Husqvarna 525LST Mark II Manual

Introduction

Product overview

1. Trimmer head
2. Bevel gear and grease filler cap
3. Cutting attachment guard
4. Trimmer line cutter
5. Shaft
6. Loop handle
7. Throttle trigger
8. Stop switch
9. Throttle trigger lockout
10. Spark plug cap and spark plug
11. Cylinder cover
12. Air filter cover
13. Fuel tank
14. Starter handle
15. Air purge bulb
16. Choke control
17. Handle adjustment
18. Drive disc
19. Operator's manual
20. Combination wrench
21. Hex key
22. Locking pin

Product description

The product is a grass trimmer 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

The product is used with non-metallic trimmer lines, nonmetallic strings or equivalent non-metallic flexible cutting elements. Do not use the product for other tasks than to cut weed, grass or similar soft vegetation.
Note: National regulations can set limit to the operation of the product.
Only use the product with accessories that are approved by the manufacturer. Refer to Accessories.

Symbols on the product

	This product can be dangerous and cause serious injury or death to the operator or others. Be careful and use the product correctly.
	Read the operator's manual carefully and make sure that you understand the instructions before you use this product.
	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.
	Keep a minimum of 15 m distance to persons and animals during operation of the product.
	Only use flexible cutting wire or plastic blades. Do not use metal cutting equipment for grass trimming.
	The arrows show the limit for the handle position.
	Air purge bulb.
	Choke.
	Stop.
	Idle adjustment screw.
	High speed needle.
	Low speed needle.
yyyywwxxxx	The rating plate shows the serial number. yyyy is the production year, ww is the production week.

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

EPA III
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.

California Proposition 65

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

Product damage

We are not responsible for damages to our product 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.

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

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

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

• A clearing saw, brushcutter or trimmer can be dangerous if used carelessly or incorrectly and can cause serious injury or death to the operator or others. It is extremely important that you read and understand the contents of this operator's manual.
• Under no circumstances may the design of the product be modified without the permission of the manufacturer. Never use a product that has been modified in any way from its original specification and always use original accessories. Non-authorized modifications and/or accessories can result in serious personal injury or the death of the operator or others.
• The inside of the muffler contain chemicals that may be carcinogenic. Avoid contact with these elements in the event of a damaged muffler.
• 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.

Safety instructions for operation

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

• You must understand the difference between grass clearing and grass trimming before use.
• If you encounter a situation where you are uncertain how to proceed you should ask an expert. Contact your dealer or your service workshop. Avoid all usage which you consider to be beyond your capability.
• Never use a product that is faulty. Carry out the safety checks, maintenance and service instructions described in this manual. Some maintenance and service measures must be carried out by trained and qualified specialists. Refer to Maintenance.
• All covers, guards and handles must be fitted before you start the product. Ensure that the spark plug cap and ignition lead are undamaged to avoid the risk of electric shock.
• Never use the product if you are fatigued, while under the influence of alcohol or drugs, medication or anything that could affect your vision, alertness, coordination or judgement.
• Do not use the product in bad weather such as dense fog, heavy rain, strong wind, intense cold, etcetera. Working in bad weather is tiring and often brings added risks, such as icy ground, unpredictable felling direction, etcetera.
• The only accessories you can operate with this engine unit are the cutting attachments that we recommend. Refer to Accessories.
• Never allow children to use or be in the vicinity of the product. As the product is equipped with a springloaded start/stop switch and can be started by low speed and force on the starter handle, even small children under some circumstances can produce the force necessary to start the product. This can mean a risk of serious personal injury. Therefore remove the spark plug cap when the product is not under close supervision.
• Running an engine in a confined or badly ventilated area can result in death due to asphyxiation or carbon monoxide poisoning.
• The complete clutch cover and shaft must be fitted before the product is started, otherwise the clutch can come loose and cause personal injury.
• Ensure that no people or animals come closer than 15 m while you work. When several operators are working in the same area the safety distance should be at least 15 m. Otherwise there is a risk of serious personal injury. Stop the product immediately if anyone approaches. Never swing the product around without first checking behind you to make sure that no one is within the safety zone.
• Ensure that people, animals or other things can not affect your control of the product or that they do not come in contact with the cutting attachment or loose objects that are thrown out by the cutting attachment. However, do not use the product unless you are able to call for help in the event of an accident.
• Always inspect the working area. Remove all loose objects such as stones, broken glass, nails, steel wire, string, etcetera, that could be thrown out or become wrapped around the cutting attachment.
• Make sure that you can move and stand safely. Check the area around you for possible obstacles (roots, rocks, branches, ditches, etcetera) in case you have to move suddenly. Take great care when you work on sloping ground.
  
• Keep a good balance and a firm foothold at all times. Do not overreach.
• Always hold the product with both hands. Hold the product on the right side of your body.
• Keep the cutting attachment below waist level.
• Switch off the engine before you move to another area. Fit the transportation guard before you carry or transport the equipment any distance.
• Never put the product down with the engine running unless you have it in clear sight.
• Stop the engine and cutting equipment before you remove material that has wound around the blade shaft. Neither the operator of the product nor anyone else may attempt to remove the cut material while the engine is running or the cutting equipment is rotating, as this can result in serious injury. The bevel gear can get hot during use and may remain so for a while afterwards. You could get burnt if you touch it.
• Watch out for thrown objects. Always wear approved eye protection. Never lean over the cutting attachment guard. Stones, rubbish, etcetera, can be thrown up into the eyes which can cause blindness or serious injury.
• Sometimes branches or grass get caught between the guard and cutting attachment. Always stop the engine before you clean the product.
• 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.
• Listen out for warning signals or shouts when you wear hearing protection. Always remove your hearing protection as soon as the engine stops.
• Overexposure to vibration can lead to circulatory damage or nerve damage in people who have impaired circulation. Contact your doctor if you experience symptoms of overexposure to vibration. These symptoms include numbness, loss of feeling, tingling, pricking, pain, loss of strength, changes in skin color or condition. These symptoms normally appear in the fingers, hands or wrists.
• Do not use a product with a damaged spark plug cap.
• Do not use a product with a damaged muffler.
• Keep all parts of your body away from the rotating cutting attachment and hot surfaces.
• Never use a product with a faulty muffler
• Never start or use the product indoors, near combustible material or in spaces that lacks proper ventilation. The exhaust fumes from the engine contain carbon monoxide, an odorless, poisonous and highly dangerous gas. Also, the exhaust fumes are hot and may contain sparks that can start a fire.

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 accident does occur. Let your dealer help you select the right equipment.
• Use a protective helmet where there is a risk of falling objects.
  
• Use approved hearing protection that provides adequate noise reduction. Long-term exposure to noise can result in permanent hearing impairment.
  
• 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

Read the warning instructions that follow before you use the product.
In this section the product's safety features, its purpose and how checks and maintenance should be carried out to ensure that it operates correctly. See instructions under the heading Introduction to find where these parts are located on your product.
The life span of the product can be reduced and the risk of accidents can increase if product maintenance is not carried out correctly and if service and/or repairs are not carried out professionally. If you need further information please contact your nearest servicing dealer.

Never use a product with damaged safety components. The product's safety equipment must be inspected and maintained as described in this section. If your product fails any of these checks, contact your service agent to get it repaired.

All servicing and repair work on the machine requires special training. This is especially true of the machine's safety equipment. If your machine fails any of the checks described below you must contact your service agent. When you buy any of our products we guarantee the availability of professional repairs and service. If the retailer who sells your machine is not a servicing dealer, ask him for the address of your nearest service agent.

To do a check of the throttle trigger lockout
The throttle lockout is designed to prevent accidental operation of the throttle control.

1. Press the throttle trigger lockout (A) and make sure that the throttle control is released (B). When you release the handle the throttle control and the throttle trigger lockout both move back to their initial positions. This movement is controlled by two independent return springs. This arrangement means that the throttle control is automatically locked at the idle setting.
   
2. Make sure that the throttle control is locked at the idle setting when the throttle trigger lockout is released.
   
3. Press the throttle trigger lockout and make sure that it returns to its intial position when you release it.
   
4. Do a check of the throttle control and throttle trigger lockout move freely and that the return springs work properly.
   
5. Start the product (refer to the instructions under To start the product) and apply full throttle.
6. Release the throttle and make sure that the cutting attachment stops and remains at a standstill. If the cutting attachment rotates with the throttle in the idle position the carburettor idle setting must be checked. See instructions under the chapter Maintenance.
   

To do a check of the stop switch

1. Start the engine.
2. Move the stop switch to the stop position and makesure that the engine stops.
   

To do a check of the cutting attachment guard

Do not use a cutting attachment without an approved and correctly attached cutting attachment guard. Refer to Accessories.

Always use the recommended cutting attachment guard for the cutting attachment that you use. If an incorrect or faulty cutting attachment guard is fitted this can cause serious personal injury. Refer to Accessories.
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.

Trimmer head

Always make sure that the trimmer line is wound tightly and equally around the drum to prevent harmful vibration.

• Only use recommended cutting attachments.
• The length of the trimmer line is important. For a longer trimmer line, more engine power is necessary than for a shorter trimmer line of the same diameter.
• Do not move the installation position of the trimmer guard.
• Make sure that the cutter on the trimmer guard is not damaged. The cutter cuts the trimmer line to the correct length.
• Soak the trimmer line for 2 days before use, to increase its life length.

To do a check of the vibration damping system

Use of incorrectly wound cord or an incorrect cutting attachment increases the level of vibration.
The vibration damping system decreases vibration in the handles to a minimum which makes the operation easier. The vibration damping system decreases the vibrations between the engine unit and the shaft unit.

1. Stop the engine.
2. Do a visual check for deformation and damage, for example cracks.
3. Make sure that the vibration damping units are attached correctly.
   

To do a check of the muffler
The muffler keeps noise levels to a minimum and sends exhaust fumes away from the operator.

• Do a visual check for damage and deformation.
• Make sure that the muffler is correctly attached to the product.
  
• If the muffler on your product has a spark arrester screen, do a visual check. Replace the spark arrester screen if it is damaged.
  1. Clean the spark arrester screen if it is blocked. A blocked spark arrester screen causes the engine to become too hot which causes damage to the engine.
  2. Make sure that the spark arrestor mesh is attached correctly.
     

Fuel Safety

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

• Never start the product if you spill fuel on it. Wipe the spillage of and allow remaining fuel to evaporate.
• Never start the product if you spill fuel on yourself or your clothes. Change your clothes and wash any part of your body that has come in contact with fuel. Use soap and water.
• Never start the product if the product is leaking fuel. Check regularly for leaks from the fuel cap and fuel lines.
• Always put the product on a flat surface and make sure the cutting attachment cannot come in contact with any object while you add fuel.
• Take care when handling fuel. Bear in mind the risk off fire, explosion and inhaling fumes.
• Observe caution when handling fuel and make sure there is adequate ventilation. Fuel and fuel fumes are highly inflammable and can cause serious injury when inhaled or allowed to come in contact with the skin.
• Mix and pour fuel outdoors, where there are no sparks or flames.
• Do not smoke or place hot objects near fuel.
• Always stop the engine and let it cool off for a few minutes before you refuel.
• Open the fuel cap slowly so that any excess pressure is released gently when you refuel.
• Tighten the fuel cap carefully after you refueled.
• Clean the area around the fuel cap. Contamination in the tank can cause operating problems.
• Always move the product 3m (10ft) or further from the refuelling area and source before starting.

Safety instructions for maintenance

Always stop the engine before you do any work on the cutting attachment. The cutting attachment continues to rotate even after the throttle has been released. Ensure that the cutting attachment has stopped completely and disconnect the spark plug before you start to work on it.

A faulty cutting attachment may increase the risk of accidents.

Make sure that the trimmer cord is wound tightly and evenly around the drum, otherwise the product will generate harmful vibration.

• Only use cutting attachments with the guards we recommend. Refer to Accessories.
• Your warranty may not cover damage or liability caused by the use of non-authorized accessories or replacement parts.

Assembly

Introduction

Before you assemble the product, you must read and understand the safety chapter.

Remove the spark plug cable from the spark plug before you assemble the product.

To assemble the loop handle

1. Attach the loop handle onto the shaft between the arrow symbols.
   
2. Put the bracket on the opposite side and put the 2 screws into the holes on the loop handle.
3. Adjust the loop handle to a comfortable position.
4. Tighten the screws.

To assemble and disassemble the cutting attachment guard and trimmer head

1. Attach the correct cutting attachment guard (A) for the trimmer head. Refer to Accessories.
2. Put the cutting attachment guard onto the fitting on the shaft.
3. Attach the cutting attachment guard with the screws (B).
4. Install the drive disc (C) on the output shaft.
5. Turn the output shaft until one of the holes in the drive disc aligns with the related hole in the gear housing.
6. Put the locking pin (D) in the hole to lock the shaft.
   
7. Turn the cutting equipment (E) in the opposite direction from which the cutting equipment rotates.
   
8. To disassemble, do the procedure in the opposite sequence.

Operation

Before you operate the product

• Examine the work area to make sure that you know the type of terrain. Examine the slope of the ground and if there are obstacles, such as stones, branches and ditches.
• Do an overhaul of the product.
• Do the safety inspections, maintenance and servicing that are given in this manual.
• Make sure that all covers, the trimmer guard and the trimmer head are correctly attached and not damaged. Replace the trimmer head and cutting attachment guard if they have been hit or if they have cracks.
  
• 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. The locknut must have a locking force of minimum 1.5Nm. Make sure that the tightening torque is between 35-50 Nm.
  

Do not use the product without a guard or a guard that is defective.

Connectivity

This product is prepared for connectivity and has a location for installation of a Husqvarna Connectivity Device. When the Husqvarna connectivity device is installed, the product has Bluetooth^® wireless technology and can use Husqvarna Fleet Services™ connect to mobile devices. This enables more functions.

To install the Husqvarna connectivity device

Do the steps that follow to install the Husqvarna connectivity device. For more information about the Husqvarna connectivity device, refer to www.husqvarna.com.

1. Remove the screw and open the plastic cover.
   
2. Remove the connector.
   
3. Install the Husqvarna connectivity device.
   
4. Install the connector to the Husqvarna connectivity device.
   
5. Install the plastic cover and tighten the screw.
   

Husqvarna Fleet Services^™

Husqvarna Fleet Services^™ is a cloud solution that gives the commercial fleet manager an overview of all products. It is also possible for the fleet managers to get remote access to information about the product. For more information about Husqvarna Fleet Services^™, refer to www.husqvarna.com.

Husqvarna Connect

Husqvarna Connect is a free app for your mobile device. The Husqvarna Connect app gives extended functions for your Husqvarna product.

• Extended product information.
• Information about, and help with, product parts and servicing.

To start to use Husqvarna Connect

1. Download the Husqvarna Connect app on your mobile device.
2. Register in the Husqvarna Connect app.
3. Follow the instruction steps in the Husqvarna Connect app to connect and register the product.

Note: Husqvarna Connect app is not available for download in all markets. Speak to your servicing dealer for more information.

Fuel

This product has a two-stroke engine.

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

Premixed fuel

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

To mix fuel

Gasoline

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

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

Two-stroke oil

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

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

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 container for fuel.
2. Add the full quantity of oil.
3. Shake the fuel mixture.
4. Add the remaining quantity of gasoline to the container.
5. Carefully shake the fuel mixture.

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

To fill the fuel tank

Obey the procedure that follows for your safety.

1. Stop the engine and let the engine become cool.
2. Clean the area around the fuel tank cap.
   
3. Shake the container and make sure that the fuel is fully mixed.
4. Remove the fuel tank cap slowly to release the pressure.
5. Fill the fuel tank.
   
   Make sure that there is not too much fuel in the fuel tank. The fuel expands when it becomes hot.
6. Tighten the fuel tank cap carefully.
7. Clean fuel spillage on and around the product.
8. Move the product 3 m/10 ft or more away from the refueling area and fuel source before you start the engine.

Note: To see where the fuel tank is on your product, refer to Introduction.

To prepare a cold engine for start

1. Push the air purge bulb again and again until fuel starts to fill the bulb. It is not necessary to fill the air purge bulb fully.
   
2. Move the choke control up into choke position.
   

The cutting attachment starts to rotate immediately when you start the engine with the choke.

To start the product

Read the warning instructions in the safety chapter before you start the product (refer to Safety).

1. Use protective gloves.
2. Hold the body of the product on the ground with your left hand.
   
   Do not use your feet!
3. Hold the starter rope handle with your right hand.
4. Slowly pull out the starter rope with your right hand until you feel some resistance (the starter pawls grip).
   
   Do not twist the starter rope around your hand.
5. Pull the cord quickly and with power.
   
   Do not pull the starter rope all the way out and do not let go off the starter rope handle when the starter rope is fully extended. This can cause damage to the product.
6. Pull the starter rope until the engine starts or for a maximum of 5 times.
7. Reset the choke when the engine starts or after you pull the starter rope 5 times.
8. If it is necessary, pull the starter rope again and again until the engine starts.
9. Let the engine run for 10 seconds.
10. Operate the throttle gradually.
11. Make sure the engine runs smoothly.
    Note: If the engine stops, do the procedure again.

To stop the product

1. Move the stop switch into the stop position to stop the engine.
   

The stop switch automatically goes back to its initial position. In order to prevent accidental starting, the spark plug cap must be removed from the spark plug when assembling, checking and/or maintenance is done.

About the surface

Do not touch the area that is identified with gray in the illustration. There is a risk of burn injuries when the product is hot. There is a risk of electrical shock if the spark plug cap is damaged. Do not use a product that has a damaged spark plug cap.

Grass 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 cm/4-4.75 in.
3. Decrease the engine speed to decrease the risk of damage to plants.
4. Use 80% throttle when you cut grass near objects.
   

To cut the grass

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 the grass.

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.

Maintenance

Maintenance schedule

Only do the maintenance and servicing given in this operator's manual. For maintenance or servicing that is not given in this operator's manual, speak to your servicing dealer.

To adjust the idle speed

1. Make sure that the air filter is clean and the air filtercover is installed.
2. Adjust the idle speed with the idle adjustment screw. The idle adjustment screw T is identified with a "T"
   
3. Turn the idle adjustment screw clockwise until the cutting attachment starts to turn.
4. Turn the idle adjustment screw 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.

If the cutting attachment does not stop when you adjust the idle speed, turn to your nearest servicing dealer. Do not use the product until it is correctly adjusted or repaired.
Note: Refer to Technical data for the recommended idle speed.

To do maintenance on the muffler

The muffler decreases the noise level and points the exhaust gases away from the operator.

Mufflers that have catalytic converters get very hot during operation and will stay hot for some time after you stop the product. This also applies at idle speed. If you touch the product it can result in burns to the skin. Think about of the risk of fire.

1. Stop the product and let it cool down.
2. Remove the cover to the muffler.
   
3. Remove the screw that holds the spark arrestor screen.
   
4. Clean the spark arrestor screen if it is blocked or replace it if it is damaged.

The spark arrestor screen must be replaced if it is damaged. Do not use a product if the spark arrestor screen on the muffler is missing or defective.

If the spark arrestor screen is frequently blocked it can be a sign that performance of the catalytic converter is decreased. Turn to your servicing dealer to examine the muffler. A blocked spark arrestor screen will cause overheating and result in damage to the cylinder and piston.

Cooling system

The product has a cooling system to keep the operation temperature as low as possible.
Clean the components of the cooling system with a brush weekly or more frequently in rougher conditions. A dirty or blocked cooling system makes the product too hot which causes damage to the piston and cylinder.
The cooling system has the components that follow:

1. Air intake on the starter.
2. Fins on the flywheel.
3. Cooling fins on the cylinder.
4. Cylinder cover.
5. Muffler cover.
6. Muffler plate.

To do a check of the spark plug

Always use the recommended spark plug type. Incorrect spark plug type can cause damage to the product.

• Do a check of 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:
  1. Make sure that the idle speed is correctly adjusted.
  2. Make sure that the fuel mixture is correct.
  3. 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.
• Replace the spark plug if it is necessary.

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

An air filter that is damaged, very dirty, or soaked with fuel must always be replaced.
Clean the air filter from dirt and dust regularly. This prevents carburetor malfunctions, starting problems, loss of engine power, wear to engine parts and more fuel consumption than usual.
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. Refer to Maintenance schedule.

1. Move the choke lever up to close the choke valve.
   
2. Remove the air filter cover and the air filters.
   
3. Clean the air filters with warm soap water.
4. Replace the air filters if they cannot be fully cleaned. Always replace a damaged air filter.
5. Clean the inner surface of the air filter cover. Use compressed air or a brush.
6. Do a check of the rubber seal on the air filter. Replace the air filter if the rubber seal is damaged.
7. Make sure that the air filter is dry before you install it.

Bevel gear

The bevel gear is filled with the right quantity of grease at the factory. But, before you use the product, make sure that the bevel gear is 3/4 full with grease. Use Husqvarna special grease.

The grease in the bevel gear does not need to be changed unless repairs are carried out.

Troubleshooting

The engine does not start

The engine starts but stops again

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 storage.

Technical data

Accessories

The accessories used in combination with the specified power heads have been evaluated to ANSI B175.3-2019 Grass Trimmers and Brushcutters Safety Requirements. These combinations have been evaluated by Underwriters Laboratories Inc. (UL) and are consequently UL listed.

The accessories are recommended for use in combination with the specified power heads and have been evaluated to applicable ISO- and EN safety requirement standards by the Swedish Machinery Testing Institute.