopped, the guide bar and saw chain to the rear, and the muffler away from your body.

Do not operate a chain saw that is damaged, improperly adjusted, or not completely and securely assembled. Be sure that the saw chain stops moving when the throttle control trigger is released.

Shut off the engine before setting the chain saw down.

Use extreme caution when cutting small size brush and saplings because slender material may catch the saw chain and be whipped toward you or pull you off balance.

When cutting a limb that is under tension be alert for springback so that you will not be struck when the tension in the wood fibers is released.

Keep handles dry, clean and free of oil or fuel mixture.

Operate the chain saw only in well-ventilated areas.

Do not operate a chain saw in a tree unless you have been specifically trained to do so.

Do not operate a chain saw above shoulder height.

All chain saw service, other than the items listed in the operator's/owner's safety and maintenance instructions, should be performed by competent chain saw service personnel. (For example, if improper tools are used to

remove the flywheel or if an improper tool is used to hold the flywheel in order to remove the clutch, structural damage to the flywheel could occur and subsequently cause the flywheel to burst.)

When transporting your chain saw, use the appropriate guide bar guard.

Note: This Annex is intended primarily for the consumer or occasional user.

Table des matières

Exploded view diagram of a chain drive with numbered parts and exploded view, including gear, motor, and hardware components.

The engine exhaust from this product contains chemicals known to the State of California to cause cancer, birth defects or other reproductive harm.

Sécurité

Simple line drawing of a crossed-out saw with a diagonal no-smoking symbol (no text or labels)

Prohibition sign showing a worker climbing a rope with a diagonal line, enclosed in a circle (no text or symbols)

Illustration of a person using a saw to cut wood or wood fragments with a curved arrow indicating motion (no text or symbols)

Illustration of a hand operating a mechanical device with chains (no text or symbols)

Prohibition sign showing a person cutting tree with a crossed-out circle and leafy branches

Diagram showing a person falling off a tree with a diagonal line indicating no movement or restriction.

Illustration showing a person wearing a full-body mask, first aid kit, fire extinguisher, and shovel.

Line drawing of a car hood with airflow direction arrow (no text or symbols)

Line drawing of a chainocenter with labeled parts A and B (no text or symbols beyond labels)

Attrape-chaîne

Technical line drawing of a chain-linking tool with an inset close-up showing the same tool (no text or symbols present)

Protège-main droit

Technical line drawing of a mechanical component or bracket (no text or symbols)

Line drawing of a chainsaw with an inset showing a small object labeled 'N' (no text or symbols on the diagram itself)

Illustration of a medical device with a coiled cable and connector (no text or symbols)

Silencieux

Technical line drawing of a mechanical device with mounting holes and internal components (no text or symbols)

Min. 3 m (10 ft)

Simple line drawing of a device with a starburst effect (no text or symbols)

Pure technical diagram of a mechanical component with no text or symbols

Diagram showing a prohibition symbol crossed over layered geological strata with labeled layers and symbols

Simple line drawing of a device with a droplet above it and a curved base (no text or symbols)

Montage

Introduction

Technical diagram showing mechanical assembly with gear and gear slots, annotated with directional arrows and a magnified inset of a component.

Technical line drawing of a mechanical assembly with gears and springs (no text or symbols)

Safety warning illustration showing fuel injection and safety symbols with a worker holding a container

Simple black-and-white icon showing a droplet and a fuel pump with a plus sign (no text or symbols)

Abstract black-and-white graphic of a droplet above a stylized mask (no text or symbols)

Diagram showing a hazard warning symbol with arrows indicating direction of hazard and a chain, likely illustrating safety or risk.

Illustration of a person in protective gear using a power tool with a roller nearby (no text or symbols)

Diagram of a car hood with a curved arrow indicating motion or direction (no text or symbols)

Diagram of a manual tool emitting a curved blade or blade, with no text or symbols present.

Illustration of a person using a chainsaw to cut the chain (no text or symbols present)

Line drawing of a chain-linking device with arrows indicating motion direction (no text or symbols)

Line drawing of a car hood with airflow direction arrow (no text or symbols)

1. Utiliser l'outil.

Arrêt de la machine

Line drawing of a chainsaw with an inset showing a person holding a box (no text or symbols)

Line drawing of a person using a chain mill to cut a circular saw (no text or symbols)

Line drawing of a manual power saw cutting a block, showing blade motion and cutting edge (no text or symbols)

Diagram illustrating a chain-linking process with warning sign and cable attachment mechanism

Illustration of two workers carrying large logs, one holding a tool and the other handling stacked logs (no text or symbols)

Diagram of a manual tool interacting with a circular object, showing motion and rotation (no text or symbols)

Safety warning illustration showing a chain saw cutting down a gear with warning symbol and downward arrow

Diagram illustrating a chain saw tool with two steps: cutting and tree ringing, labeled in English.

Illustration of a landslide with a lightning bolt, warning sign, and triangular warning symbol (no text or labels)

Diagram showing a chain saw with labeled parts and arrows indicating process steps

Safety warning illustration showing a car accident with a hazard symbol and warning triangle

Diagram showing a chain saw tool with three labeled parts: top view, middle view, and bottom view.

Illustration of a hand using a belt drive a rope, showing the angle of motion (no text or symbols present)

Illustration of a hand using a saw to cut tree bark with a black arrow indicating the process (no text or symbols present)

Illustration of a person using a tool to cut tree bark with a downward arrow indicating the process (no text or symbols present)

AVERTISSEMENT: En cas

Illustration of a person spraying tree roots in a forest, with no text or symbols present.

Illustration of a hand holding a magnifying glass over a flame, with no text or symbols present.

Illustration showing a person using a pulley system to lift a vertical pole, with directional arrows indicating force or movement.

Diagram of concentric circular layers with a vertical bar and directional arrows, no text or symbols present.

Diagram illustrating a manual tree cutting process with labeled steps 1 and 2, showing blade turning and tree structure changes.

Diagram showing a tree trunk with a horizontal line and an arrow indicating upward movement (no text or symbols)

Simple line drawing of a mechanical tool or bracket (no text or symbols)

Simple line drawing of a mechanical component or tool with no text or symbols

Cross-sectional diagram of a mechanical component with internal structure and motion arrow (no text or labels)

Cross-sectional diagram of a mechanical component with layered structure and internal channels (no text or labels)

Diagram of a mechanical component with a curved arrow indicating direction (no text or symbols)

Diagram showing a circular structure transforming into a tree with a hanging object (no text or symbols)

Safety warning illustration showing two scenarios: one with a tree and no construction, the other with a person using a tree, both without restrictions.

Simple line drawing of a tractor pulling a tree with a lever (no text or symbols)

- Portable

Simple line drawing of a mechanical clamp or lever mechanism (no text or symbols)

Simple line drawing of a curved path with a ball and a downward arrow, no text or symbols present

Diagram of a mechanical or fluidic system with two curved surfaces and directional arrows indicating flow or movement (no text or symbols)

Diagram showing layered geological strata with no text or symbols

Diagram showing a cross-section of a layered structure with an upward arrow indicating a specific section (no text or symbols present)

Diagram showing two curved surfaces with directional arrows indicating flow or movement (no text or symbols)

Technical line drawing of a chain drive with attached bracket (no text or symbols)

Technical line drawing of a mechanical clamp or tool with a spring-loaded handle (no text or symbols)

Simple line drawing of a rope or rope loop with an arrow indicating upward motion (no text or symbols)

Illustration of a hand using a car to interact with a steering wheel (no text or symbols)

Illustration of two workers using a power manual to cut tree stumps, showing different methods (no text or symbols present)

Line drawing of a chain-linking device with arrows indicating motion direction (no text or symbols)

Line drawing of a mechanical device with directional arrows indicating motion (no text or symbols)

Line drawing of a manual chain-linking device with a black arrow indicating motion (no text or symbols)

Technical line drawing of a chain tool and its magnified view (no text or symbols)

Technical line drawing of a mechanical component or bracket (no text or symbols)

Line drawing of a chainsaw with an inset showing a person inside a box (no text or symbols)

Technical line drawing of a mechanical component with four mounting holes and internal components (no text or symbols)

Technical line drawing of a mechanical device with internal components and a black arrow indicating direction (no text or symbols)

Line drawing of a chain saw with arrows indicating force or movement (no text or symbols)

Illustration of two hands using a tool to lift a component in a basket (no text or symbols present)

Two identical diagrams showing a hand operating a mechanical component with arrows indicating motion or force (no text or symbols present)

1. 545 Mark II, 545G Mark II : Retirer la vis centrale (A), le manchon (B) et le ressort (C).

Two illustrations showing hands operating a device in a basket, with no visible text or symbols.

Line drawing of a hand using a tool to adjust or install a mechanical component (no text or symbols present)

Technical line drawing of a mechanical device showing internal components and housing (no text or symbols)

Simple line drawing of a test tube with a downward arrow indicating compression or dislocation (no text or symbols)

PITCH = D/2 D

Diagram showing a vertical pipe with directional arrows and a schematic of a mechanical component (no text or symbols)

Pure diagram of a tool or component with arrows indicating direction (no text or symbols)

Pure technical diagram showing a mechanical part with two holes and a vertical rod, no text or symbols present.

Technical line drawing of a mechanical tool with two views: one showing a curved component and the other showing a straight handle (no text or symbols)

• L'angle de coupe.

Simple line drawing of a mechanical component with curved arrows indicating motion (no text or symbols)

• La position de la lime.

Line drawing of a screwdriver holding a tool, no text or symbols present

Simple line drawing of a dropper with a small circular symbol (no text or labels)

Line drawings of three mechanical components: a dropper, a bracket, and a clip (no text or symbols)

Technical illustration of a mechanical clamp or bracket assembly (no text or symbols)

Two types of tools: a flat tool and a mechanical clamp (no text or symbols)

Technical line drawing of a mechanical component with no visible text or symbols

Line drawing of a chain saw with a lever and arrow indicating motion (no text or symbols)

Line drawing of a chainsaw with a directional arrow indicating motion (no text or symbols)

Illustration of two hands holding a cylindrical object with directional arrows indicating motion (no text or symbols)

Illustration of a person using a saw to cut tree bark with a downward arrow (no text or symbols)

Technical illustration of a mechanical assembly with a tool inserted into a circular housing (no text or symbols)

Mechanical assembly diagram showing two stages of a turning process with arrows indicating motion (no text or labels)

Pure geometric diagram showing a rectangular shape with a curved cutout and a dashed line indicating a dimension (no text or symbols)

Simple line drawing of a switch handle with a black arrow pointing to the button (no text or symbols)

Illustration of a knife and a cutting tool with a magnified inset showing a vertical blade (no text or symbols)

Line drawing of a hand holding a tool, no text or symbols present

Two abstract geometric symbols: a V-line and an X symbol, likely representing stylized letters or shapes.

Simple line drawing of a test tube with two crossed arrows indicating direction (no text or symbols)

Illustration of a hand holding a device with a circular arrow indicating rotation (no text or symbols)

Simple line drawing of a tool with an arrow indicating direction (no text or symbols)

Mechanical assembly diagram showing a lever mechanism with positive and negative directional arrows (no text or symbols)

Line drawing of a chainsaw with a gear and a small tool emitting smoke (no text or symbols)

Technical diagram of a chain drive with numbered parts and exploded view, including gear, motor, and hardware components.

The engine exhaust from this product contains chemicals known to the State of California to cause cancer, birth defects or other reproductive harm.

Seguridad

Simple line drawing of a crossed-out saw with a diagonal no-smoking symbol (no text or labels)

Prohibition sign showing a worker on a ladder with crossed bars, enclosed in a circle

Illustration of a person using a saw to cut wood or metal, with a curved arrow indicating the process (no text or symbols present)

Illustration of two people using a vehicle, no text or symbols present

Prohibition sign with a figure cutting tree branches, indicating no protection or anti-protection.

Safety warning symbol showing a person climbing a tree with a 'No' circle, indicating no protection or hazard.

Line drawing of a manual car with a curved blade and motion arrow (no text or symbols)

Line drawing of a hairpin being cut off into a close-up view (no text or symbols)

Pure technical line drawing of a mechanical component without any text, numbers, or symbols

Line drawing of a chainsaw with an inset showing a small object (no text or symbols)

Illustration of a medical device with tubing and a bulb (no text or symbols)

Silenciador

Technical line drawing of a mechanical device with mounting holes and internal components (no text or symbols)

Min. 3 m (10 ft)

Simple line drawing of a 3D object resembling a VR headset with a starburst effect (no text or symbols)

Pure technical line drawing of a mechanical part with no text or symbols

0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% 110% 120% 130% 140% 150% 160% 170% 180% 190% 200% 210% 220% 230% 240% 250% 260% 270% 280% 290% 300% 310% 320% 330% 340% 350% 360% 370% 380% 390% 400% 410% 420% 430% 440% 450% 460% 470% 480% 490% 500% 510% 520% 530% 540% 550% 560% 570% 580% 590% 600% 610% 620% 630% 640% 650% 660% 670% 680% 690% 700% 710% 720% 730% 740% 750% 760% 770% 780% 790% 800% 810% 820% 830% 840% 850% 860% 870% 880% 890% 900% 910% 920% 930% 940% 950% 960% 970% 980% 990% 1000% No 1.1% 1.2% 1.3% 1.4% 1.5% 1.6% 1.7% 1.8% 1.9% 2.0% 2.1% 2.2% 2.3% 2.4% 2.5% 2.6% 2.7% 2.8% 2.9% 3.0% 3.1% 3.2% 3.3% 3.4% 3.5% 3.6% 3.7% 3.8% 3.9% 4.0% 4.1% 4.2% 4.3% 4.4% 4.5% 4.6% 4.7% 4.8% 4.9% 5.0% 5.1% 5.2% 5.3% 5.4% 5.5% 5.6% 5.7% 5.8% 5.9% 6.0% 6.1% 6.2% 6.3% 6.4% 6.5% 6.6% 6.7% 6.8% 6.9% 7.0% 7.1% 7.2% 7.3% 7.4% 7.5% 7.6% 7.7% 7.8% 7.9% 8.0% 8.1% 8.2% 8.3% 8.4% 8.5% 8.6% 8.7% 8.8% 8.9% 9.0% 9.1% 9.2% 9.3% 9.4% 9.5% 9.6% 9.7% 9.8% 9.9% 10.0 No 1.1% 1.2% 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 5.0 5.1 5.2 5.3 5.4 5.5 5.6 5.7 5.8 5.9 6.0 6.1 6.2 6.3 6.4 6.5 6.6 6.7 6.8 6.9 7.0 7.1 7.2 7.3 7.4 7.5 7.6 7.7 7.8 7.9 8.0 8.1 8.2 8.3 8.4 8.5 8.6 8.7 8.8 8.9 9.0 9.1 9.2 9.3 9.4 9.5 9.6 9.7 9.8 9.9 10.0

Simple line drawing of a droplet falling into a container with a handle (no text or symbols)

Montaje

Introducción

Technical diagram showing mechanical assembly with gear and chain components, including a magnified inset of a component detail.

Technical line drawing of a mechanical assembly with no visible text or symbols

Safety warning illustration showing fuel injection and hazard symbols for a person wearing a cap.

Simple black-and-white icon showing a fuel pump with a droplet and plus sign (no text or symbols)

Abstract black-and-white graphic with droplet and mask-like shapes (no text or symbols)

Diagram showing a warning sign with arrows and a gear mechanism, likely related to safety or hazard prevention.

Illustration of a person in protective gear spraying water with a rolled paper roll (no text or symbols)

Line drawing of a mechanical device with a curved arrow indicating motion (no text or symbols)

Diagram of a mechanical device with a curved arrow indicating rotation or movement (no text or symbols)

Illustration of a person using a chainsaw to cut the wood (no text or symbols present)

Line drawing of a chain-linking device with arrows indicating motion direction (no text or symbols)

Simple line drawing of a manual car with a curved handle and airflow arrow (no text or symbols)

Line drawing of a chainsaw with an inset showing a person holding a box (no text or symbols)

Line drawing of a person using a chainsaw to cut a circular object with motion arrows (no text or symbols)

Line drawing of a manual saw cutting process with arrows indicating motion (no text or symbols)

Diagram illustrating a chain-linking process with warning sign and cable attachment mechanism

Illustration of two workers handling stacked logs, one wearing a hard hat and the other in safety gear (no text or symbols)

Diagram of a manual tool interacting with a circular object, showing motion and rotation (no text or symbols)

Safety warning illustration showing a chain saw cutting down a gear with warning symbol and downward arrow

Diagram illustrating a chain saw tool with two steps: cutting and rolling, labeled with arrows and numbered instructions.

Illustration of a landslide with a falling object and warning symbol (no text or labels)

Diagram showing a chain saw with three labeled parts: cutting edge, cross-section, and tree cut.

Simple line drawing of a car with a warning sign and explosion symbol (no text or labels)

Diagram showing three steps of a chain saw tool: cutting, opening, and opening with labeled arrows.

Illustration of a hand using a cable to lift a car, showing the angle and motion direction (no text or symbols)

Illustration of a hand using a saw to cut tree bark with a black arrow indicating the process (no text or symbols present)

Illustration of a person using a tool to cut tree bark with a downward arrow indicating the process (no text or symbols present)

Illustration of a person spraying tree roots in a forest, with no text or symbols present.

Illustration of a person holding a magnifying glass with a crossed-out circle, no text or symbols present

Illustration showing a person using a pulley system to lift a vertical pole, with directional arrows indicating force or movement.

Diagram of concentric circular layers with a vertical bar and directional arrows, no text or symbols present.

Diagram illustrating a manual tree cutting process with labeled steps 1 and 2, showing tool path and leaf structure changes.

Diagram showing a geological or structural interaction with arrows indicating direction of movement (no text or symbols present)

Simple line drawing of a mechanical tool or bracket (no text or symbols)

Simple line drawing of a mechanical component or tool (no text or symbols)

Cross-sectional diagram of a mechanical component with internal structure and motion arrow (no text or labels)

Cross-sectional diagram of a mechanical or electrical component with layered structure and internal channels (no text or symbols)

Mechanical diagram showing a rotating shaft with a curved arrow indicating motion (no text or symbols)

Diagram showing a circular structure transforming into a tree with a triangular structure (no text or symbols)

Safety illustration showing two scenarios of tree damage: one with a person using a net, the other with a person using a pole and another without it.

Line drawing of a tractor pulling a tree with a lever (no text or symbols)

- Portátil

Simple line drawing of a mechanical clamp or lever mechanism (no text or symbols)

Simple line drawing of a curved path with a ball rolling down, no text or symbols present

Diagram of a mechanical or fluid system with directional arrows and circular components, no text or symbols present.

Diagram showing layered geological strata with wavy patterns and triangular structures (no text or labels)

Diagram showing a cross-section of a layered structure with an upward arrow, no text or symbols present

Diagram showing airflow or particle movement between two curved surfaces with directional arrows (no text or symbols)

Technical line drawing of a chain drive with attached bracket (no text or symbols)

Technical line drawing of a mechanical clamp or tool with spring and chain (no text or symbols)

Simple line drawing of a rope tied with a hook, showing rope movement and directional arrows (no text or symbols)

Illustration of a hand using a car seatbelt to lift a vehicle, showing motion arrows (no text or symbols)

Illustration of a person using a power saw to cut tree bark (no text or symbols)

Illustration of a person using a manual saw to cut tree bark (no text or symbols)

Line drawing of a chain-linking device with directional arrows indicating motion (no text or symbols)

Line drawing of a mechanical tool or device with an arrow indicating direction (no text or symbols present)

Line drawing of a manual chain saw with a gear and blade (no text or symbols)

Technical line drawing of a hairpin tool and its side view showing blade alignment (no text or symbols)

Pure technical line drawing of a mechanical component (no text or symbols)

Line drawing of a chainsaw with an inset showing a person holding a box labeled 'N' (no text or symbols on the diagram itself)

Technical line drawing of a mechanical component with four mounting holes and internal components (no text or symbols)

Technical line drawing of a mechanical device with internal components and a black arrow indicating direction (no text or symbols)

Line drawing of a chainsaw with arrows indicating cutting direction (no text or symbols)

Illustration of two hands using a tool to lift a component in a container (no text or symbols)

Two identical diagrams showing a hand operating a mechanical component with arrows indicating motion (no text or symbols present)

Illustration of two hands using a tool to adjust or install a mechanical component (no text or symbols visible)

Line drawing of a hand using a tool to cut a saw (no text or symbols present)

Technical line drawing of a mechanical device with internal components (no text or symbols)

Simple line drawing of a cylindrical object with a downward arrow and two small circular features inside (no text or symbols)

PITCH = D/2 D

Technical line drawing showing a mechanical component with arrows indicating direction (no text or symbols)

Pure diagram of a mechanical component with arrows indicating direction (no text or symbols)

Pure technical diagram showing a mechanical part and a vertical rod with directional arrows (no text or symbols)

Technical line drawing of a mechanical tool with two views: one showing a curved cut and rotation arrow, the other showing a straight handle (no text or symbols)

- Ángulo del corte.

Diagram of a mechanical component with curved arrows indicating motion or force direction (no text or symbols)

Line drawing of a screwdriver holding a tool, no text or symbols present

Simple line drawing of a dropper with a small circular symbol (no text or labels)

Line drawings of three mechanical components: a dropper, a bracket, and a clamp device (no text or symbols)

Mechanical assembly diagram showing a clamp or bracket with diagonal bracing and mounting holes (no text or symbols)

Two mechanical tools: a flat tool and a clamped device (no text or symbols visible)

Technical line drawing of a mechanical component with no visible text or symbols

Line drawing of a chain saw with a lever and gear (no text or symbols)

Line drawing of a chainsaw with a directional arrow indicating motion (no text or symbols)

Illustration of two hands holding a curved object with directional arrows indicating motion (no text or symbols)

Illustration of a person using a power tool to cut tree bark with a saw (no text or symbols)

Technical illustration of a mechanical assembly with a pipette inserted into a circular housing (no text or symbols)

Diagram showing mechanical assembly with arrows indicating force direction (no text or symbols)

Pure technical line drawing of a mechanical part with no text or symbols

Simple line drawing of a switch mechanism with a black arrow indicating downward motion (no text or symbols)

Illustration of a pair of scissors cutting a cylindrical object, with a magnified inset showing the same tool (no text or symbols present)

Line drawing of a hand using a tool to cut a cylindrical object (no text or symbols)

Two abstract geometric symbols: a vertical line and a crossed-out X, likely representing stylized letters or symbols.

Simple line drawing of a tool with two crossed X marks and downward arrows indicating direction (no text or symbols)

Illustration of a hand holding a pen with a curved arrow indicating rotation (no text or symbols)

Simple line drawing of a tool with an arrow indicating direction (no text or symbols)

Mechanical assembly diagram showing a lever mechanism with positive and negative directional arrows (no text or symbols)

Line drawing of a chainsaw with a gear and a small tool emitting smoke (no text or symbols)

Original instructions