Stihl FS 85, FS 85 R Instruction Manual

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STIHL FS 85, 85 R

Instruction Manual

Page 2

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Contents

English

Guide to Using this Manual 2 Safety Precautions and Working

Techniques 2 Approved Combinations of Cutting

Attachment, Deflector, Handle and Harness 12

Approved Power Tool Attachments 13 Mounting the Bike Handle 14 Mounting the Loop Handle 17

Original Instruction ManualPrinted on chlorine-free paper

Adjusting the Throttle Cable 18 Fitting the Carrying Ring 19 Mounting the Deflector 19 Mounting the Cutting Attachment 20 Fuel 23 Fueling 24 Fitting the Harness 25 Balancing the Machine 27 Starting / Stopping the Engine 27 Transporting the Unit 30 Operating Instructions 32 Cleaning the Air Filter 32 Adjusting the Carburetor 33

Printing inks contain vegetable oils, paper can be recycled.

Spark Plug 35 Lubricating the Gearbox 36 Replacing the Starter Rope and

Rewind Spring 36 Storing the Machine 38 Sharpening Metal Cutting Blades 39 Maintaining the Mowing Head 39 Inspection and Maintenance by

User 40

Inspections and Maintenance by Dealer 41

Maintenance and Care 42 Minimize Wear and Avoid Damage 44 Main Parts 45 Specifications 47 Maintenance and Repairs 48 Disposal 48 EC Declaration of Conformity 49

Dear Customer,

Thank you for choosing a quality engineered STIHL product.

It has been built using modern production techniques and comprehensive quality assurance. Every effort has been made to ensure your satisfaction and trouble-free use of the product.

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

Your

Dr. Nikolas Stihl

0458-393-8321-B. VA2.B20.

0000007829_004_GB

FS 85, FS 85 R

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Guide to Using this Manual

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.

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

Symbols in text

WARNING

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

NOTICE

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.

Safety Precautions and Working Techniques

Some special safety precautions must be observed to reduce the risk of personal injury when operating this power tool because of the very high speed of its cutting attachment.

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

Observe all applicable 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 it is operated 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.

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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 explicitly 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 tools and accessories in order to avoid the risk of accidents and damage to the machine.

STIHL recommends the use of genuine STIHL tools and accessories. They are specifically designed to match the product and meet your performance requirements.

Never attempt to modify your machine 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 your 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.

Clothing must be sturdy but allow complete freedom of movement. Wear snug-fitting clothing, an overall and jacket combination, 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 long hair so that it is above shoulder level.

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

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

WARNING

To reduce the risk of eye injuries, wear close-fitting safety glasses in accordance with European Standard EN 166. Make sure the safety glasses are a comfortable and snug fit.

Wear a face shield and make sure it is a good fit. A face shield alone does not provide adequate eye protection.

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

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.

Wear heavy-duty work gloves made of durable material (e.g. leather).

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002BA079 KN

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

Transporting the Power Tool

Always shut off the engine.

Carry the unit hanging from the shoulder strap or properly balanced by the drive tube.

To reduce the risk of cut injuries, fit transport guard on the cutting attachment, even when carrying the tool for short distances – see also "Transporting the Unit".

To reduce the risk of serious burn injuries, avoid touching hot parts of the machine, including the gearbox.

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

Fueling

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

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.

After fueling, tighten down the fuel tank cap as securely as possible.

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 leak is found, do not start the engine.

Before Starting

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

– Check the fuel system for leaks,

paying special attention to visible parts such as the tank cap, hose connections and the manual fuel pump (on machines so equipped). If there are any leaks or damage, do not start the engine – risk of fire. Have your machine repaired by a servicing dealer before using it again.

– 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

lockout (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.

– Check cutting tool or attachment for

correct and secure assembly and good condition.

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002BA055 KN

002BA080 KN

– 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.

– 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 Machine".

To reduce the risk of accidents, operate your power tool only if it is in a safe condition.

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.

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.

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.

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15m (50ft)

The cutting attachment may catch and fling objects a great distance and cause injury - therefore, do not allow any other persons within a radius of 15 meters of your own position. To reduce the risk of damage to property, also maintain this distance from other objects (vehicles, windows). Even maintaining a distance of 15 meters or more cannot exclude the potential danger.

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

Check and correct the idle speed setting regularly. If the cutting attachment continues to rotate when the engine is idling, have the machine checked by your servicing dealer. STIHL recommends an authorized STIHL servicing dealer.

Take special care in slippery conditions (ice, wet ground, snow), on slopes or uneven ground.

Watch out for obstacles: Roots and tree stumps 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.

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 locations, even if your model is equipped with a catalytic converter.

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, consult your servicing dealer.

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

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

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Inspect the work area: Stones, pieces of metal or other solid objects may be thrown more than 15 meters and cause personal injury or damage the cutting attachment and property (e.g. parked vehicles, windows).

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

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

Always shut off the engine before leaving the machine 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.

– 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.

The gearbox gets hot during operation. To reduce the risk of burn injury, do not touch the gearbox housing.

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 engine'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.

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.

Metal cutting attachments must be sharpened 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 injury from 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.

If a rotating metal cutting attachment makes contact with a rock or other solid object there is a risk of sparking which may cause easily combustible material to catch fire under certain circumstances. Dry plants and scrub are also easily combustible, especially in hot and dry weather conditions. If there is a risk of fire, do not use metal cutting attachments near combustible materials, dry plants or scrub. Always contact your local forest authority for information on a possible fire risk.

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.

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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.

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.

Some of the following symbols are applied to the outside of the deflector to indicate the approved combination of cutting attachment and deflector.

Deflector may be used with mowing heads.

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000BA015 KN

Harness / Strap

Deflector may be used with grass cutting blades.

Deflector must not be used with mowing heads.

Do not use deflector with brush knives, shredder blades or circular saw blades.

Do not use deflector with brush knives, shredder blades, grass cutting blades or circular saw blades.

Deflector may be used with mowing heads. Not approved for use with brush knives, shredder blades or circular saw blades.

Deflector may be used with mowing heads – do not use metal cutting attachments.

Mowing Head with Nylon Line

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.

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

The mowing head comes with an instruction leaflet. Refill the mowing head with nylon line as described in the instruction leaflet.

WARNING

To reduce the risk of serious injury, never use wire or metal-reinforced line in place of the nylon line.

STIHL Polycut Mowing Head with Polymer Blades

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

FS 85, FS 85 R

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

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002BA049 KN

002BA135 KN

000BA020 KN

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.

The PolyCut can also be equipped with mowing line in place of the polymer blades.

The mowing head comes with instruction leaflets. Equip the mowing head with polymers blades or nylon line as described in the instruction leaflets.

WARNING

Never use wire in place of the nylon mowing line – risk of injury.

Risk of Kickout (Blade Thrust) with Metal Cutting Attachments

WARNING

When using metal cutting attachments 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.

WARNING

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

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

Brush Knife

For cutting matted grass, wild growth and scrub and thinning young stands with a stem diameter of no more than 2 cm – do not cut thicker stems – risk of accidents.

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002BA355 KN

002BA509 KN

002BA068 KN

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

To cut wild growth and scrub, lower the brush knife down onto the growth to achieve a shredding effect – always keep the cutting attachment below hip level during this process.

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.

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 such work.

– 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

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

Circular Saw Blade

Suitable for cutting shrubs and trees with a maximum stem diameter of 4 cm.

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.

WARNING

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.

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0000-GXX-3934-A1

Approved Combinations of Cutting Attachment, Deflector, Handle and Harness

Cutting Attachment Deflector, Limit Stop Handle Harness

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Approved Combinations

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

WARNING

For safety reasons only the cutting attachments, deflectors, handles and harnesses 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 AutoCut C 26-2 5 STIHL FixCut 31-2 6 STIHL TrimCut 31-2 7 STIHL DuroCut 20-2 8 STIHL PolyCut 20-3

Metal cutting attachments

9 Grass cutting blade 230-2

(230 mm dia.)

10 Grass cutting blade 260-2

(260 mm dia.)

11 Grass cutting blade 230-4

(230 mm dia.)

12 Grass cutting blade 230-8

(230 mm dia.)

13 Grass cutting blade 250-40 Spezial

(250 mm dia.)

14 Brush knife 250-3

(250 mm dia.)

15 Scratcher tooth circular saw blade

200 (200 mm dia.)

16 Chisel tooth circular saw blade 200

(200 mm dia.)

WARNING

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

Deflectors, Limit Stop

17 Deflector for mowing heads 18 Deflector with 19 skirt and blade, for mowing heads 20 Deflector without skirt and blade, for

metal cutting attachments 9 to 14

21 Limit stop for circular saw blades

Handles

22 Loop handle 23 Loop handle with 24 Barrier bar 25 Bike handle

Harnesses

26 Shoulder strap may be used 27 Shoulder strap must be used 28 Full harness may be used 29 Full harness must be used

Approved Power Tool Attachments

The following STIHL attachments may be mounted to the basic power tool:

Attachment BF Cultivator with pick

2) 3)

FCS FH Power scythe,

HL 0°

HL 145°

HT SP SP 10 SP 20

1) 4)

1) 5)

Not approved for models with bike handle

Limited suitability for models with bike handle

It is not necessary to use the shoulder strap

Use handle hose supplied with the machine

Use flexible shaft supplied with the attachment

Application

tines Edger

adjustable Long reach hedge

trimmer Hedge trimmer,

adjustable Pole saw Special harvester Special harvester Special harvester

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002BA356 KN

002BA128 KN

002BA229 KN

Mounting the Bike Handle

Versions

The trimmer comes in versions with a fixed handle support and a swiveling handle support.

1 Version with fixed handle support –

see "Mounting Bike Handle with Fixed Handle Support".

2 Version with swiveling handle

support – see "Mounting Bike Handle with Swiveling Handle Support".

Mounting Bike Handle with Fixed Handle Support

The fixed handle support is supplied separately and must be mounted to the drive tube.

Mounting the Handlebar

N Mount the handlebar (1) on the

drive tube (2) about 40 cm (16 in) (A) from the engine.

N Place the clamp (3) and handle

support (4) against the drive tube.

N Fit the handlebar (1) in the handle

support – the rubber handle must be on the left (viewed from the engine).

N Place the clamp (5) on the handle

support.

N Insert the screws (6) 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 (7) – the nut (8)

remains in the control handle (9).

N Push the control handle onto the

handlebar (1) until the holes (11) line up – the throttle trigger (10) must point towards the gearbox.

N Insert the screw and tighten it down

firmly.

Fitting the Throttle Cable

NOTICE

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

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250BA046 KN

N Position the throttle cable

retainer (13) and throttle cable (12) against the drive tube.

N Close the throttle cable

retainer (13). The retainer (13) snaps into place.

Adjusting the Throttle Cable N Check adjustment of throttle cable –

see chapter on "Adjusting the Throttle Cable".

Mounting Bike Handle with Swiveling Handle Support

Removing the Clamp Moldings

393BA049

N Hold the lower clamp (1) and upper

clamp (2) firmly together.

N Release the wing screw (3) – the

clamps are loose once the wing screw has been released. They are pushed apart by the two springs (4 and 5).

N Pull out the wing screw – the

washer (6) remains on the wing screw.

N Separate the clamp moldings – the

springs (4 and 5) remain in the lower clamp.

Securing the Handlebar

N Place the handlebar (7) in the lower

clamp (1) so that distance A is no more than 15 cm (6 in).

N Place the upper clamp in position

and hold both clamp moldings together.

N Push the wing screw through the

two clamps as far as stop – hold all parts together and secure them.

The machine is supplied with the swiveling handle support already mounted on the shaft. To mount the handlebar it is necessary to remove the clamp moldings.

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002BA234 KN

Mounting the Control Handle

250BA002

N Place the secured assembly on the

handle support (8) with the wing screw at the side nearest the engine.

N Push the wing screw into the handle

support as far as stop and then screw it down – but do not finally tighten yet.

N Line up the handlebar at a right

angle to the drive tube – check distance A again.

N Tighten down the wing screw firmly.

N Take out the screw (9) – the nut (10)

remains in the control handle (11).

N Push the control handle onto the

handlebar (7) until the holes (13) line up – the throttle trigger (12) must point towards the gearbox.

N Insert the screw (9) and tighten it

down firmly.

Fitting the Throttle Cable

NOTICE

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

N Position the throttle cable

retainer (15) and throttle cable (14) against the drive tube.

N Close the throttle cable

retainer (15). The retainer (15) snaps into place.

Adjusting the Throttle Cable N Check adjustment of throttle cable –

see chapter on "Adjusting the Throttle Cable".

FS 85, FS 85 R

Page 19

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002BA098 KN

002BA099 KN

Swiveling the Handlebar

Transport position

90°

N Loosen the wing screw (3) and

unscrew it until the handlebar (7) can be rotated.

N Rotate the handlebar 90°

counterclockwise and then swing the handles down.

N Tighten down the wing screw (3)

firmly.

Working position N Reverse the sequence described

above to swing the handles up and turn the handlebar clockwise.

Mounting the Loop Handle

Mounting Loop Handle with Barrier Bar

002BA650

N Fit the square nuts (1) in the barrier

bar (2); the holes must line up.

N Place the clamp (3) in the loop

handle (4) and position them both against the drive tube (5).

N Position the clamp (6) against the

drive tube.

N Place the barrier bar (2) in position

as shown.

N Line up the holes. N Insert the screws (7) in the holes

and screw them into the barrier bar (2) as far as stop.

N Go to "Securing the Loop Handle".

FS 85, FS 85 R

Page 20

English

7 8

002BA614 KN

002BA615 KN

002BA163 KN

STOP

249BA017 KN

Mounting the Loop Handle without Barrier Bar

N Place the clamp (3) in the loop

handle (4) and position them both against the drive tube (5).

N Position the clamp (6) against the

drive tube.

N Line up the holes. N Fit washers (8) on the screws (7)

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".

Securing the Loop Handle

The loop handle can be adjusted to suit the height and reach of the operator and the application by changing distance (A).

Recommendation: distance (A): about 20 cm (8 in)

N Slide the handle to the required

position.

N Line up the loop handle (4). N Tighten down the screws until the

loop handle can no longer be rotated on the drive tube. If no barrier bar is fitted – lock the nuts if necessary.

The sleeve (9) (not fitted on all models) must be between the loop handle and the control handle.

Adjusting the Throttle Cable

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.

FS 85, FS 85 R

Page 21

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002BA529 KN

002BA636 KN

002BA637 KN

002BA646 KN

Fitting the Carrying Ring

Polymer Version

For position of carrying ring see "Main Parts".

N Push the carrying ring (1) over the

drive tube.

N Insert the M5 nut in the hex recess

N Fit the M5x14 screw. N Line up the carrying ring. N Tighten down the screw firmly.

in the carrying ring.

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

WARNING

Risk of injury from thrown objects and contact with the cutting attachment. These parts must be fitted to the deflector (1) when you use a mowing head.

Fitting the Skirt

N Slide the lower guide slot of the skirt

onto the deflector – it must snap into position.

Removing the Skirt

FS 85, FS 85 R

N Insert the stop pin into the hole in

the skirt and use it to push the skirt to the left.

N Pull the skirt off the deflector.

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English

002BA638 KN

002BA639 KN

002BA104 KN

0812BA019 KN

0812BA020 KN

Mounting the Blade

N Slide the line limiting blade into the

guide on the skirt.

N Insert the screw and tighten it down

firmly.

Mounting the Limit Stop

WARNING

Risk of injury from thrown objects and contact with the cutting attachment. 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 Cutting Attachment

Placing power tool on the ground

N Shut off the engine. N Lay your power tool on its back so

that the cutting attachment mounting face is pointing up.

Mounting Hardware for Cutting Attachments

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

Machine Supplied without Mounting Hardware

Only mowing heads may be used which mount directly to the shaft (1).

Machine Supplied with Mounting Hardware

Mowing heads and metal cutting attachments may be mounted.

Depending on the cutting attachment, it may be necessary to use the nut (2), rider plate (3) and thrust washer (4).

These parts are included in a kit supplied with the machine and are also available as special accessories.

FS 85, FS 85 R

Page 23

English

002BA569 KN

271BA057 KN

002BA385 KN

Blocking the Shaft

The output shaft (1) must be blocked with the stop pin (2) or screwdriver (2) to mount or remove cutting attachments. These parts come standard with the machine or are available as special accessories.

N Insert the stop pin (2) or

screwdriver (2) in the hole (3) in the gearbox as far as stop – and apply slight pressure.

N Rotate shaft or cutting attachment

until the stop pin slips into position and blocks the shaft.

Removing the Mounting Hardware

N Block the shaft. N Use the combination wrench (1) to

loosen and remove the nut (2) clockwise (left-hand thread).

N Take the thrust washer (3) off the

shaft (4). Do not remove the thrust plate (5).

Mounting the Cutting Attachment

Fitting Mowing Head with Screw Mounting

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

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

firmly.

FS 85, FS 85 R

WARNING

Use a deflector that matches the cutting attachment – see "Mounting the Deflector".

NOTICE

Remove the tool used to block the shaft.

Removing the Mowing Head

N Block the shaft. N Unscrew the mowing head

clockwise.

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English

681BA042 KN

Fitting Mowing Head without Screw Mounting

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

STIHL FixCut 31-2

N Fit the thrust plate (2). N Place the mowing head on the

thrust plate (2).

WARNING

Collar (see arrows) must engage the mowing head's mounting hole.

N Push the thrust washer (3) (convex

side up) over the shaft (1) until it is seated on the base.

N Block the shaft. N Use the combination wrench (5) to

screw the mounting nut (4) onto the output shaft and it tighten down firmly.

WARNING

If the mounting nut has become too loose, fit a new one.

NOTICE

Remove the tool used to block the shaft.

Removing the Mowing Head

N Block the shaft. N Use the combination wrench to

loosen and unscrew the mounting nut counterclockwise from the output shaft.

Mounting Metal Cutting Attachments

Keep the leaflet and packaging of the metal cutting attachment in a safe place.

WARNING

Wear protective gloves to reduce the risk of direct contact with the sharp cutting edges.

Mount only one metal cutting attachment.

Check direction of rotation of cutting attachment

Cutting attachments 2, 4 and 5 may be mounted either way round – they must be turned over regularly to help avoid one-sided wear.

The cutting edges of cutting attachments 1, 3, 6 and 7 must point clockwise.

WARNING

Direction of rotation is indicated by an arrow on the inside of the deflector.

FS 85, FS 85 R

Page 25

English

681BA161 KN

N Place the cutting attachment (8) on

the thrust plate (9).

WARNING

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

Securing the cutting attachment N Fit the thrust washer (10) – convex

side must face up.

N Fit the rider plate (11). N Block the shaft (12). N Use the combination wrench (14) to

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

If the mounting nut has become too loose, fit a new one.

WARNING

NOTICE

Remove the tool used to block the shaft.

Removing the Metal Cutting Attachment

WARNING

Wear protective gloves to reduce the risk of direct contact with the sharp cutting edges.

N Block the shaft. N Unscrew the mounting nut

clockwise.

N Remove cutting attachment and its

mounting hardware from the gearbox – but do not remove the thrust plate (9).

Fuel

Your engine requires a mixture of gasoline and engine oil.

WARNING

For health reasons, avoid direct skin contact with gasoline and avoid inhaling gasoline vapor.

STIHL MotoMix

STIHL recommends the use of STIHL MotoMix. This ready-to-use fuel mix contains no benzol or lead, has a high octane rating and ensures that you always use the right mix ratio.

STIHL MotoMix uses STIHL HP Ultra two-stroke engine oil for an extra long engine life.

MotoMix is not available in all markets.

Mixing Fuel

NOTICE

Unsuitable fuels or lubricants or mix ratios other than those specified may result in serious damage to the engine. Poor quality gasoline or engine oil may damage the engine, sealing rings, hoses and the fuel tank.

Gasoline

Use only high-quality brand-name gasoline with a minimum octane rating of 90 – leaded or unleaded.

FS 85, FS 85 R

Page 26

English

389BA031 KN

Gasoline with an ethanol content of more than 10% can cause running problems in engines with a manually adjustable carburetor and should not be used in such engines.

Engines equipped with M-Tronic deliver full power when run on gasoline with an ethanol content of up to 25% (E25).

Engine Oil

If you mix the fuel yourself, use only STIHL two-stroke engine oil or another high-performance engine oil in accordance with JASO FB, JASO FC, JASO FD, ISO-L-EGB, ISO-L-EGC or ISO-L-EGD.

STIHL specifies STIHL HP Ultra twostroke engine oil or an equivalent highperformance engine oil in order to maintain emission limits over the machine’s service life.

Mix Ratio

STIHL 50:1 two-stroke engine oil: 50 parts gasoline to 1 part oil

Examples

Gasoline STIHL engine oil 50:1 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)

N Use a canister approved for storing

fuel. Pour oil into canister first, then add gasoline and mix thoroughly.

Storing Fuel

Store fuel only in approved safety-type fuel canisters in a dry, cool and safe location protected from light and the sun.

Fuel mix ages – only mix sufficient fuel for a few weeks work. Do not store fuel mix for longer than 30 days. Exposure to light, the sun, low or high temperatures can quickly make the fuel mix unusable.

STIHL MotoMix may be stored for up to 2 years without any problems.

N Thoroughly shake the mixture in the

canister before fueling your machine.

WARNING

Pressure may build up in the canister – open it carefully.

N Clean the fuel tank and canister

from time to time.

Dispose of remaining fuel and cleaning fluid properly in accordance with local regulations and environmental requirements.

Fueling

Preparations

N Before fueling, clean the filler cap

and the area around it to ensure that no dirt falls into the tank.

N Position the machine so that the

tank cap faces up.

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 for fuel (special accessory).

FS 85, FS 85 R

Page 27

English

002BA441 KN

002BA228 KN

N Open the tank cap. N Fill up with fuel.

WARNING

After fueling, tighten down the filler cap as securely as possible by hand.

Fitting the Harness

The type and style of the harness/shoulder strap 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

Full Harness

N Put on the harness (1) and close the

locking plate (3).

N Adjust the length of the strap – with

the machine attached, the carabiner (2) must be about a hand's width below your right hip.

N Balance the machine – see

"Balancing the Machine".

FS 85, FS 85 R

N Put on the shoulder strap (1). N Ad just t h e leng th of t he strap s o that

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

N Balance the machine – see

"Balancing the Machine".

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002BA660 KN

002BA661 KN

Attaching Machine to 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.

Disconnecting Machine from Harness

N Press down the bar on the

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

Throwing Off the Machine

If you are using a shoulder strap: Practice slipping the strap off your shoulder.

If you are using a full harness: Practice quickly opening the locking plate and slipping the harness straps off your shoulders.

WARNING

The machine must be quickly thrown off in the event of imminent danger. Practice removing and putting down the machine as you would in an emergency. To avoid damage, do not throw the unit to the ground when practicing.

Practice quickly detaching the power tool from the carabiner as described under "Disconnecting Machine from Harness".

FS 85, FS 85 R

Page 29

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002BA662 KN

002BA388 KN

002BA389 KN

STOP

002BA182 KN

START

STOP-

Balancing the Machine

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 Loosen the screw (1). N Slide the carrying ring (2) along the

drive tube.

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

Balanced positions

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

N should just touch the ground.

Circular saw blades 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.

Starting / Stopping the Engine

Controls

Control handle on handlebar

1 Throttle trigger lockout 2 Throttle trigger 3 Slide control

FS 85, FS 85 R

Page 30

English

STOP

5 6

002BA181 KN

START

STOP-

393BA017 KN

393BA018 KN

002BA038 KN

002BA040 KN

Control handle on drive tube

1 Throttle trigger lockout 2 Throttle trigger 3 Slide control

Positions of slide control

4STOP-0 – engine off – ignition is

switched off

5 F – normal run position – the engine

is running or can start

6START – ignition is switched on –

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

the engine can start

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 lever (8) to:

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.

N Press the manual fuel pump

bulb (9) at least five times – even if the bulb is filled with fuel.

Cranking

N Place the unit on the ground: It must

rest securely on the engine support and the deflector.

N If fitted: Remove the transport guard

from the cutting attachment.

To reduce the risk of accidents, check that the cutting attachment is not touching the ground of any other obstacles.

N Make sure you have a firm footing,

either standing, stooping or kneeling.

N Hold the unit firmly on the ground

with your left hand and press down – do not touch the throttle trigger or lockout lever – your thumb should be under the fan housing.

NOTICE

Do not stand or kneel on the drive tube.

FS 85, FS 85 R

Page 31

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002BA072 KN

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.

NOTICE

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 Continue cranking.

When engine begins to fire

N Set the choke lever to e. N continue cranking until the engine

runs.

As soon as the engine runs N Blip the throttle trigger immediately.

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

WARNING

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.

Stopping 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 engine does not start

Choke lever If you did not move the choke lever to e

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

N Set the choke lever 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. N Open the throttle wide. 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 lever 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 manual

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

N Set the choke lever to suit the

engine temperature.

N Now start the engine.

FS 85, FS 85 R

Page 32

English

681BA268 KN

681BA269 KN

681BA270 KN

681BA272 KN

681BA268 KN

681BA269 KN

681BA271 KN

681BA272 KN

Transporting the Unit

Using Transport Guard

The type of transport guard depends on the metal cutting attachment supplied with the machine. Transport guards are available as special accessories.

230 mm Grass Cutting Blades

250 mm Brush Knives

FS 85, FS 85 R

Page 33

English

681BA301 KN

681BA275 KN

681BA305 KN

681BA311 KN

681BA302 KN

681BA275 KN

Grass Cutting Blades up to 260 mm

N Disconnect wire rod from the

transport guard.

N Swing wire rod outwards.

Circular Saw Blades

N Fit the transport guard on the cutting

attachment from below.

N Disconnect wire rod from the

transport guard.

FS 85, FS 85 R

N Swing wire rod into position. N Hook wire rod to the transport

guard.

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English

681BA276 KN

681BA277 KN

392BA049 KN

Operating Instructions Cleaning the Air Filter

N Swing wire rod outwards. N Fit transport guard on saw blade

from below, making sure the limit stop is properly seated in the recess.

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

Dirty air filters reduce engine power, increase fuel consumption and make starting more difficult.

If there is a noticeable loss of engine power

N Set the choke lever to g.

N Swing wire rod into position. N Hook wire rod to the transport

guard.

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".

N Loosen the screw (1) and remove

the filter cover (2).

N Clean away loose dirt from around

the filter.

N Remove the foam and felt filter

elements.

FS 85, FS 85 R

Page 35

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392BA050 KN

392BA051 KN

265BA024 KN

3 / 4

N Wash the foam element in a clean,

non-flammable solution (e.g. warm soapy water) and then dry.

N Fit a new felt element – do not wash.

As a temporary measure you can knock it out on the palm of your hand or blow it out with compressed air.

Replace any damaged parts.

N Fit the foam filter element (3) in the

filter cover.

Adjusting the Carburetor

The carburetor comes from the factory with a standard setting.

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

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

Standard Setting

N Shut off the engine. N Mount FS cutting attachment,

power tool attachment or KombiTool.

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

and clean or replace as necessary.

N Turn high speed screw (H)

counterclockwise as far as stop (no more than 3/4 turn).

N Turn the low speed screw (L)

carefully clockwise as far as stop, then turn it back 1 turn

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

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

N Place the felt element (4) (lettering

facing inwards) in the filter housing (5).

N Fit the filter cover. N Tighten down the screw in the filter

cover firmly.

FS 85, FS 85 R

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 cutting attachment.

Page 36

English

Rule of thumb:

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

Conditions for adjustment

WARNING

Adjust the high speed screw (H) only if you are using a mowing head, making sure the cutting lines are full length (as far as the line limiter blade on the deflector).

If a metal cutting attachment is mounted, use the standard setting and adjust the high speed screw (H) as described above under "Rule of thumb".

N Carry out the standard setting. N Start the engine and, with the

mowing head mounted, warm it up 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 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 in each case.

Adjust 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.

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

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

Cutting attachment runs when engine is idling

N Turn the idle speed screw (LA)

counterclockwise until the cutting attachment stops moving and then rotate the screw another 1/2 to 1 turn in the same direction.

WARNING

If the 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 Idle setting is too lean: Rotate the

low speed screw (L) about 1/4 turn counterclockwise until the engine runs and accelerates smoothly.

Erratic idling behavior

Idle setting is too rich:

N Rotate the low speed screw (L)

about 1/4 turn clockwise until the engine runs and accelerates smoothly.

FS 85, FS 85 R

Page 37

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393BA053 KN

000BA039 KN

000BA045 KN

Spark Plug

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.

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.

N Use resistor type spark plugs with a

properly tightened adapter nut.

Installing the spark plug

N Screw home the spark plug, fit the

boot and press it down firmly.

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

FS 85, FS 85 R

WARNING

Arcing may occur if the adapter nut (1) is loose or missing. Working in an easily combustible or explosive atmosphere may cause a fire or an explosion. This can result result in serious injuries or damage to property.

Page 38

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0000-GXX-0536-A0

392BA013 KN

392BA014 KN

Lubricating the Gearbox

Check grease level after every 25 hours of operation and re-lubricate if necessary.

N Remove the screw plug (1). N If no grease can be seen on the

inside of the screw plug (1): Screw the tube (2) of STIHL gear lubricant (special accessory) into the filler hole.

N Squeeze no more than 5 g (1/5 oz)

grease into the gearbox.

NOTICE

Do not completely fill the gearbox with grease.

N Unscrew the tube (2). N Insert the screw plug (1) and tighten

it down firmly.

Replacing the Starter Rope and Rewind Spring

Removing the Starter Cover

N Take out the screws (1). N Lift the cover (2) away from the

tank (3) and pull it out from under the shroud (4).

Removing the Rope Rotor

N Take out the screw (5) and remove

the rope rotor.

WARNING

The rewind spring is seated in the rope rotor and may pop out and uncoil if care is not taken. The pieces of broken spring may be under tension and fly apart unexpectedly when you remove the rope rotor – to help reduce the risk of injury, wear a face shield and work gloves.

FS 85, FS 85 R

Page 39

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392BA015 KN

392BA024 KN

389BA029 KN

a = 2mm

(0.08 in)

Replacing the Starter Rope

N Use a screwdriver to pry the cap (6)

out of the starter grip.

N Remove the remaining rope from

the rotor and grip, making sure the ElastoStart sleeve is not pushed out of the 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 (7).

N Refit the cap in the grip.

N Thread the rope through the rotor

and secure it with a simple overhand knot.

N Go to "Installing the Rope Rotor".

Replacing a Broken Rewind Spring

Two types of replacement springs are available from the factory:

– A ready-to-fit rewind spring secured

with a wire retainer.

– A rope rotor with pre-installed

rewind spring.

Installing the ready-to-fit rewind spring N Lubricate the spring with a few

drops of resin-free oil – see "Special Accessories" – do not open the wire retainer!

N Carefully remove the parts of the old

spring from the starter cover and rope rotor.

N Insert the new rewind spring in the

rope rotor and, at the same time, engage the outer spring loop in the rotor’s recess – the wire retainer slips off in this process. If the spring pops out and uncoils, refit it in the counterclockwise direction, starting outside and working inwards.

N Go to "Installing the Rope Rotor".

Installing rope rotor with rewind spring N Carefully unpack the new rope rotor

with rewind spring. The spring may pop out if not handled with care –risk of injury.

N Lubricate the spring with a few

drops of resin-free oil – see "Special Accessories".

N Go to "Installing the Rope Rotor".

Installing the Rope Rotor

N Check dimension "a" for inner

spring anchor loop and bend it slightly if necessary.

N Coat rope rotor bearing bore with

resin-free oil – see "Special Accessories".

FS 85, FS 85 R

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392BA025 KN

392BA044 KN

393BA045 KN

N Slip the rotor over the starter post –

turn it back and forth to engage the anchor loop (8) of the rewind spring.

N Insert the screw (5) and tighten it

down firmly.

N Go to "Tensioning the Rewind

Spring".

Tension the rewind spring.

– The starter grip must be firmly

seated in the rope bushing. If the grip droops to one side: Add one more turn on rope rotor to increase spring tension

– 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.

N Go to "Fitting the Starter Cover".

Fitting the Starter Cover

Storing the Machine

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. Coat metal cutting attachments with corrosion inhibitor.

N Thoroughly clean the machine. N Clean the air filter. N Store the machine in a dry and

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

N Make a loop in the unwound starter

rope and use it to turn the rope rotor six full revolutions counterclockwise.

N Hold the rotor steady. Pull out and

N Release the rope rotor. N Release the rope slowly so that it

N Check spring tension:

straighten the twisted rope.

winds onto the rotor.

N Push the upper mounting boss of

the cover (2) under the shroud (4).

N Line up the tank and push the

bottom of the cover onto the tank.

N Insert the screws (1) and tighten

them down firmly.

FS 85, FS 85 R

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English

002BA083 KN

002BA104 KN

Sharpening Metal Cutting Blades

N Use a sharpening file (see "Special

Accessories") 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 Sharpen frequently, take away as

little metal as possible – two or three strokes of the file are usually enough.

Balancing

N After resharpening about 5 times,

check the cutting attachment for out-of-balance on a STIHL balancer – see “Special Accessories” – or have it checked by a dealer and rebalanced as necessary – STIHL recommends a STIHL servicing dealer.

Maintaining the Mowing Head

Placing power tool on the ground

N Shut off the engine. N Lay your power tool on its back so

that the cutting attachment mounting face is pointing up.

Replacing Nylon Line

Always check the mowing head for signs of wear before replacing the nylon line.

N Resharpen the teeth (1) uniformly –

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

See cutting attachment packaging for additional sharpening instructions. Keep the packaging for future reference.

FS 85, FS 85 R

WARNING

If there are signs of serious wear, replace the complete mowing head.

The nylon mowing line is referred to as "nylon line" or "line" in the following.

The mowing head is supplied with illustrated instructions for replacing the nylon line. Keep the instructions for the mowing head in a safe place.

N If necessary, remove the mowing

head.

Page 42

English

389BA032 KN

Adjusting Nylon Line

STIHL SuperCut

Fresh line is advanced automatically if the remaining line is at least 6 cm (2 1/2 in) long. The blade on the deflector trims overlong lines to the correct length.

STIHL AutoCut N With the engine running, hold the

rotating mowing head above the grass surface.

N Tap it on the ground once – fresh

line is advanced and the blade on the deflector trims it to the right length.

Fresh line is advanced every time the mowing head is tapped on the ground. For this reason observe the mowing head's cutting performance during operation. If the mowing head is tapped on the ground too often, the line limiting blade will unnecessarily cut off unused lengths of nylon line.

Line feed operates only if both lines are still at least 2.5 cm (1 in) long.

Replacing Nylon Line

STIHL PolyCut

Precut lengths of nylon line can be fitted to the PolyCut in place of the cutting blades.

STIHL DuroCut, STIHL FixCut 31-2, STIHL PolyCut

WARNING

To reduce the risk of injury, always shut off the engine before refilling the mowing head.

N Fit precut lengths of nylon line in the

mowing head as described in the instructions supplied.

Replacing Cutting Blades

STIHL PolyCut

Always check the mowing head for signs of wear before installing new cutting blades.

WARNING

If there are signs of serious wear, replace the complete mowing head.

The thermoplastic cutting blades are referred to as "blades" in the following.

The mowing head is supplied with illustrated instructions for replacing the blades. Keep the instructions for the mowing head in a safe place.

WARNING

To reduce the risk of injury, always shut off the engine before installing the blades.

N Remove the mowing head. N Replace blades as shown in the

illustrated instructions.

N Mount the mowing head on the

machine.

Inspection and Maintenance by User

Changing the Fuel Pickup Body

Change the fuel pickup body every year:

N Drain the fuel tank. N Use a hook to pull the fuel pickup

body out of the tank and take it off the hose.

N Push the new pickup body into the

hose.

N Place the pickup body in the tank.

Spark Arresting Screen in Muffler

If the engine is down on power, check the spark arresting screen in the muffler.

FS 85, FS 85 R

Page 43

N Lift the spark arresting screen and

392BA035 KN

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.

English

Inspections and Maintenance by Dealer

Maintenance Work

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

Antivibration Element

393BA055 KN

A vibration-absorbing rubber element is installed between the powerhead and the drive tube. Have it checked if there are signs of wear or a noticeable increase in vibration levels.

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English

Maintenance and Care

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

as required

Visual inspection (condition, leaks) XX

Complete machine

Control handle Check operation XX

Air filter

Manual fuel pump (if fitted)

Pickup body (filter) in fuel tank

Fuel tank Clean XX

Carburetor

Spark plug

Cooling inlets

Spark arresting screen in muffler

All accessible screws and nuts (not adjusting screws)

Antivibration elements

Clean X

Replace any damaged parts XX

Visual inspection X X

Clean XX

Replace X

Check X

Have repaired by servicing dealer

Check X

Replace XXX

Check idle adjustment – the cutting attachment must not rotate

Adjust idle speed X

Adjust electrode gap X

Replace after every 100 operating hours

Visual inspection X

Clean X

Check X X

Clean or replace XX

Re-tighten X

Check

Have replaced by servicing dealer

XXX

FS 85, FS 85 R

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English

before starting work

after finishing work or daily

after each refueling stop

weekly

monthly

every 12 months

if problem

if damaged

Visual inspection XX

Cutting attachment

Metal cutting attachment Sharpen X X

Gearbox lubrication

Safety labels Replace X

STIHL recommends an authorized STIHL servicing dealer.

see chapter "Inspections and Maintenance by Dealer", section "Antivibration Elements"

Replace X

Check tightness XX

Check X

Replenish X

as required

FS 85, FS 85 R

Page 46

English

Minimize Wear and Avoid Damage

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

FS 85, FS 85 R

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Main Parts

393BA057 KN

1 2 3

English

1 Manual fuel pump 2 Choke lever 3 Carburetor adjusting screws 4 Starter grip 5 Tank cap 6 Fuel tank 7 Muffler with spark arresting screen 8 Throttle trigger 9 Slide control 10 Throttle trigger lockout 11 Bike handle (handlebar) 12 Handle support 13 Throttle cable retainer 14 Carrying ring (not all markets,

country-specific) 15 Spark plug boot 16 Air filter cover 17 Machine support 18 Wing screw 19 Barrier bar (country specific) 20 Loop handle 21 Drive tube # Serial number

FS 85, FS 85 R

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English

002BA644 KN

1 Drive tube 2 Mowing head 3 Deflector for mowing heads only 4 Line limiting blade 5 Deflector for all mowing

attachments 6 Skirt for mowing heads 7 Metal mowing attachment 8 Circular saw blade 9 Limit stop for circular saw blades

only

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Specifications

Engine

Single cylinder two-stroke engine

Displacement: 25.4 cc Bore: 34 mm Stroke: 28 mm Engine power to

ISO 8893:

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

speed (cutting attachment): 7,500 rpm

Ignition System

Electronic magneto ignition

Spark plug (resistor type):

Electrode gap: 0.5 mm

Fuel System

All position diaphragm carburetor with integral fuel pump

Fuel tank capacity: 440 cc (0.44l)

0.95 kW (1.3 bhp) at 8,500 rpm

Bosch WSR 6 F, NGK BPMR 7 A

Weight

Dry, without cutting attachment and deflector

FS 85: 5.2 kg FS 85 R: 4.9 kg

Overall length

without cutting attachment 1760 mm

Features

R Loop handle

Noise and Vibration Data

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

Cutting Attachment

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

Sound pressure level L

to ISO 22868

with mowing head FS 85 with bike handle: 94 dB(A) FS 85 R: 94 dB(A) with metal mowing

attachment FS 85 with bike handle: 94 dB(A) FS 85 R with barrier bar: 94 dB(A)

Sound power level L

to ISO 22868

with mowing head FS 85 with bike handle: 109 dB(A) FS 85 R: 109 dB(A) with metal mowing

attachment FS 85 with bike handle: 109 dB(A) FS 85 R with barrier bar: 109 dB(A)

Vibration level a

with mowing head

FS 85 with bike handle: 2.9 m/s

FS 85 R: 4.6 m/s24.6 m/s

with metal mowing attachment

FS 85 with bike handle: 2.1 m/s

FS 85 R: 4.4 m/s25.6 m/s

to ISO 22867

hv,eq

Handle, left

Handle, right

3.6 m/s

Handle, right

3.3 m/s

Interchangeable Attachment

The noise and vibration data of the approved attachments are listed in the instructions supplied with each attachment.

The K-factor in accordance with Directive 2006/42/EC is 2.0 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 level.

REACH

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

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000BA073 KN

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

Exhaust Emissions

The CO

value measured in the EU type

approval procedure is specified at www.stihl.com/co2.

The measured CO

value was

determined on a representative engine in accordance with a standardized test procedure under laboratory conditions and does not represent either an explicit or implied guarantee of the performance of a specific engine.

The applicable exhaust emission requirements are fulfilled by the intended usage and maintenance described in this instruction manual. The type approval expires if the engine is modified in any way.

Maintenance and Repairs Disposal

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).

Observe all country-specific waste disposal rules and regulations.

STIHL products must not be thrown in the garbage can. Take the product, accessories and packaging to an approved disposal site for environmentfriendly recycling.

Contact your STIHL servicing dealer for the latest information on waste disposal.

FS 85, FS 85 R

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EC Declaration of Conformity

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

Germany

declare in exclusive responsibility that

Category: Trimmer Make: STIHL Model: FS 85

FS 85 R Serial identification: 4137 Displacement: 25.4 cc

conforms to the relevant provisions of Directives 2011/65/EU, 2006/42/EC, 2014/30/EU and 2000/14/EC and has been developed and manufactured in compliance with the following standards in the versions valid on the date of production:

EN ISO 11806-1, 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

Done at Waiblingen, 28.11.2018

ANDREAS STIHL AG & Co. KG

Thomas Elsner

Director Product Management and Services

109 dB(A)

Guaranteed sound power level

111 dB(A)

Technical documents deposited at:

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

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

FS 85, FS 85 R

Page 52

0458-393-8321-B

AUS

www.stihl.com

*04583938321B*

0458-393-8321-B

Stihl FS 85, FS 85 R Instruction Manual

Specifications and Main Features

Frequently Asked Questions

User Manual