128PS - Saw HUSQVARNA - Free user manual and instructions

USER MANUAL 128PS HUSQVARNA

1. Chain lubrication adjustment screw

2. Protective guard for saw chain

3. Chain tensioning screw

14. Harness support hook

Symbols on the product WARNING! This product is dangerous. Injury or death can occur to the operator or bystanders if the product is not used carefully and correctly. To prevent injury to the operator or bystanders, read and obey all safety instructions in the operator's manual. Please read the operator's manual carefully and make sure that you understand the instructions before use. Use a protective helmet in locations where objects can fall on you. Use approved hearing protection. Use approved eye protection. Use approved protective gloves. Use heavy-duty slip-resistant boots. Make sure that long hair is put up above your shoulders. Fuel. Air purge bulb. Choke. Chain oil. Adjustment of the oil flow. The arrows show the limits for the position of the handle.

5 m Safe distance Make sure no person is within the kickback danger zone. Direction of rotation, saw chain. yyyywwxxxx The rating plate shows the serial number. yyyy is the production year, ww is the production week and xxxx is the sequential num- ber. This product is not electrically insulated. If the product touches or comes close to high-voltage power lines it could lead to death or serious injury. Electricity can jump from one point to another by arcing. The higher the voltage, the greater the distance electricity can jump. Electricity can also travel through branches and other objects, especially if they are wet. Always keep a distance of at least 10 m between the machine and high-voltage power lines and/or any objects that are touching them. If you have to work within this safe distance you should always contact the relevant power company to make sure the power is switched off before you start work. The operator of the product must ensure, while working, that no persons or animals come closer than 15 meters. 1780 - 002 - 20.04.2022 3Note: Other symbols/decals on the product refer to certification requirements for other commercial areas. EPA III

MAINTENANCE SPECIFICATIONS AND ADJUSTMENTS. SN: THIS ENGINE MEETS EXH AND EVP EMISSIONS REGULATIONS

FOR SMALL OFF ROAD ENGINES

FAMILY/DISP PLT # SKU #

EMISSION COMPLIANCE PERIOD

(XX:XX) 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 and California emissions requirements.

EMISSION CONTROL LABEL ABBREVIATIONS

General Exhaust emission control systems Evaporative emission control sys- tems ECS Emission control sys- tem ECM Engine control module (Autotune) C Coextruded (Multilay- er) EXH/EVP Exhaust and Evapora- tive EM Engine modification N Nylon HRS Hours OC Oxidizing Catalyst P Treated HDPE or PE REGS Regulations TWC Three way catalyst S Sealed SORE Small off road engines US EPA United States Environ- mental Protection Agency CAL California EVAP Evaporative DISPL Displacement 4 1780 - 002 - 20.04.2022California 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. Product liability As referred to in the product liability laws, we are notliable for damages that our product causes if:• the product is incorrectly repaired.• the product is repaired with parts that are notfrom the manufacturer or not approved by themanufacturer.• the product has an accessory that is notfrom the manufacturer or not approved by themanufacturer.• the product is not repaired at an approvedservice center or by an approved authority. Safety Safety definitions Warnings, cautions and notes are used to point outspecially important parts of the manual.

WARNING: Used if there is a

risk of injury or death for the operatoror bystanders if the instructions in themanual are not obeyed. CAUTION: Used if there is a risk of damage to the product, other materialsor the adjacent area if the instructions inthe 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 usethe product.• This product produces an electromagnetic fieldduring operation. This field may under somecircumstances interfere with active or passivemedical implants. To reduce the risk of serious orfatal injury we recommend persons with medicalimplants to consult their physician and themedical implant manufacturer before operatingthis product.• This product is a dangerous tool if you are notcareful or if you use the product incorrectly. Thisproduct can cause serious injury or death to theoperator or others.• It is very important that you read and understandthe contents of this operator’s manual. If youfeel uncertainty about a work situation orthe operating procedures after you read theoperator's manual, speak to a service agentbefore you continue.• Under no circumstances may the design of theproduct be modified without the permission of themanufacturer. Do not use a product that appearsto have been modified by others and only useaccessories recommended for this product. Non-authorized modifications and/or accessories canresult in serious personal injury or the death ofthe operator or others.• Do a check of the product before use. Refer toSafety devices on the product on page 7 and To check before starting on page 11. Do notuse a defective product. Do the safety checks,maintenance and service instructions describedin this manual. Safety instructions for assembly

WARNING: Read, understand and

obey these instructions carefully beforeyou use the product.• The complete clutch cover and shaft must befitted before the machine is started, otherwise theclutch can come loose and cause personal injury.• The only accessories you can operate withthis product are the cutting attachments werecommend. Refer to Accessories on page 23

• Use approved protective gloves.• Make sure that you assemble the protectivecover and shaft correctly before you start theengine.• To operate the product safely and preventinjury to the operator or other persons, theproduct must always be attached correctly to theharness. Safety instructions for operation

Read the warninginstructions that follow before you domaintenance on the product.• Use personal protective equipment, refer toPersonal protective equipment on page 6 1780 - 002 - 20.04.2022 5• This product is not electrically insulated. If the product touches or comes close to high-voltage power lines it could lead to death or serious bodily injury. Electricity can jump from one point to another by arcing. The higher the voltage, the greater the distance electricity can jump. Electricity can also travel through branches and other objects, especially if they are wet. Always keep a distance of at least 10 m between the product and high-voltage power lines and/or any objects that are touching them. If have to work within this safe distance you should always contact the relevant power company to make sure the power is switched off before you start work.

• Overexposure to vibration can lead to circulatory damage or nerve damage in persons who have poor circulation. Speak to your physician if you experience symptoms of overexposure to vibration. Such symptoms include numbness, loss of feeling, tingling, pricking, pain, loss of strength, changes in skin colour or condition. These symptoms usually show in the fingers, hands or wrists. The risk increases at low temperatures.

• The inside of the muffler contain 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.

• Never use the machine indoors or in spaces lacking proper ventilation. Exhaust fumes contain carbon monoxide, an odourless, poisonous and highly dangerous gas.

• 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. If you must have a spark arrestor mesh in your area, do not use the product without or with a broken spark arrestor mesh.

• If the saw chain does not stop when idling, adjust the idle speed. Refer to To adjust the idle speed on page 21 . Do not use the product until it is correctly adjusted or repaired.

• This product has a long reach. Make sure that no people or animals come closer than 15 m when the product is running.Always look behind you before you turn around with the product. Stop the product immediately if a person or animal enters the 15 m safety zone. If more than one operator does work in the same area, keep a safety distance of a minimum of 15 m.

• Observe the applicable safety regulations for work in the vicinity of overhead power lines. Also falling branches can result in short-circuiting.

• Never stand directly underneath a branch that is being cut. This could lead to serious or even fatal personal injury.

• Watch out for stumps of branches that can be thrown out when you cut. Do not cut too close to the ground where stones and other objects can be thrown out.

• Do not operate the product in bad weather, such as dense fog, heavy rain, strong wind and intense cold. To operate in bad weather can make you tired and add risks, such as icy ground and unpredictable felling direction.

• Do not use the product if you are tired, ill, or under the influence of alcohol, drugs or medicine, as this has a negative effect on your vision, alertness, coordination and judgment.

• Make sure that you can move safely and have a safe stance. Examine the area around you for obstacles such as roots, rocks, branch and ditches. Be careful during work on slopes.

• Do not remove the cut material, or let other persons remove cut material, while the engine is on or the cutting equipment rotates, as this can result in serious injury.

• Do not overreach. Keep a stable position of the feet and a good balance at all times.

• Always hold the product with both hands. Hold the product on the right side of your body.

• Keep your hands and feet away from the saw chain until it has stopped completely when the product is deactivated.

• Never work from a ladder, stool or any other raised position that is not fully secured.

• Do not put the product down with the engine on unless you have it in clear view.

• Listen for warning signals and loud voices when you use hearing protection. Always remove your hearing protection when the engine stops.

• Stop the engine before you move to a new work area. Always attach the transport guard before you move the equipment.

• Never allow children to use or be in the vicinity of the product. Remove the spark plug cap when the product is not under close supervision. Personal protective equipment

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

• Always use approved personal protective equipment when you use the product. Personal protective equipment cannot fully prevent injury but it decreases the degree of injury if an

1780 - 002 - 20.04.2022accident does occur. Let your dealer help youselect the right equipment.• Use a protective helmet where there is a risk offalling objects.• Use approved hearing protection that providesadequate noise reduction. Long-term exposureto noise can result in permanent hearingimpairment.• Use approved eye protection. If you use a visor,you must also use approved protective goggles.Approved protective goggles must comply withthe ANSI Z87.1 standard in the USA or EN 166in EU countries.• Use a visor for face protection. A visor is notenough for protection of the eyes.

• Use gloves when necessary, for example whenyou attach, examine or clean the cuttingequipment.• Use sturdy non-slip boots.• Use clothing made of a strong fabric. Alwaysuse heavy, long pants and long sleeves. Donot use loose clothing that can catch on twigsand branches. Do not wear jewelry, short pants,sandals or go with bare feet. Put your hair upsafely above shoulder level.• Keep first aid equipment close at hand. Safety devices on the product

Read the warninginstructions that follow before you usethe product.• Do not use a product with defective safetydevices.• Do a check of the safety devices regularly. Refer

Maintenance schedule on page 15

• If the safety devices are defective, speak to yourHusqvarna servicing dealer.To do a check of the throttle trigger lockout1. Make sure that the throttle trigger lockout (A) andthrottle trigger (B) move freely and that the returnspring works correctly.

2. Push down the throttle trigger lockout and makesure that it goes back to its initial position whenyou release it.3. Make sure that the throttle trigger is locked at theidle position when the throttle trigger lockout isreleased.4. Start the product and apply full throttle.5. Release the throttle trigger and make sure thatthe saw chain stops and stay stationary.

If the saw chainmoves when the throttle trigger is inthe idle position, then the carburetoridle speed must be adjusted. Refer

To adjust the idle speed on page

To do a check of the stop switch1. Start the engine.1780 - 002 - 20.04.2022

72. Move the stop switch to the stop position and

make sure that the engine stops. To do a check of the muffler

WARNING: Do not use a product

that has a defective muffler.

WARNING: Do not use the product

if the spark arrester screen on the muffler is missing or defective.

WARNING: The muffler becomes

very hot during and after operation and also at idle speed. Use protective gloves to prevent burn injuries. The muffler keeps noise levels to a minimum and points exhaust fumes away from the operator.

2. Examine the muffler for damage and defects.

The inner surfaces of the muffler contain chemicals that can cause cancer. Be careful not to touch these elements if the muffler is damaged.

3. Make sure that the muffler is correctly attached

a) Replace the spark arrester screen if it is damaged. b) Clean the spark arrester screen if it is blocked. CAUTION: If the spark arrester screen is blocked the product becomes too hot and this causes damage to the cylinder and piston. Fuel safety

WARNING: Read the warning

instructions that follow before you use the product.

• Do not mix the fuel indoor or near a heat source.

• Do not start the product if there is fuel or engine oil on the product. Remove the unwanted fuel/oil and let the product dry. Remove unwanted fuel from the product.

• If you spill fuel on your clothing, change clothing immediately.

• Do not get fuel on your body, it can cause injury. If you get fuel on your body, use a soap and water to remove the fuel.

• Do not start the engine if you spill oil or fuel on the product or on your body.

• Do not start the product if the engine has a leak. Examine the engine for leaks regularly.

• Be careful with fuel. Fuel is flammable and the fumes are explosive and can cause injuries or death.

• Do not breathe in the fuel fumes, it can cause injury. Make sure that there is sufficient airflow.

• Do not smoke near the fuel or the engine.

• Do not put warm objects near the fuel or the engine.

• Do not add the fuel when the engine is on.

• Make sure that the engine is cool before you refuel.

• Before you refuel, open the fuel tank cap slowly and release the pressure carefully.

1780 - 002 - 20.04.2022• Make sure there are sufficient airflow when refueling and mixing fuel (petrol and two-stroke oil) or draining the fuel tank.

• Fuel and fuel vapor are highly flammable and can cause serious injury when inhaled or allowed to come into contact with the skin. For this reason, observe caution when handling fuel and make sure there is sufficient airflow.

• Tighten the fuel tank cap carefully or a fire can occur.

• Move the product at a minimum of 3 m (10 ft) from the position where you filled the tank before a start.

• Do not put too much fuel in the fuel tank.

• Make sure that a leak cannot occur when you move the product or fuel container.

• Do not put the product or a fuel container where there is an open flame, spark or pilot light. Make sure that the storage area does not contain an open flame.

• Only use approved containers when you move the fuel or put the fuel into storage.

• Empty the fuel tank before long-term storage. Obey the local law on where to dispose fuel.

• Clean the product before long-term storage.

• Remove the spark plug cap before you put the product into storage to make sure that the engine does not start accidentally. 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 15 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

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

• Only use the guide bar/saw chain combinations and filing equipment that we recommend. Refer

Accessories on page 23 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.

• Keep the correct depth gauge setting. Obey the instructions and use the recommended depth gauge setting.

• 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 chain tension on page 16

• 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. 1780 - 002 - 20.04.2022 9Assembly To attach the loop handle

1. Attach the loop handle to the shaft in compliance

with the illustration and tighten.

2. Make sure that the loop handle attaches between

the arrows on the shaft. To assemble the two-piece shaft

1. Turn the knob to loosen the shaft coupling.

2. Move the locking/release button (A) into the

guide recess. Push the attachment into the coupler until the locking/release button sets into the primary hole (B).

3. Insert the shaft into the shaft coupling. The

button must go through the hole. Note: If the attachment does not go fully into the upper shaft, use a small screwdriver to push the internal drive shaft deeper into the tube. It can be necessary to turn the screwdriver while you push.

4. Make sure that you fully tighten the knob before

you operate the product. To attach the pole saw attachment

WARNING: Stop the product on a

level surface when you install or remove the attachments.

1. Turn the knob counterclockwise and loosen the

coupler on the extension shaft.

2. Remove the transport guard from the coupler.

3. Remove the shaft cap from the attachment.

4. Move the locking/release button into the guide

5. Push the attachment into the coupler until the

locking/release button sets into the primary hole.

6. Do steps1 through 5 again to attach the other

attachment on the engine shaft.

1780 - 002 - 20.04.20227. Turn the knobs on the extension shaft and the engine shaft clockwise and tighten them.

8. Tighten the couplers on the extension shaft and

the engine shaft. To adjust the harness You should always use the harness with the machine to give maximum control over the machine and reduce the risk of fatigue in your arms and back.

1. Put on the harness.

2. Hook the machine onto the harness support

3. Adjust the length of the harness so that the

support hook is roughly level with your right hip. To disassemble the two-piece shaft

1. Turn the knob to loosen the shaft coupling.

2. Push and hold the locking/release button (B).

Pull the shafts apart. Operation Introduction

WARNING: Before you operate the

product, you must read and understand the safety chapter. To check before starting

1. Inspect the working area. Remove any objects

that could be thrown out.

2. Check the saw chain. Never use blunt, cracked

or damaged equipment.

3. Check that the product is in perfect working

4. Check that all nuts and screws are tight.

5. Make sure the chain is adequately lubricated,

refer to To check the chain lubrication on page

6. Check that the saw chain always stops when the

7. Only use the product for the purpose it was

8. Make sure the handle and safety features are in

order. Never use a machine that has any parts missing or has been modified in relation to the specification. Fuel This product has a two-stroke engine. 1780 - 002 - 20.04.2022 11CAUTION: 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 CAUTION: Do not use gasoline with an octane number less than 90 RON (87 AKI). This can cause damage to the product. CAUTION: Do not use gasoline with more than 10% ethanol concentration (E10). This can cause damage to the product. CAUTION: Do not use leaded gasoline. This can cause damage to the product.

• Always use new unleaded gasoline with a minimum octane number of 90 RON (87 AKI) and with less than 10% ethanol concentration (E10).

• Use gasoline with a higher octane number if you frequently use the product at continuously high engine speed.

• Always use a good quality unleaded gasoline/oil mixture. 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)

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.

1. Fill half the quantity of gasoline in a clean

2. Add the full quantity of oil.

3. Shake the fuel mixture.

4. Add the remaining quantity of gasoline to the

5. Carefully shake the fuel mixture.

CAUTION: Do not mix fuel for more than 1 month at a time. To fill the fuel tank

1. Clean the area around the fuel tank cap.

2. Shake the container and make sure that the fuel

is fully mixed. Use a fuel container with an anti- spill valve.

3. Fill the fuel tank.

4. Tighten the fuel tank cap carefully.

5. Move the product 3 m (10 ft) or more away from

the refueling area and fuel source before starting.

1780 - 002 - 20.04.2022CAUTION: Contamination in the tanks causes malfunction. Clean the fuel tank and chain oil tank regularly and replace the fuel filter one time a year or more. 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 safety function to operate correctly. Speak to your servicing dealer when you select your chain oil. Note: This product has an automatic chain lubrication system. You can also adjust the oil flow. Refer to To check the chain lubrication on page 20

• Use Husqvarna chain oil for maximum saw chain life and to minimise environmental damage. 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

Accessories on page 23

• Hold the product as close to your body as possible to get the best balance. Use the harness to support the weight of the machine and make it easier to handle.

• Make sure that the tip does not touch the ground.

• Do not rush the work, but work steadily until all the branches have been cut back cleanly.

• Always slow the engine to idle speed after each working operation. Long periods at full throttle without any load on the engine can lead to serious engine damage.

• Always work at full throttle.

• Whenever possible position yourself so that you can make the cut at right angles to the branch.

• Do not work with the shaft held straight out in front of you as this increases the apparent weight of the cutting attachment.

• Cut large branches in sections so that you have better control over where they fall. 1780 - 002 - 20.04.2022 13• Never cut through the swelling at the root of the branch as this will slow down healing and increase the risk of fungal attack.

• Use the stop at the base of the cutting head to provide support during cutting. This will help prevent the cutting attachment from bouncing on the branch.

• Make an initial cut on the underside of the branch before cutting through the branch. This will prevent tearing of the bark, which could lead to slow healing and cause permanent damage to the tree. The cut should not be deeper than ⅓ of the branch thickness to prevent jamming. Keep the chain running while you withdraw the cutting attachment from the branch to prevent it jamming. To start a cold engine

1. Push the air purge bulb 10 times.

2. Move choke control to the full choke position.

3. Hold the body of the product on the ground with

your left hand. Do not step on the product. Pull the starter rope handle slowly until you feel some resistance. Note: Do not pull the throttle trigger while you start the engine.

4. Pull the starter rope handle 3 times with force.

CAUTION: Do not pull the starter rope until it stops. Do not let go of the starter rope when it is fully extended. Release the starter rope slowly. Failure to obey these instructions can cause damage to the engine.

5. Move the choke control to the half choke

6. Pull the starter rope handle until the engine

7. Let the engine run for 10 seconds.

8. Move the choke control to the no choke position.

To start a warm engine

1. Slowly push the air purge bulb 10 times.

2. Move the choke lever to the HALF CHOKE

3. Pull the starter rope handle quickly until the

4. Move the choke lever to the NO CHOKE

1780 - 002 - 20.04.2022To start the engine when the fuel is too hot If the product does not start, the fuel can be too hot. Note: Always use new fuel and decrease the operation time during warm weather.

1. Put the product in a cool area away from open

2. Let the product cool down for 20 minutes at

3. Press the air purge bulb again and again for

4. Obey the procedure to start a cold engine. Refer

To start a cold engine on page 14

• Push the stop switch to stop the engine. Note: The stop switch automatically goes back to its initial position. About the surface

WARNING: Do not put parts of your

body in the grey marked area. If you touch the grey marked area it can result in burns to the skin. It can also cause electrical shock if the spark plug cap has been damaged. Do not use a product with a damaged spark plug cap. Maintenance Introduction Below you will find some general maintenance instructions. If you need further information please contact your service workshop. Maintenance schedule The following is a list of the maintenance steps that must be performed on the product. Most of the items are described later in this chapter. Note: The user must only carry out the maintenance and service work described in this operator's manual. More extensive work must be carried out by an authorized service workshop. Maintenance Daily Weekly Monthly Clean the external surface. X Examine the harness for damages. X Do a check for damages on the suspension ring. X Make sure that the throttle trigger lock and the throttle works correctly. X Do a check of the stop switch to make sure that it works correctly. X Make sure that the saw chain does not rotate at idle speed. X Clean the air filter. Replace if necessary. X 1780 - 002 - 20.04.2022 15Maintenance Daily Weekly Monthly Check the saw chain with regard to visible cracks in the rivets and links, whether the saw chain is stiff or whether the rivets and links are abnormally worn.

Clean the area under the protective cover. X Make sure that the screws and nuts are tight. X Examine the engine, the fuel tank and the fuel lines for leaks. X Clean the cooling system. X Examine the starter and the starter rope for damages. X Clean the outside of the spark plug. Remove it and do a check of the electrode gap. Adjust the gap to the correct distance (refer to Technical data on page 23 ) or replace the spark plug. Make sure that the spark plug is fitted with a suppressor.

Clean the outside of the carburetor and the space around it. X File off any burrs from the edges of the bar. X Clean or replace the spark arrestor screen on the muffler. X Clean the fuel tank. X Do a check of the fuel filter for contamination and the fuel hose for cracks or other defects. Replace if necessary.

Do a check of all cables and connections. X Do a check of the clutch, clutch springs and the clutch drum for wear. Replace if necessary by an authorized service workshop.

Examine the spark plug. Replace the spark plug if it is necessary. X To adjust the chain tension

WARNING: Put on the gloves

before you adjust the chain tension. The chain is sharp and can cause injuries to you. Note: The chain extends during the operation, specially when you operate for the first 15 minutes. You must examine and adjust the chain tension frequently after you use or refuel the product.

1. Hold the lower end of the chain with a support.

2. Make sure that there are no kinks on the guide

3. Loosen the bar nut (A), and then tighten it with

4. Move the adjustment screw (B) clockwise until

the chain touches the bottom of the guide bar rail. And move the adjustment screw clockwise 1/4 turn.

5. Move the chain around the guide bar to make

sure that all drive links stay in the bar groove.

6. Lift the top of the guide bar, and tighten the bar

nut with the bar tool.

7. Make sure that you can move the chain around

the guide bar with the screwdriver end of the bar tool. 16 1780 - 002 - 20.04.20228. Loosen the bar nut lightly, and loosen the adjustment screw counterclockwise 1/4 turn if you cannot move the chain. Tighten the bar nut.

9. Tighten the adjustment screw clockwise 1/4 turn

if the chain stays loose and hangs below the guide bar. To replace the chain

WARNING: When the chain

becomes worn or damaged, replace it with the low kickback chain.

1. Disconnect the spark plug.

2. Remove the bar nuts and the clutch cover.

3. Turn the adjustment screw counterclockwise by

hand until the adjustment pin is located between the two indicator marks on the clutch cover.

4. Move the guide bar behind the sprocket until the

guide bar stops against the sprocket. Remove the chain.

5. Hold the new chain with the drive links .

6. Put the new chain above and behind the clutch

drum. Set the drive links in the clutch drum sprocket.

7. Keep the bottom of the drive links between the

teeth of the sprocket in the nose of the guide bar.

8. Set the drive links into the bar groove.

9. Pull the guide bar forward until the new chain

sets in the bar groove.

10. Install the clutch cover.

11. Set the adjustment pin in the lower hole of the

12. Install the bar nuts and tighten them with your

To adjust the chain tension on page 16 and tighten fully the bar nuts. 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.

2. Make sure that the saw chain is easy to bend.

Replace the saw chain if it is rigid.

3. Compare the saw chain with a new saw chain to

examine if the rivets and links are worn.

4. 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. To sharpen the saw chain Information about the guide bar and saw chain

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 23 , 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.

• Number of teeth on bar tip sprocket (T). 1780 - 002 - 20.04.2022 17• 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 =

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

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

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

• Drive link width, mm/in. 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).

When you sharpen the cutter, think about the following:

• Round file diameter. 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. Note: Refer to To sharpen the cutters on page

for information about sharpening of the saw chain. 18 1780 - 002 - 20.04.2022To sharpen the cutters

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

cutting teeth. Note: Refer to Filing equipment and filing angles on page 24 for information about which file and gauge that Husqvarna recommends for your saw chain.

2. Apply the file gauge correctly on to the cutter.

Refer to the instruction supplied with the file gauge.

3. Move the file from the inner side of the cutting

teeth and out. Decrease the pressure on the pull stroke.

4. Remove material from one side of all the cutting

5. Turn the product around and remove material on

6. 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. Refer to Technical data on page 23 for instructions about how to receive the correct depth gauge setting for your saw chain.

To adjust the depth gauge setting Before you adjust the depth gauge setting or sharpen the cutters, refer to General information about how to sharpen the cutters on page 18 , 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.

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.

3. Use the flat file to remove the part of the depth

gauge that extends through the depth gauge tool. To do a check of the guide bar

1. Make sure that the oil channel is not blocked.

Clean if it is necessary.

2. Examine if there are burrs on the edges of the

4. Examine the groove in the guide bar for wear.

Replace the guide bar if it is necessary.

5. Examine if the guide bar tip is rough or very

6. 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.

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

To check the chain lubrication

1. Check the chain lubrication each time you refuel.

Aim the tip of the bar at a light coloured surface about 20 cm (8 inches) away. After 1 minute running at 75 % throttle you should see a distinct line of oil on the light surface.

2. 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 19 for instructions. Speak to your servicing dealer if the maintenance steps does not help. Air filter Remove dust and dirt from the air filter to keep it clean and prevent these problems:

• Carburetor malfunctions.

• Problems when you start the product.

• Loss of engine power.

• Increased wear to engine parts.

• Too much fuel consumption. To clean the air filter

1. Remove the air filter cover and remove the filter.

2. Hit the filter against a flat surface to make the

particles fall off. CAUTION: Do not use solvent or compressed air to clean the air filter.

3. Put the air filter back. Make sure that the air filter

fully seals against the air filter holder.

4. Put the air filter cover back.

Note: An air filter that is used for a long time cannot be fully cleaned. Replace the air filter at regular intervals. Always replace a damaged air filter. To do a check of the spark plug CAUTION: Use the recommended spark plug. Refer to Technical data on page 23 . An incorrect spark plug can cause damage to the product. 20 1780 - 002 - 20.04.20221. 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 idle speed is correctly adjusted. b) make sure that the fuel mixture is correct. c) 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 correct.

frequently if necessary. To clean the cooling system CAUTION: A dirty or blocked cooling system can make the product too hot, which can cause damage to the product. The parts of the cooling system are the air intake on the starter (A), the cooling fins on the cylinder (B) and the cylinder cover (C).

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. To adjust the idle speed Your Husqvarna product is made to specifications that decrease harmful emissions.

1. Make sure that the air filter is clean and that the

air filter cover is attached to the product.

2. Turn the idle speed screw (T) clockwise until the

cutting attachment starts to turn.

3. Turn the idle speed screw (T) counterclockwise

until the cutting attachment stops. The idle speed is correct when the engine operates smoothly in all positions. The idle speed must be below the speed when the cutting attachment starts to turn. Note: Refer to Technical data on page 23 for the recommended idle speed.

WARNING: If the cutting

attachment does not stop when you adjust the idle speed, speak to your servicing dealer. Do not use the product until it is correctly adjusted or repaired. To apply grease to the two-piece shaft

• Apply grease to the end of the drive shaft after each 30 hours of operation. 1780 - 002 - 20.04.2022 21Troubleshooting The engine does not start Check Possible cause Procedure Stop switch. The stop switch is in the stop posi- tion. Let an approved service agent re- place the stop switch. Fuel tank. Incorrect fuel type. Drain the fuel tank and fill with cor- rect fuel. Spark plug and cylinder. The spark plug is dirty or wet. Make sure that the spark plug is dry and clean. The spark plug electrode gap is in- correct. Clean the spark plug. Make sure that the electrode gap is correct, refer to Technical data on page

. Make sure that the spark plug has a supressor. The spark plug is loose. Tighten the spark plug. Engine is flooded because of re- peated 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

start a cold engine on page 14

The engine starts but stops again Check Possible cause Procedure Fuel tank Incorrect fuel type. Empty the fuel tank and fill it with correct fuel. Fuel filter The fuel filter is clogged. Replace the fuel filter. Carburetor The idle speed is not correctly ad- justed. Adjust the idle speed with the idle speed screw T. Air filter The air filter is clogged. Clean the air filter. Transportation, storage and disposal 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. 22 1780 - 002 - 20.04.2022• Remove the spark plug cap from the spark plug.

• Attach the product safely during transportation. To prepare your product for long- term storage

1. Stop the product and let it become cool before

2. 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.

3. Attach the transportation guard.

4. Clean the product. Refer to

Maintenance on page 15 for instructions.

5. Do a complete servicing of the product.

Recommended max. speed, rpm 8000 Idle speed, rpm 2300-3200 Max. engine output, according to ISO 8893, kW / hp @ rpm 0.7 / 0.94 @ 8500 Catalytic converter muffler Yes Maximum output shaft rotation 7200 Ignition system Spark plug Champion RCJ 8Y Electrode gap, inch/mm 0.024 / 0.61 Fuel and lubrication system Fuel tank capacity, US Pint / litre 0.85 / 0.4 Oil tank capacity, US Pint / litre 0.3 / 0.14 Weight Without fuel, cutting attachment and guard, Lbs / kg 14.2 / 6.4 Accessories Guidebar and saw chain combinations Recommended guide bar and saw chain combination. Guide bar Saw chain Length, in/cm Pitch, in Gauge, in/mm Type Length, drive links, no. 1780 - 002 - 20.04.2022 23Guide bar Saw chain 8/20 3/8 0.043/1.1 Oregon 90P, 90PX

Poulan Pro UC 81 G, UC 81 GS Filing equipment and filing angles Using Husqvarna file gauge will give you the correct filing angles. We recommend you to always use a Husqvarna file gauge to restore the sharpness of the saw chain. The part numbers are given in the table below. If you do not know which saw chain you have on your product, turn to your servicing dealer. Oregon 90P, 90PX 11/64 in /

MAINTENANCE SPECIFICATIONS AND ADJUSTMENTS. SN: THIS ENGINE MEETS EXH AND EVP EMISSIONS REGULATIONS

FOR SMALL OFF ROAD ENGINES

FAMILY/DISP PLT # SKU #

MAINTENANCE SPECIFICATIONS AND ADJUSTMENTS. SN: THIS ENGINE MEETS EXH AND EVP EMISSIONS REGULATIONS

FOR SMALL OFF ROAD ENGINES

FAMILY/DISP PLT # SKU #