Husqvarna 323R / 325RX / 325RDX Series Manual

Symbols

Clearing saws, brushcutters and trimmers can be dangerous! Careless or incorrect use can result in serious or fatal injury to the operator or others.

Please read the operator's manual carefully and make sure you understand the instructions before using the machine.

Always wear:

• A protective helmet where there is a risk of falling objects
• Hearing protection
• Approved eye protection

Max. speed of output shaft, rpm

Watch out for thrown objects and ricochets.

The operator of the machine must ensure, while working, that no persons or animals come closer than 15 metres.

Machines fitted with saw blades or grass blades can be thrown violently to the side when the blade comes into contact with a fixed object. The blade is capable of amputating an arm or leg. Always keep people and animals at least 15 metres from the machine.

Arrows which show limits for handle positioning.

Always wear approved protective gloves.

Wear sturdy, non-slip boots.

Only use non-metallic, flexible cutting attachments, i.e. trimmer heads with trimmer cord.

Noise emission to the environment according to the European Community's Directive. The machine's emission is specified in chapter Technical data and on label.

Other symbols/decals on the machine refer to special certification requirements for certain markets.

	Switch off the engine by moving the stop switch to the STOP position before carrying out any checks or maintenance.
	Always wear approved protective gloves.
	Regular cleaning is required.
	Visual check.
	Approved eye protection must always be used.

Note the following before starting:
Husqvarna AB has a policy of continuous product development and therefore reserves the right to modify the design and appearance of products without prior notice.
Long-term exposure to noise can result in permanent hearing impairment. So always use approved hearing protection.

Under no circumstances may the design of the machine be modified without the permission of the manufacturer. Always use genuine accessories. Non-authorized modifications and/or accessories can result in serious personal injury or the death of the operator or others.

A clearing saw, brushcutter or trimmer can be dangerous if used incorrectly or carelessly, and can cause serious or fatal injury to the operator or others. It is extremely important that you read and understand the contents of this operator's manual.

SAFETY INSTRUCTIONS

Personal protective equipment

Whenever you use a clearing saw, brushcutter or trimmer you must wear personal protective equipment that is approved by the authorities. Personal protective equipment does not eliminate the risk of accidents, but it can reduce the effects of an injury in the event of an accident. Ask your dealer for help when choosing protective equipment.

Listen out for warning signals or shouts when you are wearing hearing protection. Always remove your hearing protection as soon as the engine stops.

HELMET
A helmet should be worn if the trees being cleared are taller than 2 m.

HEARING PROTECTION
Wear hearing protection that provides adequate noise reduction.

EYE PROTECTION
Always wear approved eye protection. If you use a visor then you must also wear approved protective goggles. Approved protective goggles must comply with standard ANSI Z87.1 in the USA or EN 166 in EU countries. Visors must comply with standard EN 1731.

GLOVES
Gloves should be worn when necessary, e.g., when fitting cutting attachments.

BOOTS
Wear sturdy, non-slip boots.

CLOTHING
Wear clothes made of a strong fabric and avoid loose clothing that can catch on twigs and branches. Always wear heavy, long pants. Do not wear jewellery, shorts sandals or go barefoot. Secure hair so it is above shoulder level.

FIRST AID KIT
Always have a first aid kit nearby.

Machine's safety equipment
This section describes the machine's safety equipment, its purpose, and how checks and maintenance should be carried out to ensure that it operates correctly. See the "What is what?" section to locate where this equipment is positioned on your machine.
The life span of the machine can be reduced and the risk of accidents can increase if machine 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 service workshop.

Never use a machine that has faulty safety equipment! Carry out the inspection, maintenance and service routines listed in this section.

Throttle lock
The throttle lock is designed to prevent accidental operation of the throttle control. When you press the lock (A) (i.e. when you grasp the handle) it releases the throttle control (B). When you release the handle the throttle control and the throttle lock both move back to their original positions. This movement is controlled by two independent return springs. This arrangement means that the throttle control is automatically locked at the idle setting.

Stop switch
Use the stop switch to switch off the engine.

Cutting attachment guard
This guard is intended to prevent loose objects from being thrown towards the operator. The guard also protects the operator from accidental contact with the cutting attachment.


Never use a cutting attachment without an approved guard. See the chapter on Technical data. If an incorrect or faulty guard is fitted this can cause serious personal injury.

Vibration damping system
Your machine is equipped with a vibration damping system that is designed to minimise vibration and make operation easier.

Using incorrectly wound cord or a blunt or incorrect cutting attachment (wrong type or incorrectly filed, see instructions under the heading Filing the blade) increases the level of vibration.
The machine's vibration damping system reduces the transfer of vibration between the engine unit/cutting equipment and the machine's handle unit.


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. Such symptoms include numbness, loss of feeling, tingling, pricking, pain, loss of strength, changes in skin colour or condition. These symptoms normally appear in the fingers, hands or wrists. The risk increases at low temperatures.

Quick release
There is an easily accessible, quick release fitted at the front as a safety precaution in case the engine catches fire, or in any other situation that requires you to free yourself from the machine and harness. See instructions under the heading Adjusting the harness and clearing saw.

Muffler
The muffler is designed to keep noise levels to a minimum and to direct exhaust fumes away from the user.
A muffler fitted with a catalytic converter is also designed to reduce harmful exhaust gases.

In countries that have a warm and dry climate there is a significant risk of fire. We therefore fit certain mufflers with a spark arrestor mesh. Check whether the muffler on your machine is fitted with this kind of mesh.

For mufflers it is very important that you follow the instructions on checking, maintaining and servicing your machine. See instructions under the heading Checking, maintaining and servicing the machine's safety equipment.

Mufflers fitted with catalytic converters get very hot during use and remain so for some time after stopping. This also applies at idle speed. Contact can result in burns to the skin. Remember the risk of fire!

The inside of muffler contain chemicals that may be carcinogenic. Avoid contact with these elements in the event of a damaged muffler.

Bear in mind that: Engine exhaust fumes contain carbon monoxide, which can cause carbon monoxide poisoning. For this reason you should not start or run the machine indoors, or anywhere that is poorly ventilated. The exhaust fumes from the engine are hot and may contain sparks which can start a fire. Never start the machine indoors or near combustible material!

Cutting equipment
Saw blades are intended for cutting fibrous types of wood.

Grass blades and grass cutters are intended for cutting coarse grass.

A trimmer head is intended for trimming grass.

Locking nut
A locking nut is used to secure some types of cutting attachment.

Checking, maintaining and servicing the machine's safety equipment

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.

Throttle lock

• Make sure the throttle control is locked at the idle setting when the throttle lock is released.
  
• Press the throttle lock and make sure it returns to its original position when you release it.
  
• Check that the throttle control and throttle lock move freely and that the return springs work properly.
  
  The throttle lock is designed to prevent accidental operation of the throttle control. When you press the lock (A) (i.e. when you grasp the handle) it releases the throttle control (B). When you release the handle the throttle control and the throttle lock both move back to their original positions. This movement is controlled by two independent return springs. This arrangement means that the throttle control is automatically locked at the idle setting.
  
• See instructions under the heading Start. Start the machine and apply full throttle. Release the throttle and check that the cutting attachment stops and remains at a standstill. If the cutting attachment rotates with the throttle in the idle position then the carburettor idle setting must be checked. See instructions under the heading Maintenance.
  

Stop switch

• Start the engine and make sure the engine stops when you move the stop switch to the stop setting.
  

Cutting attachment guard

• Ensure that the guard is undamaged and is not cracked.
• Replace the guard if it has been exposed to impact or is cracked.
• Always use the recommended guard for the cutting attachment you are using. See chapter on Technical data.
  

Vibration damping system

• Regularly check the vibration damping units for cracks or deformation.
  

• Check that the vibration damping element is undamaged and securely attached.
  

The nylon lining inside the locking nut must not be so worn that you can turn it by hand. The lining should offer a resistance of at least 1.5 Nm. The nut should be replaced after it has been put on approx. 10 times.

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

Cutting equipment

This section describes how to choose and maintain your cutting equipment in order to:
Reduce the risk of kickback.
Obtain maximum cutting performance.
Extend the life of cutting equipment.
Only use cutting attachments with the guards we recommend! See the chapter on Technical data.
Refer to the instructions for the cutting attachment to check the correct way to load the cord and the correct cord diameter.
Keep the teeth of the blade correctly sharpened! Follow our recommendations. Also refer to the instructions on the blade packaging.
Maintain the correct blade setting! Follow our instructions and use the recommended file gauge.

Using an incorrect cutting attachment or an incorrectly sharpened blade increases the risk of kickback.

• See the cutting attachment packaging for correct
• A correctly filed blade is essential for working efficiently and to avoid unnecessary wear to the blade and clearing
• Make sure that the blade is well supported when you file it. Use a 5.5 mm round file with a file holder.
  
• The filing angle is 15°. File alternate teeth to the right and those in between to the left. If the blade has been heavily pitted by stones it may be necessary to dress the top so, this should be done before filing with a round file. The top edges must be filed down by the same amount for all the teeth.
  
• Adjust the blade setting. This should be 1 mm.
  

Sharpening grass cutters and grass blades

• See the cutting attachment packaging for correct sharpening instructions.
• Sharpen blades and cutters using a single-cut flat file.
• Sharpen all edges equally to maintain the balance of the blade.
  

Trimmer head

• Only use the recommended trimmer heads and trimmer cords. These have been tested by the manufacturer to suit a particular engine size. This is especially important when a fully automatic trimmer head is used. Only use the recommended cutting attachment. See the chapter on Technical data.
  
• Smaller machines generally require small trimmer heads and vice versa. This is because when clearing using a cord the engine must throw out the cord radially from the trimmer head and overcome the resistance of the grass being cleared.
• The length of the cord is also important. A longer cord requires greater engine power than a shorter cord of the same diameter.
• Make sure that the cutter on the trimmer guard is intact. This is used to cut the cord to the correct length.
• To increase the life of the cord it can be soaked in water for a couple of days. This will make the line tougher so that it lasts longer.

Always ensure the trimmer cord is wound tightly and evenly around the drum, otherwise the machine will generate harmful vibration.

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

• Always use a fuel container with an anti-spill valve.
• Never refuel the machine while the engine is running. Always stop the engine and let it cool for a few minutes before refuelling.
• Make sure there is plenty of ventilation when refuelling or mixing fuel (petrol and 2-stroke oil).
• Move the machine at least 3 m from the refuelling point before starting it.
• Never start the machine:
  1. If you have spilt fuel on it. Wipe off the spillage and allow remaining fuel to evaporate.
  2. If you have spilt fuel on yourself or your clothes, change your clothes. Wash any part of your body that has come in contact with fuel. Use soap and water.
  3. If the machine is leaking fuel. Check regularly for leaks from the fuel cap and fuel lines.
  4. Avoid all skin contact with fuel. Fuel is a skin irritant and may even cause skin changes.
     

WHAT IS WHAT?

What is what on the clearing saw?

1. Blade
2. Grease filler cap
3. Bevel gear
4. Cutting attachment guard
5. Shaft
6. Handlebar
7. Throttle control
8. Stop switch
9. Throttle lock
10. Hanging ring
11. Cylinder cover
12. Starter handle
13. Fuel tank
14. Choke control
15. Air purge
16. Air filter cover
17. Clutch cover
18. Handle adjustment
19. Locking nut
20. Support flange
21. Support cup
22. Drive disc
23. Trimmer head
24. Socket spanner
25. Operator's manual
26. Transport guard
27. Allen key
28. Locking pin
29. Harness
30. Shaft coupling
31. Start throttle button
32. Part throttle dial
33. Adjusting the throttle wire

ASSEMBLY

Fitting the handlebar
(323R)

• Remove the screw at the rear of the throttle handle.
• Slide the throttle handle onto the right side of the handlebar, (see diagram).
  
• Align the screw hole in the throttle handle with the hole in the handlebar.
• Refit the screw in the hole in the rear of the throttle handle.
• Screw the screw through the handle and handlebar. Tighten it.
• Fit the mounting components as shown.
  
• The handle mounting must be fitted between the arrows on the shaft.
• Loosely tighten the four screws.
• Put on the harness and hang the machine from the support hook. Now make a final adjustment so that the machine is in a comfortable working position when it hangs from the harness.
  Tighten the screws.
  

Fitting the handlebar
(325Rx, 325RDx)

• Remove the screw at the rear of the throttle handle.
• Slide the throttle handle onto the right side of the handlebar, (see diagram).
  
• Align the screw hole in the throttle handle with the hole in the handlebar.
• Refit the screw in the hole in the rear of the throttle handle.
• Screw the screw through the handle and handlebar. Tighten it.
• Unscrew the knob from the handlebar mounting.
• Position the handlebar as shown. Fit the mounting components and tighten the knob lightly.
  
• Put on the harness and hang the machine from the support hook. Now make a final adjustment so that the machine is in a comfortable working position when it hangs from the harness. Tighten the knob.
  

Transport position, handlebar
(325Rx, 325RDx)

• The handlebar can easily be turned to fit along the shaft for easier transportation and storage.
• Loosen the knob. Turn the handlebar clockwise so that the throttle handle rests against the engine.
• Now twist the handlebar around the shaft. Tighten the knob.
  
• Fit the transport guard to the cutting attachment.

Fitting blades and trimmer heads

• When fitting the cutting attachment it is extremely important that the raised section on the drive disc/support flange engages correctly in the centre hole of the cutting attachment. If the cutting attachment is fitted incorrectly it can result in serious and/or fatal personal injury.
  

Never use a cutting attachment without an approved guard. See the chapter on Technical data. If an incorrect or faulty guard is fitted this can cause serious personal injury.

If a saw blade or grass blade are to be used the machine must be equipped with the correct handlebar, blade guard and harness.

Fitting the blade guard and saw blade

Fitting a trimmer guard and Superauto II trimmer head

• Fit the correct trimmer guard (A) for use with the trimmer head. Hook the trimmer guard/combination guard onto the fitting on the shaft and secure with the bolt (L).
• Fit the drive disc (B) on the output shaft.
• Turn the blade shaft until one of the holes in the drive disc aligns with the corresponding hole in the gear housing.
• Insert the locking pin (C) in the hole to lock the shaft.
• To fit the trimmer head, first separate the two halves (see diagram). Proceed as follows: - Insert a finger into the centre hole of the cover (I) while grasping the cover with your other fingers. Using the index finger and thumb of your other hand, release the two catches (J) that engage in the cut-outs in the bottom half (K). Pull apart the trimmer head, grasping the cover firmly.
• Place the cover (I) and the support flange (F) on the output shaft.
• Fit the nut (G). Tighten the nut to a torque of 35-50 Nm (3.5-5 kpm). Use the socket spanner in the tool kit. Grasp the handle of the spanner as close to the trimmer guard as possible.
• To tighten the nut, turn the spanner in the opposite direction to the direction of rotation (left-hand thread).
  

Fitting other guards and cutting attachments

• Fit the trimmer guard/combination guard (A) intended for use with the trimmer head/plastic blades.
  Hook the guard onto the fitting on the shaft and secure it with the bolt (L).
  
• Fit the drive disc (B) on the output shaft.
• Turn the blade shaft until one of the holes in the drive disc aligns with the corresponding hole in the gear housing.
• Insert the locking pin (C) in the hole to lock the shaft.
  
• Screw on the trimmer head/plastic blades (H) in the opposite direction to the direction of rotation.
  
• To dismantle, follow the instructions in the reverse order.

Assembling and dismantling the two-piece shaft
(325RDx)

Assembly:

• Make sure the knob is loose.
• Align the cut-out in the lower part of the shaft with the coupling locking tab on the upper part of the shaft. Then lock the sections together.
  

• Tighten the knob.
  

Dismantling:

• Undo the knob (at least three turns).
  
• Push the knob towards the coupling.
• Carefully twist the lower half of the shaft to unlock it.
• Hold both parts of the shaft and pull the lower part of the shaft out of the coupling.
  

FUEL HANDLING

Fuel

The machine is equipped with a two-stroke engine and must always been run using a mixture of petrol and twostroke engine oil. It is important to accurately measure the amount of oil to be mixed to ensure that the correct mixture is obtained. When mixing small amounts of fuel, even small inaccuracies can drastically affect the ratio of the mixture.

Always ensure there is adequate ventilation when handling fuel.

Petrol


Always use a good quality petrol/oil mixture (at least 90 octane). If your machine is equipped with a catalytic converter (see chapter on Technical data) always use a good quality unleaded petrol/oil mixture. Leaded petrol will destroy the catalytic converter.
Use low-emission petrol, also known as alkylate petrol, if it is available.

• The lowest recommended octane rating is 90. If you run the engine on a petrol with a lower octane rating than 90 this can cause knocking. This leads to an increased engine temperature, which can result in serious engine damage.
• When working at continuous high revs a higher octane rating is recommended.

Two-stroke oil

• For best results and performance use HUSQVARNA twostroke oil, which is specially formulated for our two-stroke engines. Mixture 1:50 (2%).
• If HUSQVARNA two-stroke oil is not available, you may use another two-stroke oil of good quality that is intended for air cooled engines. Contact your dealer when selecting an oil. Mixing ratio 1:33 (3%).
• Never use two-stroke oil intended for water-cooled outboard engines, sometimes referred to as outboard oil.
• Never use oil intended for four-stroke engines.

  Petrol, litre	Two-stroke oil, litre
  	2% (1:50)	3% (1:33)
  5	0,10	0,15
  10	0,20	0,30
  15	0,30	0,45
  20	0,40	0,60

STARTING AND STOPPING

Check before starting

• Check the blade to ensure that no cracks have formed at the bottom of the teeth or by the centre hole. The most common reason why cracks are formed is that sharp corners have been formed at the bottom of the teeth while sharpening or that the blade has been used with dull teeth. Discard a blade if cracks are found.
  
• Check that the support flange is not cracked due to fatigue or due to being tightened too much. Discard the support flange if it is cracked.
  
• Ensure the locking nut has not lost its captive force. The nut lock should have a locking force of at least 1.5 Nm. The tightening torque of the locking nut should be 35-50 Nm.
  
• Check that the blade guard is not damaged or cracked. Replace the blade guard if it is exposed to impact or is cracked.
  
• Check that the trimmer head and trimmer guard are not damaged or cracked. Replace the trimmer head or trimmer guard if they have been exposed to impact or are cracked.
  
• Never use the machine without a guard nor with a defective guard.

Starting and stopping


The complete clutch cover and shaft must be fitted before the machine is started, otherwise the clutch can come loose and cause personal injury. Always move the machine away from the refuelling area before starting. Place the machine on a flat surface. Ensure the cutting attachment cannot come into contact with any object. Make sure no unauthorised persons are in the working area, otherwise there is a risk of serious personal injury. The safety distance is 15 metres.

Cold engine
Ignition: Set the stop switch to the start position.
Choke: Set the choke control in the choke position.

Air purge:
Press the air purge diaphragm repeatedly until fuel begins to fill the diaphragm. The diaphragm need not be completely filled.

Warm engine
Ignition: Set the stop switch to the start position.
Choke: Set the throttle to the start position by moving the choke control to the choke position and then returning it to its original position.

Air purge: Press the air purge diaphragm repeatedly until fuel begins to fill the diaphragm. The diaphragm need not be completely filled.

For throttle handles with a start throttle lock:
Set the throttle to the start position by first pressing the throttle lock and the throttle trigger, then pressing the start throttle button (A). Then release the throttle lock and the throttle trigger, followed by the start throttle button. The throttle function is now activated. To return the engine to idle, press the throttle lock and throttle trigger again.

PART THROTTLE FUNCTION (RX, RXT, RDX):
It is possible to set the engine for part throttle operation using the dial on the side of the throttle handle. Turn the dial up to decrease the part throttle rpm. Turn the dial down to increase the part throttle rpm. When you have set the part throttle rpm you will feel increased resistance when you press the throttle trigger. This increased resistance makes it easier to maintain a constant part throttle setting. To obtain full throttle, press the throttle trigger a little harder so that it goes past the part throttle setting. As soon as you release the throttle trigger the engine will return to idle. The part throttle function does not lock the engine at a given rpm, it is simply a brake that makes it easier to maintain the engine at a given rpm.

Stopping

Stop the engine by switching off the ignition.


When the engine is started with the choke in either the choke or start throttle positions the cutting attachment will start to rotate immediately.

Starting

Stop the engine by switching off the ignition.
Hold the body of the machine on the ground using your left hand
(
Not with your foot!). Grip the starter handle, slowly pull out the cord with your right hand until you feel some resistance (the starter pawls grip), now quickly and powerfully pull the cord.
Reset the choke control as soon as the engine fires and repeat until the engine starts. When the engine starts, quickly apply full throttle; the throttle will automatically disengage from the start setting.

Do not pull the starter cord all the way out and do not let go of the starter handle when the cord is fully extended. This can damage the machine.

MAINTENANCE

Carburettor
Your Husqvarna product has been designed and manufactured to specifications that reduce harmful emissions. After the engine has used 8-10 tanks of fuel the engine will be run-in. To ensure that it continues to run at peak performance and to minimise harmful exhaust emissions after the running-in period, ask your dealer/service workshop (who will have a rev counter at their disposal) to adjust your carburettor.

The complete clutch cover and shaft must be fitted before the machine is started, otherwise the clutch can come loose and cause personal injury.

Function

• The carburettor governs the engine's speed via the throttle control. Air and fuel are mixed in the carburettor. The air/fuel mixture is adjustable. Correct adjustment is essential to get the best performance from the machine.
• Adjusting the carburettor means that the engine is adapted to local operating conditions, e.g. climate, altitude, petrol and the type of 2-stroke oil.
• The carburettor has three adjustment controls:
  L = Low speed jet
  H = High speed jet
  
• The L and H-jets are used to adjust the supply of fuel to match the rate that air is admitted, which is controlled with the throttle. If they are screwed clockwise the air/fuel ratio becomes leaner (less fuel) and if they are turned anticlockwise the ratio becomes richer (more fuel). A lean mixture gives a higher engine speed and a rich mixture gives a lower engine speed.
• The T-screw regulates the throttle setting at idle speed. If the T-screw is turned clockwise this gives a higher idle speed; turning it anti-clockwise gives a lower idle speed.

Basic setting

• The basic carburettor settings are adjusted during testing at the factory. The basic setting is richer than the optimal setting and should be maintained for the first few hours the machine is in use. The carburettor should then be finely adjusted. Fine adjustment should be carried out by a skilled technician.

If the cutting attachment rotates when the engine is idling the idle adjustment screw T should be turned anti-clockwise until the cutting attachment stops.
Rec. idle speed 2700 rpm
Recommended max. speed: See the Technical data section.

If the idle speed cannot be adjusted so that the cutting attachment stops, contact your dealer/service workshop. Do not use the machine until it has been correctly adjusted or repaired.

Fine adjustment

• When the machine has been "run-in" the carburettor should be finely adjusted. The fine adjustment should be carried out by a qualified person. First adjust the L-jet, then the idling screw T and then the H-jet.

Conditions

• Before any adjustments are made, make sure that the air filter is clean and the air filter cover is fitted. If you adjust the carburettor when the air filter is dirty it will result in a leaner mixture when the filter is finally cleaned. This can lead to serious engine damage.
• Carefully turn both jets, L and H, so that they are midway between fully screwed in and fully screwed out.
• Do not attempt to adjust the L and H jets beyond either stop as this could cause damage.
• Now start the machine according to the starting instructions and let it warm up for 10 minutes.

If the cutting attachment rotates when the engine is idling the idle adjustment screw T should be turned anti-clockwise until the cutting attachment stops.

Low speed jet L
Try to find the highest idle speed by turning the low speed jet L clockwise then anti-clockwise. When the highest speed has been found, turn the low speed jet L 1/4 turn anti-clockwise.


If the cutting attachment rotates when the engine is idling the idle adjustment screw T should be turned anticlockwise until the cutting attachment stops.

Fine adjustment of the idle speed T
Adjust the idle speed using the idle adjustment screw T, if it is necessary to readjust. First turn the idle adjustment screw T clockwise until the cutting attachment starts to rotate. Then turn the screw anticlockwise until the cutting attachment stops. The idle speed is correctly adjusted when the engine will run smoothly in every position. The idle speed should also be well below the speed at which the cutting attachment starts to rotate.


If the idle speed cannot be adjusted so that the cutting attachment stops, contact your dealer/service workshop. Do not use the machine until it has been correctly adjusted or repaired.

High speed jet H
The high speed jet H affects the engine power, speed, temperature and fuel consumption. If the high speed jet H is set too lean (screwed in too far) the engine speed will be too high and cause engine damage. Do not let the engine run at full speed for more than 10 seconds.

Apply full throttle and turn the high speed jet H very slowly clockwise until the engine slows down. Then turn the high speed jet H very slowly anticlockwise until the engine starts to run unevenly. Now turn the high speed jet H slowly clockwise a little way until the engine runs smoothly.
Note that the engine should not be under load when you adjust the high speed jet H. You should therefore remove the cutting attachment, nut, support flange and drive disc before adjusting the high speed jet H.
The high speed jet H is adjusted correctly when the machine burbles a little. If the machine races then the setting is too lean. If the engine produces a lot of smoke and burbles a lot then the setting is too rich.


For optimum adjustment of the carburettor, contact a qualified dealer/service workshop that has a revolution counter at their disposal.

Correctly adjusted carburettor
When the carburettor is correctly adjusted the machine will accelerate without hesitation and burble a little at maximum speed. It is also important that the cutting attachment does not rotate at idle. If the low speed jet L is set too lean it may cause starting difficulties and poor acceleration.
If the high speed jet H is set too lean it will result in less power, less performance, poor acceleration and/or damage to the engine.
If both the L and H jets are set too rich it will results in acceleration problems or too low a working speed.

Adjusting the start throttle speed
The correct start throttle speed is set by means of an adjuster on the rear of the handle next to the cable. Use this screw (4 mm Allen screw) to increase or decrease the start throttle speed.

Proceed as follows:

1. Run the machine at idle.
2. Press the start throttle lock as described under the heading Starting and stopping.
3. If the start throttle speed is too low (below 4000 rpm), turn the adjuster screw A clockwise until the cutting attachment starts to rotate. Then turn A clockwise a further 1/2 turn.
4. If the start throttle speed is too high, turn the adjuster screw A anticlockwise until the cutting attachment stops. Then turn adjuster screw A clockwise a further 1/2 turn.

If the idle speed cannot be adjusted so that the cutting attachment stops, contact your dealer/service workshop. Do not use the machine until it has been correctly adjusted or repaired.

Muffler


Some mufflers are fitted with a catalytic converter. See chapter on Technical data to see whether your machine is fitted with a catalytic converter.
The muffler is designed to reduce the noise level and to direct the exhaust gases away from the operator. The exhaust gases are hot and can contain sparks, which may cause fire if directed against dry and combustible material.

Some mufflers are equipped with a special spark arrestor mesh. If your machine has this type of muffler, you should clean the mesh at least once a week. This is best done with a wire brush. On mufflers without a catalytic converter the mesh should be cleaned weekly, or replaced if necessary. On mufflers fitted with a catalytic converter the mesh should be checked, and if necessary cleaned, monthly. If the mesh is damaged it should be replaced.
If the mesh is frequently blocked, this can be a sign that the performance of the catalytic converter is impaired. Contact your dealer to inspect the muffler. A blocked mesh will cause the machine to overheat and result in damage to the cylinder and piston.


Never use a machine with a defective muffler.

Mufflers fitted with catalytic converters get very hot during use and remain so for some time after stopping. This also applies at idle speed. Contact can result in burns to the skin. Remember the risk of fire!

Bevel gear
The bevel gear is filled with the right quantity of grease at the factory. However, before using the machine you should check that the bevel gear is filled three-quarters full with grease. Use HUSQVARNA special grease.

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

Two-piece shaft
The drive shaft end in the lower shaft should be lubricated with grease every 30 hours. There is a risk that the drive shaft ends (splined coupling) on models with two-piece shafts will seize if they are not lubricated regularly.

Air filter

The air filter must be regularly cleaned to remove dust and dirt in order to avoid:

• Carburettor malfunctions
• Starting problems
• Loss of engine power
• Unnecessary wear to engine parts
• Excessive fuel consumption.
  

Clean the filter every 25 hours, or more regularly if conditions are exceptionally dusty.

Cleaning the air filter
Remove the air filter cover and take out the filter. Wash it clean in warm, soapy water. Ensure that the filter is dry before refitting it.
An air filter that has been in use for a long time cannot be cleaned completely. The filter must therefore be replaced with a new one at regular intervals. A damaged air filter must always be replaced.
If the machine is used in dusty conditions the air filter should be soaked in oil. See instructions under the heading Oiling the air filter.

Oiling the air filter

Always use HUSQVARNA filter oil, art. no. 503 47 73-01. The filter oil contains a solvent to make it spread evenly through the filter. You should therefore avoid skin contact.
Put the filter in a plastic bag and pour the filter oil over it. Knead the plastic bag to distribute the oil. Squeeze the excess oil out of the filter inside the plastic bag and pour off the excess before fitting the filter to the machine. Never use common engine oil. This would drain through the filter quite quickly and collect in the bottom.

Spark plug

The spark plug condition is influenced by:

• Incorrect carburettor adjustment.
• An incorrect fuel mixture (too much or incorrect type of oil).
• A dirty air filter.

These factors cause deposits on the spark plug electrodes, which may result in operating problems and starting difficulties. If the machine is low on power, difficult to start or runs poorly at idle speed: always check the spark plug first before taking any further action. If the spark plug is dirty, clean it and check that the electrode gap is 0.5 mm. The spark plug should be replaced after about a month in operation or earlier if necessary.

Always use the recommended spark plug type!
Use of the wrong spark plug can damage the piston/cylinder.

Sharpening grass cutters and grass


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

• See the cutting attachment packaging for correct sharpening instructions.
• Sharpen blades and cutters using a single-cut flat file.
• Sharpen all edges equally to maintain the balance of the blade.
  

Always discard a blade that is bent, twisted, cracked, broken or damaged in any other way. Never attempt to straighten a twisted blade so that it can be reused. Only use original blades of the specified type.

Filing the saw blade


Using an incorrect cutting attachment or an incorrectly sharpened blade increases the risk of kickback.

• See the cutting attachment packaging for correct sharpening instructions.
• A correctly filed blade is essential for working efficiently and to avoid unnecessary wear to the blade and clearing saw.
• Make sure that the blade is well supported when you file it. Use a 5.5 mm round file with a file holder.
  
• The filing angle is 15°. File alternate teeth to the right and those in between to the left. If the blade has been heavily pitted by stones it may be necessary to dress the top edges of the teeth with a flat file, in exceptional cases. If so, this should be done before filing with a round file. The top edges must be filed down by the same amount for all the teeth.
  
• Adjust the blade setting. This should be 1 mm.
  

Maintenance schedule
Below you will find some general maintenance instructions. If you need further information please contact your service workshop.

Daily maintenance

1. Clean the outside of the machine.
   
2. Check that the harness is not damaged.
   
3. Check that the components of the throttle control work safely. (Throttle lock and throttle control.)
   
4. Check that the stop switch works correctly.
   
5. Check that the cutting attachment does not rotate at idle.
   
6. Clean the air filter. Replace if necessary.
   
7. Check that the guard is undamaged and not cracked. Replace the guard if it has been exposed to impact or is cracked.
   
8. Check that the blade is correctly centred, is sharp, and is not cracked. An off-centre blade will cause vibration that could result in damage to the machine.
   
9. Check that the trimmer head is undamaged and not cracked. Replace the trimmer head if necessary.
   
10. Check that the locking nut is tight.
    
11. Check that the transport guard for the blade is intact and that it can be secured correctly.
    
12. Check that nuts and screws are tight.
    
13. Check that there are no fuel leaks from the engine, tank or fuel lines.
    

Weekly maintenance

1. Check the starter and starter cord.
   
2. Check that the vibration damping elements are not damaged.
   
3. Clean the outside of the spark plug. Remove it and check the electrode gap. Adjust the gap to 0.5 mm or replace the spark plug. Check that the spark plug is fitted with a suppressor.
   
4. Clean the cooling fins on the flywheel.
   
5. Clean or replace the spark arrestor mesh on the muffler (only applies to mufflers without a catalytic converter).
   
6. Clean the carburettor compartment.
   
7. Clean the cooling fins on the cylinder and check that the air intake near the starter is not blocked.
   
8. Check that the bevel gear is filled three-quarters full with lubricant. Fill if necessary using special grease.
   

Monthly maintenance

1. Clean the fuel tank.
   
2. Clean the outside of the carburettor and the space around it.
   
3. Clean the fan and the area around it.
   
4. Check the fuel filter and the fuel hose. Replace if necessary.
   
5. Check all cables and connections.
   
6. Check the clutch, clutch springs and the clutch drum for wear. Replace if necessary.
   
7. Replace the spark plug. Check that the spark plug is fitted with a suppressor.
   
8. Check and clean the spark arrestor mesh on the muffler (only applies to mufflers fitted with a catalytic converter).
   

Technical data

Note 1: Noise emissions in the environment measured as sound power (L_WA) in conformity with EC directive 2000/14/EC.
Note 2: Equivalent sound pressure level is calculated as the time-weighted energy total for sound pressure levels under various working conditions with the following time distribution: 1/2 idling and 1/2 max speed.
NOTE!
The noise pressure level at operator's ear and vibrations on the handles are measured with all the approved cutting attachments for the machine. The table indicates the lowest and highest values.