Operators manual (EPA II)
Please read the operators manual carefully and make sure you understand the instructions before using the machine.

English

KEY TO SYMBOLS

Key to symbols

WARNING! Chain saws can be dangerous! Careless or incorrect use can result in serious or fatal injury to the operator or others. Please read the operators manual carefully and make sure you understand the instructions before using the machine. Always wear: Approved protective helmet Approved hearing protection Protective goggles or a visor Refuelling.
Filling with oil and adjusting oil ow.
Other symbols/decals on the machine refer to special certication requirements for certain markets.
Both of the operators hands must be used to operate the chain saw. Please see page 30 in your "Chain saw operators safety manual". Never operate a chain saw holding it with one hand only. Please see page 30 in your "Chain saw operators safety manual".
Contact of the guide bar tip with any object should be avoided. Please see pages 12-21 in your "Chain saw operators safety manual". Tip contact may cause the guide bar to move suddenly upward and backward, which may cause serious injury. Please see pages 1221 in your "Chain saw operators safety manual". 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.

Protective goggles or a visor must be worn.

2 English

CONTENTS

Contents

KEY TO SYMBOLS Key to symbols... CONTENTS Contents... Before using a new chain saw.. SAFETY INSTRUCTIONS Personal protective equipment.. Machines safety equipment.. Checking, maintaining and servicing the machines safety equipment... Cutting equipment... How to avoid kickback.. General safety precautions.. General working instructions.. WHAT IS WHAT? What is what on the chain saw?.. ASSEMBLY Fitting the bar and chain... FUEL HANDLING Fuel... STARTING AND STOPPING Starting and stopping... MAINTENANCE Carburettor.. Starter... Air lter... Spark plug... Mufer... Needle bearing lubrication.. Adjustment of the oil pump.. Cooling system.. Air Injection centrifugal cleaning.. Winter use... Daily maintenance.. Weekly maintenance.. Monthly maintenance... TECHNICAL DATA Technical data.. FEDERAL EMISSION CONTROL WARRANTY STATEMENT YOUR WARRANTY RIGHTS AND OBLIGATIONS.. 33 34
Before using a new chain saw
Please read the operators manual carefully. Check that the cutting equipment is correctly tted and adjusted. See instructions under the heading Assembly. Refuel, start the chain saw and check the carburettor settings. See the instructions under the headings Fuel Handling, Starting and Stopping, and Carburettor. Do not use the chain saw until sufcient chain oil has reached the chain. See instructions under the heading Lubricating cutting equipment.
IMPORTANT! If the carburettor mixture is too lean it greatly increases the risk of engine failure. Poor maintenance of the air lter will cause carbon build-up on the spark plug and lead to starting difculties. If the chain is improperly adjusted it will cause increased wear or damage to the bar, drive sprocket and chain. Maintenance, replacement, or repair of the emission control devices and system may be performed by any nonroad engine repair establishment or individual.
WARNING! Under no circumstances may the design of the machine be modied without the permission of the manufacturer. Always use genuine accessories. Non-authorized modications and/or accessories can result in serious personal injury or the death of the operator or others. Your warranty may not cover damage or liability caused by the use of nonauthorized accessories or replacement parts. WARNING! A chain saw is a dangerous tool if used carelessly or incorrectly and can cause serious, even fatal injuries. It is very important that you read and understand the contents of this operators manual. WARNING! The inside of the mufer contain chemicals that may be carcinogenic. Avoid contact with these elements in the event of a damaged mufer. WARNING! Long term inhalation of the engines exhaust fumes, chain oil mist and dust from sawdust can represent a health risk.

The chain brake (A) can either be activated manually (by your left hand) or automatically by the inertia release mechanism (a pendulum that swings independently of the chain saw. On most of our models the front hand guard acts as a counterweight in case of kickback). The brake is applied when the front hand guard (B) is pushed forwards.
To release the chain brake pull the front hand guard backwards, towards the front handle.
Kickback can be very sudden and violent. Most kickbacks are minor and do not always activate the chain brake. If this happens you should hold the chain saw rmly and not let go.
This movement activates a spring-loaded mechanism that tightens the brake band (C) around the engine drive system (D) (clutch drum).
The front hand guard is not designed solely to activate the chain brake. Another important feature is that it reduces the risk of the chain hitting your left hand if you lose grip of the front handle.
The way the chain brake is activated, either manually or automatically by the inertia release mechanism, depends on the force of the kickback and the position of the chain saw in relation to the object that the kickback zone of the bar strikes. If you get a violent kickback while the kickback zone of the bar is farthest away from you the chain brake will be activated by the movement of the counterweight (inertia activated) in the kickback direction.
The chain brake must be engaged when the chain saw is started.
If the kickback is less violent or the kickback zone of the bar is closer to you the chain brake will be activated manually by the movement of your left hand.
During felling your left hand grasps the front handle in such a way that it cannot activate the chain brake. In this position, i.e. when your left hand is in such a position that it cannot affect the movement of the front hand guard, the chain brake can only be activated by the inertia of the counterweight.
Your machine is equipped with a vibration damping system that is designed to minimize vibration and make operation easier.
When you use a chain saw, vibration is generated by the uneven contact between the chain and the wood you are cutting. The inertia activated chain brake is a valuable feature but there are certain factors to remember (see point above).

Checking the front hand guard
WARNING! The exhaust fumes from the engine are hot and may contain sparks which can start a re. Never start the machine indoors or near combustible material!
Move the front hand guard forwards and back to make sure it moves freely and that it is securely anchored to the clutch cover.
In areas with a hot, dry climate there is a high risk of res. These areas are sometimes controlled by legislation and requirements that among other things the mufer must be equipped with an approved type of spark arrestor mesh. For mufers 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 machines safety equipment.
Checking the inertia brake release
WARNING! The mufer gets very hot in use and remains so for a short time afterwards. Do not touch the mufer if it is hot!
Checking, maintaining and servicing the machines safety equipment
Hold the chain saw over a stump or other rm object. Let go of the front handle so that the bar drops towards the stump as the chain saw rotates around the rear handle.
WARNING! All servicing and repair work on the machine requires special training. This is especially true of the machines 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.
When the bar hits the stump the brake should be applied.
Checking brake band wear Checking the brake trigger
Brush off any wood dust, resin and dirt from the chain brake and clutch drum. Dirt and wear can impair operation of the brake. Place the chain saw on rm ground and start it. Make sure the chain does not touch the ground or any other object. See the instructions under the heading Start and stop.
Regularly check that the brake band is at least 0.6 mm thick at its thinnest point.
Grasp the chain saw rmly, wrapping your ngers and thumbs around the handles.
Check that the chain catcher is not damaged and is rmly attached to the body of the chain saw.

Chain pitch (inches). The spacing between the drive links of the chain must match the spacing of the teeth on the bar tip sprocket and drive sprocket.

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Sharpening your chain and adjusting raker clearance
It is very difcult to sharpen a chain correctly without the right equipment. We recommend that you use our le gauge. This will help you obtain the maximum kickback reduction and cutting performance from your chain.
WARNING! The risk of kickback is increased with a badly sharpened chain!
General information on sharpening cutting teeth
Never use a blunt chain. When the chain is blunt you have to exert more pressure to force the bar through the wood and the cuttings will be very small. If the chain is very blunt it will not produce any cuttings at all. Wood powder would be the only result. A sharp chain eats its way through the wood and produces long, thick cuttings. See the Technical data section for information about sharpening your chain.
WARNING! The following faults will increase the risk of kickback considerably: File angle too large

Cutting angle too small

The cutting part of the chain is called the cutting link and this consists of a cutting tooth (A) and the raker lip (B). The cutting depth is determined by the difference in height between the two.

File diameter too small

Sharpening cutting teeth
When you sharpen a cutting tooth there are ve important factors to remember. 1 Filing angle
To sharpen cutting teeth you will need a round le and a le gauge. See the Technical data section for information on the size of le and gauge that are recommended for the chain tted to your chain saw.

Cutting angle

Check that the chain is correctly tensioned. A slack chain will move sideways, making it more difcult to sharpen correctly.

3 File position

Always le cutting teeth from the inside face. Reduce the pressure on the return stroke. File all the teeth on one side rst, then turn the chain saw over and le the teeth on the other side.
Round le diameter File all the teeth to the same length. When the length of the cutting teeth is reduced to 4 mm (0.16") the chain is worn out and should be replaced.

File depth

General advice on setting raker clearance
When you sharpen the cutting teeth you reduce the raker clearance (=cutting depth). To maintain optimal cutting performance you must le back the raker lip to the recommended height. See the Technical data section to nd the raker clearance for your particular chain.

Tensioning the chain

WARNING! A slack chain may jump off and cause serious or even fatal injury.
The more you use a chain the longer it becomes. It is therefore important to adjust the chain regularly to take up the slack. On a low-kickback cutting link the front edge of the raker lip is rounded. It is very important that you maintain this radius or bevel when you adjust the raker clearance. Check the chain tension every time you refuel. NOTE! A new chain has a running-in period during which you should check the tension more frequently. The position of the chain tensioning screw on our chain saws varies from model to model. See the What is what? section to nd out where it is on your model. Tension the chain as tightly as possible, but not so tight that you cannot pull it round freely by hand. We recommend that you use our raker gauge to achieve the correct clearance and bevel on the raker lip.

Unless the user resists this pushing force there is a risk that the chain saw will move so far backwards that only the kickback zone of the bar is in contact with the tree, which will lead to a kickback.
Cutting with the bottom edge of the bar, i.e. from the top of the object downwards, is known as cutting on the pull stroke. In this case the chain saw pulls itself towards the tree and the front edge of the chain saw body rests naturally on the trunk when cutting. Cutting on the pull stroke gives the operator better control over the chain saw and the position of the kickback zone. Before use:
Check that the chain brake works correctly and is not damaged. See the instructions under the heading Checking the chain brake. Check that the rear right hand guard is not damaged. Check that the throttle lock works correctly and is not damaged. Check that the start and stop switch works correctly and is not damaged. Check that all handles are free from oil. Check that the anti vibration system works and is not damaged. Check that the mufer is securely attached and not damaged. Check that all parts of the chain saw are tightened correctly and that they are not damaged or missing. Check that the chain catcher is in place and not damaged.
Follow the instructions on sharpening and maintaining your bar and chain. When you replace the bar and chain use only combinations that are recommended by us. See instructions under the headings Cutting equipment and Technical data. WARNING! The risk of kickback is increased if you use the wrong cutting equipment or a chain that is not sharpened correctly. The wrong combination of bar and chain can increase the risk of kickback!
General safety precautions
Chain saws are designed solely for cutting wood. The only accessories you may use with this engine unit are the combinations of bars and chains we recommend in the Technical data section. Never use the machine if you are tired, if you have drunk alcohol, or if you are taking medication that could affect your vision, your judgement or your co-ordination.

Starting

Wear personal protective equipment. See instructions under the heading Personal protective equipment. Never use a machine that has been modied in any way from its original specication. Never use a machine that is faulty. Carry out the checks, maintenance and service instructions described in this manual. Some maintenance and service measures must be carried out by trained and qualied specialists. See instructions under the heading Maintenance. Never use any accessories other than those recommended in this manual. See instructions under the headings Cutting equipment and Technical data. WARNING! The risk of accident is increased if you use the wrong cutting equipment or a chain that is not sharpened correctly. Using the wrong combination of bar and chain can increase the risk of accidents.

Before using a chain saw you must understand the effects of kickback and how to avoid them. See instructions under the heading How to avoid kickback. Before using a chain saw you must understand the difference between cutting with the top and bottom edges of the bar. See instructions under the heading How to avoid kickback.
Never refuel the machine while the engine is running. Make sure there is plenty of ventilation when refuelling or mixing fuel (gasoline and 2-stroke oil). Move the machine at least 3 m from the refuelling point before starting it.

Basic safety rules

Look around you: To ensure that people, animals or other things cannot affect your control of the machine. To make sure that none of the above might come within reach of your saw or be injured by falling trees.
Never start the machine: If you have spilt fuel or chain oil on the machine. Wipe off the spillage and allow remaining fuel to evaporate. 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. If the machine is leaking fuel. Check regularly for leaks from the fuel cap and fuel lines.
Follow the instructions above, but do not use a chain saw in a situation where you cannot call for help in case of an accident. Do not use the machine in bad weather, such as dense fog, heavy rain, strong wind, intense cold, etc. Working in bad weather is tiring and often brings added risks, such as icy ground, unpredictable felling direction, etc.
Take great care when removing small branches and avoid cutting bushes (i.e. cutting many small branches at the same time). Small branches can be grabbed by the chain and thrown back at you, causing serious injury.

Basic cutting technique

General
Always use full throttle when cutting! Reduce the speed to idle after every cut (running the engine for too long at full throttle without any load, i.e. without any resistance from the chain during cutting, can lead to serious engine damage). Cutting from above = Cutting on the pull stroke. Cutting from below = Cutting on the push stroke.

Finish the felling cut parallel with the directional cut line so that the distance between them is at least 1/10 of the trunk diameter. The uncut section of the trunk is called the felling hinge.
WARNING! Unless you have special training we advise you not to fell trees with a diameter larger than the bar length of your saw!
The felling hinge controls the direction that the tree falls in.
WARNING! Most kickback accidents happen during limbing! Pay close attention to the position of the kickback zone of the bar when you are limbing branches that are in tension!
Cutting trees and branches that are in tension
Preparations: Work out which side is in tension and where the point of maximum tension is (i.e. where it would break if it was bent even more).
Make sure that you can stand and move about safely. Work on the left side of the trunk. Work as close as possible to the chain saw for maximum control. If possible, let the weight of the chain saw rest on the trunk.
Decide which is the safest way to release the tension and whether you are able to do it safely. In complicated situations the only safe method is to put aside your chain saw and use a winch.

General advice:

Position yourself so that you will be clear of the tree or branch when the tension is released.
Keep the trunk between you and the chain saw as you move along the trunk.
Cutting the trunk into logs
See instructions under the heading Basic cutting technique.
Make one or more cuts at or near the point of maximum tension. Make as many cuts of sufcient depth as necessary to reduce the tension and make the tree or branch break at the point of maximum tension.
Freeing a tree that has fallen badly

Freeing a trapped tree

It is very dangerous to remove a trapped tree and there is high accident risk. The safest method is to use a winch. Tractor-mounted Never cut straight through a tree or branch that is in tension!

Portable

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WHAT IS WHAT?

Husqvarna 340/345/350

Mixing

Always mix the gasoline and oil in a clean container intended for fuel. Always start by lling half the amount of the gasoline to be used. Then add the entire amount of oil. Mix (shake) the fuel mixture. Add the remaining amount of gasoline. Mix (shake) the fuel mixture thoroughly before lling the machines fuel tank.

Gasoline

This engine is certied to operate on unleaded gasoline. Use good quality unleaded gasoline.
The lowest octane recommended is 87. If you run the engine on a lower octane than 87 it can result in knocking. This gives rise to a high engine temperature, which can result in serious engine damage. When working with continuous high revs (e.g. limbing) a higher octane is recommended.
Do not mix more than one months supply of fuel at a time. If the machine is not used for some time the fuel tank should be emptied and cleaned. This engine is certied to operate on unleaded gasoline.

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%). 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. Gasoline, litre US gallon 1/Two-stroke oil, litre 2% (1:50) 0,10 0,20 0,30 0,40 US. oz. 2 1/1/7/8 In countries where no special chain oil is available, EP90 transmission oil can be used. Never use waste oil. This results in damage to the oil pump, the bar and the chain. It is important to use oil of the right grade (suitable viscosity range) to suit the air temperature. In temperatures below 0C (32F) some oils become too viscous. This can overload the oil pump and result in damage to the oil pump components. Contact your service agent when choosing chain oil. The chain lubrication system is automatic and we recommend the use of special oil (chain oil) with good adhesion characteristics.

Fuelling

WARNING! Taking the following precautions, will lessen the risk of re: Do not smoke or place hot objects near fuel. Always shut off the engine before refuelling. When refuelling, open the fuel cap slowly so that any excess pressure is released gently. Tighten the fuel cap carefully after refuelling. Always move the machine away from the refuelling area before starting.

Clean the area around the fuel cap. Clean the fuel and chain oil tanks regularly. The fuel lter must be replaced at least once a year. Contamination in the tanks causes malfunction. Make sure the fuel is well mixed by shaking the container before refuelling. The capacities of the chain oil tank and fuel tank are carefully matched. You should therefore always ll the chain oil tank and fuel tank at the same time.

Min 3 m (10ft)

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STARTING AND STOPPING

Starting and stopping

Warm engine

WARNING! Note the following before starting: Never start a chain saw unless the bar, chain and all covers are tted correctly. Otherwise the clutch can come loose and cause personal injuries. Always move the machine away from the refuelling area before starting. Place the machine on rm ground. Make sure you have a secure footing and that the chain cannot touch anything. Keep people and animals well away from the working area. Use the same procedure as for starting a cold engine but without setting the choke control in the choke position. The correct choke/start throttle setting is obtained by moving the choke control to the choke position and then pushing it in again.

Cold engine

Starting: The chain brake should be activated when starting the chain saw. Activate the chain brake by pushing the front hand guard forwards. Ignition; choke: Set the choke control in the choke position. This should automatically set the stop switch to the start position. Start throttle: The correct choke/start throttle setting is obtained by moving the control to the choke position.
Grip the front handle with your left hand. Hold the chain saw on the ground by placing your right foot through the rear handle. Pull the starter handle with your right hand and pull out the starter cord slowly until you feel a resistance (as the starter pawls engage) then pull rmly and rapidly. Never wrap the starter cord around your hand As the chain brake is still activated the engine must return to idling speed as soon as possible by disengaging the throttel latch in order to avoid unnecessery wear on the clutch assembly.
If the machine is tted with a decompression valve (A): Press the valve to reduce the pressure in the cylinder and make starting easier. You should always use the decompression valve when starting the machine. Once the machine has started the valve will automatically return to its original setting.

Push in the choke control as soon as the engine re and make repeated starting attempts. Immediately press and release the throttle when the engine starts. That will disengage the throttle latch. CAUTION! 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.
Pull the front hand guard towards the front handle. The chain brake is now disengaged. Your saw is ready for use.

Stopping

Stop the engine by switching off the ignition.

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MAINTENANCE

Carburettor

Your Husqvarna product has been designed and manufactured to specications 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 runningin period, ask your dealer/service workshop (who will have a rev counter at their disposal) to adjust your carburettor.

Fine adjustment

When the machine has been run-in the carburettor should be nely adjusted. The ne adjustment should be carried out by a qualied person. First adjust the L-jet, then the idling screw T and then the H-jet.

Conditions

Before any adjustments are made the air lter should be clean and the cylinder cover tted. Adjusting the carburettor while a dirty air lter is in use will result in a leaner mixture next time the lter is cleaned. This can give rise to serious engine damage. Carefully turn the L and H needle to the mid point. 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. CAUTION! If the chain rotates while idling the T-screw must be turned anti-clockwise until the chain stops. Place the machine on a at surface so that the bar points away from you and so that the bar and chain do not come into contact with the surface or other objects.
Function, Basic settings, Fine adjustment
WARNING! Do not start the chain saw unless the bar, chain and clutch cover (chain brake) are tted, otherwise the clutch may come loose and cause personal injury.

Function

The carburettor governs the engines 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. The setting of the carburettor means that the engine is adepted to local conditions, for example, the climate, altitude, fuel and the type of 2-stroke oil. The carburettor has three adjustment controls: L = Low speed jet H = High speed jet T = Idle adjustment screw

Low speed jet L

Turn the low speed jet L clockwise until it stops. If the engine accelerates poorly or idles unevenly, turn the low speed jet L anticlockwise until good acceleration and idling are achieved. CAUTION! If the chain rotates while idling the T-screw must be turned anti-clockwise until the chain stops.
Final setting of the idling speed T
Adjust the idle speed with the T-screw. If it is necessary to readjust, turn the T-screw clockwise while the engine is running, until the chain starts to rotate. Then turn counter-clockwise until the chain stops. A correctly adjusted idle speed setting occurs when the engine runs smoothly in every position. It should also be good margin to the rpm when the chain starts to rotate.
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.
WARNING! Contact your servicing dealer, if the idle speed setting cannot be adjusted so that the chain stops. Do not use the chain saw until it has been properly adjusted or repaired.

High speed jet H

The high speed needle H inuence the power of the machine. A too lean adjusted high speed (high speed needle H turn too much clockwise) gives overrevs and damages the engine. Do not allow the engine to run at full speed for more than 10 seconds. Turn the high speed needle H counter-clockwiseuntil the stop. If the engine runs roughly, turn the high speed needle slowly the minimum amount clockwise until the engine runs smoothly. The high speed needle H is correctly set when the saw 4-cycles a little. If the machine whistles the setting is too lean. If there is too much exhaust gas at the same time as the machine 4-cycles much, the setting is too rich. Turn the high speed needle H until the setting sounds correct.

Basic settings and running in
The carburettor is set to its basic setting when test run at the factory. The basic setting is richer than the optimum setting and should be maintained for the rst hours that the machine is in use. The carburettor should then be nely adjusted. Fine adjustment should be carried out by a suitably trained person. CAUTION! If the chain rotates while idling the T-screw must be turned anti-clockwise until the chain stops. Rec. idle speed: 2700 rpm
For optimum setting of the carburettor, contact a qualied servicing dealer who has a revolution counter at his disposal.
Correctly adjusted carburettor
When the carburettor is correctly adjusted the machine accelerates without hesitation and the machine 4-cycles a little at max speed. It is also important that the chain does not rotate at idle. If the L-jet is set too lean it may cause starting difculties and poor acceleration. If the H-jet is set too lean the machine will have less power, poor acceleration and could suffer damage to the engine. If the L and H-jets are set too rich it will lead to acceleration problems or too low a working speed.
Tensioning the recoil spring
Hook the starter cord in the notch in the pulley and turn the starter pulley about 2 turns clockwise. CAUTION! Check that the pulley can be turned at least a further 1/2 turn when the starter cord is pulled all the way out.

Starter

WARNING! When the recoil spring is wound up in the starter housing it is under tension and can, if handled carelessly, pop out and cause personal injury. Always be careful when changing the recoil spring or the starter cord. Always wear protective goggles.
Changing a broken recoil spring
Changing a broken or worn starter cord
Lift off the pulley. See instructions under heading Changing a broken or worn starter cord. Remove the recoil spring from inside the pulley by tapping the pulley lightly with its inside face downwards against a work bench or the like. If the spring pops out during tting, wind it up again, working from the outside in towards centre. Lubricate the recoil spring with light oil. Fit the pulley and tension the recoil spring.
Loosen the screws that hold the starter against the crankcase and remove the starter.
Pull out the cord approx. 30 cm and hook it into the notch in the rim of the pulley. Release the recoil spring by letting the pulley rotate slowly backwards.

TECHNICAL DATA

Technical data
340 Engine Cylinder volume, cu.in/cm3 Cylinder bore, inch/mm Stroke, inch/mm Idle speed, rpm Power, kW/ rpm Ignition system Manufacture Type of ignition system Spark plug Electrode gap, inch/mm Fuel and lubrication system Manufacturer of carburettor Carburettor type Fuel tank capacity, US pint/litre Oil pump capacity at 9,000 rpm, ml/min Oil tank capacity, US pint/litre Type of oil pump Weight Chain saw without bar or chain, empty tanks, Lbs/kg Chain/bar Standard bar length, inch/cm Recommended bar lengths, inch/cm Usable cutting length, inches/cm Chain speed at max. power, m/sec Pitch, inch/mm Thickness of drive links, inch/mm 13"/33 13-20"/33-50 12-19"/31-49 17,3 0,325/8,25 0,050/1,3 0,058/1,5 0,063/1,6 Number of teeth on drive sprocket 7 13"/33 13-20"/33-50 12-19"/31-49 17,3 0,325/8,25 0,050/1,3 0,058/1,5 0,063/1,13"/33 13-20"/33-50 12-19"/31-49 17,3 0,325/8,25 0,050/1,3 0,058/1,5 0,063/1,10,3/4,7 10,3/4,7 10,6/4,8 Zama C3-EL18 1,06/0,0,53/0,25 Automatic Zama C3-EL18 1,06/0,0,53/0,25 Automatic Zama C3-EL18 1,06/0,5 5-12 0,53/0,25 Automatic SEM CD NGK BPMR 7A/ Champion RCJ 7Y 0,02/0,5 SEM CD NGK BPMR 7A/ Champion RCJ 7Y 0,02/0,5 SEM CD NGK BPMR 7A/ Champion RCJ 7Y 0,02/0,5 2,49/40,8 1,57/40 1,28/32,2,0/9000 2,75/45,0 1,65/42 1,28/32,2,2/9000 3,15/51,7 1,77/45 1,28/32,2,3/350

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Recommended original and replacement bar and chain combinations
Following is a list of recommended cutting equipment for the Husqvarna chain saw models 340, 345 and 350. The combinations of power head, bar and chain have been investigated in accordance with the kickback and vibration requirements of ANSI B 175.1 2000. The guide bar nose radius is determined by either the maximum number of teeth in the nose sprocket or the corresponding maximum nose radius of a solid bar. The following list is the chain saw manufacturers recommendations. There may be other combinations available, which will also achieve kickback reduction. As we are listing the maximum guide bar nose radius, you may use a guide bar with smaller nose radius than in our list. For guide bars of the same length, all sprocket-nose guide bars of the same pitch and having the same number of sprocket teeth may be considered to have equivalent kickback energy. A hard nose bar having the same length and nose radius as a sprocket-nose bar may be considered to have equivalent or less kickback energy than the sprocket-nose bar. Low kickback saw chain is a chain which has only met the kickback performance requirements of ANSI B 175.1 safety requirements for gasoline powered chain saws when tested on the representative sample of chain saws below 3.8 cu. in. specied in ANSI 175.1. We recommend that you as a replacement use the listed chains or "Low kickback saw chains" which are available at your dealer. Bar Length, inches Pitch, inch Max nose radius 20 0,325 0,325 0,325 0,325 0,325 0,325 0,325 0,325 0,325 10T 10T 10T 10T 10T 10T 10T 10T 12T Husqvarna H25, Oregon 21BP/34LG/34SL Husqvarna H30, Oregon 95VP Chain

WARNING

Before using our products, please read this manual carefully to understand the proper use of your unit.

Operators manual

APPLICABLE SERIAL NUMBERS: 80100101 and up
330BT 350BT 370BTS 380BTS

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EC-declaration of conformity
EC-declaration of conformity [330BT] (Applies to Europe only)
Husqvarna AB, SE-Huskvarna, Sweden, tel +46-36-146500, declares under sole responsibility that the blowers Husqvarna 330BT with serial numbers dating 2007 and onwards (the year is clearly stated on the rating plate, followed by the serial number), comply with the requirements of the COUNCILS DIRECTIVE: of June 22, 1998 relating to machinery 98/37/EC, annex IIA. of May 3, 1989 relating to electromagnetic compatibility 89/336/EEC, and applicable supplements. of May 8, 2000 relating to the noise emissions in the environment 2000/14/EC. For information relating to noise emissions, see the chapter Technical data. The following standards have been applied: ISO 22868:2005, CISPR 12:2005, ISO 14740:1998. TUV Rheinland Japan Ltd., 9F 3-19-5 Shin Yokohama, Kohoku-ku, Yokohama 222-0033, Japan, has performed voluntary type examination on behalf of Husqvarna AB. The certificates are numbered: AM5009/9322/0001 Huskvarna 12/01/2007
Bo Andrasson, Managing director
APPROVAL NUMBER OF CE EXHAUST EMISSION REGULATION (2002/88/EC) e13*97/68SH2G3*2002/88*0098*03
EC-declaration of conformity [350BT] (Applies to Europe only)
Husqvarna AB, SE-Huskvarna, Sweden, tel +46-36-146500, declares under sole responsibility that the blowers Husqvarna 350BT with serial numbers dating 2007 and onwards (the year is clearly stated on the rating plate, followed by the serial number), comply with the requirements of the COUNCILS DIRECTIVE: of June 22, 1998 relating to machinery 98/37/EC, annex IIA. of May 3, 1989 relating to electromagnetic compatibility 89/336/EEC, and applicable supplements. of May 8, 2000 relating to the noise emissions in the environment 2000/14/EC. For information relating to noise emissions, see the chapter Technical data. The following standards have been applied: ISO 22868:2005, CISPR 12:2005, ISO 14740:1998. TUV Rheinland Japan Ltd., 9F 3-19-5 Shin Yokohama, Kohoku-ku, Yokohama 222-0033, Japan, has performed voluntary type examination on behalf of Husqvarna AB. The certificates are numbered: AM Huskvarna 27/04/2007
APPROVAL NUMBER OF CE EXHAUST EMISSION REGULATION (2002/88/EC) e13*97/68SH3G3*2002/88*0334*01
EC-declaration of conformity [370BTS] (Applies to Europe only)
Husqvarna AB, SE-Huskvarna, Sweden, tel +46-36-146500, declares under sole responsibility that the blowers Husqvarna 370BTS with serial numbers dating 2006 and onwards (the year is clearly stated on the rating plate, followed by the serial number), comply with the requirements of the COUNCILS DIRECTIVE: of June 22, 1998 relating to machinery 98/37/EC, annex IIA. of May 3, 1989 relating to electromagnetic compatibility 89/336/EEC, and applicable supplements. of May 8, 2000 relating to the noise emissions in the environment 2000/14/EC. For information relating to noise emissions, see the chapter Technical data. The following standards have been applied: ISO 7917:1987, CISPR 12:2005, ISO 14740:1998. TUV Rheinland Japan Ltd., 9F 3-19-5 Shin Yokohama, Kohoku-ku, Yokohama 222-0033, Japan, has performed voluntary type examination on behalf of Husqvarna AB. The certificates are numbered: AM5007/9255/0001 Huskvarna 10/03/2006
APPROVAL NUMBER OF CE EXHAUST EMISSION REGULATION (2002/88/EC) e13*97/68SH3G3*2002/88*0223*03
EC-declaration of conformity [380BTS] (Applies to Europe only)
Husqvarna AB, SE-Huskvarna, Sweden, tel +46-36-146500, declares under sole responsibility that the blowers Husqvarna 380BTS with serial numbers dating 2008 and onwards (the year is clearly stated on the rating plate, followed by the serial number), comply with the requirements of the COUNCILS DIRECTIVE: of June 22, 1998 relating to machinery 98/37/EC, annex IIA. of May 3, 1989 relating to electromagnetic compatibility 89/336/EEC, and applicable supplements. of May 8, 2000 relating to the noise emissions in the environment 2000/14/EC. For information relating to noise emissions, see the chapter Technical data. The following standards have been applied: ISO 22868:2005, CISPR 12:2005, ISO 14740:1998. TUV Rheinland Japan Ltd., 9F 3-19-5 Shin Yokohama, Kohoku-ku, Yokohama 222-0033, Japan, has performed voluntary type examination on behalf of Husqvarna AB. The certificates are numbered: AM5011/6693/0001 Huskvarna 23/10/2007

APPROVAL NUMBER OF CE EXHAUST EMISSION REGULATION (2002/88/EC) e13*97/68SH3G3*2002/88*0106*03

Contents

Safety. 5
SAFETY FIRST. 5 Notes on types of warnings. 5
Warning labels on the machine. 5

Symbols. 5

Symbols on the machine. 6 Safety Precautions. 6
WORKING CONDITIONS. WORKING CIRCUMSTANCE. AVOID NOISE PROBLEM. WORKING PLAN. FUEL. BEFORE STARTING THE ENGINE. USING THE PRODUCT. MAINTENANCE. TRANSPORTATION. STORAGE. 9 9
What is what?. 10 Technical data. 14 Assembly. 15
SWIVEL JOINT. 15 THROTTLE LEVER. 15 THROTTLE CABLE. 15 HANDLEBAR [OPTION]. 15 BLOWER TUBES. 15 HARNESS. 16 WAIST BELT [350BT] [370BTS] [380BTS]. 16

Fuel. 17

FUEL. 17 HOW TO MIX FUEL. 17 FUELING THE UNIT. 17

Operation. 18

STARTING ENGINE. 18 ADJUSTING IDLE SPEED. 19 STOPPING ENGINE. 19

Maintenance. 20

AIR CLEANER. FUEL FILTER. SPARK PLUG. MUFFLER. SPARK ARRESTER. AIR INLET NET. IGNITION COIL AIR GAP INSPECTION. SHOLDER STRAP. 22 22

Storage. 22

Safety

SAFETY FIRST

Instructions contained in warnings within this manual and warning seals marked with a symbol on the blower concern critical points which must be taken into consideration to prevent possible serious bodily injury, and for this reason you are requested to read all such instructions carefully and follow them without fail.
Notes on types of warnings
Instructions labeled as shown above, concern critical steps or procedures which must be followed in order to prevent accidents which could lead to serious bodily injury or death.This mark is used to indicate instructions which must be followed without exception.

IMPORTANT

Instructions labeled as shown above concern steps or procedures which, if not followed correctly, could lead to mechanical failure, breakdown, or damage.
Used to label supplementary instructions designed to provide hints or directions useful in the use of the product.
Warning labels on the machine

Symbols

WARNING! The machine can be a dangerous tool if used incorrectly or carelessly, which can cause serious or fatal injury to the operator or others. The blower operator must make sure that no bystanders or animals come nearer than 50 feet (15 meters). Whenever several operators are working in the same work area, they should maintain a safe distance of at least 50 feet (15 meters) from one another. A breathing mask should be used when there is a risk of dust.

Please read the operators manual carefully and make sure you understand the instructions before using the machine.
Always wear: Hearing protection Approved eye protection
Keep all parts of your body away from hot surfaces.
This product is in accordance with applicable EC directives. Always wear protective gloves.
Other symbols/decals on the machine refer to special certification requirements for certain markets.
If the warning label peels off or becomes soiled and impossible to read, you should contact the dealer from which you purchased the product to order new labels and affix them in the required location(s).
The blower can forcibly throw objects that can bounce back. This can result in serious eye injuries if the recommended safety equipment is not used.

Symbols on the machine

(a) (b) (c) (d)
For safe operation and maintenance, symbols are carved in relief on the machine. Using to these indications, please be careful not to make a mistake. (a) The port to refuel the "MIX GASOLINE" Position: FUEL TANK CAP (b) The direction to close the choke Position: INTAKE CUP (c) The direction to open the choke Position: INTAKE CUP (d) The direction to stop the engine Position: THROTTLE LEVER

Safety Precautions

1. Read this Blower Operator Manual carefully. Be sure you understand how to operate this unit properly before you use it. Failure to do so could result in serious injury. 2. Be sure to keep this manual handy so that you may refer to it later whenever any questions arise. Also note that you are requested to contact the dealer from whom you purchased the product for assistance the event that you have any questions which cannot be answered herein. 3. Always be sure to include this manual when selling, lending, or otherwise transferring the ownership of this product. 4. Do not lend or rent your machine without the owner's manul. 5. Be sure that anyone using your unit understands the information contained in this manual. 6. Never let a child use the machine. 7. Long-term exposure to noise can result in permanent hearing impairment. So always use approved hearing protection. 8. 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. 9. A blower is a dangerous tool if used carelessly or incorrectly and can cause serious, even fatal injuries. It is extremely important that you read and understand the contents of this Operators manual. 10. 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. 11. The machine is only designed for blowing lawns, pathways, asphalt roads and the like.

WORKING CONDITIONS

1. Refrain from operating the blower if you are tired, ill, or upset, or if you are under the influence of alcohol, drugs or medication 2. To reduce the risk of hearing loss associated with sound levels, hearing protection is required. 3. To reduce the risk of injury associated with thrown objects, always wear eye protection and foot protection. Approved protective goggles must comply with standard ANSI Z87.1 in the USA or EN 166 in EU countries. 4. To reduce the risk of injury associated with the inhalation of dust, use a face filter mask in dusty conditions. 5. Wear rubber-soled shoes or shoes with some other form of anti-slip protection to help protect you against falling. 6. To reduce the risk of injury associated with objects being drawn into rotating parts, do not wear loose clothing, scarves, neck chains, hair longer than shoulder length, or other loose material.

AVOID NOISE PROBLEM

Check and follow the local regulations as to sound levels and hours of operations for blower. 1. Operate power equipment only at reasonable hours, not early in the morning or late at night when people might be disturbed. Comply with times listed in local ordinances. 2. To reduce sound levels, limit the number of pieces of equipment used at any one time. 3. Operate power blowers at the lowest possible throttle speed to do the job. 4. Check your equipment before operation, especially the muffler, air intakes and air filters.

WORKING PLAN

To reduce the risk of health damages, avoid excessive use and take sufficient time to rest.
To reduce the risk of fire and burn injury: a) Handle fuel with care. It is highly flammable. b) Do not smoke while handing fuel. c ) Do not refuel a hot engine. d) Do not refuel a running engine. e) Avoid spilling fuel or oil. Always wipe unit dry before using. f ) Move at least 10 ft. (3 meters) away from the fueling point before starting the engine. g) Always store gasoline in a container approved for flammable liquids. h) Make sure the unit is properly assembled and in good operating condition. i ) Do not use the blower near a fire, as aiming the blower in the direction of a flame may cause flammable substances to ignite.
7. Prolonged use of a blower, exposing the operator to vibrations and cold, may produce whitefinger disease (Raynauds phenomenon), the symptoms of which include tingling and burning sensations followed by loss of color and numbness in the fingers. All factors which contribute to whitefinger disease are not known, but cold weather, smoking diseases or physical conditions as well as long periods of exposure to vibration are mentioned as factors. In order to reduce the risk of whitefinger disease, the following precautions are strongly recommended a) Keep your body warm. Avoid using the blower during rain. b) Take more than 5 minutes of break in a warm place frequently. c) Maintain a firm grip at all times, but do not squeeze the handles with constant, excessive pressure. d) If you feel discomfort, redness and swelling of your fingers or any other part of your body, see a doctor before it gets worse. 8. The ignition system of your unit produces an electromagnetic field of a very low intensity. This field may interfere with some pacemakers. To reduce the risk of serious or fatal injury, people with pacemaker should consult their physician and the pacemaker manufacturer before operating this tool.

WORKING CIRCUMSTANCE

1. To reduce the risk of injury associated with exhaust fume inhalation, do not operate in unventilated area. The exhaust gases contain harmful carbon monoxide. 2. Avoid using the blower where stable footing and balance are not assured. 3. Never operate the machine in high wind, bad weather, potentially explosive atmosphere, when visibility is poor or in very high or low temperatures. (Our recommended use environment is below 40 degrees C (104 degrees F).)
BEFORE STARTING THE ENGINE
Each time before starting the engine, inspect the entire unit to see if every part is in good order and is securely tightened in place. If any damage is found in the fuel line, the exhaust line, or the ignition wiring, do not use the blower until it has been repaired. c) Do not allow bystanders in work area. d) Do not point the blower tube in the direction of people or pets. e) Always check to be sure that no debris has been blown onto someone elses property. f) Pay attention to the direction of the wind, do not work against the wind. 3. To minimize blowing time. a) Use rakes and brooms to loosen debris before blowing. b) In dusty conditions, slightly dampen surfaces or use a mister attachment when water is available. c) Conserve water by using power blowers instead of hoses for many lawn and garden applications, including areas such as gutters, screens, patios, grills, porches and gardens. 4. The blower must not be used while on a ladder or scaffolding.
Before starting operation, always make sure to check if any obstacles are left inside the volute case and net. The obstacles may cause serious injury or damage to fan and volute case.

[330BT]

[350BT] [370BTS] [380BTS]
Check to see if the shock-absorbers <A> have become cracked or otherwise damaged. Note that failing to replace these rubber and spring mounts when they have become cracked or damaged may cause the engine to come loose from its frame during use, thus resulting in possible serious bodily injury. If cracked, be sure to replace without delay. 5. Never put the machine down with the engine running unless you have it in clear sight. 6. Never touch the spark plug or plug cord while the engine is in operation. Doing so may result in being subjected to an electrical shock.

To reduce the risk of injury associated with contacting rotating parts, stop the engine before installing or removing attachments. Never take off the Guard Net <B>. Always disconnect the spark plug before performing maintenance or accessing movable parts. 7. Never touch the muffler, spark plug, or other metallic parts of the engine, or area around the engine cover while the engine is in operation or immediately after shutting down the engine. These metallic parts reach high temperatures during operation and doing so could result in serious burns.

<A> <B>

The temperature of the machine may increase after stopping the engine. Especially never forget to cool down the engine before refueling the machine. 8. If the engine catches fire or in any other emergency situation that requires you to free yourself from the machine, open the buckle in the waist belt and drop the machine backward. 9. After using blowers and other equipment, CLEAN UP! Dispose of debris in trash receptacles.

<A>

USING THE PRODUCT
While using the product, if abnormal noise or vibration occurs, stop the engine immediately and contact the nearest Husqvarna servicing dealer for assistance. Checking the fan is very important. If the rotating fan should break up, it might lead to serious accidents. 1. Check the work area that the blower will be used in and remove or cover all valuables that may be damaged by the air blast or thrown debris. 2. To reduce the risk of injury associated with thrown objects. a) Watch out for children, pets, open windows or freshly washed cars, and blow debris safely away. b) Use the full blower tube extension so the air stream can work close to the ground.

MAINTENANCE

1. In order to maintain your product in proper working order, perform the maintenance and checking operations described in the manual at regular intervals. 2. Always be sure to turn off the engine and disconnect the spark plug before performing any maintenance or checking procedures.

TRANSPORTATION

Drain the fuel from the fuel tank before transporting or storing the blower. Secure the blower so that it does nor receive damage from shock doing transportation. Do not apply strong forces to the blower, such as throwing it or dropping it. Doing so in validates the warranty.
The metallic parts, engine cover, and area around the engine reach high temperatures immediately after stopping the engine. 3. Examine the blower at intervals for loose fasteners and rusted or damaged parts. Use special care around the fuel line, the muffler, and the ignition wiring. 4. All engine service except for those described in this manual should be performed by competent service personnel. Improper service to the blower fan and muffler could cause a hazardous failure. 5. When replacing the any other part or any lubricant, always be sure to use only Husqvarna products or products which have been certified by Husqvarna for use with the Husqvarna product. 6. In the event that any part must be replaced or any maintenance or repair work not described in this manual must be performed, please contact the nearest Husqvarna servicing dealer for assistance. 7. Do not use any accessory or attachment other than those bearing the Husqvarna mark and recommended for the unit. 8. Under no circumstances should you ever take apart the product or alter it in any way. Doing so might result in the product becoming damaged during operation or the product becoming unable to operate properly.

STORAGE

When storing the blower, choose a space indoors, dry, cool and dark, well-ventilated, free from dust and out of the reach of children.

What is what?

<330BT>
1. Frame 2. Harness 3. Spark Plug Cap 4. Throttle Lever 5. Guard Net 6. Choke Lever 7. Air Cleaner 8. Volute Case, Cover 9. CAUTION Label 10. Elbow 11. Fuel Tank 12. Recoil Starter
13. Stop Switch with Throttle Position Setting 14. Engine Cover 15. Handle Bar (Option) 16. Fan 17. Shock Absorber (Spring) 18. Shock Absorber (Rubber) 19. Band (Stopper) 20. Flexible Hose 21. Pipes 22. Pad 23. Flat Nozzle (Option)

DISPOSAL

When disposing your machine, fuel or oil for the machine, be sure to allow your local regulations. Frame: Harness: Throttle lever: Volute case, Volute cover, Engine cover: Pad: Flexible hose: Pipes: Fan: Element: PE (Polyethylene) Chemical fiber Metal, Plastic PA66GF (Glass-reinforced nylon), Brass Chemical fiber EVA (Ethylene vinyl acetate) PP (Polypropylene), PE (Polyethylene) PA66GF (Glass-reinforced nylon) Urethane
* The insert nut of volute case and fan can be taken off.

<350BT>

1. Frame 2. Harness 3. Spark Plug Cap 4. Throttle Lever 5. Net 6. Choke Lever 7. Air Cleaner 8. Volute Case, Cover 9. CAUTION Label 10. Elbow 11. Fuel Tank
12. Recoil Starter 13. Stop Switch with Throttle Position Setting 14. Engine Cover 15. Handle Bar (Option) 16. Fan 17. Shock Absorber (Rubber) 18. Flexible Hose 19. Pipes 20. Pad 21. Flat Nozzle (Option)

<370BTS>

When disposing your machine, fuel or oil for the machine, be sure to allow your local regulations. Frame: Harness: Throttle lever: Volute case, Volute cover, Engine cover: Pad: Flexible hose: Pipes: Fan: Element: PE (Polyethylene) Chemical fiber Metal, Plastic PA66GF (Glass-reinforced nylon), Brass Chemical fiber EVA (Ethylene vinyl acetate) PP (Polypropylene) PA66GF (Glass-reinforced nylon) Paper, Urethane
* The insert nut of volute case, volute cover and fan can be taken off.

<380BTS>

When disposing your machine, fuel or oil for the machine, be sure to allow your local regulations. Frame: Harness: Throttle lever: Volute case, Volute cover, Engine cover: Pad: Flexible hose: Pipes: Fan: Element: ABS Chemical fiber Metal, Plastic PA66GF (Glass-reinforced nylon), Brass EVA (Ethylene vinyl acetate) EVA (Ethylene vinyl acetate) PP (Polypropylene) PA66GF (Glass-reinforced nylon) Paper, Urethane

Technical data

MODEL Dimensions (L x W x H) mm (in) Dry Weight kg (lbs) (including pipe) Dry Weight kg (lbs) (without accessories) Fuel Tank Capacity liter (fl. oz) Engine Type Piston Displacement cu. cm (cu. in) Air Filter Carburetor (Diaphragm) valve type Ignition System Spark Plug Muffler Idle speed rpm Operating Engine Speed rpm Fuel Consumption liter/h (fl. oz/h) Average Air Volume (w/std Pipe) cu. m/min (cf/m) Average Air Volume (@ housing) cu. m/min (cf/m) Air velocity m/sec (mph) (Maximum) Noise Level (50 Feet ANSI B175.2-2000) dB(A) Sound power level EC directive 2000/14/EC, measured dB (A) Sound power level EC directive 2000/14/EC, guaranteed dB (A) Noise pressure level at the operators ear (LpAeq) prEN15503 (ISO7917) dB (A) Vibration level at idle, right handle prEN15503 (ISO7916) m/s2 Vibration level at max, speed, right handle prEN15503 (ISO7916) m/s2
The data shown above are those in the case of one straight pipe. Specifications are subject to change without notice.
330BT 295x387x432 (11.6x15.2x17) 6.75 (14.9) 6.1 (13.4) 0.9 (30.4)
350BT 351x446x479 (13.8x17.6x18) 10.2 (22.5) 9.5 (20.9) 1.25 (42.3)
370BTS 365x464x485 (14x18x19) 12 (26.5) 11.2 (24.7) 1.75 (60.0)
380BTS 410x509x497 (16.1x20x19.6) 13.2 (29.1) 12.4 (27.3) 2.13 (72.0)
Air cooled 2-cycle gasoline engine 29.5 (1.8) Single stage filter 50.2 (3.1) Single stage filter (half wet) Rotary CDI Digital Ignition NGK CMR7H Spark arrester equipped to 6700 0.58 (19.6) 10.2 (360) 12.2 (431) 65 (145) 1.9 2.2200 to 6100 1.04 (35.2) 14 (494) 19.6 (692) 80 (180) 2.9 2.(ISO7917) 0.8 (ISO7916) 3.9 (ISO7916) 2000 to 6900 1.6 (54.1) 16 (565) 21.0 (742) 88 (198) 2.2 3.2000 to 6700 1.85 (62.6) 19.4 (685) 25.9 (915) 90 (201) 64.9 (4.0) 71.9 (4.4)

2-stage fresh flow filter system

Assembly

SWIVEL JOINT
1. Connect the blower and swivel joint with flexible hose. Clamp both ends of the flexible hose securely with the hardware supplied with the unit.
A light lubricant may be used to ease assembly of flexible hose to blower tube.

THROTTLE LEVER

1. Set up the throttle holder to the swivel and tighten the screw on the holder. When setting up the holder, please make sure to match the holder to the convex on the swivel joint as shown in F2. 2. Adjust the position and angle to achieve a comfortable working position, and tighten the throttle lever. (1) Cable (2) Hose

THROTTLE CABLE

[330BT] Fasten the throttle cable at central position of the hose by the band attached to the throttle cable. First, wrap the hose with the band fixed to the throttle cable from the lower side. Then, pass the band through a hole of the band as shown in figure. Please note that there is a possibility of damaging the hose if the band is fastened too tightly. [350BT] [370BTS] [380BTS] Use the clamp to fasten the colgate tube containing the throttle cable and the power cable to the hose. (1) Clamp

HANDLEBAR [OPTION]

1. Insert the holder, then assemble the handlebar (OPTION) and tighten it securely.

BLOWER TUBES

1. Align the protrusion and the groove provided on the tube ends and twist the tube until the connection is locked.
A light lubricant may be used to ease assembly of the blower tube.
If longer tube is required, the second straight pipe can be connected with the first one. If higher air speed is required, the round blow pipe can be replaced by the flat nozzle with the second straight pipe. (1) Flat nozzle (option)

HARNESS

The harness must always be worn when working with the machine. Failure to do so means you will be unable to maneuver safely and this can result in injury to yourself or others. A correctly adjusted harness and machine significantly facilitates the work. Adjust the harness to give the best working position.
Tighten the side straps so that the pressure is evenly distributed across the shoulders.
WAIST BELT [350BT] [370BTS] [380BTS]
The waist belt is attached to the rings on the left and right sides of the frame.

330BT has no waist belt.

Place the waist belt around your waist and not too far down on the stomach. Tighten the waist belt strap so that you feel the weight of the blower resting on your hip. Be sure to always tighten the buckle in front of your body.
If you are not using a waist belt, be sure to remove it from the unit and store it. There is a risk that the belt will be caught, toppling the unit. There is a danger that the belt will be sucked into the fan.

Gasoline is very flammable. Avoid smoking or bringing any flame or sparks near fuel. Make sure to stop the engine and allow it cool before refueling the unit. Select outdoor bare ground for fueling and move at least 10ft (3m) away from the fueling point before starting the engine. The engines are lubricated by oil specially formulated for aircooled 2-cycle gasoline engine use. If Husqvarna oil is not available, use an anti-oxidant added quality oil expressly labeled for air-cooled 2-cycle engine use. (JASO FC GRADE OIL or ISO EGC GRADE) Do not use BIA or TCW (2-stroke water-cooling type) mixed oil. RECOMMENDED MIXING RATIO GASOLINE 50:OIL 1 Exhaust emission are controlled by the fundamental engine parameters and components (i.e., carburation, ignition timing and port timing) without addition of any major hardware or the introduction of an inert material during combustion. These engines are certified to operate on unleaded gasoline. Make sure to use gasoline with a minimum octane number of 89 RON (USA/Canada: 87AL) If you use a gasoline of a lower octane value than specified, there is a danger that the engine temperature may rise and an engine problem such as piston seizing may consequently occur. Unleaded gasoline is recommended to reduce the contamination of the air for the sake of your health and the environment. Poor quality gasolines or oils may damage sealing rings, fuel lines or fuel tank of the engine.

FUELING THE UNIT

1. Untwist and remove the fuel cap. 2. Put fuel into the fuel tank to 80% of the full capacity. 3. Fasten the fuel cap securely and wipe up any fuel spillage around the unit.
1. Select bare ground for fueling. 2. Move at least 10 feet (3 meters) away from the fueling point before starting the engine. 3. Stop the engine and let it cool for a few minutes before refueling the unit. At that time, be sure to sufficiently agitate the mixed gasoline in the container. 4. Do not smoke or place hot objects near fuel.
FOR YOUR ENGINE LIFE, AVOID; 1. FUEL WITH NO OIL (RAW GASOLINE) - It will cause severe damage to the internal engine parts very quickly. 2. GASOHOL - It can cause deterioration of rubber and/or plastic parts and disruption of engine lubrication. 3. OIL FOR 4-CYCLE ENGINE USE - It can cause spark plug fouling, exhaust port blocking, or piston ring sticking. 4. Mixed fuels which have been left unused for a period of one month or more may clog the carburetor and result in the engine failing to operate properly. 5. When storing the product for a long period of time, clean the fuel tank after rendering it empty. Next, activate the engine and empty the carburetor of the composite fuel. 6. When scrapping the used mixed oil container, scrap it only at an authorized repository site.

[370BTS] [380BTS] (F26) 1. Unscrew 2 knob bolts and remove the air cleaner cover. Then remove the prefilter mounted inside the air cleaner cover. (2) Prefilter (1) Knob Bolt (3) Inner Case [380BTS] (4) Paper Filter 2. Wash the prefilter in fresh, non flammable cleaning solution (ex. warm soapy water) and then dry. (Clean the air filter once in a week.) 3. Exchange the paper filter element with new one in case it has been contaminated.

(2) (3)(380BTS ONLY) (4)

This prefilter is dry type. Never wash the prefilter in an oily cleaning solution. Never include oil in the wash. Do not clean the paper filter by tapping on it. [370BTS] [380BTS]

FUEL FILTER

A clogged fuel filter may cause poor acceleration of the engine. Check periodically to see if the filter is clogged with dirt. The filter can be taken out of the fueling port using a small wire hook. Disconnect the filter assembly from the fuel pipe and unhook the retainer to disassemble it. Clean the components with gasoline. (1) Screen (3) Holder (2) Element (x 2) (4) Retainer

SPARK PLUG

The spark plug may gather carbon deposits on its firing end with reasonable use. Remove and inspect the spark plug every 25 hours and clean the electrodes as necessary with a wire brush. The spark gap should be adjusted to.025 in (0.6 to 0.7mm). Plug manufacturers recommend replacing the plug twice a year to avoid unexpected plug failure in a job. REPLACEMENT PLUG IS A NGK CMR7H.
Note that using any spark plugs other than those designated may result in the engine failing to operate properly or in the engine becoming overheated and damaged. To install the spark plug, first turn the plug with your hands until it is tight, then tighten it a quarter turn more with a socket wrench.

MUFFLER

Periodically inspect the muffler for loose fasteners, damage or corrosion. If any sign of exhaust leakage is found, do not use the blower and have it repaired immediately. 1. Remove the muffler, insert a screwdriver into the vent, and wipe away any carbon buildup. Wipe away any carbon buildup on the muffler exhaust vent and cylinder exhaust port at the same time. 2. Tighten all screws, bolts, and fittings.

(4) (3) (1)

SPARK ARRESTER
The muffler is equipped with a spark arrester to prevent red hot carbon from flying out of the exhaust outlet. Periodically inspect and clean as necessary with a wire brush. (1) Bolt (3) Spark Arrester (2) Bolt (4) Diffuser
Before starting operation, always make sure to check if the muffler is properly held by the bolts (2). [350BT] [370BTS] [380BTS] Fastening Torque: [330BT] 7 to 11 Nm 8 to 12 Nm Also make sure that the spark arrester and the diffuser are properly attached with the bolts (1). (Fastening Torque : 2 to 3 Nm)
(2) [350BT] [370BTS] [380BTS]

AIR INLET NET

Blown air is taken in from the air inlet net. If the air flow drops during operation, stop the engine and inspect the air inlet net for blockage by obstacles. Note that failure to remove any such obstacles may result in the engine becoming overheated and damaged. (1) Net [330BT]

F31 (1)

Never use the blower without the net on the blower. Before each use, check that the net is attached in place and is free from any damage.
IGNITION COIL AIR GAP INSPECTION
If the gap is not accurate or when installing the coil or rotor, adjust the air gap between the ignition coil and the iron core of the rotor. Air Gap: [330BT] 0.35 mm (0.30 to 0.40 mm) 0.014 in (0.012 to 0.016 in) [350BT] [370BTS] [380BTS] 0.40 mm (0.35 to 0.45 mm) 0.016 in (0.014 to 0.017 in)
(1) Rotor (2) Ignition coil

SHOLDER STRAP

If the shoulder strap is damaged it may break during use, thus causing the product to fall and resulting in personal injury. Follow the instructions below to replace the shoulder strap with new one. Take off the clip from the strap. Pass the end of the strap through the hanger. Return the clip to the strap.
Make sure that the thick round bar of the clip is in the strap. If it is attached in the wrong way, it leads to serious personal injury.

Storage

BEFORE STORING THE BLOWER: 1. Drain the fuel tank and push the primer bulb until it becomes empty of fuel. 2. Remove the spark plug and drop a spoonful of 2-cycle oil into the cylider. Crank the engine several time and install the spark plug. 3. Store unit in a dry, cool and dark, well-ventilated, dust-free place, out of the reach of children.