543 RBX - Grass trimmer HUSQVARNA - Free user manual and instructions

USER MANUAL 543 RBX HUSQVARNA

4. Cutting attachment guard

13. Air filter cover

32. Handle adjustment

33. Vibration damping system

Product description This product is a brushcutter 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. Intended use Use the product with a saw blade, a grass blade or a trimmer head to cut different types of vegetation. Do not use the product for other tasks than grass trimming, grass clearing and forestry clearing. Use a saw blade to cut fibrous types of wood. Use a grass blade or trimmer head to cut grass. Note: National or local regulations can regulate the use. Comply to given regulations. Only use the product with accessories that are approved by the manufacturer. Refer to Accessories on page 25

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. The product can cause objects to eject, which can cause injury. Maximum speed of the output shaft.

15 m Keep a minimum distance of 15 m to persons and animals during operation of the product. Risk of blade thrust if the cutting equipment touches an object that it does not immediately cut. The product can cut off body parts. Keep a minimum of 15 m distance to persons and animals during operation of the product. Air purge bulb. Start button. Fill fuel. Air intake, summer mode. Air intake, winter mode. Sound power level. The product agrees with the applicable EC directives. The rating plate shows the serial number. yyyy is the production year, ww is the production week. yyyywwxxxx Note: Other symbols/decals on the product refer to certification requirements for other commercial areas. 1099 - 001 - 01.03.2019 3EU V

WARNING: Tampering with the engine voids

the EU type-approval of this product. Product liability As referred to in the product liability laws, we are not liable for damages that our product causes if:

• the product is incorrectly repaired.

• the product is repaired with parts that are not from the manufacturer or not approved by the manufacturer.

• the product has an accessory that is not from the manufacturer or not approved by the manufacturer.

• the product is not repaired at an approved service center or by an approved authority. 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, understand and obey

these instructions carefully before you use the product.

WARNING: 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.

• 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.

• 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.

• Always be careful and use your common sense. If you feel uncertainty about a work situation or the operating procedures after you read the operator's manual, speak to a service agent before you continue.

• Remove the spark plug cap if you let the product out of view. Safety instructions for assembly

WARNING: Read, understand and obey

these instructions carefully before you use the product.

• Remove the spark plug cap from the spark plug before you assemble the product.

• Use approved protective gloves.

• When you use a saw blade or a grass blade, make sure that the correct handlebar, the blade guard and the harness are attached to the product.

• A defective or incorrect guard can cause injury. Do not use a cutting attachment that does not have an approved guard attached.

• Attach the clutch cover and shaft correct before you start the product to prevent the clutch to fall of.

• Make sure that you assemble the cover and shaft correct before you start the engine.

• The drive disc and support flange must engage correctly in the centre hole of the cutting attachment. A cutting attachment that is attached incorrectly can cause injury or death.

• To operate the product safely and prevent injury to the operator or other persons, the product must always be attached correctly to the harness. Personal protective equipment

WARNING: 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 accident does occur. Let your dealer help you select the right equipment.

• Use approved hearing protection.

• Use approved eye protection. If you use a visor, you must also use approved protective goggles. Approved protective goggles must comply with the ANSI Z87.1 standard in the USAs or EN 166 in EU countries.

• Use gloves when necessary, for example when you attach, examine or clean the cutting equipment.

• Use protective boots with steel toes and non-slip soles.

• Use clothing made of a strong fabric. Always use heavy, long pants and long sleeves. Do not use loose clothing that can catch on twigs and branches. Do not wear jewelry, short pants, sandals or go with bare feet. Put your hair up safely above shoulder level.

• Keep first aid equipment close at hand. Safety devices on the product For information about where to find the safety devices, see Product overview on page 2

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 and do maintenance on the safety devices regularly. If the safety devices are defective, speak to your Husqvarna service agent.

• Do not make changes to safety devices. Do not use the product if protective covers, safety switches or other protective devices are not attached or are defective.

• For all service and repair work on the product, especially for the safety devices, special training is necessary. If the safety devices fail the checks given in this operator's manual, you must let a service agent help you. We guarantee that professional repairs and service is available. If your dealer is not a service agent, speak to them for information about the nearest service agent.

• Do not use a cutting attachment without an approved and correctly attached cutting attachment guard. See Accessories on page 25

Safety instructions for operation

WARNING: Read the warning instructions

that follow before you use the product.

• Learn and understand the difference between forestry clearing, grass clearing and grass trimming before you use the product.

• Use personal protective equipment, see Personal protective equipment on page 4

• Long-term exposure to noise can result in permanent hearing loss. Always use approved hearing protection.

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

• Never use the product if it is changed or defective.

• Make sure that the spark plug cap and ignition lead are not damaged to prevent the risk of electrical shock. 1099 - 001 - 01.03.2019 5• Look around the work area to make sure that no persons, animals or objects have a negative effect on the safety of the operation of the product.

• Look around the work area to make sure that no persons or animals touch the cutting attachment or are hit by objects that are ejected from the cutting attachment.

• Examine the work area. Remove all loose objects, such as stones, broken glass, nails, steel wire and string, that can eject or wind around the cutting attachment.

• Do not use the product in a situation or location where you can not get aid if an accident occurs.

• Do not use the product without a guard.

• Make sure that persons or animals keep a distance of a minimum of 15 m during work. 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 2 times the tree height and a minimum of 15 m.

• 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 overreach. Keep a stable position of the feet and a good balance at all times.

• Before you start the product, put it on a flat surface, at a minimum of 3 m from the fuel source and from where you fill fuel. Make sure that there are no objects near or touching the cutting attachment.

• If the cutting attachment rotates at idle speed, let a service agent adjust it. Do not use the product until it is adjusted or repaired.

• Look out for thrown objects. Always use approved eye protection and keep away from the cutting attachment guard. Stones and other small objects can eject into your eyes and cause blindness or other injuries.

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

• 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.

• Always stop the engine and make sure that the cutting equipment does not rotate before you remove material that is wound around the blade shaft or caught between the guard and the cutting attachment.

• Be careful when you remove material from around the cutting equipment. The bevel gear gets hot during operation and can cause burn injuries.

• The exhaust fumes from the engine are hot and can contain sparks. Risk of fire. Be careful around dry and flammable material.

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

• 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 color or condition. These symptoms usually show in the fingers, hands or wrists. The risk increases at low temperatures. To do a check of the throttle trigger lockout The throttle trigger lockout locks the throttle trigger at the idle position to prevent accidental operation of the throttle trigger. When you release the handle of the throttle trigger and the throttle trigger lockout the two move back to their initial positions.

1. Push the throttle trigger lockout (A). Make sure that

the throttle trigger (B) is released.

2. Make sure that the throttle trigger (B) is locked at the

idle position when the throttle trigger lockout is released.

3. Push the throttle trigger lockout (A) and make sure

that it goes back to its initial position when you release it.

1099 - 001 - 01.03.20194. Make sure that the throttle trigger lockout (A) and the throttle trigger (B) move freely.

5. Start the product and apply full throttle. Refer to

start the engine on page 16

6. Release the throttle trigger (B) and make sure that

the cutting attachment stops and stays stationary.

WARNING: If the cutting attachment moves

when the throttle trigger is in the idle position, adjust the idle speed. Refer to Maintenance on page 19

To do a check of the stop switch

1. Start the engine.

2. Move the stop switch to the stop position and make

sure that the engine stops. To do a check of the cutting attachment guard

An incorrect or defective cutting attachment guard can cause serious injury. Refer to Safety instructions for assembly on page 4

WARNING: Always use the recommended

cutting attachment guard for the cutting attachment that you use. If an incorrect or defective cutting attachment guard is installed, this can cause serious injury. Refer

The cutting attachment guard prevents injuries from objects that eject in the direction of the operator. It also prevents injuries that occur if you touch the cutting attachment.

1. Do a visual check for damages, for example cracks.

2. Replace the cutting attachment guard if it is

damaged. 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 muffler

WARNING: Never use a product with a

WARNING: Bear in mind that the exhaust

fumes from the engine are hot and may contain sparks which can start a fire. Never start the product indoors or near combustible material! The muffler keeps noise levels to a minimum and sends exhaust fumes away from the operator. For mufflers it is very important that you follow the instructions on how to check, maintain and service your product. 1099 - 001 - 01.03.2019 7• Regularly check that the muffler is securely attached to the product. Cutting attachment

WARNING: The cutting attachment must not

rotate when you do work on it. Make sure that the engine has stopped. Remove the spark plug cap before you do work on the cutting attachment.

WARNING: Make sure that the cutting

attachment is not damaged. A damaged cutting attachment can cause accidents. Replace a damaged cutting attachment.

WARNING: Use the correct cutting

attachment. Only use the cutting attachment with the guards we recommend, refer to Accessories on page 25

• Use the blades and grass knives to cut coarse grass.

• Use the trimmer head to cut grass.

• An incorrectly sharpened or damaged blade increases the risk of accidents. Keep the teeth of the blade correctly sharpened. Follow the instructions in To sharpen the grass knife and grass blade on page

and use the recommended file gauge.

• Examine the cutting attachment for damage and cracks. Replace the damaged cutting attachment.

• Only use cutting attachments with recommended guards. See Accessories on page 25

Saw blade and grass blade

• Use correctly sharpened blades. An incorrectly sharpened or damaged blade increases the risk of injury.

• Use correctly set blades. Correct blade set is 1 mm. An incorrectly set blade increases the risk of injury and damage.

• To sharpen and set the blade correctly, refer to the instructions that come with the blade. Trimmer head

WARNING: Always make sure the trimmer

line is wound tightly and evenly around the drum to prevent harmful vibration.

• Only use recommended trimmer heads and trimmer lines.

• Only use recommended cutting attachments.

• Smaller machines requires small trimmer heads and vice versa.

• The length of the trimmer line is important. A longer trimmer line requires greater engine power than a shorter trimmer line of the same diameter.

• Make sure that the cutter on the trimmer guard is intact. This cuts the trimmer line to the correct length.

• Soak the trimmer line in water for a couple of days before use to increase the life length. Safety instructions for maintenance

WARNING: Read the warning instructions

that follow before you use the product.

• Stop the engine, make sure that the cutting attachment stops. Remove the cylinder cover and

• The exhaust fumes from the engine contain carbon monoxide, an odourless, poisonous and very dangerous gas that can cause death. Do not run the product indoors or in closed spaces.

• The exhaust fumes from the engine are hot and can contain sparks. Do not run the product indoors or near flammable material.

• Accessories and changes to the product that are not approved by the manufacturer, can cause serious injury or death. Do not change the product. Always use original accessories.

• If the maintenance is not done correctly and regularly, there is an increased risk of injury and damage to the product.

• Only do the maintenance as this operator's manual recommends. Let an approved Husqvarna service agent do all other servicing.

• Let an approved Husqvarna service agent do servicing on the product regularly.

• Replace damaged, worn or broken parts. 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 a 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.

• Do not add fuel to the engine in an indoor area. Not sufficient airflow can cause injury or death because of asphyxiation or carbon monoxide.

• 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. Assembly Introduction

WARNING: Before you assemble the

product, you must read and understand the safety chapter.

WARNING: Remove the spark plug cable

from the spark plug before you assemble the product. To assemble the flexible drive shaft

1. Remove the 2 screws at the shaft coupling.

2. Put the flexible drive shaft through the loops at the

3. Turn and push the flexible drive shaft at the same

4. Tighten the 2 screws.

1099 - 001 - 01.03.2019 95. Assemble the drive shaft sleeve in the clutch cover. Turn and push the drive shaft at the same time to connect it.

6. Make sure that the locking pin goes back to its initial

position. To connect the throttle cable and the stop switch wires

2. Connect the throttle wire from the wire harness (A)

and the throttle wire (B) from the engine in the cover.

4. Connect the stop switch wires into the related

connectors from the engine. To assemble the loop handle

1. Put the loop handle on the shaft.

2. Attach the spacer into the slot in the loop handle.

Attach the nut and the screw. Do not tighten fully.

3. Adjust the product to an applicable work position.

4. Tighten the nut and the screw.

To assemble the J-handle

WARNING: Use the J-handle with grass

blades/grass cutters or trimmer heads/ plastic blades. Do not use saw blades or clearing blades with the J-handle.

1. Attach the J-handle to the loop handle with 3 screws.

2. Adjust the product to an applicable work position.

3. Tighten the screws.

To assemble the cutting equipment The cutting equipment includes a cutting attachment and a cutting attachment guard.

WARNING: Use protective gloves.

WARNING: Always use the cutting

attachment guard that is recommended for the cutting attachment. See Accessories on page 25

WARNING: An incorrectly attached cutting

attachment can result in injury or death. 10 1099 - 001 - 01.03.2019To assemble and disassemble the cutting attachment guard and trimmer head CAUTION: Make sure that the guardextension is attached.1. Attach the correct cutting attachment guard (A) forthe trimmer head. Refer to Cutting equipment onpage 8 2. Put the cutting attachment guard onto the fitting onthe shaft.3. Attach the cutting attachment guard with the bolt.4. Install the drive disc (B) on the output shaft.5. Turn the output shaft until one of the holes in thedrive disc aligns with the related hole in the gearhousing.6. Put the locking pin (C) in the hole to lock the shaft.

7. Turn the trimmer head /plastic blades (H) in theopposite direction from which the trimmer head/plastic blades rotate.

8. To disassemble, follow the instructions in theopposite sequence.

To attach the grass blade and the grass blade guard/combination guard

1. Put the blade guard/combination guard (A) onto theshaft and tighten the bolt to attach it.

2. Make sure that the guard extension is removed.3. Turn the output shaft to align one of the holes in thedrive disc (B) with the related hole in the gearhousing.4. Put the locking pin (C) in the hole to lock the shaft.5. Put the grass blade (D), the support cup (E) and thesupport flange (F) on the output shaft.

6. Make sure that the drive disc and support flangeengages correctly in the centre hole of the grassblade.7. Attach the nut (G).1099 - 001 - 01.03.2019

118. Tighten the nut with the socket wrench. Hold the

shaft of the socket wrench near the blade guard. Tighten in the opposite direction to how the cutting attachment rotates. Tighten it to a torque of 35-50 Nm. To attach the guard extension CAUTION: Use the guard extension when you use a trimmer head/plastic blade. Do not use the guard extension when you use a grass blade.

1. Put the guard extension in the groove of the cutting

2. Put the guard extension into position on the cutting

attachment guard with the 4 locking hooks. To remove the guard extension

• Release the locking hooks with the spark plug wrench. To install the transport guard

1. Install the blade in the transport guard (A).

2. Put the two fasteners (B) into the slots (C) to attach

the transport guard.

To assemble the two-piece shaft

1. Turn the knob to loosen the coupling.

2. Align the tab of the cutting attachment (A) with the

arrow of the coupling (B).

3. Carefully push the shaft into the coupling until you

4. Tighten the knob fully.

1. Turn the knob 3 turns or more to loosen the

3. Hold tight in the end of the shaft that the engine is

4. Pull the attachment straight out of the coupling.

1. Loosen the 2 fasteners that hold the backplate.

2. Loosen the backplate from the frame on 1 side.

3. Adjust the backplate to the correct height. Make sure

that the pin aligns with 1 of the holes on the frame. To adjust the harness

1. Put on the harness of the product.

2. Tighten the hip strap tightly. Make sure that the hip

strap aligns with the hip.

3. Tighten the chest strap.

4. Adjust the chest strap vertically. Make sure that the

chest strap is tight against your body. 1099 - 001 - 01.03.2019

135. Adjust the shoulder strap until the weight is equal on

your shoulders. Operation Introduction

WARNING: Before you operate the product,

you must read and understand the safety chapter. Before you operate the product

• Examine the work area to make sure that you know the type of terrain, the slope of the ground and if there are obstacles such as stones, branches and ditches.

• Do an overhaul inspection of the product.

• Do the safety inspections, maintenance and servicing that are given in this manual.

• Make sure that all covers, guards, handles and the cutting equipment are correctly attached and not damaged.

• Make sure that there are no cracks at the bottom of the grass blade teeth or by the center hole of the blade. Replace the blade if it is damaged.

• Examine the support flange for cracks. Replace the support flange if it is damaged.

• Make sure that the locknut can not be removed by hand. If you can remove it by hand, it does not lock the cutting attachment sufficiently and you must replace it.

• Examine the blade guard for damages or cracks. Replace the blade guard if it has been hit or if it has cracks.

• Examine the trimmer head and cutting attachment guard for damages or cracks. Replace the trimmer

1099 - 001 - 01.03.2019head and cutting attachment guard if they have been hit or if they have cracks. 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. Gasoline CAUTION: Always use a quality gasoline/oil mixture of at least 90 octane (RON). There is a risk that use of lower octane grade causes knocking. This gives rise to high engine temperature, which can result in serious engine damage. CAUTION: If your product is equipped with a catalytic converter use a good quality unleaded gasoline/oil mixture. Leaded gasoline will destroy the catalytic converter.

• Use low-emission gasoline, also know as alkylate gasoline, if it is available.

• Ethanol blended fuel, E10 may be used (max 10% ethanol blend). Using ethanol blends higher than E10 will cause lean running condition which can damage the engine.

• We recommend a higher octane rating when you do work at continuous high speed. Husqvarna alkylate fuel We recommend you to use Husqvarna alkylate fuel for best performance. The fuel contains less dangerous material compared to regular fuel, which decreases dangerous exhaust fumes. The fuel gives a low quantity of dangerous remainings when it is combusted, which keeps the components of the engine more clean. This extends the life of the engine. Husqvarna alkylate fuel is not available in all markets. Two-stroke oil CAUTION: Unsatisfactory oil quality and/or incorrect oil/fuel ratio can damage the product and decrease the life time of catalytic converters. CAUTION: Do not use two-stroke oil for water-cooled outboard engines, also referred to as outboard oil. CAUTION: Do not use oil for four-stroke engines.

• For best results and performance use Husqvarna two-stroke oil.

• If Husqvarna two-stroke oil is not available, use a different two-stroke oil of good quality for air-cooled engines. Speak to your servicing dealer to select the correct oil. Gasoline, l Two-stroke oil, l 2% (50:1)

To mix gasoline and two-stroke oil CAUTION: There is a risk that small errors influence the ratio of the mixture drastically when you mix small quantities of fuel. Carefully measure the quantity of oil to be mixed to make sure that you get the correct mixture. 1099 - 001 - 01.03.2019 151. Fill half the quantity of the gasoline to be used.

2. Add the full quantity of oil and mix (shake) the fuel

3. Add the remaining quantity of gasoline.

4. Carefully mix (shake) the fuel mixture and fill the fuel

tank of the product.

5. Empty and clean the fuel tank if you do not use the

product for some time. Note: Do not mix fuel for more than 1 month at a time and always mix gasoline and oil in a clean container intended for fuel. 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. CAUTION: 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 start the engine

Keep the safety distance of 15 m when the engine starts. There is a risk that the cutting attachment starts to rotate.

1. Set the stop switch to the start position.

2. Push the air purge bulb until the bulb starts to fill with

3. Set the choke control in the choke position.

4. Hold the body of the product on the ground with your

left hand. Do not step on the product.

5. Pull the starter rope handle slowly until you feel

some resistance, then pull the starter rope handle with force.

WARNING: Do not wind the starter rope

6. Continue to pull the starter rope handle until the

engine starts. 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. Risk of damage to the product.

7. When the engine starts, put the choke control in the

run position and apply full throttle. The throttle trigger automatically disengages from the start position.

8. Make sure that the engine runs smoothly.

Keep body parts away from the spark plug cap. Risk of burn injuries. Do not use the product with a damaged spark plug cap. Risk of electrical shock. 16 1099 - 001 - 01.03.2019To stop the engine

• Move the stop switch to the stop position. General work instructions

WARNING: Be careful when you cut a tree

that is in tension. It can spring back to its normal position before or after the cut and hit you or the product, and cause injury.

• Clear an open space at one end of the work area, and start the work from there.

• Move in a regular pattern across the work area.

• Move the product fully to the left and right, to clear a width of 4–5 m on each turn.

• Clear a length of 75 m before you turn and go back. Move the fuel can along with you as you continue.

• Move in a direction where you do not go across ditches and obstacles more than necessary.

• Move in a direction where the wind makes the cut vegetation fall in the cleared area.

• Move along slopes, not up and down. Grass clearing with a grass blade CAUTION: Do not use grass blades and grass knives on wood. Use grass blades and grass knives for long or heavy grass only.

• Move the product from side to side.

• Start the movement from right to left when you cut. Move the product to the right before you cut again.

• Cut with the left side of the grass blade.

• Tilt the grass blade to the left to make the grass fall in a line. This makes it easy to collect the grass.

• Keep a stable position with your feet apart.

• Move forward after each right movement and make sure that you have a stable position again before you cut again.

• Keep the support cup with a light pressure against the ground to make sure that the grass blade does not hit the ground.

• Obey these instructions to decrease the risk that cut material winds around the grass blade: a) Apply full throttle. b) Do not move the grass blade through cut material when you move the product from left to right.

• Before you collect the cut material, stop the engine and remove the product from the harness. Put the product down on the ground. 1099 - 001 - 01.03.2019 17Grass trimming with a trimmer head To trim the grass

1. Hold the trimmer head immediately above the

ground at an angle. Do not push the trimmer line into the grass.

2. Decrease the length of the trimmer line by 10-12

3. Decrease the engine speed to decrease the risk of

4. Use 80 % throttle when you cut grass near objects.

To clear grass with a grass blade

1. Keep your feet apart during operation of the product.

Make sure feet are tightly against the ground.

2. Put the support cup lightly on the ground. This

prevents the blade from touching the ground.

3. Use a sideway movement from right to left for a clear

stroke. Use the left side of the blade (between 8 and 12 o'clock) to cut.

4. Angle the blade to the left when you clear grass.

Note: The grass collects easily in a line.

5. Use a sideway movement from left to right for the

6. Do the work rhythmically.

7. Move forward and keep feet tightly against the

9. Remove the product from the clip on the harness.

10. Put the product on the ground.

1. Make sure that the trimmer line is parallel to the

ground when you cut the grass.

2. Do not push the trimmer head to the ground. This

can cause damage to the product.

3. Move the product from side to side when you cut

grass. Use full speed. To sweep the grass The airflow from the rotating trimmer line can be used to remove cut grass from an area.

1. Hold the trimmer head and the trimmer line parallel

to the ground and above the ground.

2. Apply full throttle.

3. Move the trimmer head from side to side and sweep

Clean the trimmer head cover each time you assemble new trimmer line to prevent unbalance and vibrations in the handles. Also do a check of the other parts of the trimmer head and clean it if necessary. 18 1099 - 001 - 01.03.2019Maintenance Introduction

WARNING: Before you do maintenance, you

must read and understand the safety chapter. For all servicing and repair work on the product, special training is necessary. We guarantee the availability of professional repairs and servicing. If your dealer is not a service agent, speak to them for information about the nearest service agent. Maintenance schedule Maintenance Daily Weekly Monthly Clean the external surface. X Examine the harness for damages. X Do a check of the handle and the handlebar to make sure that they are attached correctly and not damaged.

Make sure that the throttle trigger lock and the throttle operates correctly. X Do a check of the stop switch to make sure that it operates correctly. X Make sure that the cutting attachment does not rotate at idle speed. X Clean the air filter. Replace if it is necessary. X Make sure that the blade is sharp and put correctly in the center, look for cracks. If the blade is not in the center correctly, it can cause damage to the product.

Examine the cutting attachment guard for damages and cracks. Replace it if it is damaged.

Examine the trimmer head for damages and cracks. Replace it if it is damaged. X Make sure that the screws and nuts are tight. X Examine the engine, the fuel tank and the fuel lines for leaks. X Examine the transport guard. Make sure that the blade is not damaged and that the transport guard can be attached correctly.

Clean the cooling system. X Examine the starter and the starter rope for damages. X Examine the vibration damping units for damages and cracks. X Clean the external surface part of the spark plug. Remove it and do a check of the electrode gap. Adjust the electrode gap to the correct distance (refer to Technical data on page 24 ) or replace the spark plug. Make sure that the spark plug has a supressor.

Clean the external surface of the carburetor and the area around it. X Do a check of the bevel gear to make sure that it is filled ¾ with lubricant. Use special grease to fill if it is necessary.

Clean or replace the spark arrestor mesh on the muffler. X Do a check of the fuel filter for contamination and the fuel hose for cracks or oth- er defects. Replace if it is necessary.

Do a check of all cables and connections. X 1099 - 001 - 01.03.2019 19Maintenance Daily Weekly Monthly Do a check of the clutch, clutch springs and the clutch drum for wear. If it is nec- essary to replace 1 or more of these units, speak to your servicing dealer.

Replace the spark plug. Make sure that the spark plug has a supressor. X Examine and clean the spark arrestor mesh on the muffler. X To adjust the idle speed Your Husqvarna product is made to specifications that decrease harmful emissions.

• Make sure that the air filter is clean and the air filter cover is attached before you adjust the idle speed.

• Adjust the idle speed with the idle adjustment screw T which is identified with "T" mark.

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.

• 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.

1. Turn the idle adjustment screw clockwise until the

cutting attachment starts to turn.

2. Turn the idle adjustment screw counterclockwise

until the cutting attachment stops. Note: Refer to

for the recommended idle speed. 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 cooling system includes:

• The cooling fins on the cylinder (A).

• Make sure that the cooling system is not dirty or blocked.

• Clean the cooling system with a brush weekly or more frequently if it is necessary. To clean the air filter CAUTION: An air filter that is damaged must always be replaced. If you use an air filter for a long time, it cannot be fully cleaned. Replace the air filter with a new one at regular intervals.

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

2. Clean the air filter with compressed air.

3. Clean the inner surface of the filter cover. Use air or

4. Make sure that the filter is dry.

Fuel filter When the engine runs short of fuel, make sure that the air hole in the fuel tank cap and the fuel filter (A) are clean.

• Apply grease to the end of the drive shaft after each 30 hours of operation. Bevel gear The bevel gear is filled to ¾ with grease at the factory. Before you use the product, make sure that the grease level has not changed. Use Husqvarna special grease if it is necessary to fill up. Do not replace the grease in the bevel gear. Let servicing personnel do the repair of the bevel gear. To attach and remove the locknut

Stop the engine, use protective gloves and be careful around the sharp edges of the cutting attachment. A locknut is used to attach some types of cutting attachments. The locknut has a left thread.

• To attach, tighten the locknut in the opposite direction to the direction of turning of the cutting attachment.

• To remove the locknut, loosen the locknut in the same direction as the cutting attachment rotates.

• To loosen and tighten the locknut, use a socket wrench with a long shaft. The arrow in the picture shows the area where you can operate the socket wrench.

WARNING: When you loosen and

tighten the locknut, there is a risk of injury from the blade. You must always make sure that the blade guard prevents injury to your hand when you do this. Note: Make sure that you can not turn the locknut by hand. Replace the nut if the nylon lining does not have a resistance of a minimum of 1.5 Nm. The locknut must be replaced after it has been put on approximately 10 times. To examine the spark plug CAUTION: Always use the recommended spark plug type. Incorrect spark plug type can cause damage to the product.

• Examine the spark plug if the engine is low on power, is not easy to start or does not operate correctly at idle speed.

• To decrease the risk of unwanted material on the spark plug electrodes, obey these instructions: 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.

• If the spark plug is dirty, clean it and make sure that the electrode gap is correct, refer to Technical data on page 24

• Replace the spark plug if it is necessary. 1099 - 001 - 01.03.2019 21To adjust the engine Follow these instructions if the engine does not operate correctly.

1. Attach an approved cutting attachment, see

Accessories on page 25

2. Start the engine.

3. Operate the product in usual conditions for 3

4. Lift the cutting attachment in the air and apply full

throttle for 30 seconds. If a trimmer head is used, make sure that the trimmer line is cut to correct length by the guard knife. Note: Do not cut grass or branches during this step.

5. Operate the product in usual conditions to make sure

that the engine operates correctly.

6. If the engine does not operate correctly, do step 4

and 5 again 3 times.

7. Let your Husqvarna dealer adjust/repair the product

if the engine does not operate correctly after you have done all these steps. To sharpen the grass knife and grass blade

WARNING: Stop the engine. Use protective

• To sharpen the grass knife or grass blade correctly, refer to the instructions that come with the cutting attachment.

• Sharpen all edges equally to keep the balance.

Always discard a blade that is damaged. Do not try to make a bent or twisted blade straight and use it again. To lubricate the flexible drive shaft

1. Pull up the knob and remove the drive shaft sleeve

from the clutch cover. a) Shake or pull the drive shaft out of the drive shaft sleeve.

2. Lubricate the drive shaft.

3. Push and turn the drive shaft at the same time to put

it back in the drive shaft sleeve. Keep approximately 10 mm / 0.40 in. of the drive shaft outside the edge of the drive shaft sleeve.

1099 - 001 - 01.03.20194. Align the hole in the drive shaft sleeve with the knob on the clutch cover.

5. Push and turn the drive shaft at the same time to

connect it. Troubleshooting 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. Starter pawls. The starter pawls cannot move free- ly. Remove the starter cover and clean around the starter pawls. See Main- tenance on page 19

Let an approved service agent help you. Fuel tank. Incorrect fuel type. Drain the fuel tank and fill with cor- rect fuel. Spark plug. 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. Make sure that the spark plug has a su- pressor. Refer to technical data for correct electrode gap. The spark plug is loose. Tighten the spark plug. 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. Air filter The air filter is clogged. Clean the air filter. 1099 - 001 - 01.03.2019 23Transportation, storage and disposal Transportation and storage

• Store and transport the product and fuel so that there is no risk that any leakage or fumes comes in contact with sparks or open flames, for example, from electrical machinery, electric motors, electrical relays/switches or boilers.

• When you store and transport fuel always use approved containers intended for this purpose.

• When you store the product for long periods the fuel tank must be emptied. Contact your local petrol station to find out where to dispose excess fuel. Drain the tank into the appropriate containers and in a well ventilated area.

• Ensure that the product is cleaned and that a complete service is carried out before long-term storage.

• The transport guard must always be fitted to the cutting attachment when the product is transported or in storage.

• Secure the product during transport.

• In order to prevent unintentional start of the engine, the spark plug cap must always be removed during long-term storage if the product is not under close supervision and when you perform all service measures.

• Allow the product to cool before you put in i storage. Disposal

• Obey the local recycling requirements and applicable regulations.

• Discard all chemicals, such as engine oil or fuel, at a service center or at an applicable disposal location.

• When the product is no longer in use, send it to a Husqvarna dealer or discard it at a recycling location. Technical data Technical data 543RBX 543RBT Engine Cylinder displacement, cm

Idle speed, rpm 3000 3000 Recommended max. speed, rpm 12000 12000 Speed of output shaft, rpm 8570 8570 Max. engine output, according to ISO 8893, kW/hp @ rpm 1.47/9000 1.47/9000 Catalytic converter muffler No No Ignition system Spark plug NGK CMR7H-10 NGK CMR7H-10 Electrode gap, mm 0.9-1.0 0.9-1.0 Fuel and lubrication system Fuel tank capacity, l/cm

Weight Without fuel, cutting attachment and guard, kg 11.4 11.5

Sound power level, measured dB (A) 112 112 Sound power level, guaranteed L

Equivalent sound pressure level at the operator’s ear, measured according to EN ISO 11806 and ISO 22868, dB(A): Equipped with trimmer head (original) 99 99 Equipped with grass blade (original) 99 99 Vibration levels

Equivalent vibration levels (a hv,eq ) at handles, measured according to EN ISO 11806 and ISO 22867, m/s

Noise emissions in the environment measured as sound power (L

) in conformity with EC directive 2000/14/EC. Reported sound power level for the machine has been measured with the original cutting attach- ment that gives the highest level. The difference between guaranteed and measured sound power is that the guaranteed sound power also includes dispersion in the measurement result and the variations between dif- ferent machines of the same model according to Directive 2000/14/EC.

Reported data for noise pressure level has a typical statistical dispersion (standard deviation) of 1.2 dB (A).

Reported data for vibration level has a typical statistical dispersion (standard deviation) of 0.2 m/s

1099 - 001 - 01.03.2019 25Attachments Art. no. Use with Hedge trimmer attachment with shaft HA 850 967 02 67-01 543 RBK Brushcutter at- tachment with SA 850 shaft 967 02 69-01 543 RBK Brush cutter at- tachment with GTA 850 shaft 967 11 31-0 543 RBK 26 1099 - 001 - 01.03.2019EC Declaration of Conformity EC Declaration of Conformity Husqvarna AB, SE-561 82 Huskvarna, Sweden, tel: +46-36-146500, declares that the backpack brushcutter Husqvarna 543RBX, 543RBK with serial numbers dating from 2016 onwards (the year is clearly stated on the rating plate, followed by the serial number), comply with the requirements of the COUNCIL’S DIRECTIVE:

• of May 17, 2006 ”relating to machinery” 2006/42/EC.

• of February 26, 2014 ”relating to electromagnetic compatibility” 2014/30/EU.

• of May 8, 2000 ”relating to the noise emissions in the environment” 2000/14/EC Conformity assessment according to Annex V. For information relating to noise emissions, refer to Technical data on page 24

• of June 8, 2011 "on the restriction of the use of certain hazardous substances in electrical and electronic equipment" 2011/65/EU. The following standards have been applied: