336RK - Brush cutter HUSQVARNA - Free user manual and instructions

Product type	Brush cutter
Brand	Husqvarna
Model	336RK
Engine displacement	34.6 cm³
Max. engine output (ISO 8893)	1.4 kW at 8400 rpm
Recommended max. speed	11500 rpm
Speed of output shaft	8220 rpm
Idle speed	2900 rpm
Fuel tank capacity	0.6 L
Fuel/oil mixture ratio	1:50 (2%) with Husqvarna two-stroke oil
Catalytic converter muffler	Yes
Weight (without fuel, cutting attachment and guard)	7.4 kg
Sound power level (guaranteed LWA)	113 dB(A)
Vibration level (trimmer head, left/right)	3.5/5.0 m/s²
Spark plug	Champion RCJ6Y (gap 0.5 mm)
Cutting attachments (recommended)	Trimmer head, grass blade, saw blade, plastic blades
Harness quick release	Yes, front-mounted
Throttle lockout	Yes
Safety distance	15 m (50 ft)
Two-piece shaft	Yes (336RK model)
Bevel gear grease	Husqvarna special grease, check level regularly

Frequently Asked Questions - 336RK HUSQVARNA

What is the correct fuel mixture for the Husqvarna 336RK?

Use a 1:50 (2%) mixture of unleaded petrol (90 octane or higher) and Husqvarna two-stroke oil. For best results, use Husqvarna two-stroke oil.

How do I start the brush cutter?

1. Set choke to closed position. 2. Press primer bulb until fuel fills it. 3. Pull starter handle until engine fires. 4. Move choke to run position and apply full throttle. The start throttle lock disengages automatically.

What safety distance must I maintain from people and animals?

Always keep people and animals at least 15 meters (50 feet) from the machine. Use a safety zone of at least 15 m when working.

What type of cutting attachments can be used?

Approved attachments include trimmer heads (e.g., T35, T45x), grass blades, saw blades, and plastic blades. Always use the recommended guard for each attachment. See Technical data chapter.

How often should I clean the air filter?

Clean the air filter every 25 hours of operation, or more often in dusty conditions. Replace if damaged. For dusty conditions, oil the filter with Husqvarna filter oil.

What should I do if the cutting attachment rotates at idle?

Stop the engine immediately. Adjust the idle speed screw T counterclockwise until the cutting attachment stops. If the problem persists, contact a service workshop. Never use the machine if it cannot be adjusted.

What is blade thrust and how can I avoid it?

Blade thrust is a violent sideways kick when the blade hits a fixed object. To avoid it: cut only with the blade area between 3 and 5 o'clock, avoid cutting between 12 and 3 o'clock, and never use a dull or damaged blade.

How do I lubricate the two-piece shaft?

Lubricate the drive shaft end in the lower shaft coupling with grease every 30 hours of operation. Failure to lubricate may cause seizing.

What personal protective equipment (PPE) is required?

Always wear approved hearing protection, eye protection (ANSI Z87.1 or EN 166), heavy-duty gloves, non-slip boots with steel toe-caps, long pants, and a helmet if there is risk of falling objects.

How do I adjust the harness for proper balance?

For forest clearing, adjust the harness so the cutting attachment is angled slightly forward. For grass clearing, keep it parallel to the ground. Balance by moving the suspension ring on the shaft. The machine should hang horizontally.

USER MANUAL 336RK HUSQVARNA

Please read the operator's manual carefully and make sure you understand the instructions

before using the machine.

Simple line drawing of an open book enclosed in a circle (no text or symbols)

English

KEY TO SYMBOLS

Symbols

WARNING! 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:

• Wear a protective helmet where there is a risk of falling objects
  • Approved hearing protection
  • Approved eye protection

Max. speed of output shaft, rpm

This product is in accordance with applicable EC directives.

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 meters.

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 meters 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.

Primer bulb

Set the choke control in the choke position.

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

Starting instructions

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

The engine is switched off by moving the stop switch to the stop position.

CAUTION! The stop switch automatically returns to the start position. In order to prevent unintentional starting, the spark plug cap must be removed from the spark plug when assembling, checking and/or performing maintenance.

Always wear approved protective gloves.

Regular cleaning is required.

Visual check.

Approved eye protection must always be used.

CONTENTS

Contents

KEY TO SYMBOLS

Symbols 2

CONTENTS

Contents 3

INTRODUCTION

Dear Customer, 4

WHAT IS WHAT?

What is what on the brush cutter? 5

GENERAL SAFETY PRECAUTIONS

Note the following before starting: 6

Important 7

Personal protective equipment 7

Machine's safety equipment 8

Cutting equipment 11

ASSEMBLY

Assembling the handlebar and throttle 14

Assembling and dismantling the two-piece shaft . 14

Assembling the cutting equipment 15

Fitting the guard extension 15

Fitting a blade guard, grass blade and grass cutter 15

Fitting the blade guard and saw blade 16

Fitting other guards and cutting attachments ..... 16

Adjusting the harness and brush cutter 17

Standard harness 17

FUEL HANDLING

Fuel safety 19

Fuel 19

Fueling 20

STARTING AND STOPPING

Check before starting 21

Starting and stopping 21

WORKING TECHNIQUES

General working instructions 23

MAINTENANCE

Carburettor 28

Muffler 28

Cooling system 29

Bevel gear 29

Air filter 29

Two-piece shaft 30

Spark plug 30

Maintenance schedule 31

TECHNICAL DATA

Technical data 32

EC Declaration of Conformity 33

INTRODUCTION

Dear Customer,

Congratulations on your choice to buy a Husqvarna product! Husqvarna is based on a tradition that dates back to 1689, when the Swedish King Karl XI ordered the construction of a factory on the banks of the Husqvarna River, for production of muskets. The location was logical, since water power was harnessed from the Huskvarna River to create the water-powered plant. During the more than 300 years in existence, the Husqvarna factory has produced a lot of different products, from wood stoves to modern kitchen appliances, sewing machines, bicycles, motorcycles etc. In 1956, the first motor driven lawn mowers appeared, followed by chain saws in 1959, and it is within this area Husqvarna is working today.

Today Husqvarna is one of the leading manufacturers in the world of forest and garden products, with quality as our highest priority. The business concept is to develop, manufacture and market motor-driven products for forestry and gardening, as well as for the building and construction industry. Husqvarna's aim is also to be at the front edge for ergonomics, usability, security and environmental protection. That is the reason why we have developed many different features to add to our products within these areas.

We are convinced that you will appreciate with great satisfaction the quality and performance of our product for a very long time to come. The purchase of one of our products gives you access to professional help with repairs and service whenever this may be necessary. If the retailer who sells your machine is not one of our authorized dealers, ask for the address of your nearest service workshop.

It is our wish that you will be satisfied with your product and that it will be your companion for a long time. Think of this operator's manual as a valuable document. By following its content (usage, service, maintenance, etc), the life span and the second-hand value of the machine can be extended. If you sell this machine, make sure that the operator's manual is passed on to the buyer.

Thank you for using a Husqvarna product.

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.

WHAT IS WHAT?

What is what on the brush cutter?

1 Trimmer head
2 Grease filler cap, bevel gear
3 Bevel gear
4 Cutting attachment guard
5 Shaft
6 Handlebar
7 Throttle trigger
8 Stop switch
9 Throttle trigger lockout
10 Suspension ring
11 Cylinder cover
12 Starter handle
13 Fuel tank
14 Choke control
15 Primer bulb
16 Air filter cover

17 Handle adjustment
18 Locking nut
19 Support flange
20 Support cup
21 Drive disc
22 Blade
23 Operator's manual
24 Transport guard
25 Locking pin
26 Harness
27 Spark plug cap and spark plug
28 Start throttle button
29 Adjusting the throttle wire
30 Combination spanner
31 Guard extension
32 Shaft coupling

Note the following before starting:

• Please read the operator's manual carefully.
• Check that the cutting equipment is correctly fitted and adjusted.

WARNING! Long-term exposure to noise can result in permanent hearing impairment. So always use approved hearing protection.

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

WARNING! 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.

Important

IMPORTANT!

The machine is only designed for trimming grass, grass clearing and/or forestry clearing.

National or local regulations may regulate the use.

Comply to given regulations.

The only accessories you can operate with this engine unit are the cutting attachments we recommend in the chapter on Technical data.

Never use the machine if you are tired, if you are ill, if you have consumed alcohol, or if you are taking other drugs or medication that can affect your vision, judgement or co-ordination.

Wear personal protective equipment. See instructions under the "Personal protective equipment" heading.

Never use a machine that has been modified in any way from its original specification.

Never use a machine that is faulty. Carry out the safety checks, maintenance and service instructions described in this manual. Some maintenance and service measures must be carried out by trained and qualified specialists. See instructions under the Maintenance heading.

All covers, guards and handles must be fitted before starting. Ensure that the spark plug cap and ignition lead are undamaged to avoid the risk of electric shock.

The machine operator must ensure that no people or animals come closer than 15 meters while working. When several operators are working in the same area the safety distance should be at least twice the tree height and no less than 15 meters.

Carry out an overall inspection of the machine before use. See the maintenance schedule.

WARNING! This machine produces an electromagnetic field during operation. This field may under some circumstances interfere with active or passive medical implants. To reduce the risk of serious or fatal injury, we recommend persons with medical implants to consult their physician and the medical implant manufacturer before operating this machine.

WARNING! Running an engine in a confined or badly ventilated area can result in death due to asphyxiation or carbon monoxide poisoning.

WARNING! Never allow children to use or be in the vicinity of the machine. As the machine is equipped with a spring-loaded stop switch and can be started by low speed and force on the starter handle, even small children under some circumstances can produce the force necessary to start the machine. This can mean a risk of serious personal injury. Therefore remove the spark plug cap when the machine is not under close supervision.

Personal protective equipment

IMPORTANT!

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.

You must use approved personal protective equipment whenever you use the machine. Personal protective equipment cannot eliminate the risk of injury but it will reduce the degree of injury if an accident does happen. Ask your dealer for help in choosing the right equipment.

WARNING! 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

Wear a protective helmet where there is a risk of falling objects

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 the ANSI Z87.1 standard in the USA or EN 166 in EU countries.

GENERAL SAFETY PRECAUTIONS

GLOVES

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

BOOTS

Wear boots with steel toe-caps and non-slip sole.

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.

IMPORTANT! 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.

WARNING! 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.

Throttle trigger lockout

The throttle lockout 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 lockout 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.

Make sure the throttle control is locked at the idle setting when the throttle lockout is released.

Illustration of a robotic arm with a curved arrow indicating motion (no text or symbols)

Press the throttle lockout and make sure it returns to its original position when you release it.

Illustration of a robotic arm with an upward arrow indicating motion (no text or symbols)

Check that the throttle trigger and throttle lockout move freely and that the return springs work properly.

Diagram of a mechanical tool with directional arrows indicating motion (no text or symbols)

See instructions under the heading Start. Start the machine and apply full throttle. Release the throttle and

GENERAL SAFETY PRECAUTIONS

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.

Illustration of a worker using a tool to adjust or install a mechanical component (no text or symbols present)

Stop switch

Use the stop switch to switch off the engine.

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

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.

Technical line drawing of a mechanical linkage assembly (no text or symbols)

Check that the guard is undamaged and 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.

WARNING! 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 minimize vibration and make operation easier.

Technical line drawing of a mechanical assembly with no visible text or symbols

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.

Exploded view diagram of a mechanical assembly showing internal components (no text or labels)

Regularly check the vibration damping units for cracks or deformation.

WARNING! 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 brush cutter.

GENERAL SAFETY PRECAUTIONS

Certain harnesses also have a quick release fitted to the support hook.

Illustration of a hand adjusting a belt buckle, showing two hands and a belt buckle (no text or symbols)

Check that the harness straps are correctly positioned. Once the harness and machine have been adjusted, check that the harness quick release works correctly.

Muffler

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

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.

Line drawing of a mechanical device with mounting flanges and a central button (no text or symbols)

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.

Illustration of two backpacks emitting steam, with one showing a lid and starburst effect (no text or symbols)

For mufflers it is very important that you follow the instructions on checking, maintaining and servicing your machine.

Never use a machine that has a faulty muffler.

Prohibition sign of a skull with a diagonal line crossing through it, no text or symbols present.

Regularly check that the muffler is securely attached to the machine.

Line drawing of a mechanical switch or lever assembly (no text or symbols)

If the muffler on your machine is fitted with a spark arrestor mesh this must be cleaned regularly. A blocked mesh will cause the engine to overheat and may lead to serious damage.

Line drawing of a device with a labeled component (no text or symbols present)

WARNING! 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!

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

GENERAL SAFETY PRECAUTIONS

WARNING! Bear in mind that:

The exhaust fumes from the engine are hot and may contain sparks which can start a fire. Never start the machine indoors or near combustible material!

Locking nut

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

Technical line drawing of a mechanical device with a central hub and blade (no text or symbols)

When fitting, tighten the nut in the opposite direction to the direction of rotation of the cutting attachment. To remove it, undo the nut in the same direction as the cutting attachment rotates. (CAUTION! The nut has a left-hand thread.) Tighten the nut using the socket spanner.

Technical line drawing of a mechanical component with a rotating knob and a cross-shaped component (no text or symbols)

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.

Cutting equipment

This section describes how to choose and maintain your cutting equipment in order to:

• Reduce the risk of blade thrust.
• Obtain maximum cutting performance.
• Extend the life of cutting equipment.

IMPORTANT!

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.

WARNING! 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 spark plug cap before you start to work on it.

WARNING! Using an incorrect cutting attachment or an incorrectly sharpened blade increases the risk of blade thrust.

Cutting equipment

Saw blades are intended for cutting fibrous types of wood.

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

A trimmer head is intended for trimming grass.

Line drawing of a symmetrical mechanical or ergonomic device with no visible text or symbols

GENERAL SAFETY PRECAUTIONS

General rules

Only use cutting attachments with the guards we recommend! See the chapter on Technical data.

Four abstract line drawings: a circular shape, a star-like shape, a triangular prism, and a cylindrical object with a coiled cable (no text or symbols)

Keep the teeth of the blade correctly sharpened! Follow our instructions and use the recommended file gauge. An incorrectly sharpened or damaged blade increases the risk of accidents.

Simple line drawing of a halter with an arrow indicating upward motion (no text or symbols)

Keep the correct setting on the saw blade! Follow our instructions and use the recommended setting tool. An incorrectly set saw blade increases the risk of jamming and blade thrust, and damage to the saw blade.

Illustration of a tool and a hand holding a tool, showing mechanical components and motion (no text or symbols)

Check the cutting attachment for damage or cracks. A damaged cutting attachment should always be replaced.

graph TD
    A["Circle object"] --> B["Cylinder with rotating coil"]
    B --> C["Rectangular component"]

Sharpening grass knives and grass blades

- See the cutting attachment packaging for correct sharpening instructions. Sharpen blades and knives using a single-cut flat file.

- Sharpen all edges equally to maintain the balance of the blade.

Two diagrams showing a tool interacting with a shield-like shape, one with an arrow indicating direction (no text or symbols)

WARNING! 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.

Sharpening the saw blade

• See the cutting attachment packaging for correct sharpening instructions.

A correctly sharpened blade is essential for working efficiently and to avoid unnecessary wear to the blade and brush cutter.

Illustration of a worker in safety gear handling a tool, with an inset showing detailed teeth structure (no text or symbols)

- 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

GENERAL SAFETY PRECAUTIONS

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.

Diagram showing two mechanical components with arrows indicating motion direction (no text or symbols)

Trimmer head

IMPORTANT!

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

- 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.

Three technical line drawings of household appliances: a cylindrical fan, a washing machine, and a cylindrical bed (no text or symbols)

- 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 before use. This will make the cord tougher so that it lasts longer.

ASSEMBLY

Assembling the handlebar and throttle

• Remove the screw at the rear of the throttle handle.
• Slide the throttle handle onto the right side of the handlebar, (see diagram).

Line drawing of a mechanical device with a curved handle and arrow indicating downward motion (no text or symbols)

• 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.

Pure mechanical diagram showing a lever and connecting rod assembly without any text or symbols

• Fit the mounting components as shown.
• 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.

Illustration of a person wearing safety gear and holding a long tool, with motion arrows indicating movement (no text or symbols)

Assembling and dismantling the two-piece shaft

Assembly

• Loosen the coupling by turning the knob counterclockwise.
• Align the tab of the attachment (A) with the arrow on the coupling (B).

Technical line drawing of a mechanical component labeled A and B, showing no text or symbols beyond labels

Push the attachment into the coupling until the attachment snaps into place.

Technical line drawing of a mechanical clamp or connector with two directional arrows indicating movement (no text or symbols)

Before using the unit, tighten the knob securely.

Mechanical assembly diagram showing a rotating lever mechanism with no text or symbols

Dismantling

Loosen the coupling by turning the knob (at least 3 times).

Mechanical clamp or bracket assembly with black bands and a metallic connector (no text or symbols)

ASSEMBLY

Push and hold the button (C). While securely holding the engine end, pull the attachment straight out of the coupling.

Mechanical assembly diagram showing a pipe fitting with arrows indicating direction (no text or symbols)

Assembling the cutting equipment

WARNING!

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.

Technical line drawing of a mechanical assembly with cross-sectional views (no text or symbols)

WARNING! 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.

IMPORTANT! 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 guard extension

CAUTION! The guard extension shall always be fitted when using the trimmer head/plastic blades and combination guard. The guard extension shall always be removed when using the grass blade and combination guard.

Enter the guard extension guide in the slot of the combination guard. Then click the guard extension into position on the guard with the four quick-fasteners.

Line drawing of a hand holding a tool on a mechanical component (no text or symbols)

The guard extension is removed easily using the spark plug spanner, see illustration.

Line drawing of a hand using a tool to adjust or install a mechanical component (no text or symbols)

Fitting a blade guard, grass blade and grass cutter

- Hook the blade guard/combination guard (A) onto the fitting on the shaft and secure with the bolt.

CAUTION! Ensure that the guard extension is removed.

Use the recommended blade guard. See the Technical data section.

- Fit the drive disc (B) on the output shaft.

- Turn the output 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.

- Place the blade (D), support cup (E) and support flange (F) on the output shaft.

- Fit the nut (G). The nut must be tightened to a torque of 35-50 Nm. Use the spanner in the tool kit. Hold the

ASSEMBLY

shaft of the spanner as close to the blade guard as possible. To tighten the nut, turn the spanner in the opposite direction to the direction of rotation (Caution! left-hand thread).

Technical line drawing of a mechanical component with no visible text or symbols

Fitting the blade guard and saw blade

Technical line drawing of two mechanical components with no visible text or symbols

- Remove the mounting plate (H). Fit the adapter (I) and bracket (J) with the two screws (K) as shown. Fit the blade guard (A) to the adapter using the 4 screws (L) as shown.

CAUTION! Use the recommended blade guard. See the Technical data section.

• Fit the drive disc (B) on the output shaft.

- Turn the output 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.

- Place the blade (D) and support flange (F) on the output shaft.

- Fit the nut (G). The nut must be tightened to a torque of 35-50 Nm. Use the spanner in the tool kit. Hold the shaft of the spanner as close to the blade guard as possible. To tighten the nut, turn the spanner in the opposite direction to the direction of rotation (Caution! left-hand thread).

Line drawing of a hand operating a gear with a rotating wheel (no text or symbols)

- When loosening and tightening the saw blade nut, there is a risk of injury from the teeth of the saw blade. You should therefore always ensure that your hand is shielded by the blade guard when doing this. Always use a socket spanner with a shaft that is long enough to allow this. The arrow in the diagram shows the area where you should operate the socket spanner when loosening or tightening the nut.

Mechanical gear assembly diagram showing teeth and mounting points (no text or labels)

Fitting other guards and cutting attachments

- Fit the trimmer guard/combination guard (A) intended for use with the trimmer head/plastic blades. CAUTION! Ensure that the guard extension is fitted. Hang the trimmer guard/combination guard (A) on the two hooks on the plate holder (M). Bend the guard around the shaft and tighten it with the bolt (L) on the opposite side of the shaft. Use the locking pin (C).

ASSEMBLY

Place the locking pin in the groove on the screw head and tighten. See diagram.

- Fit the drive disc (B) on the output shaft.

• Turn the output 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) counter clockwise.

Technical line drawing of a mechanical component with two views (top and side), showing internal components and directional arrows (no text or symbols)

- To dismantle, follow the instructions in the reverse order.

Adjusting the harness and brush cutter

WARNING! When using a brush cutter it must always be hooked securely to the harness. Otherwise you will be unable to control the brush cutter safely and this can result in injury to yourself or others. Never use a harness with a defective quick release.

Standard harness

Quick release

At the front is an easily accessible, quick release. Use this if the engine catches fire or in any other emergency situation that requires you to free yourself from the machine and harness.

Illustration of hands adjusting a belt buckle with arrows indicating motion (no text or symbols)

Spreading the load on your shoulders

A well-adjusted harness and machine makes work much easier. Adjust the harness for the best working position. Tension the side straps so that the weight is evenly distributed across both shoulders.

Cartoon illustration of a person with headband and downward arrow (no text or symbols)

Correct height

1 Forestry clearing

The machine should be supported in a harness when forestry clearing so that the cutting equipment is angled slightly forwards in relation to the ground. Adjust the height using the strap on the harness for the support hook.

Illustration of two workers using a tool to clean or walk (no text or symbols present)

2 Grass clearing

The machine should be supported in a harness when grass clearing so that the cutting equipment is parallel to the ground.

Illustration of a worker in safety gear using a tool to clean or walk (no text or symbols)

Correct balance

1 Forestry clearing

The machine is balanced by moving the suspension ring on the machine forwards or backwards. On some models the suspension ring is fixed, however, this will then have a number of holes for the support hook. The machine is correctly balanced when it freely hangs horizontally from the support hook. In this way the risk of hitting stones is reduced if you need to release the handlebar.

Illustration of a worker using a tool to measure a mechanical component, with no visible text or symbols.

2 Grass clearing

Let the blade balance at a comfortable cutting height, i.e. close to the ground.

Illustration of a person wearing safety gear and holding a long tool (no text or symbols)

Fuel safety

Never start the machine:

1 If you have spilled fuel on it. Wipe off the spillage and allow remaining fuel to evaporate.
2 If you have spilled 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. In the event of leakage, contact your service agent.

Transport and storage

• Store and transport the machine and fuel so that there is no risk of any leakage or fumes coming into contact with sparks or open flames, for example, from electrical machinery, electric motors, electrical relays/ switches or boilers.
• When storing and transporting fuel always use approved containers intended for this purpose.
• When storing the machine for long periods the fuel tank must be emptied. Contact your local petrol station to find out where to dispose of excess fuel. Drain the tank into the appropriate containers and in a well ventilated area.
• Ensure the machine is cleaned and that a complete service is carried out before long-term storage.
• The transport guard must always be fitted to the cutting attachment when the machine is being transported or in storage.
• Secure the machine during transport.
• In order to prevent unintentional starting of the engine, the spark plug cap must always be removed during long-term storage, if the machine is not under close supervision and when performing all service measures.
• Allow the machine to cool before putting it in storage.

WARNING! Take care when handling fuel. Bear in mind the risk of fire, explosion and inhaling fumes.

Fuel

CAUTION! The machine is equipped with a two-stroke engine and must always be run using a mixture of petrol and two-stroke 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.

WARNING! Fuel and fuel fumes are highly flammable and can cause serious injury when inhaled or allowed to come in contact with the skin. For this reason observe caution when handling fuel and make sure there is adequate ventilation.

Petrol

CAUTION! Always use a quality petrol/oil mixture at least 90 octane (RON). 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.

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

- The lowest octane recommended is 90 (RON). If you run the engine on a lower octane grade than 90 so-called knocking can occur. This gives rise to a high engine temperature, which can result in serious engine damage.

- When working at continuous high revs a higher octane rating is recommended.

Environment fuel

HUSQVARNA recommends the use of alkylate fuel, either Aspen two-stroke fuel or environmental fuel for four-stroke engines blended with two-stroke oil as set out below. Note that carburettor adjustment may be necessary when changing the type of fuel (see the instructions under the heading Carburettor).

Two-stroke oil

• For best results and performance use HUSQVARNA two-stroke engine oil, which is specially formulated for our air-cooled two-stroke engines.
• Never use two-stroke oil intended for water-cooled engines, sometimes referred to as outboard oil (rated TCW).
• Never use oil intended for four-stroke engines.
• A poor oil quality and/or too high oil/fuel ratio may jeopardise function and decrease the life time of catalytic converters.
• Mixing ratio 1:50 (2%) with HUSQVARNA two-stroke oil.

FUEL HANDLING

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

Mixing

• Always mix the petrol and oil in a clean container intended for fuel.
• Always start by filling half the amount of the petrol to be used. Then add the entire amount of oil. Mix (shake) the fuel mixture. Add the remaining amount of petrol.
- Mix (shake) the fuel mixture thoroughly before filling the machine's fuel tank.

• Do not mix more than one month's supply of fuel at a time.
• If the machine is not used for some time the fuel tank should be emptied and cleaned.

WARNING! The catalytic converter muffler gets very hot during and after use. This also applies during idling. Be aware of the fire hazard, especially when working near flammable substances and/or vapours.

Fueling

WARNING! Taking the following precautions, will lessen the risk of fire:

Mix and pour fuel outdoors, where there are no sparks or flames.

Do not smoke or place hot objects near fuel.

Always shut off the engine before refuelling.

Always stop the engine and let it cool for a few minutes before refuelling. Refuel in a well ventilated area. Never fuel the machine indoors.

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 and source before starting.

• Always use a fuel container with an anti-spill valve.
- If you have spilled fuel on it. Wipe off the spillage and allow remaining fuel to evaporate.
- Clean the area around the fuel cap. Contamination in the tank can cause operating problems.
- Ensure that the fuel is well mixed by shaking the container before filling the tank.

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.

Three hand-drawn diagrams showing a curved surface with arrows indicating direction, no text or symbols present.

- 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.

Simple line drawing of a circular ring with a downward arrow pointing to its center (no text or symbols)

- 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.

Technical line drawing of a mechanical component with an arrow indicating direction (no text or symbols)

- 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.

Technical line drawing of a mechanical device with no visible text or symbols

• Never use the machine without a guard nor with a defective guard.
• All covers must be correctly fitted and undamaged before you start the machine.

Starting and stopping

WARNING! 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 and source 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 meters.

Starting

Choke: Set the choke control in the choke position.

STARTING AND STOPPING

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

Mechanical component diagram showing a valve or connector with an arrow pointing to a component (no text or symbols present)

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

Hold the body of the machine on the ground using your left hand (CAUTION! 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. Never twist the starter cord around your hand.

Repeat pulling the start handle until the engine starts. When the engine starts, return choke control to run position and apply full throttle; the throttle will automatically disengage from the start setting.

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.

Illustration of a worker in hard hat and uniform handling equipment (no text or symbols)

CAUTION! Do not put any part of your body in marked area. Contact can result in burns to the skin, or electrical shock if the spark plug cap has been damaged. Always use gloves. Do not use a machine with damaged spark plug cap.

Technical line drawing of a mechanical component with no visible text or symbols

For throttle handles with a start throttle lock:

Set the throttle to the start position by first pressing the throttle lockout and the throttle trigger, then pressing the start throttle button (A). Then release the throttle lockout 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 lockout and throttle trigger again.

Line drawing of a mechanical component with labeled point A (no text or symbols beyond label)

Stopping

Stop the engine by switching off the ignition.

Line drawing of a mechanical device with a handle and central knob (no text or symbols)

CAUTION! The stop switch automatically returns to the start position. In order to prevent unintentional starting, the spark plug cap must be removed from the spark plug when assembling, checking and/or performing maintenance.

General working instructions

IMPORTANT!

This section describes the basic safety precautions for working with brush cutters and trimmers.

If you encounter a situation where you are uncertain how to proceed you should ask an expert. Contact your dealer or your service workshop.

Avoid all usage which you consider to be beyond your capability.

You must understand the difference between forestry clearing, grass clearing and grass trimming before use.

Basic safety rules

1 Look around you:

• To ensure that people, animals or other things cannot affect your control of the machine.
• To ensure that people, animals, etc., do not come into contact with the cutting attachment or loose objects that are thrown out by the cutting attachment.
• CAUTION! Do not use the machine unless you are able to call for help in the event of an accident.
  2 Inspect the working area. Remove all loose objects, such as stones, broken glass, nails, steel wire, string, etc. that could be thrown out or become wrapped around the cutting attachment.
  3 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.
  4 Make sure you can move and stand safely. Check the area around you for possible obstacles (roots, rocks, branches, ditches, etc.) in case you have to move suddenly. Take great care when working on sloping ground.

Line drawing of a person using a manual lawn to clean grass near a tree (no text or symbols)

5 Take great care when cutting a tree that is in tension. A tree that is in tension may spring back to its normal position before or after being cut. If you position

yourself incorrectly or make the cut in the wrong place the tree may hit you or the machine and cause you to lose control. Both situations can cause serious personal injury.

Simple line drawing of a tree with leaves and a log, no text or symbols present

6 Keep a good balance and a firm foothold. Do not overreach. Keep proper footing and balance at all times.
7 Always hold the machine with both hands. Hold the machine on the right side of your body. Connect the machine to the suspension ring on the harness Keep all parts of your body away from the hot surfaces. Keep all parts of your body away from the rotating cutting attachment.

Line drawing of a person wearing a full-body safety harness and holding a metal detector (no text or symbols)

8 Keep the cutting attachment below waist level.
9 Switch off the engine before moving to another area. Fit the transport guard before carrying or transporting the equipment any distance.
10 Never put the machine down with the engine running unless you have it in clear sight.

WARNING! Neither the operator of the machine nor anyone else may attempt to remove the cut material while the engine is running or the cutting equipment is rotating, as this can result in serious injury.

Stop the engine and cutting equipment before you remove material that has wound around the blade shaft as otherwise there is a risk of injury. The bevel gear can get hot during use and may remain so for a while afterwards. You could get burnt if you touch it.

WORKING TECHNIQUES

WARNING! Watch out for thrown objects. Always wear approved eye protection. Never lean over the cutting attachment guard. Stones, rubbish, etc. can be thrown up into the eyes causing blindness or serious injury.

Keep unauthorised persons at a distance. Children, animals, onlookers and helpers should be kept outside the safety zone of 15 metres. Stop the machine immediately if anyone approaches. Never swing the machine around without first checking behind you to make sure no-one is within the safety zone.

WARNING! Sometimes branches or grass get caught between the guard and cutting attachment. Always stop the engine before cleaning.

Working methods

WARNING! 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. This is called blade thrust. A blade thrust can be violent enough to cause the machine and/or operator to be propelled in any direction, and possibly lose control of the machine. Blade thrust can occur without warning if the machine snags, stalls or binds. Blade thrust is more likely to occur in areas where it is difficult to see the material being cut.

Avoid cutting with the area of the blade between the 12 o'clock and 3 o'clock positions. Because of the speed of rotation of the blade, blade thrust can occur if you attempt to cut thick stems with this area of the blade.

• Before you start clearing, check the clearing area, the type of terrain, the slope of the ground, whether there are stones, hollows etc.
• Start at whichever end of the area is easiest, and clear an open space from which to work.
  • Work systematically to and fro across the area, clearing a width of around 4-5 m on each pass. This exploits the full reach of the machine in both directions

and gives the operator a convenient and varied working area to work in.

graph TD
    A["Root"] --> B{Evolution}
    B --> C["Leaf Growth"]
    C --> D["Survival"]
    D --> E["Plant Release"]
    E --> F["Forest Management"]
    F --> G["Evapot Recovery"]
    G --> H["Plant Retention"]
    H --> I["Forest Stabilization"]
    I --> J["Evapot Restoration"]
    J --> K["Plant Removal"]
    K --> L["Forest Infiltration"]

• Clear a strip around 75 m long. Move your fuel can as work progresses.
• On sloping ground you should work along the slope. It is much easier to work along a slope than it is to work up and down it.
• You should plan the strip so that you avoid going over ditches or other obstacles on the ground. You should also orient the strip to take advantage of wind conditions, so that cleared stems fall in the cleared area of the stand.

Line drawing of a person walking on a path with trees and a dashed line indicating a path (no text or symbols)

Forestry clearing using a saw blade

- The risk of blade thrust increases with increasing stem size. You should therefore avoid cutting with the area of the blade between 12 o'clock and 3 o'clock.

• To fell to the left, the bottom of the tree should be pushed to the right. Tilt the blade and bring it diagonally down to the right, exerting firm pressure. At

WORKING TECHNIQUES

the same time push the stem using the blade guard. Cut with the area of the blade between 3 o'clock and 5 o'clock. Apply full throttle before advancing the blade.

Illustration showing a tree with a stick and a person holding a tree with a circular object nearby (no text or symbols)

- To fell to the right, the bottom of the tree should be pushed to the left. Tilt the blade and bring it diagonally up to the right. Cut with the area of the blade between 3 o'clock and 5 o'clock so that the direction of rotation of the blade pushes the bottom of the tree to the left.

Illustration showing a manual hammer on a tree with an arrow indicating direction, and a stick figure holding a tree with a gear (no text or symbols)

- To fell a tree forwards, the bottom of the tree should be pulled backwards. Pull the blade backwards with a quick, firm movement.

Simple line drawing of a person with a large circular object and a downward arrow, no text or symbols present.

• Large stems must be cut from two sides. First determine which direction the stem will fall. Make the first cut on the felling side. Then finish cutting the stem from the other side. Adjust the cutting pressure to match the size of the stem and the hardness of the

wood. Small stems require more pressure, while large stems require less pressure.

• If the stems are tightly packed, adapt your walking pace to suit.
• If the blade jams in a stem, never jerk the machine free. If you do this the blade, bevel gear, shaft or handlebar may be damaged. Release the handles, grip the shaft with both hands and gently pull the machine free.

Brush cutting with a saw blade

• Thin stems and brush are mown down. Work with a sawing movement, swinging sideways.
• Try to cut several stems in a single sawing movement.
• With groups of hardwood stems, first clear around the group. Start by cutting the stems high up around the outside of the group to avoid jamming. Then cut the stems to the required height. Now try to reach in with the blade and cut from the centre of the group. If it is still difficult to gain access, cut the stems high up and let them fall. This will reduce the risk of jamming.

Illustration of a person using a tool to spread leafy plants around a central plant (no text or symbols)

WORKING TECHNIQUES

Grass clearing using a grass blade

• Grass blades and grass knives must not be used on woody stems.
• A grass blade is used for all types of tall or coarse grass.
• The grass is cut down with a sideways, swinging movement, where the movement from right-to-left is the clearing stroke and the movement from left-to-right is the return stroke. Let the left-hand side of the blade (between 8 and 12 o'clock) do the cutting.

Illustration of a hand operating a pulley system with pine needles (no text or symbols)

• If the blade is angled to the left when clearing grass, the grass will collect in a line, which makes it easier to collect, e.g. by raking.
• Try to work rhythmically. Stand firmly with your feet apart. Move forward after the return stroke and stand firmly again.
• Let the support cup rest lightly against the ground. It is used to protect the blade from hitting the ground.
• Reduce the risk of material wrapping around the blade by following these instructions:

1 Always work at full throttle.

2Avoid the previously cut material during the return stroke.

- Stop the engine, unclip the harness and place the machine on the ground before you start to collect the cut material.

Grass trimming with a trimmer head

Trimming

- Hold the trimmer head just above the ground at an angle. It is the end of the cord that does the work. Let the cord work at its own pace. Never press the cord into the area to be cut.

Simple line drawing of a grassy slope with a small shrub and a tool, no text or symbols present.

• The cord can easily remove grass and weeds up against walls, fences, trees and borders. However it

can also damage sensitive bark on trees and bushes, and damage fence posts.

- Reduce the risk of damaging plants by shortening the cord to 10-12 cm and reducing the engine speed.

Clearing

- The clearing technique removes all unwanted vegetation. Keep the trimmer head just above the ground and tilt it. Let the end of the cord strike the ground around trees, posts, statues and the like. CAUTION! This technique increases the wear on the cord.

Simple line drawing of a grassy field with a small utility pole and a tool, no text or symbols present.

• The cord wears quicker and must be fed forward more often when working against stones, brick, concrete, metal fences, etc., than when coming into contact with trees and wooden fences.
• When trimming and clearing, you should use less than full throttle (80%) so that the cord lasts longer and to reduce the wear on the trimmer head.

Cutting

- The trimmer is ideal for cutting grass that is difficult to reach using a normal lawn mower. Keep the cord parallel to the ground when cutting. Avoid pressing the trimmer head against the ground as this can ruin the lawn and damage the tool.

Simple line drawing of a grassy field with a small mechanical component above it (no text or symbols)

- Do not allow the trimmer head to constantly come into contact with the ground during normal cutting. Constant contact of this type can cause damage and wear to the trimmer head.

Sweeping

- The fan effect of the rotating cord can be used for quick and easy clearing up. Hold the cord parallel to

WORKING TECHNIQUES

and above the area to be swept and move the tool side to side.

Diagram of a hand holding a mechanical lever with directional arrows indicating motion (no text or symbols)

- When cutting and sweeping you should use full throttle to obtain the best results.

IMPORTANT!

To avoid unbalance and vibrations in handles trimmer head cover need to be cleaned every time cord is refilled. In addition, check other part of the head if needed to be cleaned.

MAINTENANCE

Carburettor

Always wear approved protective gloves.

Your Husqvarna product has been designed and manufactured to specifications that reduce harmful emissions.

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.

CAUTION! 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.

Adjustment of the idle speed

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 counter clockwise 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.

WARNING! 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.

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.

WARNING! 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

CAUTION! 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.

Technical line drawing of an electric motor with mounting bracket and side-mounted buttons (no text or symbols)

MAINTENANCE

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.

Line drawing of a device with a labeled component (no text or symbols present)

CAUTION! Never use a machine with a defective muffler.

WARNING! 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!

Cooling system

To keep the working temperature as low as possible the machine is equipped with a cooling system.

The cooling system consists of:

1 Air intake on the starter.
2 Cooling fins on the cylinder.
3 Cylinder cover (directs cold air over the cylinder).

Clean the cooling system with a brush once a week, more often in demanding conditions. A dirty or blocked cooling system results in the machine overheating which causes damage to the piston and cylinder.

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.

Diagram of a mechanical component with a black arrow pointing to a specific part (no text or symbols present)

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

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.

Exploded view diagram of a mechanical device showing internal components and housing (no text or labels)

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.

MAINTENANCE

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. 531 00 92-48. 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.

Three-step illustration showing a dropper pouring liquid into a container, adding a sample, and handling a tool with a handle (no text or symbols)

Two-piece shaft 336RK

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.

Technical line drawing of a mechanical clamp or connector assembly with arrows indicating motion (no text or symbols)

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.

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

MAINTENANCE

Maintenance schedule

The following is a list of the maintenance steps that must be performed on the machine. Most of the items are described in the Maintenance section. The user must only carry out the maintenance and service work described in this Operator's Manual. More extensive work must be carried out by an authorized service workshop.

Maintenance	Daily maintenance	Weekly maintenance	Monthly maintenance
Clean the outside of the machine. X
Check that the harness is not damaged. X
Check that the suspension ring is not damaged. X
Make sure the throttle trigger lock and the throttle function correctly from a safety point of view.	X
Check that the stop switch works correctly. X
Check that the handle and handlebar are undamaged and secured correctly.	X
Check that the cutting attachment does not rotate at idle. X
Clean the air filter. Replace if necessary. X
Check that the guard is undamaged and not cracked. Replace the guard if it has been exposed to impact or is cracked.	X
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.	X
Check that the trimmer head is undamaged and not cracked. Replace the trimmer head if necessary.	X
Check that the locking nut of the cutting equipment is tighten correctly.	X
Check that nuts and screws are tight. X
Check that there are no fuel leaks from the engine, tank or fuel lines. X
Check that the transport guard for the blade is intact and that it can be secured correctly.	X
Check the starter and starter cord. X
Check that the vibration damping elements are not damaged. X
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.		X
Clean the machine's cooling system. X
Clean or replace the spark arrestor mesh on the muffler (only applies to mufflers without a catalytic converter).		X
Clean the outside of the carburettor and the space around it. X
Check that the bevel gear is filled three-quarters full with lubricant. Fill if necessary using special grease.		X
Lubricate the drive shaft end in the lower shaft coupling. X
Check that the safety release on the harness is not damaged and works.			X
Check the fuel filter for contamination and the fuel hose for cracks or other defects. Replace if necessary.			X
Check all cables and connections.			X
Replace the spark plug. Check that the spark plug is fitted with a suppressor.			X
Check and clean the spark arrestor mesh on the muffler (only applies to mufflers fitted with a catalytic converter).			X

TECHNICAL DATA

Technical data

Technical data 135R 336FR 336RK

Engine

Cylinder displacement, cm^3	34,6 34,6 34,6
Cylinder bore, mm 38,0 38,0 38,0
Stroke, mm 30,5 30,5 30,5
Idle speed, rpm 2900 2900 2900
Recommended max. speed, rpm 11500 11500 11500
Speed of output shaft, rpm 8220 8220 8220
Max. engine output, acc. to ISO 8893, kW/ rpm	1,4/8400	1,4/8400	1,4/8400
Catalytic converter muffler	Yes	Yes	Yes
Speed-regulated ignition system	Yes	Yes	Yes
Ignition system
Spark plug	Champion RCJ6Y	Champion RCJ6Y	Champion RCJ6Y
Electrode gap, mm	0,5	0,5	0,5
Fuel and lubrication system
Fuel tank capacity, litre	0,6	0,6	0,6
Weight
Weight without fuel, cutting attachment and guard, kg	6,8	7,0	7,4
Noise emissions(see note 1)
Sound power level, measured dB(A)	112	112	112
Sound power level, guaranteed LWA dB(A)	113	113	113
Noise levels(see note 2)
Equivalent sound pressure level at the operator's ear, measured according to EN ISO 11806 and ISO 22868, dB(A):
Equipped with trimmer head (original)	97	98	98
Equipped with grass blade (original)	98	98	98
Equipped with saw blade (original)	-	97	97
Vibration levels(see note 3)
Equivalent vibration levels ( a_hv,eq ) at handles, measured according to EN ISO 11806 and ISO 22867, m/s ^2
Equipped with trimmer head (original), left/right	2,4/2,1	2,3/2,2	3,5/5,0
Equipped with grass blade (original), left/right	2,9/2,5	2,8/2,5	4,3/2,9
Equipped with saw blade (original), left/right	-	3,7/2,7	3,4/3,0

Note 1: Noise emissions in the environment measured as sound power ( L_WA ) in conformity with EC directive 2000/14/EC. Reported sound power level for the machine has been measured with the original cutting attachment that gives the highest level. The difference between guaranteed and measured sound power is that the guaranteed sound power also includes dispersion in the measurement result and the variations between different machines of the same model according to Directive 2000/14/EC.
Note 2: Reported data for equivalent sound pressure level for the machine has a typical statistical dispersion (standard deviation) of 1 dB(A).
Note 3: Reported data for equivalent vibration level has a typical statistical dispersion (standard deviation) of 1 m/s^2 .

TECHNICAL DATA

Approved accessories Type Cutting	attachment guard, Art. no.
Centre hole in blades/cutters, ∅ 25,4 mm
Output shaft thread M12
Grass blade/grass cutter	Multi 255-3 (∅ 255 3 teeth) 537 33 16-01
	Grass 255-4 (∅ 255 4 teeth) 537 33 16-01
	Multi 275-4 (∅ 275 4 teeth) 537 33 16-01
	Multi 300-3 (∅ 300 3 teeth) 537 33 16-01
Saw blade Scarlet 200-22 (∅ 200 22 teeth) 537 38 77-01
Plastic blades	Tricut ∅ 300 mm (Separate blades have part number 531 01 77-15)	537 33 16-01 / 537 34 94-01
Trimmer head	T35, T35x (∅ 2.4 - 3.0 mm cord) 537 33 16-01 / 537 34 94-01
	S35 (∅ 2.4 - 3.0 mm cord) 537 33 16-01 / 537 34 94-01
	T45x (∅ 2.7 - 3.3 mm cord) 537 33 16-01 / 537 34 94-01
	Auto 55 (∅ 2.7 - 3.3 mm cord) 537 33 16-01 / 537 34 94-01
	Trimmy S II (∅ 2.4 - 3.3 mm cord) 537 33 16-01 / 537 34 94-01
	Alloy (∅ 2,0 - 3,3 mm cord) 537 33 16-01 / 537 34 94-01
Support cup	503 89 01-02	-

The following attachments are recommended for the specified models.

Attachments	Art No.	Use with
Brushcutter attachment with BCA 850 shaft.	967 02 67-01	336RK
Clearing saw attachment with CSA 850 shaft.	967 02 69-01	336RK
Trimmer attachment with shaft GTA 850 967 11 31	-01 336RK

EC Declaration of Conformity (Applies to Europe only)

We, Husqvarna AB, SE-561 82 Huskvarna, Sweden, tel: [phone], declare that the brush cutters Husqvarna 135R, 336FR, 336RK with serial numbers dating from 2016 onwards (the year is clearly stated on the rating plate, followed by the serial number), comply with the requirements of the COUNCIL'S DIRECTIVE:

• of May 17, 2006 "relating to machinery" 2006/42/EC.
• of February 26, 2014 "relating to electromagnetic compatibility" 2014/30/EU.
• of May 8, 2000 "relating to the noise emissions in the environment" 2000/14/EC. Conformity assessment according to Annex V. For information relating to noise emissions, see the Technical data chapter.

The following standards have been applied:

EN ISO 12100:2010, EN ISO 11806-1:2011, ISO 14982:1998, CISPR 12:2007

SMP Svensk Maskinprovning AB, Box 7035, SE-750 07 Uppsala, Sweden, has performed voluntary type examination on behalf of Husqvarna AB. The certificates are numbered:

SEC/11/2288 - 135R, SEC/11/2289 - 336FR, SEC/11/2289 - 336RK

SMP Svensk Maskinprovning AB has also verified agreement with appendix V of the council's directive 2000/14/EG. The certificate has the number:

01/164/069 - 135R, 01/164/069 - 336FR, 01/164/078 - 336RK

Huskvarna March 30, 2016

Per Gustafsson, Development manager (Authorized representative for Husqvarna AB and responsible for technical documentation.)

Tri Cut
1			2
3		4
6			7
8
S35
1	2		3
4	5
6	7		8
1		11
1		2
3		4
5
A		B

T35, T35x
		3
4
6	7	8
9
T45, T45x
		3
	5
	7		8
9
Auto 55

Trimmy SII
1		2
3	4 →
5	6		7
8		9

Trimmy SII
1	-AA83]	3
		4
Alloy
1	ø 2,0 - 2,4 mm/.080-.095"	2
	ø 2,0 - 3,3 mm/.080-.130"
3	4	5

Original instructions

1155638-26