Jonsered BC 2128 User Manual

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Operator’s manual

GB (2-27)

Manual d’utilisation

FR (28-53)

Manual de instrucciones

ES (54-79)

Please read these instructions and make sure you understand them before using the machine. Lire attentivement et bien assimiler le manuel d’utilisation avant d’utiliser la machine.

Lea detenidamente el manual de instrucciones y asegúrese de entender su contenido antes de utilizar la máquina.



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:

SA protective helmet where there is a risk of falling objects

S Hearing protection

S Approved eye protection

Max. speed of output shaft, rpm

Beware of thrown objects and ricochets.

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

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

Arrows which show limits for handle mounting.

Always wear approved protective gloves.

Use anti--slip and stable boots.

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

heads with trimmer line.

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This product is in accordance with applicable EC directives.

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

Sound pressure level at 7,5 metres.

Use unleaded or quality leaded petrol and two--stroke oil mixed at a ratio of 2% (1:50).

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

Stop the engine by pushing and holding the stop switch

in 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.

Regular cleaning is required.

Visual check.

Approved eye protection must always be used.





Symbols . . . . . . . . . . . . . . . . . . . . . . . . . 2


Contents . . . . . . . . . . . . . . . . . . . . . . . . 3 Note the following before starting . . . . 3


What is what? . . . . . . . . . . . . . . . . . . . 4


Important . . . . . . . . . . . . . . . . . . . . . . . . 5

Personal protective equipment . . . . . . 5 Machine’s safety equipment . . . . . . . . 6 Cutting equipment . . . . . . . . . . . . . . . . . 8


Fitting the handlebar . . . . . . . . . . . . . . . 10 Fitting the harness and harness clamp 10 Fitting blades and trimmer heads . . . . 11 Fitting a blade guard, grass blade and grass cutter . . . . . . . . . . . . . . . . . . . . . . 11 Fitting the trimmer guard and

trimmer head . . . . . . . . . . . . . . . . . . . . . 12


Fuel safety . . . . . . . . . . . . . . . . . . . . . . . 13 Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Fueling . . . . . . . . . . . . . . . . . . . . . . . . . . 14


Check before starting . . . . . . . . . . . . . . 15 Starting and stopping . . . . . . . . . . . . . . 15


General working instructions . . . . . . . . 17


Carburetor . . . . . . . . . . . . . . . . . . . . . . . 20 Muffler . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Spark plug . . . . . . . . . . . . . . . . . . . . . . . 21 Air filter . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Bevel gear . . . . . . . . . . . . . . . . . . . . . . . 22 Sharpening grass cutters and grass blades . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Maintenance schedule . . . . . . . . . . . . . 23


Technical data . . . . . . . . . . . . . . . . . . . . 24 EC--declaration of conformity

(Applies to Europe only) . . . . . . . . . . . . 25

Note the following before starting:

Please read the operator’s manual carefully.

WARNING: 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.

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.

WARNING: Long-term exposure to noise can result in permanent

hearing impairment. So always use approved hearing protection.

Jonsered has a policy of continuous product development and therefore reserves the right to modify the design and appearance of products without prior notice.

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Jonsered BC 2128 User Manual












What is what?




















Air filter cover


Grease filler cap


Handle adjustment


Bevel gear


Locking nut


Cutting attachment guard


Support flange




Support cup




Drive disc


Throttle control


Trimmer head


Stop switch


Socket spanner


Throttle lock--out


Transport guard


Harness clamp


Hex wrench


Cylinder cover


Locking pin


Starter handle




Fuel tank


Start throttle button


Choke control


Adjusting the throttle wire


Primer bulb


Operator’s manual



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IMPORTANT! The machine is only designed for trimming grass, grass clearing and/or

forestry clearing.

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

Never use the machine in extreme weather conditions such as severe cold, very hot and/

or humid climates.

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

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 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 heading Maintenance. All covers and guards must be fitted before starting. Make sure the spark plug cap and lead are not damaged. Otherwise you could

get an electric shock.

The machine operator must ensure that no people or animals come closer than 15 metres while working. When several operators are working in the same area, the safety distance should be at least 15 metres.

WARNING: This machine produces an electromagnetic field

during operation. Under some circumstances, this field may 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: Using an incorrect cutting attachment or an incorrectly

filed blade can increase the risk of accidents.

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 circum-

stances 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.


A helmet should be worn if the brush being cleared is taller than 2 metres.


Wear hearing protection that provides adequate noise reduction.


Always wear approved eye protection. If you use a visor then you must also wear approved protective goggles. Approved protective goggles must comply with EN

166 in EU countries.

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


Wear anti--slip and stable boots.


Wear clothes made of a strong fabric and

avoid loose clothing that can catch on shrubs and branches. Always wear heavy, long pants. Do not wear jewelry, shorts sandals or go barefoot. Secure hair so it is above shoulder level.


A first aid kit should be carried by operators of clearing saws, brushcutters or trimmers.

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 that has faulty safety equipment!

Follow the control, maintenance and service instructions described in this section. If your machine fails any of these checks contact your service agent to get it repaired.

Throttle lock-out

The throttle lock--out is designed to prevent accidental operation of the throttle control. When you press the lock--out (A) (i.e. when you grasp the handle) it releases the throttle control (B). When you release the

handle, the throttle control and the throttle lock--out 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 lock--out is released.

Press the throttle lock--out and make sure it

returns to its original position when you release it.

Check that the throttle control and throttle lock--out move freely and that the return springs work properly.

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

Release the throttle and check that the cutting attachment stops and remains at a standstill. If the cutting attachment rotates with the throttle in the idle position then the carburettor idle setting must be checked. See instructions under the heading Maintenance.

Stop switch

Make sure the engine stops when you push and hold the stop switch.

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

Check 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 the “Technical data” section.

WARNING: Never use a cutting attachment without an approved

guard. See the section on “Technical data”. If an incorrect or faulty guard is fitted this can cause serious personal injury.

Use of incorrectly wound trimmer line or an incorrect cutting attachment increases the level of vibration.

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 color or condition. These symptoms normally appear in the fingers, hands or wrists. The risk increases at low temperatures.

Harness quick release

There is an easily accessible, harness quick release fitted at the front in case of an emergency that requires you to free yourself from the machine and harness.

See instructions under the heading Adjusting the harness.

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


The muffler is designed to reduce the noise level and to direct the exhaust gases away from the operator.

CAUTION! Muffler is fitted with a catalytic convertic designed to reduce harmful exhaust gases.

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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.

Muffler bolts

Spark arrestor mesh

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.

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

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.

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

Locking nut

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

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.



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: S Reduce the risk of blade thrust.

S Obtain maximum cutting performance. S Extend the life of cutting equipment.


Only use cutting attachments with the guards we recommend! See the section on “Technical data”.

Refer to the instructions for the cutting attachment to check the correct way to load the trimmer line and the correct line 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


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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

lead from the spark plug before you start to work on it.

WARNING: Using an incorrect cutting attachment or an incorrect-

ly sharpened blade increases the risk of kickback.

Cutting equipment

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

A trimmer

intended for trimming



General rules

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

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.

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

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Sharpening grass cutters and grass blades

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

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

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.

Trimmer head


Always ensure the trimmer line is wound

tightly and evenly around the drum, otherwise the machine will generate harmful vibration.

SOnly use the recommended cutting attachments. See the section on “Technical data”.

SSmaller machines generally require small trimmer heads and vice versa. This is be-

cause when clearing using trimmer line the engine must throw out the trimmer line radially from the trimmer head and overcome the resistance of the grass being cleared.

SThe length of the trimmer line is also important. A longer trimmer line requires

greater engine power than a shorter trimmer line of the same diameter.

S Make sure that the cutter on the trimmer

guard is intact. This is used to cut the trimmer line to the correct length.

STo increase the life of the trimmer line it can be soaked in water for a couple of days. This will make the line tougher so that it lasts longer.


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