Stihl FS 87 Instruction Manual

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STIHL FS 87

Instruction Manual

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Original Instruction ManualPrinted on chlorine-free paper

Printing inks contain vegetable oils, paper can be recycled.

0458-274-0121-C. VA0.K11.

0000000859_010_GB

FS 87, FS 87 R

English

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Contents

Dear Customer,

Thank you for choosing a quality engineered STIHL product.

This machine has been built using modern production techniques and comprehensive quality assurance. Every effort has been made to ensure your satisfaction and troublefree use of the machine.

Please contact your dealer or our sales company if you have any queries concerning your machine.

Your

Hans Peter Stihl

Guide to Using this Manual 2 Safety Precautions and Working

Techniques 2 Approved Combinations of Cutting

Attachment, Deflector, Handle and Harness 11

Mounting the Bike Handle 12 Mounting the Loop Handle 14 Adjusting the Throttle Cable 15 Fitting the Carrying Ring 15 Mounting the Deflector 16 Mounting the Cutting Attachment 17 4-MIX Engine 20 Fuel 20 Fueling 21 Fitting the Harness 23 Balancing the Trimmer/Brushcutter 23 Starting / Stopping the Engine 25 Operating Instructions 27 Cleaning the Air Filter 27 Adjusting the Carburetor 28 Spark Arresting Screen in Muffler 30 Spark Plug 30 Lubricating the Gearbox 31 Replacing the Starter Rope and

Rewind Spring 32 Storing the Machine 34 Sharpening Metal Cutting Blades 34 Maintenance and Care 36 Minimize Wear and Avoid Damage 38 Main Parts 39 Specifications 40

Special Accessories 41 Maintenance and Repairs 42 EC Declaration of Conformity 42 Quality Certification 43

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Pictograms

The meanings of the pictograms attached to the machine are explained in this manual.

Depending on the model concerned, the following pictograms may be attached to your machine.

Symbols in text

Warning where there is a risk of an accident or personal injury or serious damage to property.

Caution where there is a risk of damaging the machine or its individual components.

Engineering improvements

STIHL's philosophy is to continually improve all of its products. For this reason we may modify the design, engineering and appearance of our products periodically.

Therefore, some changes, modifications and improvements may not be covered in this manual.

Observe all application local safety regulations, standards and ordinances.

If you have not used this type of power tool before: Have your dealer or other experienced user show you how to operate your power tool or attend a special course in its operation.

Minors should never be allowed to use a power tool.

Keep bystanders, especially children, and animals away from the work area.

When the power tool is not in use, shut it off so that it does not endanger others. Secure it against unauthorized use.

The user is responsible for avoiding injury to third parties or damage to their property.

Guide to Using this Manual

Fuel tank; fuel mixture of gasoline and engine oil

Operate decompression valve

Manual fuel pump

Operate manual fuel pump

Tube of grease

Intake air: Summer operation

Intake air: Winter operation

Handle heating

Safety Precautions and Working Techniques

Some special safety pre

cautions must be observed to reduce the risk of personal injury when operating this power tool because of the very high speed of its cut

ting attachment.

It is important you read and understand the instruction manual before first use and keep the manual in a safe place for future reference. Nonobservance of the instruction manual may result in serious or even fatal injury.

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Do not lend or rent your power tool without the instruction manual. Be sure that anyone using it understands the information contained in this manual.

The use of noise emitting power tools may be restricted to certain times by national or local regulations.

To operate the power tool you must be rested, in good physical condition and mental health.

If you have any condition that might be aggravated by strenuous work, check with your doctor before operating a power tool.

Persons with pacemakers only: The ignition system of your power tool produces an electromagnetic field of a very low intensity. This field may interfere with some pacemakers. STIHL recommends that persons with pacemakers consult their physician and the pacemaker manufacturer to reduce any health risk.

Do not operate the power tool if you are under the influence of any substance (drugs, alcohol) which might impair vision, dexterity or judgment.

Depending on the cutting attachment fitted, use your power tool only for cutting grass, wild growth, shrubs, scrub, bushes, small diameter trees and similar materials.

Do not use your power tool for any other purpose because of the increased risk of accidents.

Only use cutting attachments and accessories that are explicity approved for this power tool model by STIHL or are technically identical. If you have any questions in this respect, consult a

servicing dealer. Use only high quality parts and accessories in order to avoid the risk of accidents and damage to the machine.

STIHL recommends the use of original STIHL replacement parts. They are specifically designed to match your model and meet your performance requirements.

Never attempt to modify your unit in any way since this may increase the risk of personal injury. STIHL excludes all liability for personal injury and damage to property caused while using unauthorized attachments.

Do not use a pressure washer to clean the power tool. The solid jet of water may damage parts of the power tool.

The deflector on this power tool cannot protect the operator from all objects thrown by the cutting attachment (stones, glass, wire, etc.). Such objects may ricochet and then hit the operator.

Clothing and Equipment

Wear proper protective clothing and equipment.

Sturdy shoes with non-slip soles may be worn as an alternative only when using mowing heads.

A face shield alone does not provide adequate eye protection.

Wear hearing protection, e.g. earplugs or ear muffs.

STIHL offers a comprehensive range of personal protective clothing and equipment.

Clothing must be sturdy but allow complete free

dom of movement. Wear snug-fitting clothing, an overall and jacket combi

nation, do not wear a work coat.

Avoid clothing that could get caught on branches or brush or moving parts of the machine. Do not wear a scarf, necktie or jewelry. Tie up and con

fine long hair (e.g. with a hair net, cap, hard hat, etc.).

Wear steel-toed safety boots with non-slip soles.

Wear a safety hard hat for thinning operations, when working in high scrub and where there is a danger of head injuries from falling objects. To reduce the risk of injury from thrown objects, always wear a face shield and safety glasses.

Wear heavy-duty gloves.

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Transporting the Power Tool

Always turn off the engine.

Carry the unit hanging from the shoulder strap or properly balanced by the drive tube. Fit transport guard on metal cutting attachments to avoid the risk of injury from blade contact

Transporting in a vehicle: Properly secure your power tool to prevent turnover, fuel spillage and damage.

Fueling

Always shut off the engine before refueling.

Do not fuel a hot engine – fuel may spill and cause a fire.

Open the fuel cap carefully to allow any pressure build-up in the tank to release slowly and avoid fuel spillage.

Fuel your power tool only in wellventilated areas. If you spill fuel, wipe the machine immediately – if fuel gets on your clothing, change immediately.

Your power tool comes standard with either a screw-type or bayonet-type fuel cap.

This reduces the risk of unit vibrations causing the fuel cap to loosen or come off and spill quantities of fuel.

To reduce the risk of serious or fatal burn injuries, check for fuel leakage. If fuel leakage is found, do not start or run the engine until leak is fixed.

Before Starting

Check that your power tool is properly assembled and in good condition – refer to appropriate chapters in the instruction manual.

– Use only an approved combination

of cutting attachment, deflector, handle and harness. All parts must be assembled properly and securely.

– Slide control / stop switch must

move easily to STOP or 0

– Smooth action of throttle trigger

interlock (if fitted) and throttle trigger – the throttle trigger must return automatically to the idle position.

– Check that the spark plug boot is

secure – a loose boot may cause arcing that could ignite combustible fumes and cause a fire.

– Cutting tool or attachment: Check

for correct and secure assembly and good condition.

– Check protective devices (e.g.

deflector for cutting attachment, rider plate) for damage or wear. Always replace damaged parts. Do not operate your machine with a damaged deflector or worn rider plate (lettering and arrows no longer legible).

– Never attempt to modify the controls

or safety devices in any way.

Gasoline is an extremely flammable fuel. Keep clear of naked flames. Do not spill any fuel – do not smoke.

002BA079 KN

After fueling, tighten down the screw-type fuel cap as securely as possible.

Insert the fuel cap with hinged grip (bayonet-type cap) correctly in the opening, turn it clockwise as far as stop and fold the grip down.

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– Keep the handles dry and clean –

free from oil and dirt – for safe control of the power tool.

– Adjust the harness and handle(s) to

suit your height and reach. See chapters on "Fitting the Harness" and "Balancing the Trimmer/Brushcutter".

To reduce the risk of personal injury, do not operate your power tool if it is damaged or not properly assembled.

If you use a shoulder strap or full harness: Practice removing and putting down the machine as you would in an emergency. To avoid damage, do not throw the machine to the ground when practicing.

Starting the engine

Start the engine at least 3 meters from the fueling spot, outdoors only.

Place the unit on firm ground in an open area. Make sure you have good balance and secure footing. Hold the unit securely. The cutting attachment must be clear of the ground and all other obstructions because it may begin to run when the engine starts.

Your power tool is a one-person unit. To reduce the risk of injury from thrown objects, do not allow other persons within a radius of 15 meters of your own position – even when starting.

Check idle speed setting: The cutting attachment must not rotate when the engine is idling with the throttle trigger released.

To reduce the risk of fire, keep hot exhaust gases and hot muffler away from easily combustible materials (e.g. wood chips, bark, dry grass, fuel).

Holding and Controlling the Power Tool

Always hold the power tool firmly with both hands on the handles.

Make sure you always have good balance and secure footing.

Models with bike handle

Right handle on control handle, left hand on left handle.

Models with loop handle

On models with a loop handle and barrier bar, left hand on loop handle, right hand on control handle, even if you are left-handed.

During Operation

Make sure you always have good balance and secure footing.

In the event of impending danger or in an emergency, switch off the engine immediately by moving the slide control / stop switch to STOP or 0.

To reduce the risk of injury, do not allow any other persons within a radius of 5 meters of your own position. To reduce the risk of damage to property, also maintain this distance from other objects (vehicles, windows).

The correct engine idle speed is important to ensure that the cutting attachment stops rotating when you let go of the throttle trigger.

To reduce the risk of injury, avoid contact with the cutting attachment.

Do not drop start the power tool – start the engine as described in the instruction manual. Note that the cutting attachment continues to run for a short period after you let go of the throttle trigger – flywheel effect.

002BA055 KN

002BA080 KN

15m (50ft)

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Check and correct the idle speed setting at regular intervals. If the cutting attachment still rotates at idle speed, have your dealer make proper adjustments or repairs. STIHL recommends a STIHL servicing dealer.

Take special care in slippery conditions – damp, snow, ice, on slopes or uneven ground.

Watch out for obstacles: Roots, tree stumps or holes which could cause you to trip or stumble.

Always stand on the ground while working, never on a ladder, work platform or any other insecure support.

Be particularly alert and cautious when wearing hearing protection because your ability to hear warnings (shouts, alarms, etc.) is restricted.

To reduce the risk of accidents, take a break in good time to avoid tiredness or exhaustion.

Work calmly and carefully – in daylight conditions and only when visibility is good. Stay alert so as not to endanger others.

To reduce the risk of serious or fatal injury from breathing toxic fumes, ensure proper ventilation when working in trenches, hollows or other confined locations.

To reduce the risk of accidents, stop work immediately in the event of nausea, headache, visual disturbances (e.g. reduced field of vision), problems with hearing, dizziness, deterioration in ability to concentrate. Apart from other possibilities, these symptoms may be caused by an excessively high concentration of exhaust gases in the work area.

Operate your power tool so that it produces a minimum of noise and emissions – do not run the engine unnecessarily, accelerate the engine only when working.

To reduce the risk of fire, do not smoke while operating or standing near your power tool. Note that combustible fuel vapor may escape from the fuel system.

The dusts, vapor and smoke produced during operation may be dangerous to health. If the work area is very dusty or smoky, wear a respirator.

If your power tool is subjected to unusually high loads for which it was not designed (e.g. heavy impact or a fall), always check that it is in good condition before continuing work – see also "Before Starting".

Check the fuel system in particular for leaks and make sure the safety devices are working properly. Do not continue operating your power tool if it is damaged. In case of doubt, have the unit checked by your servicing dealer.

Do not operate your power tool in the starting throttle position – engine speed cannot be controlled in this position.

Special care must be taken when working in difficult, over-grown terrain.

When cutting high scrub, under bushes and hedges: Keep cutting attachment at minimum height of 15 cm to avoid harming small animals.

Always shut off the engine before leaving the unit unattended.

Check the cutting attachment at regular short intervals during operation or immediately if there is a noticeable change in cutting behavior:

– Turn off the engine. Hold the unit

firmly and wait for the cutting attachment to come to a standstill.

– Check condition and tightness, look

for cracks.

Your power tool produces toxic exhaust fumes as soon as the engine is running. These fumes may be colorless and odorless and contain unburned hydrocarbons and benzol. Never run the engine indoors or in poorly ventilated loca

tions, even if your model is equipped with a cata

lytic converter.

To reduce the risk of injuryfrom thrown objects, never operate the unit without the proper deflector for the type of cutting attachment being used.

Inspect the work area: Stones, pieces of metal or other solid objects can be thrown and cause per

sonal injury or damage the cutting attachment and property (e.g. parked vehicles, windows).

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– Check sharpness.

– Replace damaged or dull cutting

attachments immediately, even if they have only superficial cracks.

Clean grass and plant residue off the cutting attachment mounting at regular intervals – remove any build up of material from the cutting attachment and deflector.

To reduce the risk of injury, shut off the engine before replacing the cutting attachment.

Do not continue using or attempt to repair damaged or cracked cutting attachments by welding, straightening or modifying the shape (out of balance).

This may cause parts of the cutting attachment to come off and hit the operator or bystanders at high speed and result in serious or fatal injuries.

When using mowing heads

Equip the deflector with the additional components specified in the instruction manual.

Use only the deflector with properly mounted line limiting blade to ensure the mowing lines are automatically trimmed to the approved length.

To reduce the risk of injury, always turn off the engine before adjusting the nylon line of manually adjustable mowing heads

Using the unit with over-long nylon cutting lines reduces the motor's operating speed. The clutch then slips continuously and this causes overheating and damage to important components (e.g. clutch, polymer

housing components) – and this can increase the risk of injury from the cutting attachment rotating while the engine is idling.

When using metal cutting attachments

STIHL recommends the use of original STIHL metal cutting attachments. They are specifically designed to match your model and meet your performance requirements.

Metal cutting attachments rotate at very high speed. The forces that occur act on the machine, the attachment and the material being cut.

Sharpen metal cutting attachments regularly as specified.

Unevenly sharpened metal cutting attachments cause out-of-balance which can impose extremely high loads on the machine and increase the risk of breakage.

Dull or improperly sharpened cutting edges can put a higher load on the cutting attachment and increase the risk of injuryfrom cracked or broken parts.

Inspect metal cutting attachments for cracks or warping after every contact with hard objects (e.g. stones, rocks, pieces of metal). To reduce the risk of injury, remove burrs and other visible build-ups of material (use a file) because they may become detached and be thrown at high speed during operation.

To reduce the above-mentioned risks when using a metal cutting attachment, never use a metal cutting attachment with a diameter larger than specified. It must not be too heavy. It must be

manufactured from materials of adequate quality and its geometry must be correct (shape, thickness).

To reduce the risk of injury, a metal cutting attachment not manufactured by STIHL must not be heavier, thicker, have a different shape or a diameter larger than the largest metal cutting attachment approved by STIHL for this power tool model.

Vibrations

Prolonged use of the power tool may result in vibration-induced circulation problems in the hands (whitefinger disease).

No general recommendation can be given for the length of usage because it depends on several factors.

The period of usage is prolonged by:

– Hand protection (wearing warm

gloves)

– Work breaks

The period of usage is shortened by:

– Any personal tendency to suffer

from poor circulation (symptoms: frequently cold fingers, tingling sensations).

– Low outside temperatures.

– The force with which the handles

are held (a tight grip restricts circulation).

Continual and regular users should monitor closely the condition of their hands and fingers. If any of the above symptoms appear (e.g. tingling sensation in fingers), seek medical advice.

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Maintenance and Repairs

Service the machine regularly. Do not attempt any maintenance or repair work not described in the instruction manual. Have all other work performed by a servicing dealer.

STIHL recommends that you have servicing and repair work carried out exclusively by an authorized STIHL servicing dealer. STIHL dealers are regularly given the opportunity to attend training courses and are supplied with the necessary technical information.

Only use high-quality replacement parts in order to avoid the risk of accidents and damage to the machine. If you have any questions in this respect, consult a servicing dealer.

STIHL recommends the use of genuine STIHL replacement parts. They are specifically designed to match your model and meet your performance requirements.

To reduce the risk of injury, always shut off the engine before carrying out any maintenance or repairs or cleaning the machine. – Exception: Carburetor and idle speed adjustments.

Do not turn the engine over on the starter with the spark plug boot or spark plug removed unless the slide control / stop switch is on STOP or 0 since there is otherwise a risk of fire from uncontained sparking.

To reduce the risk of fire, do not service or store your machine near open flames.

Check the fuel filler cap for leaks at regular intervals.

Use only a spark plug of the type approved by STIHL and make sure it is in good condition – see "Specifications".

Inspect the ignition lead (insulation in good condition, secure connection).

Check the condition of the muffler.

To reduce the risk of fire and damage to hearing, do not operate your machine if the muffler is damaged or missing.

Do not touch a hot muffler since burn injury will result.

Vibration behavior is influenced by the condition of the AV elements – check the AV elements at regular intervals.

Symbols on Deflectors

An arrow on the deflector shows the correct direction of rotation of the cutting attachments.

Harness / Strap

The harness is included in the scope of supply or available as a special accessory.

N Use a shoulder strap. N With the engine running, attach the

machine to the shoulder strap.

Grass cutting blades and brush knives must always be used in combination with a shoulder strap.

Circular saw blades must always be used in combination with a full harness with a quick-release system.

Use deflector in combination with mowing heads only. Do not use metal cutting attachments.

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Mowing Head with Nylon Lines

Nylon line achieves a soft cut for edging and trimming around trees, fence posts, etc. – less risk of damaging tree bark.

To reduce the risk of injury, never use steel wire in place of the nylon cutting line.

STIHL Polycut Mowing Head with Polymer Blades

For mowing unobstructed edges of meadows (without posts, fences, trees or similar obstacles).

Check the wear limit marks!

If one of the wear limit marks on the PolyCut mowing head is worn through (arrow): Do not continue using the mowing head. Install a new one. There is otherwise a risk of injury from thrown parts of the head.

It is important to follow the maintenance instructions for the Polycut mowing head.

Risk of Kickout (Blade Thrust) with Metal Cutting Attachments

When using metal cutting attachments (grass cutting blade, brush knife, circular saw blade) there is a risk of kickout when the rotating blade comes into contact with a solid object such as a tree trunk, branch, tree stump, rock or similar. The machine is thrown to the right or to the rear – opposite to the attachment's direction of rotation.

The risk of kickout is greatest when the black area of the rotating cutting attachment comes into contact with a solid object.

Grass Cutting Blade

Use for grass and weeds only – sweep the brushcutter in an arc like a scythe.

Improper use may damage the grass cutting blade – risk of injury from thrown parts.

000BA015 KN

002BA177 KN

002BA135 KN

000BA020 KN

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Resharpen the grass cutting blade according to instructions when it has dulled noticeably.

Brush Knife

Suitable for cutting matted grass, wild growth and scrub, thinning young stands with a maximum stem diameter of 2 cm. To reduce the risk of personal injury, never attempt to cut thicker wood.

To cut wild growth and scrub, lower the brush knife down onto the growth to achieve shredding effect – do not use the cutting attachment above waist height.

Exercise extreme caution when using this method of cutting. The higher the cutting attachment is off the ground, the greater the risk of injury from cuttings being thrown sideways.

Use the brushcutter like a scythe (sweep it to the right and left) at ground level when cutting grass and thinning young stands.

Warning! Improper use of a brush knife may cause it to crack, chip or shatter – risk of injury from thrown parts.

To reduce the risk of injury it is essential to take the following precautions

– Avoid contact with stones, rocks,

pieces of metal and other solid foreign objects.

– Never cut wood or shrubs with a

stem diameter of more than 2 cm – use a circular saw blade for this purpose.

– Inspect the brush knife at regular

short intervals for signs of damage. Do not continue working with a damaged brush knife.

– Resharpen the brush knife regularly

(when it has dulled noticeably) and have it balanced if necessary (STIHL recommends a STIHL servicing dealer).

Circular Saw Blade

For cutting shrubs and trees:

Up to a stem diameter of 4 cm when used on brushcutters.

Up to a stem diameter of 7 cm when used on clearing saws.

Before starting the cut, accelerate the engine up to full throttle. Perform cut with uniform pressure.

Use circular saw blades only with a matching limit stop of the correct diameter.

To reduce the risk of blade damage, avoid contact with stones and the ground. Resharpen the blade properly in

good time – dull teeth may result in the blade cracking and shattering and causing serious injury.

When felling, maintain a distance of at least two tree lengths from the next felling site.

Risk of kickout

The risk of kickout is highest in the black area of the blade: Do not use this area of the circular saw blade for cutting.

There is also a risk of kickout when using the lighter shaded areas of the blade: These areas of the blade should only be used by experienced operators with specialized training.

STIHL recommends that you use the non-shaded area of the circular saw blade. Always start the cut with this area of the blade.

002BA066 KN

002BA068 KN

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Approved Combinations of Cutting Attachment, Deflector, Handle and Harness

Cutting Attachment Deflector Handle Shoulder strap

681BA118 KN

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Approved Combinations

Select correct combination from the table according to the cutting attachment you intend to use.

For safety reasons only the cutting attachments, deflectors, handles and harnesses/shoulder straps shown in each row of the table may be used together. No other combinations are permitted because of the risk of accidents.

Cutting Attachments

Mowing heads

1 STIHL SuperCut 20-2 2 STIHL AutoCut C 25--2 3 STIHL AutoCut 25-2 4 STIHL TrimCut 31-2 5 STIHL FixCut 25-2 6 STIHL PolyCut 20-3

Metal cutting attachments

7 Grass cutting blade 230-2 8 Grass cutting blade 230-4 9 Grass cutting blade 230-8 10 Grass cutting blade 250-40 Spezial 11 Brush knife 250-3 12 Scratcher tooth circular saw blade

200

13 Chisel tooth circular saw blade 200

Non-metal grass cutting blades, brush knives and circular saw blades are not approved.

Deflectors

14 Deflector only for mowing heads 15 Deflector with 16 Skirt and blade for all mowing heads

only (see "Mounting the deflector")

17 Deflector without skirt and blade for

all metal mowing attachments and brush knife

18 Limit stop for circular saw blades

Handles

19 Loop handle 20 Loop handlewith 21 Barrier bar 22 Bike handle

Harnesses

23 Shoulder strap may be used 24 Shoulder strap must be used 25 Full harness may be used 26 Full harness must be used

Mounting the handlebar

N Mount the handlebar (1) on the

drive tube (2) about 40 cm (15 in) (A) forward of the engine housing.

N Place the clamp (3) and handle

support (4) against the drive tube (2).

Mounting the Bike Handle

002BA236 KN

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Securing the handlebar

N Place the handlebar (1) in the

handle support so that distance A is no more than 15 cm (6 in) – the rubber handle (5) must be on the left (viewed from engine).

N Place the clamp (6) on the handle

support.

N Insert the screws (7) through the

holes in the parts and screw them into the clamp (3) as far as stop.

N Line up the handlebar. N Tighten down the screws firmly.

Mounting the control handle

N Take out the screw (8) – the nut (9)

remains in the control handle (10).

N Push the control handle onto the

end of the handlebar (1) until the holes (12) line up – the throttle trigger (11) must point towards the gearbox.

N Insert the screw (8) and tighten it

down firmly.

Fitting the throttle cable

Do not kink the throttle cable or lay it in tight radii – make sure the throttle trigger moves freely.

N Push the throttle cable (13) into the

retainer (14).

Throttle cable adjustment

Some machine versions are equipped with a throttle cable adjuster.

N Check adjustment of throttle cable –

see chapter on "Adjusting the Throttle Cable".

002BA237 KN

002BA238 KN

002BA239 KN

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Loop handle with barrier bar

N Fit the square nuts (1) in the barrier

bar (2); the holes must line up.

N Fit the clamp (3) in the loop

handle (4) and place them both on the drive tube (5).

N Place the clamp (6) in position. N Place the barrier bar (2) in position

as shown.

N Line up the holes. N Insert the screws (7) and tighten

them down moderately against the barrier bar.

N Go to "Securing the loop handle".

Loop handle without barrier bar

N Fit the clamp (3) in the loop

handle (4) and place them both on the drive tube (5).

N Place the clamp (6) in position. N Line up the holes. N Fit washers (7) on the screws (8)

and insert the screws in the holes. Fit the square nuts (1) and screw them down as far as stop.

N Go to "Securing the loop handle".

Mounting the Loop Handle

002BA098 KN

002BA099 KN

002BA136 KN

6 1

8 7

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Securing the loop handle

N Secure the loop handle (4) about

20cm/8in (A) forward of the control handle (9).

N Line up the loop handle. N Tighten down the screws firmly –

lock the nuts if necessary.

The sleeve (10) (not fitted on all models) must be between the loop handle and the control handle.

Some machine versions are equipped with a throttle cable adjuster on the control handle.

A properly adjusted throttle cable is the precondition for correct operation in the full throttle, starting throttle and idle positions.

Adjust the throttle cable only after the unit is fully assembled – the control handle must be in the normal operating position.

N Use a suitable tool to push the slide

to the end of the slot (see illustration).

N Press down the throttle trigger

lockout (1) and squeeze the throttle trigger (2) (full throttle) – this sets the throttle cable correctly.

The carrying ring comes standard with the machine or is available as a special accessory.

For position of carrying ring see "Main Parts".

N Place the clamp (1) against the

drive tube with the tapped hole on the left (viewed from engine).

N Squeeze the two ends of the clamp

together and hold in that position.

N Insert the M6x14 screw (2). N Line up the carrying ring. N Tighten down the screw firmly.

002BA147 KN

Adjusting the Throttle Cable

002BA163 KN

STOP

249BA017 KN

Fitting the Carrying Ring

002BA142 KN

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Mounting the Deflector

1 Deflector for mowing attachments 2 Deflector for mowing heads

Deflectors (1) and (2) are both mounted to the gearbox in the same way.

N Place the deflector on the gearbox

flange.

N Insert the screws (3) and tighten

them down firmly.

Fitting the Skirt and Blade

These parts must be fitted to the deflector (1) when you use a mowing head.

N Slide the lower guide slot of the skirt

(4) onto the deflector (1) – it must snap into position.

N Push the blade (5) into the upper

guide slot on the skirt and line it up with the first hole.

N Insert the screw and tighten it down

firmly.

Mounting the Limit Stop

Always fit the limit stop (6) when you use a circular saw blade.

N Position the limit stop (6) on the

gearbox flange.

N Insert the screws (7) and tighten

them down firmly.

Mounting the Deflector

002BA380 KN

002BA103 KN

002BA382 KN

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Preparations

N Lay your brushcutter on its back so

that the cutting attachment mounting face is facing up.

Mounting hardware for cutting attachments

The mounting hardware supplied depends on the cutting attachment that comes as original equipment with the new machine.

Mounting hardware is not packed with machine

Only mowing heads can be mounted.

N Pull the hose (1) (protector for

shipping) off the shaft (2).

N Go to "Mounting the mowing head".

If you want to mount a metal cutting attachment in place of a mowing head, you will need the following additional parts: Nut (3), rider plate (4) and thrust washer (5) (special accessories).

Mounting hardware is packed with machine

Mowing heads and metal cutting attachments may be mounted.

If the parts are packed with the machine N Pull the hose (1) (protector for

shipping) off the shaft (2).

The nut (3), rider plate (4) and thrust wsher (5) are in the parts kit supplied with the machine.

N Go to "Mounting the mowing head"

or "Mounting the metal cutting attachment".

If the parts are mounted to the gearbox N Go to "Removing the mounting

hardware".

Removing the mounting hardware

N Block the shaft – see next chapter

on "Blocking the output shaft".

N Use the combination wrench (6) –

comes standard with machine or is available as special accessory – to unscrew the nut (3) clockwise (lefthand thread) from the shaft (2).

N Pull the thrust washer (5) off the

shaft (2).

The rider plate (4) is in the parts kit supplied with the machine.

Mounting the Cutting Attachment

002BA104 KN

002BA164 KN

Page 20

FS 87, FS 87 R

English

N Go to "Mounting the mowing head"

or "Mounting the metal cutting attachment".

Blocking the output shaft

N Insert the stop pin (7) or screwdriver

– come standard with machine or are available as special accessories – in the hole (8) in the gearbox as far as stop, and apply slight pressure.

N Rotate the nut or cutting attachment

on the shaft (2) until the stop pin slips into position and blocks the shaft.

Mounting the Mowing Head

Keep the instruction sheet for the mowing head in a safe place.

STIHL SuperCut 20-2, STIHL AutoCut 25-2, STIHL AutoCut C 25-2, STIHL TrimCut 31-2, STIHL FixCut 252, STIHL PolyCut 20-3

N Screw the mowing head

counterclockwise on to the shaft (1) as far as stop.

N Block the shaft. N Tighten down the mowing head.

Remove the tool used to block the shaft.

Removing the Mowing Head

N Block the shaft.

STIHL SuperCut 20-2, STIHL AutoCut 25-2, STIHL AutoCut C 25-2, STIHL TrimCut 31-2, STIHL FixCut 252, STIHL PolyCut 20-3

N Unscrew the mowing head

clockwise.

Adjusting Nylon Line

STIHL SuperCut

Fresh line is advanced automatically if remaining line is still at least 6cm long. The blade on the deflector trims surplus line to the correct length.

STIHL AutoCut N Hold the rotating mowing head

above the ground – tap it on the ground once – about 3cm fresh line is advanced.

The blade on the deflector trims surplus line to the correct length – avoid tapping the mowing head more than once at a time.

Line feed operates only if both lines still have a minimum length of 2.5 cm.

All other mowing heads

Refer to the instructions supplied with the mowing head.

To reduce the risk of injury, always shut off the engine before adjusting the mowing line by hand.

002BA166 KN

002BA081 KN

Page 21

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Replacing Nylon Line or Cutting Blades

Refer to the instructions supplied with the mowing head.

Mounting Metal Cutting Attachments

The skirt and line limiting blade are not required on the mowing attachment deflector for grass cutting blades 230-2(2), 230-4(4), 230-8(1), 250-40 Spezial (3) or the brush knife (5) – see "Mounting the Deflector".

Fit the approriate limit stop for circular saw blades 200 (6, 7) – see "Mounting the deflector".

Lay your brushcutter on its back with the cutting attachment mounting face pointing up: The cutt ing edges of (2), (4)

and (5) may point in either direction. The cutting edges of (1), (3), (6) and (7) must point clockwise.

Direction of rotation is indicated by an arrow on the inside of the mowing attachment deflector or limit stop.

N Place the cutting attachment (8) on

the thrust plate (9).

Collar (see arrow) must engage the cutting attachment's mounting hole.

N Fit the thrust washer (10) and rider

plate (11) on the shaft (12).

N Block the drive shaft. N Use the combination wrench (14) to

screw the mounting nut (13) on to the output shaft counterclockwise and tighten it down firmly.

Remove the tool used to block the shaft.

Removing the metal cutting attachment

N Block the drive shaft. N Unscrew the mounting nut

clockwise.

N Take the parts off the shaft – do not

remove the thrust plate (9).

If the mounting nut turns too freely, fit a new one.

681BA042 KN

681BA161 KN

Page 22

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The STIHL 4-MIX engine features mixture lubrication and must be run on a fuel mixture of gasoline and engine oil.

It operates otherwise on the 4-stroke principle.

The engine requires a mixture of gasoline and engine oil.

Avoid direct skin contact with and breathing in of gasoline fumes.

STIHL MotoMix

STIHL recommends using STIHL MotoMix. This pre-blended fuel is free of benzene and lead, stands out because of a high octane rating, and always provides the proper mixing ratio.

STIHL MotoMix is blended with STIHL HP Ultra two-stroke engine oil for maximum engine life.

MotoMix is not available in all markets.

Mixing fuel

Unsuitable fuels or a mixing ratio that deviates from the specification can lead to severe engine damage. The engine, seals, fuel lines and fuel tank may be damaged if poor quality gasoline or engine oil is used.

Gasoline

Use only high-quality gasoline with an octane rating of at least 90 ROC – leaded or unleaded.

Unleaded gasoline must be used in machines equipped with a catalytic converter.

Using multiple tankfuls of leaded gasoline can substantially reduce the effectiveness of the catalytic converter.

Gasoline with an alcohol component exceeding 10% can cause impaired engine performance in engines with manually adjustable carburetors and thus should not be used in these engines.

Engines with M-Tronic deliver full engine performance using gasoline with an alcohol component of up to 25% (E25).

Engine oil

Use only high-quality two-stroke engine oil – ideally STIHL HP, HP Super or HP Ultra two-stroke engine oil, as they are specially engineered for STIHL engines. HP Ultra ensures maximum performance and engine life.

The engine oils are not available in all markets.

Only STIHL two-cycle engine oil 1:50 may be used to produce the fuel mixture for machines with a catalytic converter.

Mixing ratio

for STIHL two-cycle engine oil 1:50; 1:50 = 1 part oil + 50 parts gasoline

4-MIX Engine Fuel

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FS 87, FS 87 R

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Examples

N Pour oil into an approved safety fuel

canister first, then add gasoline and mix thoroughly

Storing fuel mixture

Store in approved safety fuel canisters only in a dry, cool and secure place protected against light and sunlight.

Fuel mixture ages – mix only as much as needed for a few weeks. Do not store fuel mixture for longer than three months. The fuel mixture can become unusable faster if exposed to light, sunlight or low or high temperatures.

N Shake the canister containing the

fuel mixture thoroughly before refueling

Pressure can build up inside the canister – open carefully.

N The fuel tank and the canister in

which fuel mixture is stored should be cleaned thoroughly from time to time

Residual fuel and the liquid used for cleaning must be disposed of in accordance with regulations and without harming the environment!

Preparations

N Before fueling, clean the filler cap

and the area around it so that dirt cannot fall into the tank.

N Always position the machine so that

the filler cap is facing upwards.

A number of different filler caps are installed as standard at the factory.

Cliplock filler cap (bayonet-type)

Quantity of gasoline

STIHL two-cycle engine oil 1:50

Liters Liters (ml)

10.02(20) 5 0.10 (100) 10 0.20 (200) 15 0.30 (300) 20 0.40 (400) 25 0.50 (500)

Fueling

002BA420 KN

002BA418 KN

Page 24

FS 87, FS 87 R

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Threaded filler cap

Opening the cliplock filler cap

N Swing the clip into an upright

position

N Turn the cap counterclockwise

(approx. 1/4 turn)

N Remove the filler cap

Refueling

Take care not to spill fuel while fueling and do not overfill the tank. STIHL recommends use of the STIHL filling system (special accessory).

Closing the cliplock filler cap

N Position the cap with the clip in an

upright position; the markings must line up

N Turn cap clockwise as far as it will

go (approx. 1/4 turn)

N Fold the cliplock down so that it is

flush with the surface

If the cliplock is not flush with the surface and the lug on the clip does not engage entirely in the recess (arrow), the cap is not properly closed and the steps described above must be repeated.

Opening screw-type tank cap

N Turn the cap counterclockwise until

it can be removed from the tank opening.

N Remove the cap.

Filling up with fuel

Take care not to spill fuel while fueling and do not overfill the tank. STIHL recommends you use the STIHL filler nozzle (special accessory).

Closing screw-type tank cap

N Place the cap in the opening. N Turn the cap clockwise as far as

stop and tighten it down as firmly as possible by hand.

002BA419 KN

249BA053 KN

249BA054 KN

249BA055 KN

249BA056 KN

002BA447 KN

002BA448 KN

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The type and style of the harness depend on the market.

The use of the shoulder strap is described in the chapter on "Approved Combinations of Cutting Attachment, Deflector, Handle and Harness".

Shoulder strap

N Put on the shoulder strap (1). N Adjust the length of the strap so that

the carabiner (2) is about a hand’s width below your right hip.

N Balance the brushcutter.

Full harness

N Put on the full harness (1). N Ad j ust the le ngth of th e strap so t h at

the spring hook (2) is about a hand’s width below your right hip.

N Balance the trimmer/brushcutter.

Attaching the unit to the harness

The type and style of the harness and carabiner (spring hook) depend on the market.

N Attach the carabiner (1) to the

carrying ring (2) on the drive tube.

Fitting the Harness

002BA374 KN

Balancing the Trimmer/Brushcutter

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N Loosen the screw (3).

Balancing the brushcutter

The unit is balanced differently, depending on the cutting attachment used.

Proceed as follows until the conditions specified under "Floating positions" have been met:

N Adjust the carrying ring. N Tighten the screw moderately. N Allow the unit to hang freely. N Check the position obtained.

Floating positions

Mowing tools (A) such as mowing heads, grass cutting blades and brush knives

N should just touch the ground.

Circular saw blades (B) N should "hover" about 20 cm (8 in)

above the ground.

When the correct floating position has been reached:

N Tighten down the screw on the

carrying ring firmly.

Detaching the unit from the harness

N Press down the bar on the

carabiner (1) and pull the carrying ring (2) out of the carabiner.

002BA034 KN

002BA035 KN

Page 27

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Controls

Control handle on handlebar

1 Throttle trigger lockout 2 Throttle trigger 3 Slide control

Control handle on drive tube

1 Throttle trigger lockout 2 Throttle trigger 3 Slide control

Positions of slide control

4STOP-0 – engine off – the ignition is

switched off

5 F – normal run position – the engine

is running or can start

6START – the ignition is switched on

– the engine can start

Symbol on slide control 7 h – stop symbol and arrow. To stop

the engine, push the slide control in the direction of the arrow on the stop symbol (h) to STOP-0.

Starting

N Press down the trigger lockout lever

and squeeze the throttle trigger.

N and hold them in that position. N Move the slide control to START

and hold it there.

N Now release the throttle trigger,

slide control and trigger lockout in that order. This is the starting throttle position.

N Set the choke knob (8):

N Press the fuel pump bulb (9) at least

five times – even if the bulb is filled with fuel.

Starting / Stopping the Engine

STOP

002BA182 KN

START

STOP-

STOP

5 6

002BA181 KN

START

STOP-

g if the engine is cold e for warm start – also use this posi

tion if the engine has been running but is still cold.

249BA057 KN

Page 28

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Starting

N Place the unit on the ground: It must

rest securely on the engine support and the deflector. Check that the cutting attachment is not touching the ground or any other obstacles.

N Make sure you have a safe and

secure footing.

N Hold the unit with your left hand and

press it down firmly – your thumb should be under the fan housing.

Do not stand or kneel on the drive tube.

N Hold the starter grip with your right

hand.

N Pull the starter grip slowly until you

feel it engage and then give it a brisk strong pull.

Do not pull out the starter rope all the way – it might otherwise break.

N Do not let the starter grip snap back.

Guide it slowly back into the housing so that the starter rope can rewind properly.

N Crank the engine until it begins to

fire. After no more than five attempts, turn the choke knob to e.

N Continue cranking.

As soon as the engine runs N Blip the throttle trigger. The slide

control moves to the normal run position F – and the engine settles down to idle speed.

Make sure the carburetor is correctly adjusted. The cutting attachment must not rotate when the engine is idling.

Your machine is now ready for operation.

Shut off the engine.

N Push the slide control in the

direction of the arrow on the stop symbol (h) to STOP-0.

At very low outside temperatures:

As soon as the engine runs: N Blip the throttle trigger to disengage

the starting throttle position. The slide control moves to the normal run position (F) – and the engine settles down to idle speed.

N Open the throttle slightly. N Warm up the engine for a short

period.

If the engine does not start

Choke knob If you did not turn the choke knob to e

quickly enough after the engine began to fire, the combustion chamber is flooded.

N Turn the choke knob to e. N Set the slide control, lockout lever

and throttle trigger to the starting throttle position.

N Start the engine by pulling the

starter rope briskly – 10 to 20 pulls may be necessary.

If the engine still does not start

N Move the slide control to STOP-0. N Remove the spark plug – see

"Spark Plug".

N Dry the spark plug.

Page 29

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N Crank the engine several times with

the starter to clear the combustion chamber.

N Refit the spark plug – see "Spark

Plug".

N Move the slide control to START. N Set the choke knob to e – even if

the engine is cold.

N Now start the engine.

Throttle cable adjustment N Check adjustment of throttle cable –

see chapter on "Adjusting the Throttle Cable".

Fuel tank run until completely dry N After refueling, press the fuel pump

bulb at least five times – even if the bulb is filled with fuel.

N Set the choke knob according to

engine temperature.

N Start the engine.

During break-in period

A factory-new machine should not be run at high revs (full throttle off load) for the first three tank fillings. This avoids unnecessary high loads during the break-in period. As all moving parts have to bed in during the break-in period, the frictional resistances in the engine are greater during this period. The engine develops its maximum power after about 5 to 15 tank fillings.

During Operation

After a long period of full throttle operation, allow the engine to run for a short while at idle speed so that engine heat can be dissipated by the flow of cooling air. This protects enginemounted components (ignition, carburetor) from thermal overload.

After Finishing Work

Storing for a short period: Wait for the engine to cool down. Empty the fuel tank and keep the machine in a dry place, well away from sources of ignition, until you need it again. For longer out-ofservice periods – see "Storing the Machine".

If there is a noticeable loss of engine power

N Turn the choke knob to g N Take out the screw (1) and remove

the filter cover (2).

N Clean away loose dirt from around

the filter.

N Grip the filter element (3) at the

cutout (arrow) in the filter housing (4) and remove it.

N Fit a new filter element. As a

temporary measure you can knock it out on the palm of your hand or blow it out with compressed air. Do not wash.

N Replace damaged parts.

Installing the filter

N Install the filter element in the filter

housing and fit the cover.

N Insert the screw and tighten it down

firmly.

Operating Instructions Cleaning the Air Filter

273BA006 KN

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The carburetor comes from the factory with a standard setting.

This setting provides an optimum fuel-air mixture under most operating conditions.

These power tools are equipped with different carburetors:

Version A

– High speed screw and low speed

screw with special head – without slotted head.

On these machine versions it is no longer necessary to adjust the carburetor.

These machines have been set at the factory to provide an optimum fuel-air mixture in all locations and operating conditions.

Adjusting Idle Speed

Engine stops while idling

N Warm up the engine for about 3

minutes.

N Turn the idle speed screw (LA)

slowly clockwise until the engine runs smoothly – the cutting attachment must not move.

Cutting attachment runs when engine is idling

N Turn the idle speed screw (LA)

counterclockwise until the cutting attachment stops running and then turn the screw about another 1/2 to 3/4 turn in the same direction.

If the working tool or cutting attachment continues to run when the engine is idling, have your machine checked and repaired by your servicing dealer.

Version B

– High speed screw and low speed

screw with slotted head.

With this carburetor it is only possible to adjust the high speed and low speed screws within fine limits.

Standard Setting

N Shut off the engine N Mount the cutting attachment N Check the air filter and clean or

replace as necessary.

N Check that the throttle cable is

properly adjusted – readjust if necessary – see chapter on "Adjusting the Throttle Cable".

N Check the spark arresting screen

(not in all versions) and clean or replace as necessary.

Adjusting the Carburetor

249BA066 KN

H L

249BA066 KN

H L

249BA067 KN

H L

Page 31

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N Carefully turn both adjusting screws

counterclockwise as far as stop:

– The high speed screw (H) is 3/4 turn

open.

– The low speed screw (L) is 3/4 turn

open.

N Start and warm up the engine. N Adjust idle speed with the idle speed

screw (LA) so that the cutting attachment does not move.

Adjusting Idle Speed

It is usually necessary to change the setting of the idle speed screw (LA) after every correction to the low speed screw (L).

N Warm up the engine for about 3

minutes.

Engine stops while idling N Turn the idle speed screw (LA)

slowly clockwise until the engine runs smoothly – the cutting attachment must not move.

Cutting attachment runs when engine is idling

N Turn the idle speed screw (LA)

counterclockwise until the cutting attachment stops running and then turn the screw about another 1/2 to 3/4 turn in the same direction.

If the working tool or cutting attachment continues to run when the engine is idling, have your machine checked and repaired by your servicing dealer.

Erratic idling behavior, engine stops even though setting of LA-screw has been corrected, poor acceleration

Idle setting is too lean: N Turn the low speed screw (L)

counterclockwise, no further than stop, until the engine runs and accelerates smoothly.

Erratic idling behavior

Idle setting is too rich N Turn the low speed screw (L)

clockwise, no further than stop, until the engine runs and accelerates smoothly.

Version B: Fine Tuning

A slight correction of the setting of the high speed screw (H) may be necessary if engine power is not satisfactory when operating at high altitude, sea level or after changing the working tool/cutting attachment.

Rule of thumb:

Turn the high speed screw (H) about one quarter turn for every 1000m (3300 ft) change in altitude.

Conditions for adjustment N Carry out the standard setting

without disturbing the high speed screw (H).

N Warm up the engine for about 3

minutes.

N Open the throttle wide.

At high altitude N Turn the high speed screw (H)

clockwise (leaner), no further than stop, until there is no further noticeable increase in engine speed.

At sea level N Turn the high speed screw (H)

counterclockwise (richer), no further than stop, until there is no noticeable increase in engine speed.

It is possible that maximum engine speed may be reached with the standard setting.

249BA067 KN

H L

Page 32

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In some countries the muffler is equipped with a spark arresting screen.

N If the engine is down on power,

check the spark arresting screen in the muffler.

N Wait for the muffler to cool down. N Move the slide control to STOP-0.

N Take out the screw (1).

N Take out the screws (2) and remove

the shroud (3).

N Take out the screw (4). N Lift the spark arresting screen (5)

and pull it out.

N Clean the spark arresting screen. If

the screen is damaged or heavily carbonized, fit a new one.

N Refit the spark arresting screen. N Insert the screw and tighten it down

firmly.

N Fit the shroud.

N If the engine is down on power,

difficult to start or runs poorly at idle speed, first check the spark plug.

N Fit a new spark plug after about 100

operating hours – or sooner if the electrodes are badly eroded. Install only suppressed spark plugs of the type approved by STIHL – see "Specifications".

Removing the spark plug

N Move the slide control to STOP-0.

N Pull off the spark plug boot (1). N Unscrew the spark plug.

Spark Arresting Screen in Muffler

249BA059 KN

249BA060 KN

Spark Plug

249BA063 KN

Page 33

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Checking the spark plug

N Clean dirty spark plug. N Check electrode gap (A) and

readjust if necessary – see "Specifications".

N Rectify the problems which have

caused fouling of the spark plug.

Possible causes are:

– Too much oil in fuel mix.

– Dirty air filter.

– Unfavorable running conditions.

If the spark plug comes with a detachable adapter nut (1), screw the adapter onto the thread and tighten it down firmly to reduce the risk of arcing and fire.

Installing the spark plug

N Screw the spark plug (3) into the

cylinder and fit the boot (2) (press it down firmly).

N Check the grease level regularly –

about every 25 hours of operation.

N Unscrew the filler plug (1). If no

grease can be seen on the inside of the filler plug, screw the tube (2) of STIHL gear lubricant for brushcutters (special accessory) into the filler hole.

N Squeeze up to 5 g grease into the

gearbox.

Do not completely fill the gearbox with grease.

N Remove the tube of grease (2). N Refit the filler plug (1) and tighten it

down firmly.

000BA039 KN

000BA045 KN

002BA178 KN

Lubricating the Gearbox

233BA010 KN

Page 34

FS 87, FS 87 R

English

Replacing the Starter Rope

N Push the slide control in direction of

arrow h – to STOP-0.

N Take out the screws (1). N Remove the starter cover (2) from

the housing.

N Ease the spring clip (3) off the

starter post.

N Remove the rope rotor with

washer (4) and pawl (5).

N Remove the remaining rope from

the rotor and starter grip.

N Tie a simple overhand knot in the

new rope and then thread it through the top of the grip and the rope bushing (6).

N Thread the rope through the rotor

and secure it with a simple overhand knot.

N Coat the rope rotor bearing bore

with non-resinous oil.

N Slip the rotor over the starter post –

turn it back and forth to engage the anchor loop of the rewind spring.

Replacing the Starter Rope and Rewind Spring

249BA061 KN

249BA013 KN

249BA014 KN

249BA015 KN

Page 35

FS 87, FS 87 R

English

N Refit the pawl (5) in the rotor. N Fit the washer (4) on the starter

post.

N Use a screwdriver or suitable pliers

to fit the spring clip (3) on the starter post and over the pawl's peg – the spring clip must point counterclockwise – as shown in the illustration.

N Go to "Tensioning the Rewind

Spring".

Replacing a broken rewind spring

N Remove the rope rotor as described

in chapter on "Replacing the starter rope".

The bits of spring may still be under tension and could fly apart when you take them out of the housing. To reduce the risk of injury, wear face protection and work gloves.

N Remove the spring housing and

pieces of spring.

N Lubricate the new spring with a few

drops of non-resinous oil.

N Position the new spring housing,

bottom plate facing up, against the cutouts (arrows).

N Push the spring housing into the

starter cover.

N Reinstall the rope rotor – then go to

"Tensioning the Rewind Spring".

N If the spring pops out of the spring

housing and uncoils: Refit it counterclockwise, starting outside and working inwards.

Tensioning the rewind spring

N Make a loop in the unwound starter

rope and use it to turn the rope rotor six full revolutions in the direction of the arrow.

N Hold the rotor steady. Pull out and

straighten the twisted rope.

N Let go of the rotor. N Release the rope slowly so that it

winds onto the rotor. The starter grip must locate firmly in the rope bushing. If the grip droops to one side: Add one more turn on the rope rotor to increase spring tension.

N When the starter rope is fully

extended it must still be possible to rotate the rotor another half turn. If this is not the case, the spring is overtensioned and could break. Take one turn of the rope off the rotor.

249BA013 KN

249BA018 KN

249BA016 KN

Page 36

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N Fit the starter cover on the housing. N Tighten down the screws firmly.

For periods of 3 months or longer N Drain and clean the fuel tank in a

well ventilated area.

N Dispose of fuel properly in

accordance with local environmental requirements.

N Run the engine until the carburetor

is dry – this helps prevent the carburetor diaphragms sticking together.

N Remove, clean and inspect the

cutting attachment.

N Thoroughly clean the machine – pay

special attention to the cylinder fins and air filter.

N Store the machine in a dry and

secure location – out of the reach of children and other unauthorized persons.

N Use a sharpening file (special

accessory) to sharpen dull cutting attachments. In case of more serious wear or nicks: Resharpen with a grinder or have the work done by a dealer – STIHL recommends a STIHL servicing dealer.

N Resharpen frequently, take away as

little material as possible: two or three strokes of the file are usually enough.

N Resharpen the cutters (1) uniformly

– do not alter the contour or the parent blade (2) in any way.

See cutting attachment packaging for additional sharpening instructions.

Storing the Machine Sharpening Metal Cutting

Blades

002BA083 KN

Page 37

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English

Balancing

N After resharpening about 5 times,

check the cutting attachment for out-of-balance on a STIHL balancer (special accessory) or have it checked by a dealer and rebalanced as necessary – STIHL recommends a STIHL servicing dealer.

Page 38

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Maintenance and Care

The following intervals apply to normal operating conditions only. If your daily work

ing time is longer or operating conditions are difficult (very dusty work area, etc.), shorten the specified intervals accordingly.

before starting work

after finishing work or daily

after each refueling stop

weekly

monthly

every 12 months

if problem

if damaged

if required

Complete machine

Visual inspection (condition, leaks) XX

Clean X

Control handle Check operation XX

Air filter

Clean XX

Replace X

Pickup body in fuel tank

Have checked by dealer

Have replaced by dealer

XXX

Fuel tank Clean XX

Carburetor

Check idle adjustment – the cutting attachment must not turn

Adjusting Idle Speed X

Spark plug

Readjust electrode gap X

Replace after every 100 operating hours

Cooling inlets

Visual inspection X

Clean X

Valve clearance

Check and, if necessary, have adjusted by dealer after first 139 hours of operation

Combustion chamber

Decoke after first 139 hours of opera

tion, then every 150 hours of operation

Spark arresting screen

in muffler

Check XX

Clean or replace XX

All accessible screws and nuts (not adjust

ing screws)

Retighten X

Antivibration elements

Check XXX

Have replaced by dealer

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English

Cutting Attachments

Visual inspection XX

Replace X

Check tightness XX

Metal cutting attachments Sharpen XX

Gearbox lubrication

Check X

Replenish X

Safety labels Replace X

STIHL recommends a STIHL servicing dealer.

not in all versions, market-specific

The following intervals apply to normal operating conditions only. If your daily work

ing time is longer or operating conditions are difficult (very dusty work area, etc.), shorten the specified intervals accordingly.

before starting work

after finishing work or daily

after each refueling stop

weekly

monthly

every 12 months

if problem

if damaged

if required

Page 40

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Observing the instructions in this manual helps reduce the risk of unnecessary wear and damage to the power tool.

The power tool must be operated, maintained and stored with the due care and attention described in this owner's manual.

The user is responsible for all damage caused by non-observance of the safety precautions, operating and maintenance instructions in this manual. This includes in particular:

– Alterations or modifications to the

product not approved by STIHL.

– Using tools or accessories which

are neither approved or suitable for the product or are of a poor quality.

– Using the product for purposes for

which it was not designed.

– Using the product for sports or

competitive events.

– Consequential damage caused by

continuing to use the product with defective components.

Maintenance Work

All the operations described in the "Maintenance Chart" must be performed on a regular basis. If these maintenance operations cannot be performed by the owner, they should be performed by a servicing dealer.

STIHL recommends that you have servicing and repair work carried out exclusively by an authorized STIHL

servicing dealer. STIHL dealers are regularly given the opportunity to attend training courses and are supplied with the necessary technical information.

If these maintenance operations are not carried out as specified, the user assumes responsibility for any damage that may occur. Among other parts, this includes:

– Damage to the engine due to

neglect or deficient maintenance (e.g. air and fuel filters), incorrect carburetor adjustment or inadequate cleaning of cooling air inlets (intake ports, cylinder fins).

– Corrosion and other consequential

damage resulting from improper storage.

– Damage to the machine resulting

from the use of poor quality replacement parts.

Parts Subject to Wear and Tear

Some parts of the power tool are subject to normal wear and tear even during regular operation in accordance with instructions and, depending on the type and duration of use, have to be replaced in good time. Among other parts, this includes:

– Cutting attachments (all types)

– Mounting hardware for cutting

attachments (rider plate, nut, etc.)

– Deflectors for cutting attachments

– Clutch

– Filters (air, fuel)

– Rewind starter

– Spark plug

– Antivibration elements

Minimize Wear and Avoid Damage

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1 Fuel filler cap 2 Carburetor adjusting screws 3 Starter grip 4 Spark plug boot 5 Muffler (some versions with spark

arresting screen) 6 Bike handle (handlebar) 7 Throttle trigger 8 Slide control 9 Throttle trigger interlock 10 Throttle cable retainer 11 Carrying ring 12 Fuel pump 13 Choke knob 14 Air filter cover 15 Fuel tank 16 Machine support 17 Handle support 18 Loop handle 19 Barrier bar 20 Drive tube # Serial number

Main Parts

249BA040 KN

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1 Mowing head 2 Deflector for mowing heads only 3 Blade 4 Deflector for all mowing

attachments 5 Skirt 6 Metal mowing attachment

7 Circular saw blade 8 Limit stop for circular saw blades

only

Engine

STIHL single cylinder four-stroke engine with mixture lubrication

Ignition System

Electronic magneto ignition

Fuel System

All position diaphragm carburetor with integral fuel pump

002BA394 KN

002BA395 KN

Specifications

Displacement: 28.4 cm

Bore: 38 mm Stroke: 25 mm Engine power to

ISO 8893:

0.95 kW (1.3 HP)

at 7,000 rpm Idle speed: 2,800 rpm Cut-off speed (rated): 10,500 rpm Max. output shaft

speed (cutting attachment): 7,500 rpm

Valve clearance Inlet valve: 0.10 mm Exhaust valve: 0.10 mm

Spark plug (resistor type): Bosch USR 7 AC

Electrode gap: 0.5 mm

Fuel tank capacity: 0.53 l

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Weight

Noise and Vibration Data

Noise and vibration data measurements include idling and rated maximum speed with the same duration of exposure.

For further details on compliance with Vibration Directive 2002/44/EC see www.stihl.com/vib/

Sound pressure level L

peq

to ISO 22868

Sound power level L

weq

to ISO 22868

Vibration measurement a

hv,eq

ISO 22867

The K-factor in accordance with Directive 2006/42/EC is 2.5 dB(A) for the sound pressure level and sound power level; the K-factor in accordance with Directive 2006/42/EC is 2.0 m/s

for the vibration measurement.

REACH

REACH is an EC regulation and stands for the Registration, Evaluation, Authorisation and Restriction of Chemical substances.

For information on compliance with the REACH regulation (EC) No. 1907/2006 see www.stihl.com/reach.

Cutting Attachments

Mowing heads

1 STIHL SuperCut 20-2 2 STIHL AutoCut C 25--2 3 STIHL AutoCut 25-2 4 STIHL TrimCut 31-2 5 STIHL FixCut 25-2 6 STIHL PolyCut 20-3

Metal cutting attachments

7 Grass cutting blade 230-2 8 Grass cutting blade 230-4 9 Grass cutting blade 230-8 10 Grass cutting blade 250-40 Spezial 11 Brush knife 250-3 12 Scratcher tooth circular saw blade

200

13 Chisel tooth circular saw blade 200

Use cutting attachments only as specified in the chapter on "Approved Combinations of Cutting Attachment, Deflector, Handle and Harness".

Special accessories for cutting attachments

– Nylon line for mowing heads 1 to 6

– Prewound spool with nylon line for 1

to 4

– Thermoplastic blades, pack of 12;

for 6

– Transport guards for 7 to 13

dry, without cutting attachment and deflector

FS 87: 5.6 kg FS 87 R: 5.3 kg

with mowing head FS 87 with bike handle: 91 dB(A) FS 87 R: 91 dB(A) with metal mowing

attachment FS 87 with bike handle: 90 dB(A) FS 87 R with barrier bar: 90 dB(A)

with mowing head FS 87 with bike handle: 101 dB(A) FS 87 R: 101 dB(A) with metal mowing

attachment FS 87 with bike handle: 99 dB(A) FS 87 R with barrier bar: 99 dB(A)

with mowing head

Handle, left

Handle, right

FS 87 with bike handle: 2.7 m/s22.3 m/s

FS 87 R: 3.3 m/s24.2 m/s

with metal mow

ing attachment

Handle, left

Handle, right

FS 87 with bike handle: 3.5 m/s

2.5 m/s

FS 87 R with bar

rier bar: 2.8 m/s

4.2 m/s

Special Accessories

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Sharpening aids for metal cutting attachments

– Flat sharpening files for 7 to 9, 11

and 12

– File holder with round file, for 13

– Saw set, for 13

– STIHL balancer for 7 to 13

– Sharpening templates (metal or

cardboard), for 11

Mounting hardware for metal cutting attachments

– Thrust washer

– Rider plate

– Nut

Other special accessories

– Safety glasses

– Shoulder strap

– Full harness

– Combination wrench

– Locking pin

– Carburetor screwdriver

– STIHL gear lubricant for

brushcutters

– STIHL filler nozzle for fuels

– Special resin-free lubricating oil

Contact your STIHL dealer for more information on these and other special accessories.

Users of this machine may only carry out the maintenance and service work described in this user manual. All other repairs must be carried out by a servicing dealer.

When repairing the machine, only use replacement parts which have been approved by STIHL for this power tool or are technically identical. Only use highquality replacement parts in order to avoid the risk of accidents and damage to the machine.

STIHL recommends the use of original STIHL replacement parts.

Original STIHL parts can be identified by the STIHL part number, the { logo and the STIHL parts symbol K (the symbol may appear alone on small parts).

ANDREAS STIHL AG & Co. KG Badstr. 115 D-71336 Waiblingen

confirms that the machine described below

conforms to the specifications of Directives 2006/42/EC, 2004/108/EC and 2000/14/EC and has been developed and manufactured in compliance with the following standards:.

EN ISO 11806, EN 55012, EN 61000-6-1

The measured and guaranteed sound power levels were determined according to Directive 2000/14/EC, Annex V, using the ISO 10884 standard.

Measured sound power level

Guaranteed sound power level

Technical documents deposited at:

ANDREAS STIHL AG & Co. KG Produktzulassung (Product Licensing)

Maintenance and Repairs EC Declaration of Conformity

Type: Brushcutter Make: STIHL Type: FS 87

FS 87 R Serial identification: 4180 Displacement: 28.4 cm

FS 87: 104 dB(A) FS 87 R: 104 dB(A)

FS 87: 105 dB(A) FS 87 R: 105 dB(A)

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The year of manufacture and serial number are applied to the product.

Done at Waiblingen, 01.12.2009

ANDREAS STIHL AG & Co. KG

Elsner

Director Group Product Management

All STIHL products comply with the highest quality standards.

An independent organization has certified that all products manufactured by STIHL meet the strict requirements of the ISO 9001 standard for quality management systems in terms of product development, materials purchasing, production, assembly, documentation and customer service.

Quality Certification

000BA025 LÄ

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Page 47

Page 48

www.stihl.com

*04582740121C*

0458-274-0121-C

englisch

Stihl FS 87 Instruction Manual

Specifications and Main Features

Frequently Asked Questions

User Manual