STIHL FS 131 Line Trimmer Instruction Manual
- October 30, 2023
- STIHL
Table of Contents
FS 131 Line Trimmer
Product Information: FS 131, 131 R
The FS 131, 131 R is a power tool designed for cutting grass, wild growth, shrubs, scrub, bushes, small diameter trees and similar materials. It comes with approved combinations of cutting attachments and accessories explicitly approved for this power tool model by STIHL or are technically identical.
The power tool features pictograms such as fuel tank, fuel mixture of gasoline
and engine oil, operate decompression valve, manual fuel pump, tube of grease
intake air for summer and winter operation, and handle heating. The meanings
of the pictograms are explained in the user manual.
STIHL’s philosophy is to continually improve all of its products. Therefore,
some changes, modifications, and improvements may not be covered in the user
manual.
Product Usage Instructions: FS 131, 131 R
- Read the user manual carefully before operating the power tool.
- Ensure that children, animals, and bystanders remain at a distance when operating the power tool.
- Attend a special course to learn how to operate the power tool.
- Lay down the machine in such a way that it does not endanger anyone when not in use. Ensure that the machine cannot be used without authorization.
- The user is responsible for accidents or risks involving third parties or their property.
- Do not lend or rent your power tool without the user manual. Be sure that anyone using it understands the information contained in the manual.
- The use of machines that emit noise may be limited to certain hours of the day as specified by national and/or regional or local regulations.
- Anyone operating the machine must be well-rested, in good physical health, and in good mental condition.
- If you have any condition that might be aggravated by strenuous work, check with your doctor before operating a machine.
- If you have a pacemaker, consult your physician and the pacemaker manufacturer to reduce any health risk as the ignition system of your machine produces an electromagnetic field of very low intensity that may interfere with some pacemakers.
- Anyone who has consumed alcohol or drugs or medicines affecting their ability to react must not operate a power tool.
- Use only approved combinations of cutting attachments and accessories for this power tool model by STIHL or are technically identical. If you have any questions in this respect, consult your dealer. Use only high-quality parts and accessories to avoid the risk of accidents and damage to the machine.
FS 131, 131 R
2 – 40
Instruction Manual
Original Instruction Manual 0000007895_013_GB
Printed on chlorine-free paper Printing inks contain vegetable oils, paper can be recycled.
Operate manual fuel pump
Tube of grease Intake air: Summer operation
Intake air: Winter operation
Handle heating
1.2 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.
1.3 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 man- ual.
2 Safety Precautions and Working Techniques
Because the machine is a high-speed fast-cutting power tool, special safety
precautions must be observed to reduce the risk of personal injury. It is
important that you read and understand the User Manual before commissioning
and keep it in a safe place for future reference. Non-com- pliance with the
User Manual may cause serious or even fatal injury. Observe all applicable
local safety regulations, e.g. by trade organizations, social insurance
institutions, labor safety authorities etc. If you have never used a power
tool before: Have your dealer or other experienced user show you how to
operate your machine or
© ANDREAS STIHL AG & Co. KG 2022 0458-432-8321-B. VA2.E22.
2
0458-432-8321-B
2 Safety Precautions and Working Techniques
attend a special course to learn how to operate it.
Minors should never be allowed to use the machine except for apprentices
over the age of 16 when working under supervision.
Children, animals and bystanders must remain at a distance.
When not using the machine, it must be laid down in such a way that it does
not endanger anyone. Ensure that the machine cannot be used without
authorization.
The user is responsible for accidents or risks involving third parties or
their property.
Do not lend or rent your power tool without the User Manual. Be sure that
anyone using it under- stands the information contained in this manual.
The use of machines that emit noise may be limi- ted to certain hours of the
day as specified by national and/or regional or local regulations.
Anyone operating the machine must be well res- ted, in good physical health
and in good mental condition.
If you have any condition that might be aggrava- ted by strenuous work, check
with your doctor before operating a machine.
If you have a pacemaker: The ignition system of your machine produces an
electromagnetic field of very low intensity. This field may interfere with
some pacemakers. STIHL recommends that per- sons with pacemakers consult their
physician and the pacemaker manufacturer to reduce any health risk.
Anyone who has consumed alcohol or drugs or medicines affecting their ability
to react must not operate a power tool.
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.
The machine must not be used for any other pur- poses 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 your dealer. Use only high quality parts
and accessories. in order to avoid the risk of acci- dents and damage to the
machine.
English
STIHL recommends the use of original STIHL tools and accessories. They are
specifically designed to match the product and meet your performance
requirements.
Never attempt to modify your power tool 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 high-pressure washer to clean the power tool. The solid jet of
water may damage parts of the unit.
The guard provided with your machine may not protect the operator from all
foreign objects (gravel, glass, wire etc.) ejected by the revolving cutting
attachment. Ejected objects may also ric- ochet and strike the operator.
2.1 Clothing and equipment
Wear proper protective clothing and equipment. Clothing must be sturdy but
allow complete freedom of movement. Wear close-fitting clothes such as a
boiler suit, not a loose jacket. Do not wear clothing which could become
trapped in wood, brush or moving parts of the machine. Do not wear a scarf,
necktie or jewelry. Tie up and confine long hair above your shoulders. Wear
safety boots with steel toe caps and non-slip soles.
Sturdy shoes with non-slip shoes are permissible 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
snug fit.
Wear face protection and make sure it is a good fit. Face protection alone is
not sufficient to pro- tect the eyes.
Wear “personal” sound protection, e.g. ear defenders.
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.
0458-432-8321-B
3
English
Wear sturdy protective gloves made of a resistant material (e. g. leather).
STIHL can supply a comprehensive range of per- sonal protective equipment.
2.2 Transporting the machine
2 Safety Precautions and Working Techniques
Open the fuel cap carefully to allow any pressure build-up in the tank to
release slowly and avoid fuel spillage.
Only refuel the machine in a well ventilated place. If fuel has been spilled,
immediately clean the machine do not allow your clothes to be splashed with
fuel. If that happens, change your clothes at once.
After refueling, close the fuel cap as tightly as possible.
Always stop the engine. Carry the machine hanging on the harness or by the
shaft so that it is balanced. To reduce the risk of cut injuries, fit
transport guard on the cutting attachment, even when car- rying the tool for
short distances see also “Transporting the Unit”.
Avoid touching hot parts of the machine and gearbox risk of burns!
By vehicle: When transporting in a vehicle, prop- erly secure your machine to
prevent turnover, damage and fuel spillage.
2.3 Refueling
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.
4
002BA079 KN
This helps reduce the risk of unit vibrations caus- ing an incorrectly
tightened fuel cap to loosen or come off and spill quantities of fuel.
Check for leaks. Do not start the engine if there is a fuel leak serious or
fatal burns could result!
2.4 Before starting
Check that your power tool is properly assem- bled and in good condition
refer to appropriate chapters in the User Manual. Check the fuel system for
leaks, especially the
visible parts, e. g., fuel cap, hose connections, manual fuel pump (only in
machines with a manual fuel pump). In case of leakage and damage, do not start
the engine risk of fire! Have the machine serviced by a dealer before using
it Use only an approved combination of cutting attachment, deflector, handle
and harness. All parts must be assembled properly and securely The stop
switch must be easy to push Check the choke lever, throttle trigger and
throttle trigger lockout for smooth action throttle trigger must return
automatically to idle position. The choke lever must spring back from the g
and < positions to the run posi- tion F when the throttle trigger lockout and
throttle trigger are squeezed Check that the spark plug boot is secure a
loose boot may cause sparking that could ignite combustible fumes and cause a
fire! Cutting attachment or interchangeable attach- ment: correctly fitted,
secure and in perfect condition Safety devices (e. g., deflector for cutting
attachments, rider plate) for damage and/or wear. Always replace damaged
parts. Do not use the machine with a damaged deflector or worn rider plate (if
the writing and arrows are no longer discernible)
0458-432-8321-B
2 Safety Precautions and Working Techniques
Never attempt to modify the controls or safety devices
Keep the handles dry and clean free from oil and dirt this is important
for safe control of the machine
Adjust the harness and handle(s) to suit your height and reach. Observe the
chapter “Fitting the Harness” “Balancing the machine”
To reduce the risk of personal injury, do not operate your power tool if it is
damaged or not properly assembled!
To prepare for emergencies when using a har- ness: Practice setting down the
machine quickly. To avoid damage, do not throw the unit to the ground when
practicing.
2.5 Starting the engine
Start the engine at least 3 meters from the fuel- ing 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.
This is a one-person machine ensure that there is no-one within 15 meters of
the machine, not even when starting the power tool! Risk of injury due to
ejected objects!
Avoid contact with the cutting attach- ment risk of injury!
Do not drop-start the power tool start the engine as described in the User
Manual. The cutting attachment runs on for a short while after releas- ing the
throttle trigger coasting effect!
Check engine idling: The cutting attachment must remain at a standstill when
the engine idles throttle trigger released.
Keep easily combustible materials (e. g., wood chips, bark, dry grass, fuel)
away from hot exhaust gases and hot muffler surfaces risk of fire!
2.6 Holding and guiding the machine
Always hold the unit firmly with both hands on the handles.
Make sure you always have good balance and secure footing.
0458-432-8321-B
2.6.1
English For versions with bike handle
002BA055 KN
Right hand on control handle, left hand on grip on handlebar.
2.6.2 For versions with loop handle
002BA080 KN
For versions with loop handle and loop handle with barrier bar, left hand on
the loop handle, right hand on the control handle even if you are left-
handed.
2.7 While working
Make sure you always have good balance and secure footing.
In the event of impending danger or in an emer- gency, switch off the engine
immediately by pressing the stop switch.
15m (50ft)
There is a risk of accident from ejected objects within a wide area around the
working area, so you must ensure that there is no-one within a 15 m radius of
the machine. This distance must also be maintained in relation to objects
(vehi- cles, window panes) risk of property damage! Even at a distance over
15 m, danger cannot be ruled out.
Check that the engine is properly idling so that the cutting tool will not
continue rotating after you release the throttle trigger.
Check and correct the idle speed setting at regu- lar intervals. If the
cutting attachment still rotates
5
English
at idle speed, have your dealer make proper adjustments or repairs. STIHL
recommends you have this work done by a STIHL servicing dealer.
Take special care in slippery conditions damp, snow, ice, on slopes or
uneven ground.
Watch out for obstacles: tree stumps, roots risk of tripping or stumbling!
Only work while standing on the ground, never on a ladder or mobile elevated
work platform.
Be particularly alert and cautious when wearing hearing protection because
your ability to hear warnings (shouts, alarms, etc.) is restricted.
Take breaks when you start getting tired or feel- ing fatigue risk of
accidents!
Work calmly and carefully in daylight conditions and only when visibility is
good. Proceed with caution, do not put others in danger.
As soon as the engine is running, the power machine generates toxic exhaust
gas.As soon as the engine is running, the power machine gener- ates toxic
exhaust gas. These gases may be odorless and invisible and may contain
unburned hydrocarbons and benzene. Never run the engine indoors or in poorly
ventilated loca- tions, 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 con-
fined locations.
Stop work immediately if you start suffering from nausea, headaches, impaired
vision (e.g. your field of vision gets smaller), impaired hearing, dizziness,
or impaired concentration these symptoms may possibly be the result of too-
high exhaust gas concentration Risk of accidents!
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. Com- bustible fuel vapor may escape from the fuel sys- tem.
Dust, fumes and smoke produced while working may be hazardous to health. Wear
respiratory protection in case of heavy dust or smoke emis- sion.
2 Safety Precautions and Working Techniques
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 in particular that the fuel system has no leaks and the safety equipment
is fully operative. Never use a power tool that is no longer safe to operate.
In case of doubt, contact a dealer.
Do not operate your power tool in the starting throttle position engine
speed cannot be con- trolled in this position.
To reduce the risk of injury from ejec- ted objects, never operate the unit
without the correct deflector for the type of cutting attachment being used.
Check the work site rocks, metal objects etc. may be caught up and ejected
possibly over a distance of 15 m risk of injury! They can also damage the
cutting attachment and other property (e. g. parking vehicles, windows).
Be particularly careful when working on difficult, densely grown terrain.
When mowing in high shrubbery, under shrub- bery and hedges: Hold the cutting
tool at a work- ing height of at least 15 cm avoid risks to ani- mals.
Always shut off the engine before leaving the unit unattended.
Examine the cutting attachment periodically at short intervals and as soon as
you note any noticeable changes: Stop the engine, hold the machine securely,
allow the cutting attachment to come to a stop Check condition and secure
fitting; watch out
for cracks Ensure that the cutting blades are sharp Replace damaged or
blunt cutting attachments
immediately, even in the event of minor hair- line cracks
Clean grass and plant residue off the cutting attachment mounting at regular
intervals remove any accumulated material from the cut- ting attachment and
deflector.
To reduce the risk of injury, shut off the engine before replacing the cutting
attachment.
The gearbox gets hot during opera- tion. Never touch the gearbox risk of
burns!
6
0458-432-8321-B
2 Safety Precautions and Working Techniques
If a rotating cutting attachment touches a rock or another hard object, sparks
can occur which may possibly ignite combustible materials. Also driedout
plants and brushwood are combustible, above all in hot and dry weather. If
there is a risk of fire, do not use cutting attachments in the vicinity of
combustible materials, dried-out plants or brushwood. It is mandatory that you
ask the responsible forestry office about any current fire hazards.
2.8 Using mowing heads
Extend the cutting attachment deflector with the attached parts specified in
the User Manual.
Only use a deflector with a properly fitted blade, which limits the mowing
line to the permissible length.
For manually adjustable mowing heads, always switch off the engine before
adjusting the mow- ing line risk of injury!
Misuse with mowing lines that are too long reduces the working speed of the
engine. The constant slipping of the clutch causes overheat- ing and damage to
important components (e. g. clutch, plastic housing parts) e. g. due to the
cutting attachment rotating during idling risk of injury!
2.9 When using metal cutting attachments
STIHL recommends the use of original STIHL metal cutting attachments. These
have been optimized for the machine and the user’s require- ments.
Metal cutting attachments rotate very fast, gener- ating forces acting on the
attachments and on the cuttings.
Metal cutting attachments must be sharpened in regular intervals in accordance
with the instruc- tions.
Unevenly sharpened metal cutting attachments generate an imbalance which may
cause extreme loads on the machine risk of break- age!
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.
After each contact of the metal cutting attach- ment with hard objects (e.g.
stones, rocks, metal parts), check it for damage (e.g. tears and defor-
0458-432-8321-B
English
mation). To reduce the risk of injury, remove burrs and other visible
accumulated material because they may become detached and be ejected at high
speed during operation.
Do not continue using or attempt to repair dam- aged or cracked cutting
attachments by means of welding, straightening or modifying the shape
(unbalanced).
Particles or pieces may come off and hit the operator or a bystander at a high
speed risk of most severe injuries!
To reduce the above-named risks involved in operating a metal cutting
attachment, ensure that the diameter of your metal cutting attachment is not
too big. Also, the attachment must not be too heavy. It must be made of high-
quality materials and have a suitable geometry (shape, thickness).
A metal cutting attachment not made by STIHL must not have a different weight,
thickness, shape or a larger diameter than the largest STIHL metal cutting
attachment approved for this metal cutting attachment risk of injury!
2.10 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 cir-
culation (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.
2.11 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 per- formed by a
servicing dealer.
7
English
STIHL recommends that you have servicing and repair work carried out
exclusively by an author- ized 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 original STIHL replacement parts. They are
specifically designed to match your model and meet your performance
requirements.
To reduce the risk of injury from unintentional engine startup, always shut
off the engine and disconnect the spark plug boot before performing any
repairs, maintenance or cleaning work. Exception: Carburetor and idle speed
adjust- ments.
Do not turn the engine over on the starter with the spark plug boot or spark
plug removed 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 inter- vals.
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 con- dition, 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.
2.12 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.
2 Safety Precautions and Working Techniques Deflector may be used with mowing
heads.
Deflector must not be used with mow- ing heads.
Deflector may be used with grass cut- ting blades.
Deflector must not be used with grass cutting blades.
Deflector may be used with brush kni- ves.
Deflector must not be used with brush knives.
Deflector must not be used with shredder blades. Deflector must not be used
with circu- lar saw blades.
2.13 Shoulder Strap/Harness
The shoulder strap/harness is included with the machine or available as a
special accessory.
Use the shoulder strap/harness. With the engine running, attach the machine to
the shoulder strap/harness. 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 quickrelease system.
0000-GXX-0498-A0
8
0458-432-8321-B
2 Safety Precautions and Working Techniques
2.14 Mowing Head with Nylon Line
English
000BA015 KN
002BA049 KN
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 leaf- let. 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.
2.15 STIHL Polycut Mowing Head with Polymer Blades
For mowing unobstructed edges of meadows (without posts, fences, trees or
similar obsta- cles).
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 instruc- tions 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.
2.16 Risk of Kickout (Blade Thrust) with Metal Cutting Attachments
WARNING
When using metal cutting attach- ments 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.
002BA135 KN
0458-432-8321-B
9
English
The risk of kickout is greatest when the black area of the rotating cutting
attachment comes into contact with a solid object.
2.17 Grass Cutting Blade
2 Safety Precautions and Working Techniques
Use the brushcutter like a scythe (sweep it to the right and left) at ground level when cutting grass and thinning young stands.
002BA355 KN
002BA509 KN
000BA020 KN
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.
2.18 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.
To cut wild growth and scrub, lower the brush knife down onto the growth to
achieve a shred- ding 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 attach- ment 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
diame-
ter of more than 2 cm use a circular saw blade for such work. Inspect the
brush knife at regular short inter- vals 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).
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0458-432-8321-B
2 Safety Precautions and Working Techniques
2.19 Circular Saw Blade
Suitable for cutting shrubs and trees with a maxi- mum 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 con- tact 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.
2.19.1 Risk of kickout
English
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-sha- ded area of the circular saw blade.
Always start the cut with this area of the blade.
002BA068 KN
0458-432-8321-B
11
English
3 Approved Combinations of Cutting Attachment, Deflector, Handle an…
3 Approved Combinations of Cutting Attachment, Deflector, Han- dle and Harness
Cutting attachment
Deflector, limit stop Handle
Carrying strap
1
2
17
3
4
22 26 28
23
24
5
6
19
7
8
18
25
27 28
9
10
11
12
20
13
14
15
23 25
24 27 28
0000084358_004
16
21
25
29
3.1 Permissible combinations
Choose the correct combination from the table depending on the cutting tool!
WARNING
For safety reasons only the cutting attachments, deflector, handle and harness
versions within one line of the table may be combined with one another. No
other combinations are permitted because of the risk of accidents!
3.2 Cutting attachments
3.2.1 Mowing heads 1 STIHL SuperCut 202 2 STIHL AutoCut C 26-2 3 STIHL AutoCut
25-2/AutoCut 27-2
12
4 STIHL AutoCut 30-2 5 STIHL AutoCut 36-2 6 STIHL FixCut 31-2 7 STIHL DuroCut
20-2 8 STIHL PolyCut 20-3 9 STIHL PolyCut 28-2 10 STIHL TrimCut 32-2
3.2.2 Metal cutting tools
11 Grass cutting blade 230-2 (230 mm dia.)
12 Grass cutting blade 260-2 (260 mm dia.)
13 Grass cutting blade 230-4 (230 mm dia.)
14 Grass cutting blade 230-8
0458-432-8321-B
4 Approved Power Tool Attachments
(230 mm dia.) 15 Brush knife, 250-3
(250 mm dia.) 16 Circular saw blade 200-22 chisel tooth
(4112), circular saw blade 200-22 HP chisel tooth (4001)
WARNING
Grass cutting blades, brush knives and circular saw blades of other, non-metal materials must not be used.
3.3 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 cut-
ting attachments, items 9 to 13 21 Limit stop for circular saw blades
3.4 Handles
22 Loop handle 23 Loop handle with 24 Barrier bar 25 Bike handle
3.5 Shoulder straps
26 Shoulder strap can be used 27 Shoulder strap must be used 28 Full harness
can be used 29 Full harness must be used
4 Approved Power Tool
Attachments
The following STIHL attachments may be used with the basic power tool:
Attachment BF HL 145° 1) HT 1)
Application Cultivator Long reach hedge trim- mer Pole pruner
English
Attachment RG 3) SP 1) 2)
Application Weeder Special harvester
5 Mounting the Bike Handle
5.1 Mounting Bike Handle with Swiveling Handle Support
The machine is supplied with the swiveling han- dle support already mounted on the shaft. To mount the handlebar it is necessary to remove the clamp moldings.
5.1.1 Removing the Clamp Moldings
Hold the lower clamp (1) and upper clamp (2) firmly together.
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).
Pull out the wing screw the washer (6) remains on the wing screw.
Separate the clamp moldings the springs (4 and 5) remain in the lower clamp.
-
Not approved for bike-handled machines
-
Use handle hose supplied with the machine
-
Use barrier bar on loop-handled machines
0458-432-8321-B
13
English 5.1.2 Securing the Handlebar
A 7
5.1.3
5 Mounting the Bike Handle Mounting the Control Handle
12
250BA046 KN
1
Place the handlebar (7) in the lower clamp (1) so that distance A is no more
than 15 cm (6 in).
Place the upper clamp in position and hold both clamp moldings together.
Push the wing screw through the two clamps as far as stop hold all parts
together and secure them.
11 9 10
13
7 13
Take out the screw (9) the nut (10) remains in the control handle (11).
Push the control handle onto the handlebar (7) until the holes (13) line up
the throttle trig- ger (12) must point towards the gearbox.
Insert the screw (9) and tighten it down firmly.
8
0000-GXX-0511-A0
0000-GXX-0510-A0
Place the secured assembly on the handle support (8) with the wing screw at
the side nearest the engine.
Push the wing screw into the handle support as far as stop and then screw it
down but do not finally tighten yet.
Line up the handlebar at a right angle to the drive tube check distance A
again.
Tighten down the wing screw firmly.
14
0458-432-8321-B
5 Mounting the Bike Handle 5.1.4 Fitting the Throttle Cable
NOTICE
Do not kink the throttle cable or lay it in tight radii make sure the
throttle trigger moves freely.
5.1.6 Swiveling the Handlebar Transport position
90° 3
15 14
English
0000-GXX-0512-A1 0000-GXX-0513-A1
14
7
15
15
Position the clamp (15) and handle sup- port (14) against the drive tube.
Close the throttle cable retainer (15). The retainer (15) snaps into place.
5.1.5 Adjusting the Throttle Cable Check adjustment of throttle cable see
chap-
ter on “Adjusting the Throttle Cable”.
Loosen the wing screw (3) and unscrew it until the handlebar (7) can be
rotated.
Rotate the handlebar 90° counterclockwise and then swing the handles down.
Tighten down the wing screw (3) firmly.
Working position Reverse the sequence described above to
swing the handles up and turn the handlebar clockwise.
0458-432-8321-B
15
English
6 Mounting the Loop Handle
6.1 Mounting Loop Handle with Barrier Bar
2
6 Mounting the Loop Handle
Position the clamp (6) against the drive tube. Place the barrier bar (2) in
position as shown. Line up the holes. Insert the screws (7) in the holes and
screw
them into the barrier bar (2) as far as stop. Go to “Securing the Loop
Handle”.
6.2 Mounting the Loop Handle without Barrier Bar
7
7
8
84
002BA614 KN
1 1
Fit the square nuts (1) in the barrier bar (2); the holes must line up.
4
2
3
002BA098 KN
3
5
6 1
1
Place the clamp (3) in the loop handle (4) and position them both against the
drive tube (5).
Position the clamp (6) against the drive tube. Line up the holes. 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. Go to “Securing the Loop Handle”.
5
6 7
Place the clamp (3) in the loop handle (4) and position them both against the
drive tube (5).
16
002BA099 KN
0458-432-8321-B
7 Adjusting the Throttle Cable
6.3 Securing the Loop Handle
English
002BA655 KN
A
4 9
Set the throttle trigger to the full throttle posi- tion.
Carefully rotate the screw in the throttle trigger in the direction of the
arrow until you feel initial resistance. Then rotate it another half turn in
the same direction.
8 Fitting the Carrying Ring
8.1 Polymer Version
002BA615 KN
The loop handle can be adjusted to suit the height and reach of the operator
and the applica- tion by changing distance (A).
Recommendation: distance (A): about 20 cm (8 in) Slide the handle to the
required position. Line up the loop handle (4). 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 neces- sary.
The sleeve (9) (not fitted on all models) must be between the loop handle and
the control handle.
7 Adjusting the Throttle Cable
It may be necessary to correct the adjustment of the throttle cable after
assembling the machine or after a prolonged period of operation.
Adjust the throttle cable only when the unit is completely and properly
assembled.
1
For position of carrying ring see “Main Parts”. Push the carrying ring (1)
over the drive tube. Insert the M5 nut in the hex recess in the car-
rying ring. Fit the M5x14 screw. Line up the carrying ring. Tighten down the
screw firmly.
002BA529 KN
0458-432-8321-B
17
002BA637 KN
English
9 Mounting the deflector
9.1 Mounting the Deflector
1
3
2
9 Mounting the deflector
9.2 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.
9.3 Fitting the Skirt
3
1 Deflector for mowing attachments 2 Deflector for mowing heads
Deflectors (1 and 2) are both mounted to the gearbox in the same way. Place
the deflector on the gearbox flange. Insert the screws (3) and tighten them
down
firmly.
002BA636 KN
Slide the lower guide slot of the skirt onto the deflector it must snap into
position.
9.4 Removing the Skirt
Insert the stop pin into the hole in the skirt and use it to push the skirt to
the left.
Pull the skirt off the deflector.
9.5 Mounting the Blade
002BA646 KN
002BA638 KN
Slide the line limiting blade into the guide on the skirt.
Insert the screw and tighten it down firmly.
18
0458-432-8321-B
10 Mounting the Cutting Attachment
9.6 Mounting the Limit Stop
7 6
English
3
002BA639 KN
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.
Position the limit stop (6) on the gearbox flange.
Insert the screws (7) and tighten them down firmly.
10 Mounting the Cutting Attachment
10.1 Placing power tool on the ground
2
1
Depending on the cutting attachment, it may be necessary to use the nut (3)
and rider plate (2). The thrust plate (1) must be used with all cutting
attachments. These parts are included in a kit supplied with the machine and
are also available as special accessories. 10.2.2 Machine supplied without
mounting
hardware
0000-GXX0500-A0
002BA104 KN
002BA266 KN
Shut off the engine. Lay your power tool on its back so that the cut-
ting attachment mounting face is pointing up.
10.2 Mounting Hardware for Cutting Attachments
The mounting hardware supplied depends on the cutting attachment that comes as
original equip- ment with the new machine.
10.2.1 Machine supplied with mounting hard- ware
Mowing heads and metal cutting attachments may be mounted.
2
Only mowing heads may be used which mount directly to the shaft (2).
0458-432-8321-B
19
English
10.3 Blocking the Shaft
2
7
6
6
The output shaft (2) must be blocked with the stop pin (6) or screwdriver (6)
to mount or remove cutting attachments. These parts come standard with the
machine or are available as special accessories. Insert the stop pin (6) or
screwdriver (6) in the
hole (7) in the gearbox as far as stop and apply slight pressure. Rotate
shaft, nut or cutting attachment until the stop pin slips into position and
blocks the shaft.
10.4 Removing the Mounting Hard- ware
002BA330 KN
10 Mounting the Cutting Attachment Take the rider plate (4) off the shaft (5).
Do not
remove the thrust plate (6).
10.5 Mounting the Cutting Attach- ment
WARNING Risk of injury from thrown objects and contact with the cutting
attachment. Use a deflector that matches the cutting attachment see
“Mounting the Deflector”.
10.6 Fitting Mowing Head with Screw Mounting
Keep the instruction leaflet for the mowing head in a safe place.
3
4
2
1
0000-GXX-1323-A0 0000-GXX-1324-A0
3 4
5 6
1
Block the shaft (5) with the stop pin (1). Use the combination wrench (2) to
loosen and
remove the nut (3) clockwise (left-hand thread).
20
2
Fit the thrust plate (1). Screw the mowing head (3) counterclockwise
on to the shaft (4) as far as stop. Block the shaft (4) with the stop pin (2).
Tighten down the mowing head (3) firmly.
NOTICE
Remove the tool used to block the shaft.
10.7 Remove the mowing head.
Block the shaft (4) with the stop pin (2). Unscrew and remove the mowing head
(3)
clockwise.
0458-432-8321-B
10 Mounting the Cutting Attachment
10.8 Fitting Mowing Head without Screw Mounting
Keep the instruction leaflet for the mowing head in a safe place.
10.8.1 STIHL FixCut 31-2
English
Use the combination wrench to loosen and unscrew the mounting nut
counterclockwise from the output shaft.
10.10 Mounting Metal Cutting Attach- ments
Keep the leaflet and packaging of the metal cut- ting 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
681BA303 KN
1
3
2
Fit the thrust plate (2). Place the mowing head on the thrust plate (2).
WARNING
Collar (see arrows) must engage the mowing head’s mounting hole. Push the
thrust washer (3) (convex side up)
over the shaft (1) until it is seated on the base. Block the shaft. 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.
10.9 Removing the Mowing Head
Block the shaft.
4
6
5
7
8
Cutting attachments 2, 4, 5 and 6 may be moun- ted either way round they
must be turned over regularly to help avoid one-sided wear.
The cutting edges of cutting attachments 1, 3, 7 and 8 must point clockwise.
Direction of rotation is indicated by an arrow on the inside of the deflector.
0458-432-8321-B
21
English
14
13 10
11
8
9
12
Fit the thrust plate (9). Place the cutting attachment (8) on the thrust
plate (9). Collar (see arrow) must engage the cutting attachment’s mounting
hole.
Securing the cutting attachment Fit the rider plate (10). Block the shaft (11)
with the stop pin (12). Use the combination wrench (14) to screw the
mounting nut (13) on to the output shaft coun- terclockwise and tighten it
down firmly.
WARNING
There is a risk of injury if the cutting attachment works loose. If the
mounting nut has become too loose, fit a new one.
NOTICE
Remove the tool used to block the shaft.
10.11 Removing the Metal Cutting Attachment
WARNING
Wear protective gloves to reduce the risk of direct contact with the sharp
cutting edges. Block the shaft (11) with the stop pin (12). Unscrew the
mounting nut (13) clockwise.
22
0000-GXX-0502-A0
Fuel
Remove cutting attachment and its mounting hardware from the gearbox but do
not remove the thrust plate (9).
11 Fuel
The engine requires a mixture of gasoline and engine oil.
WARNING
Avoid direct skin contact with fuel and breathing in of gasoline fumes.
11.1 STIHL MotoMix
STIHL recommends using STIHL MotoMix. This pre-blended fuel is free of benzene
and lead, is distinguished by a high octane rating, and always provides the
proper mixing ratio.
STIHL MotoMix uses STIHL HP Ultra two-stroke engine oil for optimum engine
life.
MotoMix is not available in all markets.
11.2 Mixing fuel
NOTICE
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 low-quality gasoline or engine oil is used.
11.2.1 Gasoline
Use only high-quality gasoline with an octane rat- ing of at least 90 ROC
leaded or unleaded.
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 per- formance using gasoline with an
alcohol compo- nent of up to 27% (E27).
11.2.2 Engine oil
If you mix the fuel yourself, use only STIHL twostroke engine oil or another
high-performance engine oil classified as JASO FB, JASO FC, JASO FD,
ISO-L-EGB, ISO-L-EGC or ISO-LEGD.
STIHL specifies STIHL HP Ultra two-stroke engine oil or an equivalent high-
performance engine oil in order to maintain emission limits over the machine’s
service life.
0458-432-8321-B
0000-GXX-0476-A0
Fueling
11.2.3 Mixing ratio
with STIHL two-stroke engine oil 1:50; 1:50 = 1 part oil + 50 parts gasoline
11.2.4 Examples
Quantity of gaso- STIHL two-stroke
line
engine oil 1:50
Liters
Liters
(ml)
1
0.02
(20)
5
0.10
(100)
10
0.20
(200)
15
0.30
(300)
20
0.40
(400)
25
0.50
(500)
Pour oil into an approved safety fuel canister first, then add gasoline and mix thoroughly
11.3 Storing fuel mixture
Store in approved safety fuel canisters only in a dry, cool and secure place
protected against light and sunlight.
Fuel mixture deteriorates with age mix only as much as needed for a few
weeks. Do not store fuel mixture for longer than 30 days. The fuel mixture can
become unusable more quickly if exposed to light, sunlight or low or high
tempera- tures.
STIHL MotoMix however can be stored for up to 5 years without any problems.
Shake the canister containing the fuel mixture
thoroughly before refueling
WARNING
Pressure may have built up in the canister open it carefully.
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 regula- tions and without harming the environment!
12 Fueling
12.1 Preparations
English
Before fueling, clean the filler cap and the area around it to ensure that no
dirt falls into the tank.
Position the machine so that the tank cap faces up.
12.2 Opening the Tank Cap
Turn the cap counterclockwise until it can be removed from the tank opening.
Remove the tank cap.
12.3 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 noz- zle for fuel (special
accessory). Fill up with fuel.
12.4 Closing the Tank Cap
002BA447 KN
002BA448 KN
0458-432-8321-B
Place the cap in the opening. 23
0000-GXX-0503-A0 0000-GXX-0504-A0
English
Turn the cap clockwise as far as stop and tighten it down as firmly as
possible by hand.
13 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”.
13.1 Shoulder Strap
13.2
13 Fitting the Harness
Full Harness
1 3
1 2
Put on the harness (1) and close the locking
plate (3).
2
Adjust the length of the strap with the machine attached, the carabiner (2) must be
about a hand’s width below your right hip.
Balance the machine see “Balancing the
Machine”.
Put on the shoulder strap (1). Adjust the length of the strap so that the
cara-
biner (2) is about a hand’s width below your right hip. Balance the machine
see “Balancing the Machine”.
24
0458-432-8321-B
002BA662 KN
14 Balancing the Machine
14 Balancing the Machine
14.1 Attaching Machine to Harness
2 1
English
1
2
1
2
2
The type and style of the shoulder strap and car- abiner depend on the market.
Attach the carabiner (1) to the carrying ring (2)
on the drive tube.
14.2 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:
002BA660 KN
1
Loosen the screw (1). Slide the carrying ring (2) along the drive tube.
Tighten the screw (1) moderately. Allow the unit to hang freely. Check the
position obtained: Balanced positions
A
Mowing tools (A) such as mowing heads, grass cutting blades and brush knives should just touch the ground.
002BA034 KN
0458-432-8321-B
25
English
15 Starting / Stopping the Engine
15 Starting / Stopping the Engine
15.1 Controls
15.1.1 Version with Bike Handle
002BA035 KN
B
Circular saw blades (B) should “hover” about 20 cm (8 in) above the
ground.
When the correct balanced position has been
reached:
Tighten down the screw (1) on the carrying
ring firmly.
14.3 Disconnecting Machine from
2
Harness
3 1
0000-GXX-0494-A0
1 2
1 2
1 2
1 Throttle trigger lockout 2 Throttle trigger 3 Stop switch with Run and Stop
positions.
Depress the stop switch (…) to switch off the ignition see “Function of stop
switch and ignition system”.
15.1.2 Version with Loop Handle
3
1
002BA661 KN
Press down the bar on the carabiner (1) and
pull the carrying ring (2) out of the carabiner.
2
1 Throttle trigger lockout
2 Throttle trigger
3 Stop switch with Run and Stop positions. Depress the stop switch (…) to
switch off the
26
0458-432-8321-B
0000-GXX-0477-A0
15 Starting / Stopping the Engine
ignition see “Function of stop switch and ignition system”.
15.1.3 Function of stop switch and ignition system
The ignition is switched off and the engine stop- ped when the stop switch is
pressed. The stop switch returns automatically to the Run position when it is
released: The ignition is switched on again after the engine stops the
engine is then ready to start.
15.2 Starting the Engine
15.2.1 Cranking
English
0000-GXX-0479-A0
0000-GXX-0480-A0
Press the manual fuel pump bulb (9) at least five times even if the bulb is
already filled with fuel.
Press in the choke knob (8) and turn it to the position that suits the engine
temperature:
g if the engine is cold < for warm start also use this position if the
engine has been running but is still cold.
The choke knob must engage in position.
0000-GXX-0478-A0
Place the unit on the ground: It must rest securely on the engine support and
the deflec- tor.
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. Make sure you have a firm footing,
either
standing, stooping or kneeling. Hold the unit firmly on the ground with your
left
hand and press down do not touch the throt- tle trigger or lockout lever
your thumb should be under the fan housing.
NOTICE
Do not stand or kneel on the drive tube.
0458-432-8321-B
Hold the starter grip with your right hand. 27
0000-GXX-0481-A0
English 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. Do not let the starter
grip snap back. Guide it slowly back into the housing so that the starter rope
can rewind properly. Continue cranking until the engine runs. 15.2.2 As soon
as the engine runs
Press down the throttle trigger lockout and open the throttle the choke knob
moves to the run position F. After a cold start, warm up the engine by opening
the throttle several times. WARNING
There is a risk of injury if the cutting attachment runs when the engine is
idling. Adjust the carbu- retor so that the cutting attachment does not run
when the engine is idling see “Adjusting the Carburetor”. Your machine is
now ready for operation.
15.3 Stopping the Engine
Depress the momentary contact stop switch the engine stops release the
stop switch it springs back to the run position.
28
002BA664 KN 681BA268 KN
16 Transporting the Unit
15.4 Other Hints on Starting
Engine stalls in cold start position g or under acceleration. Move the choke
knob to < and continue
cranking until the engine runs. Engine does not start in warm start position <
Move the choke knob to g and continue
cranking until the engine runs. If the engine does not start Check that all
settings are correct. Check that there is fuel in the tank and refuel if
necessary. Check that the spark plug boot is properly con-
nected. Repeat the starting procedure. Engine is flooded Move the choke knob
to F and continue crank-
ing until the engine runs. Fuel tank run until completely dry After refueling,
press the manual fuel pump
bulb at least five times even if the bulb is already filled with fuel. Set
the choke lever to suit the engine temper- ature. Now start the engine.
16 Transporting the Unit
16.1 Using Transport Guard
The type of transport guard depends on the metal cutting attachment supplied
with the machine. Transport guards are available as spe- cial accessories.
16.2 230 mm Grass Cutting Blades
0458-432-8321-B
16 Transporting the Unit
English
681BA269 KN
681BA269 KN
681BA271 KN
681BA270 KN
681BA272 KN
681BA272 KN
681BA301 KN
16.3 250 mm Brush Knives
16.4 Grass Cutting Blades up to 260 mm
681BA268 KN
0458-432-8321-B
29
681BA302 KN
English
2.
16.5
16 Transporting the Unit
Circular Saw Blades
681BA275 KN
-
Disconnect wire rod from the transport guard. Swing wire rod outwards.
-
Disconnect wire rod from the transport guard.
681BA275 KN
681BA305 KN
681BA276 KN
Fit the transport guard on the cutting attach- ment from below.
681BA311 KN
- Swing wire rod into position. Hook wire rod to the transport guard.
30
Swing wire rod outwards. Fit transport guard on saw blade from below,
making sure the limit stop is properly seated in the recess.
0458-432-8321-B
681BA277 KN 0000-GXX-0482-A0
17 Operating Instructions
18.1
English
If there is a noticeable loss of engine power
43
2
1
Swing wire rod into position. Hook wire rod to the transport guard.
17 Operating Instructions
17.1 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 dur- ing
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.
17.2 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 engine-mounted components (ignition, carburetor)
from thermal overload.
17.3 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 outof-service periods see “Storing the
Machine”.
18 Replacing the Air Filter
Filters have an average life of more than a year. Do not remove the filter
cover or replace the air filter as long as there is no noticeable loss of
power.
1
Turn the choke knob to g. Loosen the screws (1). Remove the filter cover (2).
Clean away loose dirt from around the filter. Remove the filter element (3).
Replace dirty or damaged filter element (3). Replace any damaged parts.
18.2 Installing the Filter Element
Install the filter element (3) in the filter housing and fit the cover.
Insert the screws (1) and tighten them down firmly.
19 Adjusting the Carburetor
The carburetor has been set at the factory to pro- vide an optimum fuel-air
mixture under most operating conditions.
19.1 Adjusting Idle Speed
Engine stops while idling Warm up the engine for about 3 minutes. Turn the
idle speed screw (LA) slowly clock-
wise until the engine runs smoothly the cut- ting attachment must not run.
0000-GXX-0495-A0
0458-432-8321-B
31
0000-GXX 0537-A0
English
Cutting attachment runs when engine is idling Turn the idle speed screw (LA)
slowly counter-
clockwise until the cutting attachment stops running and then turn the screw
about another 1/2 to 3/4 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.
20 Spark Arresting Screen in Muffler
WARNING
To reduce the risk of fire caused by hot particles escaping from the machine,
never operate the machine without a spark arresting screen, or with the spark
arresting screen damaged. Do not modify the muffler or spark arresting screen.
NOTICE
According to the law or regulations in some countries or federal states,
certain operations may only be carried out if a properly serviced spark
arresting screen is provided. If the engine is down on power, check the
spark arresting screen in the muffler. Wait for the muffler to cool down
20 Spark Arresting Screen in Muffler
21 Spark Plug
If the engine is down on power, difficult to start or runs poorly at idle
speed, first check the spark plug.
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 “Specifica- tions”.
21.1 Removing the Spark Plug
1
2
3
Remove the cover (1). Pull off the spark plug boot (2). Unscrew the spark plug
(3).
21.2 Checking the Spark Plug
000BA039 KN
4
5
Undo screw (4) Lift the spark arresting screen (5) and pull it
out. Clean the spark arresting screen (5). If the
screen is damaged or heavily carbonized, install a new one. Refit the spark
arresting screen (5) Insert and tighten screw (4)
0000-GXX-0486-A0
A
Clean dirty spark plug. Check electrode gap (A) and readjust if neces-
sary see “Specifications”. Rectify the problems which have caused foul-
ing of the spark plug.
Possible causes are: Too much oil in fuel mix. Dirty air filter.
Unfavorable running conditions.
32
0458-432-8321-B
22 Engine Running Behavior
1
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 inju- ries or damage to property.
Use resistor type spark plugs with a properly
tightened adapter nut.
21.3 Installing the Spark Plug
Screw the spark plug (3) into the cylinder. Tighten down the spark plug (3)
with the com-
bination wrench. Press the boot (2) firmly onto the spark plug. Fit the cover
(1) and screw it down firmly.
22 Engine Running Behavior
If engine running behavior is unsatisfactory even though the air filter is
clean and the carburetor is properly adjusted, the cause may be the muffler.
Have the muffler checked for contamination (car- bonization) by your servicing
dealer. STIHL recommends that you have servicing and repair work carried out
exclusively by an author- ized STIHL servicing dealer.
23 Lubricating the Gearbox
1
000BA045 KN
English
Remove the screw plug (1). 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. Squeeze no more than 5 g (1/5 oz) grease into the
gearbox.
NOTICE
Do not completely fill the gearbox with grease.
Unscrew the tube (2). Insert the screw plug (1) and tighten it down
firmly.
24 Storing the Machine
If out of use for periods of about 30 days or lon- ger Drain and clean the
fuel tank in a well-ventila-
ted area. Dispose of fuel properly in accordance with
local environmental requirements. If a manual fuel pump is fitted: Press the
man-
ual fuel pump at least 5 times. Start the engine and run it at idling speed
until
it stops Remove, clean and inspect the cutting attach-
ment. Treat metal cutting attachments with protective oil. Thoroughly clean
the machine Cleaning the Air Filter Store the machine in a dry and safe place,
out of the reach of children and other unauthor- ized users
25 Sharpening Metal Cutting Blades
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.
Sharpen frequently, take away as little metal as possible two or three
strokes of the file are usually enough.
0000-GXX-0536-A0
Check grease level after every 25 hours of oper- ation and re-lubricate if necessary.
0458-432-8321-B
33
English
1
1
1
2
2
2
1
1
2
2
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.
25.1 Balancing
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 re-balanced as nec- essary STIHL recommends a STIHL servic- ing dealer.
26 Maintaining the Mowing Head
26.1 Placing power tool on the ground
002BA665 KN
26 Maintaining the Mowing Head
Shut off the engine. Lay your power tool on its back so that the cut-
ting attachment mounting face is pointing up.
26.2 Replacing Nylon Line
Always check the mowing head for signs of wear before replacing the nylon
line.
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. If
necessary, remove the mowing head.
26.3 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 With the engine running, hold the rotating
mowing head above the grass surface. 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.
26.4 Replacing Nylon Line
STIHL PolyCut
Precut lengths of nylon line can be fitted to the PolyCut in place of the
cutting blades.
002BA104 KN
34
0458-432-8321-B
27 Maintenance and Care
English
STIHL DuroCut, STIHL FixCut 31-2, STIHL Poly- Cut
WARNING
To reduce the risk of injury, always shut off the engine before refilling the
mowing head. Fit precut lengths of nylon line in the mowing
head as described in the instructions supplied.
26.5 Replacing Cutting Blades
26.5.1 STIHL PolyCut Always check the mowing head for signs of wear before
installing new cutting blades.
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.
Remove the mowing head. Replace blades as shown in the illustrated
instructions. Mount the mowing head on the machine.
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.
27 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 accord- ingly.
before starting work after finishing work or daily
after each refueling stop weekly monthly
every 12 months if problem
if damaged as required
Complete machine
Visual inspection (condi- X
X
tion, leaks)
Clean
X
Replace any damaged X parts
Control handle
Check operation
X
X
Air filter
Visual inspection
Replace2)
Manual fuel pump (if fit- ted)
Check
X
Have repaired by servic- ing dealer1)
Pickup body (filter) in fuel Have checked by servic-
tank
ing dealer1)
Have replaced by serv- icing dealer1)
Fuel tank
Clean
X
X
X
X
X
X
X
XX
X
X
0458-432-8321-B
35
before starting work after finishing work or daily
after each refueling stop weekly monthly
every 12 months if problem
if damaged as required
English 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 accord- ingly.
27 Maintenance and Care
Carburetor
Check idle adjustment X
X
the cutting attachment
must not rotate
Adjust idle speed
Spark plug
Adjust electrode gap
Replace after every 100 operating hours
Cooling inlets
Visual inspection
X
Clean
Cylinder fins
Have cleaned by servic- ing dealer1)
Valve clearance
If power is low or crank- ing effort very high, have valve clearance checked and, if necessary, adjus- ted by servicing dealer1)
Spark arresting screen in Check
X
muffler
Clean or replace
Combustion chamber
Have cleaned after every 150 hours of oper- ation by servicing dealer1)
All accessible screws and Re-tighten nuts (not adjusting screws)
Anti-vibration elements Check
X
(rubber buffers, springs) Have replaced by serv-
icing dealer1)
Cutting attachment
Visual inspection
X
X
Replace
Check tightness
X
X
Metal cutting attachment Sharpen
X
Gearbox lubrication
Check
X
Replenish
Safety labels
Replace
1)STIHL recommends an authorized STIHL servicing dealer. 2)Only if there is a noticeable loss of engine power
X X
X X
X
X XX X
X
X
X
X
X
X
X X
36
0458-432-8321-B
28 Minimize Wear and Avoid Damage
28 Minimize Wear and Avoid Damage
Observing the instructions in this manual helps reduce the risk of unnecessary
wear and dam- age 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, oper- ating and maintenance instructions in this man- ual. 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.
28.1 Maintenance Work
All the operations described in the “Maintenance Chart” must be performed on a
regular basis. If these maintenance operations cannot be per- formed 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 author- ized 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 defi-
cient maintenance (e.g. air and fuel filters), incorrect carburetor adjustment
or inadequate cleaning of cooling air inlets (intake ports, cyl- inder fins).
Corrosion and other consequential damage resulting from improper storage.
Damage to the machine resulting from the use of poor quality replacement
parts.
English
28.2 Parts Subject to Wear and Tear
Some parts of the power tool are subject to nor- mal 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
29 Main Parts
9 8
10
45
23
1
6
11
21
13
7
14 15
14
16 17
12
18
19 21 20
15 9 10 8
1 Tank cap 2 Carburetor adjusting screw 3 Starter grip 4 Manual fuel pump 5 Cover 6 Muffler with spark arresting screen 7 Machine support 8 Throttle trigger 9 Stop switch 10 Throttle trigger lockout 11 Bike handle (handlebar) 12 Handle support 13 Wing screw 14 Throttle cable retainer
0000-GXX-0514-A0
0458-432-8321-B
37
English
15 Carrying ring 16 Choke lever 17 Air filter cover 18 Fuel tank 19 Loop
handle 20 Barrier bar (country specific) 21 Drive tube # Serial number
1
3
2
1
5
2
1
7 8
5 1 9
4
6 4
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
30 Specifications
30.1 Engine
STIHL single cylinder four-stroke engine with mixture lubrication
Displacement: Cylinder bore:
36.3cm3 43 mm
38
002BA644 KN
30 Specifications
Piston stroke:
25 mm
Engine power to ISO 8893: 1.4 kW (1.9 hp) at
8500 1/min
Idle speed:
2800 rpm
Cut-off speed (nominal 9500 rpm
value):
Max. output shaft speed 7150 rpm
(cutting attachment):
Valve clearance
Inlet valve:
0.10 mm
Exhaust valve:
0.10 mm
30.2 Ignition system
Electronic magneto ignition
Spark plug (suppressed): NGK CMR 6 H,
STIHL ZK C 10,
BOSCH USR 4AC
Electrode gap:
0.5 mm
30.3 Fuel system
All-position diaphragm carburetor with integral fuel pump
Fuel tank capacity:
710 cm3 (0.71 l)
30.4 Weight
Dry, without cutting attachment and deflector
FS 131:
5.8 kg
FS 131 R:
5.5 kg
30.5 Overall length
without cutting attachment: 1800 mm
30.6 Equipment features
R Loop handle
30.7 Sound and vibration levels
For further details on compliance with Vibration Directive 2002/44/EC, see
www.stihl.com/vib
30.7.1 Cutting attachment
The idle and nominal maximum speed operating states are given equal consideration when calcu- lating sound and vibration levels.
Sound pressure level Lpeq in accordance with ISO 22868
with mowing head FS 131 with bike handle: FS 131 R: with metal mowing tool FS 131 with bike handle: FS 131 R with barrier bar:
98 dB(A) 98 dB(A) 97 dB(A) 97 dB(A)
0458-432-8321-B
31 Maintenance and Repairs
Sound power level Lw in accordance with ISO 22868
with mowing head FS 131 with bike handle: FS 131 R: with metal mowing tool FS 131 with bike handle: FS 131 R with barrier bar:
109 dB(A) 109 dB(A) 109 dB(A) 109 dB(A)
Vibration level ahv,eq in accordance with ISO 22867
with mowing head Handle, left Handle,
right
FS 131 with bike han- 4.9 m/s2 4.9 m/s2
dle:
FS 131 R:
6.2 m/s2 6.2 m/s2
with metal mowing tool Handle, left Handle, right
FS 131 with bike han- 3.7 m/s2 3.4 m/s2 dle: FS 131 R with barrier 5.1 m/s2
5.1 m/s2 bar:
30.8 Interchangeable attachments
The noise and vibration data of the approved tool attachments are listed in the user manual sup- plied with each attachment.
The Kfactor in accordance with Directive 2006/42/EC is 2.0 dB(A) for the sound pressure level and sound power level; the Kfactor in accordance with Directive 2006/42/EC is 2.0 m/s2 for the vibration level.
30.9 REACH
REACH is an EC regulation and stands for the Registration, Evaluation, Authorization and Restriction of Chemical substances.
For information on compliance with the REACH regulation (EC) No. 1907/2006 see
www.stihl.com/reach
31 Maintenance and Repairs
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.
STIHL recommends that you have servicing and repair work carried out
exclusively by an author- ized STIHL servicing dealer. STIHL dealers are
regularly given the opportunity to attend training courses and are supplied
with the necessary technical information.
English
When repairing the machine, only use replace- ment parts which have been
approved by STIHL for this power tool or are technically identical. Only use
high-quality 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).
32 Disposal
Contact the local authorities or your STIHL serv- icing dealer for information
on disposal.
Improper disposal can be harmful to health and pollute the environment.
Take STIHL products including packaging to a suitable collection point for
recycling in accord- ance with local regulations.
Do not dispose with domestic waste.
33 EC Declaration of Con- formity
ANDREAS STIHL AG & Co. KG Badstr. 115 D-71336 Waiblingen
Germany
declare under our sole responsibility that
Designation:
Brushcutter
Make:
STIHL
Series:
FS 131
FS 131 R
Serial identification number: 4180
Displacement:
36.3 cm3
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 manu- factured in compliance with the following stand-
000BA073 KN
0458-432-8321-B
39
English
ards in the versions valid on the date of produc- tion:
EN ISO 11806-1, EN 55012, EN 6100061
The measured and the guaranteed sound power level have been determined in
accordance with Directive 2000/14/EC, Annex V, and standard ISO 10884.
Measured sound power level
FS 131: FS 131 R:
109 dB(A) 109 dB(A)
Guaranteed sound power level
FS 131: FS 131 R:
111 dB(A) 111 dB(A)
Technical documents deposited at:
ANDREAS STIHL AG & Co. KG Produktzulassung
The year of manufacture and serial number are applied to the product.
Done at Waiblingen, 15.07.2021
ANDREAS STIHL AG & Co. KG
pp
Dr. Jürgen Hoffmann
Director Product Certification & Regulatory Affairs
33 EC Declaration of Conformity
40
0458-432-8321-B
33 EC Declaration of Conformity
English
0458-432-8321-B
41
English
33 EC Declaration of Conformity
42
0458-432-8321-B
33 EC Declaration of Conformity
English
0458-432-8321-B
43
www.stihl.com
04584328321B
0458-432-8321-B
04584328321B
0458-432-8321-B
References
- Country Routing Page: Welcome to STIHL | STIHL
- REACH Regulation: Available in different languages | STIHL | STIHL
- Information on Physical Agents Directive Vibration | STIHL | STIHL
- Country Routing Page: Welcome to STIHL | STIHL