STIHL GS 461 Instruction Manual Notice d'emploi
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STIHL GS 461
Instruction Manual
Notice d’emploiG Instruction Manual 1 - 36 F Notice d’emploi 37 - 75
English
Contents
Guide to Using this Manual 2 Special Accessories 33 Dear Customer,
Safety Precautions and Working Maintenance and Repairs 34 Thank you for choosing a quality
Techniques 2 Disposal 34 engineered STIHL product.
Sample applications 9
Original Instruction Manual
STIHL Limited Emission Control This machine has been built using
Cutting Attachment 11 Warranty Statement 34 modern production techniques and
Mount guide bar and diamond comprehensive quality assurance.
abrasive chain 11 Every effort has been made to ensure
your satisfaction and troublefree use of
Tension diamond abrasive chain 13
the machine.
Check tension of diamond abrasive
chain 13 Please contact your dealer or our sales
company if you have any queries
Fuel 14
Printing inks contain vegetable oils, paper can be recycled.
concerning your machine.
Fueling 15
Your
Starting / Stopping the Engine 16
Operating Instructions 19
Air Filter System 20
Remove air filter 20
Cleaning the Air Filter 20 Hans Peter Stihl
Printed on chlorine-free paper
Engine Management 21
Adjusting the Carburetor 21
Spark Arresting Screen in Muffler 22
Spark Plug 23
Replacing the Starter Rope and
Rewind Spring 24
Storing the Machine 26
Taking Care of the Guide Bar 26
Checking and Replacing the Chain
© ANDREAS STIHL AG & Co. KG, 2013
Sprocket 27
Maintain and sharpen diamond
abrasive chain 28
0458-761-8221-A. VA2.A13.
Maintenance and Care 29
0000006307_004_GB
Main Parts 31
Specifications 33
{ This instruction manual is protected by copyright. All rights reserved, especially the rights to reproduce, translate and process
with electronic systems.
GS 461 1English
Guide to Using this Manual NOTICE
Safety Precautions and
Working Techniques
Caution where there is a risk of
damaging the machine or its individual Because the chain of a
Pictograms
components. concrete cutter runs at
very high speeds, spe-
Pictograms that appear on the machine Engineering improvements cial safety precautions
are explained in this Instruction Manual. must be observed to
reduce the risk of per-
Depending on the machine and STIHL's philosophy is to continually sonal injury.
equipment version, the following improve all of its products. For this
pictograms may appear on the machine. reason we may modify the design,
Fuel tank; fuel mixture of engineering and appearance of our
gasoline and engine oil products periodically.
It is important that you
Therefore, some changes, modifications carefully read the entire
and improvements may not be covered Instruction Manual before
Direction of chain travel in this manual. using the machine for the
first time and keep it in a
safe place for future ref-
erence. Non-compliance
Tension diamond abra- with the Instruction Man-
sive chain ual may cause serious or
even fatal injury.
Actuate decompression
valve Observe the national safety regulations
issued, e. g. by the employers' liability
insurance association, social security
institutions, occupational safety and
Water connection, shut- health authorities or other organizations.
off cock If you have never used a power tool
before: Ask the salesperson or another
expert to explain how to use it safely – or
attend a training course.
Symbols in text Minors should never be allowed to use
the machine – except for young trainees
over the age of 16 when working under
WARNING supervision.
Warning where there is a risk of an Children, animals and bystanders must
accident or personal injury or serious remain at a distance.
damage to property.
2 GS 461English
When not using the machine, it must be The machine must not be used for any Clothing must be sturdy
laid down in such a way that it does not other purposes – risk of injury! and snug-fitting, but allow
endanger anyone. Ensure that the complete freedom of
It is not suitable for cutting wood or
machine cannot be used without movement. Wear snug
wooden objects.
authorization. fitting clothing – an over-
Asbestos dust is extremely toxic - the all, not a loose-fitting
The user is responsible for accidents or
machine must therefore never be used jacket.
risks involving third parties or their
to cut asbestos!
property. Do not wear clothing that could become
Only use tools, guide bars, diamond trapped in moving parts of the machine
The machine should only be provided or
abrasive chains or accessories that – no scarves, no neckties, no jewelry.
loaned to people familiar with this model
have been approved by STIHL for this Long hair must be tied up and covered.
and its operation. The Instruction
machine or which are technically
Manual should always be handed over Wear safety boots with
equivalent. Contact a servicing dealer if
with the machine. steel toe caps and non-
in doubt. Only use high-quality tools or
Use of machines that emit noise may be accessories. Otherwise there may be a slip soles.
restricted in terms of time by national risk of accidents or damage to the
and/or on-site, local regulations. machine.
The machine may only be operated by STIHL recommends the use of genuine Wear a hard hat wher-
people who are fit, in good physical STIHL guide bars, diamond abrasive ever there is any risk of
health and in good mental condition. chains, chain sprockets and falling objects. Wear gog-
accessories. These have been gles to protect the eyes
If you have any condition that might be against flying objects.
optimized for the product and the user's
aggravated by strenuous work, check Wear "personal" hearing
requirements.
with your doctor before operating a protection – e. g., ear
machine. Never modify the machine in any way, defenders.
as this could be extremely dangerous.
If you have a pacemaker: The ignition A face mask alone is not sufficient to
STIHL excludes all liability for personal
system of your machine produces an protect the eyes.
injury and damage to property caused
electromagnetic field of very low
while using unauthorized attachments. Dust (e. g., crystalline material from the
intensity. An effect on individual
pacemaker types cannot be excluded Do not use high-pressure cleaners to object being cut), fumes and smoke may
entirely. STIHL recommends that you clean the machine. The hard water jet be produced while cutting - health
consult your doctor and the can damage parts of the machine. hazard!
manufacturer of your pacemaker in Always wear a dust mask if dust is
order to avoid health hazards. Clothing and equipment generated.
Anyone who has consumed alcohol, If fumes or smoke are anticipated (e. g.,
medicines affecting their ability to react Wear proper protective clothing and when cutting composite materials), wear
or drugs must not operate the machine. equipment. respiratory protection.
Postpone the work if the weather is bad
Wear sturdy gloves.
(rain, snow, ice, wind) – higher risk of
accidents!
The machine may only be used for
cutting.
GS 461 3English
STIHL can supply a comprehensive Dust may collect on the engine unit, Only use diamond abrasive chain for the
range of protective clothing and particularly around the carburetor. If the specified materials, observe diamond
equipment. dust is soaked with gasoline, it may abrasive chain codes.
catch fire. For this reason, ensure that
Always cut with water.
Transporting the machine the dust is always removed.
Before fitting used diamond abrasive
Check for fuel leakage chains, check that they are not cracked,
Always stop the engine and attach the while refueling and during chipped, check also that there are no
chain scabbard. operation. Never start the damaged or missing segments, signs of
engine if fuel has been overheating (discoloration).
Carry the machine only by the top spilled or is leaking –
handle – guide bar towards the rear – Fatal burns may result! Never use diamond abrasive chains that
with the hot muffler facing away from the are cracked or have chipped segments.
body. Bayonet filler cap Visit your servicing dealer.
Avoid touching hot parts of the machine,
especially the surface of the muffler – Before starting
risk of burns!
In vehicles: Properly secure your Check that concrete cutter is properly
machine to prevent turnover, damage assembled and in good condition – refer
and fuel spillage. to appropriate chapters in the Instruction
Manual:
Refueling – Check fuel system for leaks,
especially the visible parts, e. g.,
Never use a tool to open or close the filler cap, hose connections, fuel
Gasoline is an extremely
bayonet filler cap. This could damage pump. Do not start the engine if
flammable fuel – keep
the cap and cause fuel to leak out. there are leaks or damage – risk of
clear of naked flames and
fire – do not spill any fuel Secure the bayonet filler cap tightly after fire! Have the machine repaired by a
– no smoking. refueling. servicing dealer before using it
Switch off the engine before refueling. – functional, front hand guard
Diamond abrasive chain
Never refuel the machine while the – Check chain sprocket
engine is still hot – the fuel may spill over – Sprocket nose moves easily
– risk of fire! The diamond abrasive chain, guide bar
and chain sprocket must match each – Correctly mounted guide bar
Open the fuel filler cap carefully so that other and your concrete cutter. – The diamond abrasive chain must
any excess pressure is relieved
Use only approved diamond abrasive be suitable for the material to be cut.
gradually and fuel does not splash out.
chains. If unauthorized chains are used, It must be in good condition and
The machine may only be refueled in a aggressive cutting cannot be ruled out. fitted correctly (direction of running).
well ventilated place. Clean the machine This may lead to uncontrolled and – Correctly tensioned diamond
immediately if fuel is spilled. Change exceedingly dangerous reaction forces abrasive chain
your clothes immediately if they are (kickback) in the machine – risk of fatal
contaminated with fuel. injuries!
4 GS 461English
– The throttle trigger and throttle Before starting, open the shut-off valve Use extreme caution with openings,
trigger lockout must move easily – completely and ensure a supply of water recesses, etc., someone could be
throttle trigger must return to the diamond abrasive chain – do not standing behind them – look
automatically to the idle position allow diamond abrasive chain to run dry. beforehand.
when released
Never let the machine run unattended.
– Master control lever can be moved Holding and guiding the machine
When the engine is running: The
to STOP or 0
diamond abrasive chain continues to run
– Check that the spark plug boot is for some time after the throttle trigger
secure. A loose boot can lead to has been released – Risk of injury due to
flying sparks which may ignite the coasting effect!
escaping fuel/air mixture – risk of
Beware of slipping on ice, water, snow
fire!
or uneven ground!
2411BA046 KN
– Never attempt to modify the controls
Never work on a ladder or on any other
or safety devices
unsteady support. Do not work above
– Keep the handles dry and clean, shoulder height and never operate the
free from oil and dirt – important for Always hold the machine firmly with both machine with one hand - risk of
safe control of the concrete cutter hands: Right hand on the rear handle – accidents!
The concrete cutter should only be used even if you are left-handed. To ensure Ensure that the working area is clear –
if it is in full working order – risk of reliable control, wrap your thumbs tightly watch out for obstacles, holes and pits.
accident! around the handlebar and handle.
Do not work alone – keep within calling
The object that is to be cut must be distance of others in case help is
Starting the engine positioned firmly; always guide the needed.
machine to the workpiece – never vice
More care and attention than usual are
Move at least 3 meters away from the versa.
required when wearing ear protection –
place at which the machine was refueled warning sounds (shouts, alarms, etc.)
and never start the machine in enclosed During work
cannot be heard properly.
spaces.
Take breaks in due time in order to
The machine may only be used on level Ensure you always have a firm and safe prevent tiredness and exhaustion – risk
ground. Ensure a firm and secure footing. of accidents!
footing and hold the machine firmly. The In the event of impending danger or in
diamond abrasive chain must not touch Keep easily combustible materials away
an emergency, switch off the engine from hot exhaust gases and hot mufflers
any objects or the ground and must not immediately by moving the master
be in the cut, because it may begin to – risk of fire! Mufflers with catalytic
control lever to STOPor0. converters can become especially hot.
rotate when the machine is started.
The machine is operated by only one
The machine is operated by only one person. There should not be any other
person. There should not be any other person within the working area.
person within the working area, not even
when starting the machine.
Do not drop-start the engine – start as
described in the Instruction Manual.
GS 461 5English
Your power tool produces In the event of noticeable changes in Reactive forces
toxic exhaust fumes as cutting behavior (e. g., increased
soon as the engine is vibration, reduced cutting performance),
stop work and eliminate the causes of The most frequently occurring reactive
running. These gases
the changes. forces are pull-in and pushback.
may be colorless and
odorless and may contain – Switch off the engine and wait until Pull-in (A)
unburnt hydrocarbons the diamond abrasive chain is
and benzene. Never run stationary
the engine indoors or in A
poorly ventilated areas, – Check condition and correct tension
even if your model is of diamond abrasive chain
equipped with a catalytic – Ensure that the cutting blades are
converter. sharp
2411BA001 KN
Ensure proper ventilation when working Never touch the diamond abrasive chain
in trenches, hollows or other confined when the motor is running. If the
areas. Toxic fumes can kill! diamond abrasive chain becomes
jammed by an object, switch off the When the diamond abrasive chain on
If you feel sick, if you have a headache, the bottom of the guide bar –
vision problems (e.g., your field of vision engine immediately before attempting to
remove the object – risk of injury! overbucking – is jammed or encounters
gets smaller), hearing problems, a solid object, the concrete cutter may
dizziness or inability to concentrate, stop To change the diamond abrasive chain, suddenly be drawn forward to the
work immediately. Such symptoms may switch off the engine – risk of injury! workpiece.
be caused by an excessively high
concentration of exhaust emissions – If the machine is subjected to unusually
Pushback (B)
risk of accident! high loads for which it was not designed
(e. g., heavy impact or a fall), always
No smoking when working with or near
the machine - risk of fire! Combustible
check that it is in good condition before B
continuing work – refer also to the
fuel vapor may escape from the fuel section "Before starting". Check the fuel
system. system for leaks and make sure the
Examine the diamond abrasive chain safety devices are working properly.
2411BA002 KN
periodically at short intervals, check that Never continue using a power tool that is
they are not cracked, chipped, check not in perfect working order. Consult a
also that there are no damaged or servicing dealer if in doubt.
missing segments, signs of overheating Check for correct idling, so that the When the diamond abrasive chain on
(discoloration). diamond abrasive chain stops moving the top of the guide bar – underbucking
Never use diamond abrasive chains that when the throttle trigger is released. – is jammed or encounters a solid object,
are cracked or have chipped segments. Check and/or correct the idle setting the concrete cutter may suddenly be
Visit your servicing dealer. regularly. Have the machine repaired by driven straight back toward the operator.
a STIHL servicing dealer if the diamond
abrasive chain continues to run
nevertheless.
6 GS 461English
Examine the workplace. Avoid all the machine while in the cut – do not
danger due to damaged piping or drop the machine into the cut – danger of
electrical wiring. breakage!
The machine must not be used near If cutting performance begins to
inflammable substances or gases. deteriorate, check the sharpness of the
diamond abrasive chain, resharpen as
002BA146 KN
Never use the machine to cut inside
needed. To do this, briefly cut through
pipes, metal troughs or other containers
abrasive material, e. g., sandstone,
unless you are absolutely sure that they
aerated concrete or asphalt.
do not contain any volatile or
– Do not allow the guide bar to inflammable substances. When working above ground level:
become jammed
Never leave the machine unattended – Always use a lift bucket
– Always be aware that the object to with the engine running. Switch off the
be cut may move and other factors – Never use the machine while
engine before leaving the machine
may cause the cut to close and jam standing on a ladder
(e. g., for a break).
the diamond abrasive chain – Never use the machine in unsteady
Work calmly and methodically – only
– The object to be cut must be locations
with good lighting and visibility. Do not
secured and supported so that the endanger others – stay alert at all times. – Never cut above shoulder height
cut remains open during and after
cutting – Never use the machine with one
hand
– Do not twist the guide bar in the cut
Begin cutting with the concrete cutter at
Working – abrasive cutting full throttle.
At the end of the cut, the concrete cutter
2411BA003 KN
Ensure sufficient water supply to is no longer supported by the cutting
diamond abrasive chain – do not allow attachment in the cut. The machine's
diamond abrasive chain to run dry. weight must be borne by the user – risk
of loss of control!
Always wet cut – regardless of the Make certain that all parts of your body
material to be cut. are well clear of the extended range of Keep water and sludge away from
travel of the diamond abrasive chain. electric cables - risk of electric shocks!
The diamond abrasive chain must be
guided straight in the cut, without Only pull concrete cutter out of the
Vibrations
wedging. Never exert lateral pressure on object being cut with the diamond
the diamond abrasive chain. abrasive chain running.
Only use concrete cutter for cutting – not Prolonged use of the power tool may
Do not use the diamond abrasive chain result in vibration-induced circulation
for lateral grinding or scrubbing. for prying or shoveling away objects.
problems in the hands (whitefinger
Do not use the starting throttle position Always decide the cutting direction disease).
for cutting. Engine speed cannot be before positioning the concrete cutter.
After that, do not change the cutting No general recommendation can be
controlled with the throttle trigger in this given for the length of usage because it
position. direction. Avoid knocks and bumps with
depends on several factors.
GS 461 7English
The period of usage is prolonged by: STIHL recommends the use of genuine – to change chains
STIHL spare parts. Such parts have
– Hand protection (wearing warm – for remedying malfunctions
been optimized for the machine and the
gloves)
user's requirements. Maintenance, replacement, or repair of
– Work breaks the emission control devices and
Before starting any maintenance or
systems may be performed by any
The period of usage is shortened by: repair work and before cleaning the
nonroad engine repair establishment or
Any personal tendency to suffer machine, always stop the engine – risk
– individual. However, if you make a
from poor circulation (symptoms: of injury! – Exception: adjustment of
warranty claim for a component which
frequently cold fingers, tingling carburetor and idle speed.
has not been serviced or maintained
sensations). To reduce the risk of fire due to ignition properly or if nonapproved replacement
– Low outside temperatures. outside the cylinder, move the slide parts were used, STIHL may deny
control to STOP or 0 before turning the coverage.
– The force with which the handles engine over on the starter with the spark
are held (a tight grip restricts For any maintenance please refer to the
plug boot removed or the spark plug
circulation). maintenance chart and to the warranty
unscrewed.
statement near the end of the instruction
Continual and regular users should Do not service or store the machine near manual.
monitor closely the condition of their a naked flame – risk of fire due to the
hands and fingers. If any of the above fuel.
symptoms appear (e.g. tingling
sensation in fingers), seek medical Check fuel cap regularly for tightness.
advice. Use only spark plugs that are in perfect
condition and have been approved by
Maintenance and repairs STIHL – see "Specifications".
Inspect ignition lead (insulation in good
The machine must be serviced regularly. condition, secure connection).
Do not attempt any maintenance or Check that the muffler is in perfect
repair work not described in the working condition.
Instruction Manual. All other work should
be carried out by a servicing dealer. Do not use the machine if the muffler is
damaged or missing – risk of fire! –
STIHL recommends that maintenance Hearing damage!
and repair work be carried out only by
authorized STIHL dealers. STIHL Never touch a hot muffler – risk of burns!
dealers receive regular training and are The condition of the antivibration
supplied with technical information. elements influences vibration behavior –
Use only high-quality spare parts. inspect antivibration elements
Otherwise, there may be a risk of periodically.
accidents or damage to the machine.
Contact a servicing dealer if in doubt. Switch off the engine
– to check the chain tension
– to retension the chain
8 GS 461English
If necessary, use wedges and if Cut in several passes
Sample applications necessary, leave small ridges that hold
the part that is to be separated in
position. Break these ridges later.
Use diamond abrasive
chain only with water. Before finally separating the part,
Connect concrete cutter determine:
to water supply network
– how heavy the part is A
(min. 1.5 bar).
2411BA005 KN
– how it can move after separation
The water introduced is used to cool the
diamond abrasive chain and rinse the – whether it is under tension
cutting attachment, and for binding dust. When breaking out the part, do not
endanger assistants. N Mark cutting line (A)
After finishing work, run the concrete
cutter for a few seconds with water and
at operating speed to rinse the cutting Plunge-cutting
attachment.
If the water pressure or water volume is Begin cutting with the concrete cutter at
too low, this leads to significantly full throttle.
2411BA006 KN
increased wear and irreparable damage
to the cutting attachment – danger of
breakage! 3.
Objects to be cut 2.
N Work along the cutting line. When
making corrections, do not tilt the
2411BA004 KN
1. diamond abrasive chain, always
– Must be fully supported reposition it afresh
– Must be secured so it cannot roll or
slip off
1. Apply the lower portion of the guide
– Must be prevented from vibrating bar nose
2. Swing slowly into the plunge-cutting
Severed parts
position
3. Make the plunge cut very carefully
With openings, recesses, etc., the
sequence of the cuts is important. When making the plunge cut into
Always make the last cut so that the existing, narrower joints, proceed with
diamond abrasive chain does not extreme care.
become jammed and so that the
operator is not endangered by the
severed or separated part.
GS 461 9English
Cutting round and hollow bodies Shaping pipe always position it anew instead – if
necessary, use wedges and if
necessary, leave small ridges that
hold the part that is to be separated
in position. Break these ridges later
2411BA007 KN
N Secure pipes, round bodies, etc. N Secure pipes, round bodies, etc.
against rolling away against rolling away
N Mark a cutting line - when N Mark a cutting line - when
determining the cutting line, avoid determining the cutting line, avoid
reinforcement, especially in the reinforcement, especially in the
direction of the severing cut direction of the severing cut
N Make the plunge cut very carefully
DANGER
N Feed with full cutting depth along
the cutting line – for small Manual cutting along this line requires
corrections of direction, do not tilt particular caution and precision.
the diamond abrasive chain, but
always position it anew instead – if
necessary, use wedges and if
necessary, leave small ridges that
hold the part that is to be separated
in position. Break these ridges later
2411BA008 KN
N Cut into pipes, round bodies, etc. in
the area at the ends of the cutting
line, so that the material does not
break away
N Make the plunge cut very carefully
at the apex and cut outward on both
sides - feed with full cutting depth
along the cutting line – for small
corrections of direction, do not tilt
the diamond abrasive chain, but
10 GS 461English
Diamond abrasive chain
Cutting Attachment Mount guide bar and
diamond abrasive chain
The correct use of the STIHL diamond
STIHL is the only manufacturer who abrasive chain ensures economical use
manufactures concrete cutters, guide Removing the chain sprocket cover
and avoids accelerated wear.
bars, diamond abrasive chains and
chain sprockets itself. The STIHL diamond abrasive chain is
suitable for cutting the following
Diamond abrasive chain, guide bar and materials:
chain sprocket make up the cutting 1
attachment. – Concrete 1
The cutting attachment that is supplied – Reinforced concrete
2411BA011 KN
has been optimized for the concrete – General blocks 2
cutter.
– Masonry
1 – Stone pipes
N Unscrew nuts (1) from the studs –
2 – Abrasive stone*, e. g. asphalt and nuts are fastened to the chain
bricks (sandstone) sprocket cover so that they are
– Hard stone*, granite* secured against loss
2411BA009 KN
– ductile cast iron pipes* N Remove chain sprocket cover (2)
a 3
t=a:2 *) Restrictions on power and service life
are possible
– The pitch (t) of the diamond Do not cut any other materials – risk of
abrasive chain (1), chain sprocket 3
accident!
and sprocket nose of the Rollomatic
guide bar must match
2411BA012 KN
Chain scabbard
– The drive link gauge (2) of the
4
diamond abrasive chain (1) must be
matched to the groove width of the The product contents includes a chain
guide bar (3) scabbard that is suitable for the bar and N Turn the screw (3) to the left until
chain. the tensioner slide (4) butts against
When pairing components that are not the left end of the housing slot
compatible with each other, the cutting
attachment may become damaged
beyond repair after only a short period of
operation.
GS 461 11English
Fit diamond abrasive chain N Position the right locating hole (2)
over the peg of the tensioner slide – WARNING
simultaneously place the diamond If the drive links are not directionally
abrasive chain over the sprocket aligned one behind the other correctly,
wheel (3) the diamond abrasive chain and chain
N Turn screw (4) to the right until there sprocket will be damaged beyond repair.
is very little diamond abrasive chain N Position the left locating hole (5)
sag on the underside of the bar and over the peg of the tensioner slide –
2411BA013 KN
the lugs of the drive links engage in simultaneously place the diamond
the bar groove abrasive chain over the sprocket
N Refit the chain sprocket cover – and wheel (3)
N Fit the diamond abrasive chain then screw on the nut by hand until N Turn screw (4) to the right until there
starting at the nose of the guide bar it is fingertight is very little diamond abrasive chain
N Go to chapter "Tensioning the sag on the underside of the bar and
diamond abrasive chain" the lugs of the drive links engage in
the bar groove
Moving the guide bar Refit the chain sprocket cover – and
1 1 N
then screw on the nuts by hand until
4 they are fingertight
2411BA0014 KN
Only move the guide bar if the diamond
abrasive chain cannot be tensioned N Go to chapter "Tensioning the
properly. diamond abrasive chain"
N Removing the chain sprocket cover
N Position the guide bar over the
bolts (1) – align drive links so that N Remove guide bar with diamond
the position lines up with the symbol abrasive chain
(arrow) N Fit the diamond abrasive chain
starting at the nose of the guide bar
WARNING
If the drive links are not directionally
aligned one behind the other correctly,
the diamond abrasive chain and chain 1
sprocket will be damaged beyond repair. 1
4
2411BA049 KN
N Position the guide bar over the
bolts (1) – align drive links so that
the position lines up with the symbol
(arrow)
12 GS 461English
Tension diamond abrasive Check tension of diamond
chain abrasive chain
2411BA0045 KN
1
2411BA0015 KN
2411BA016 KN
N Check tension of diamond abrasive
chain – diamond abrasive chain can a
be pulled across the guide bar by
hand
For retensioning during operation: N Switch off the engine
A new diamond abrasive chain must be
N Switch off the engine N Diamond abrasive chain can sag a
retensioned more frequently than one
maximum of a = 15 mm
N Put on protective gloves that has been in use already for an
extended period. N Retension diamond abrasive chain
N Loosen nuts
if necessary – see "Tensioning the
N Check chain tension frequently –
N Raise the guide bar at the nose diamond abrasive chain".
see "Operating Instructions"
N Use the screwdriver to turn the If the diamond abrasive chain sags too
screw (1) to the right until the much, this leads to significantly
distance (a) = approx. 5 mm increased wear of the cutting
attachment.
If the distance (a) = approx. 5 mm
cannot be set due to an elongated A new diamond abrasive chain must be
diamond abrasive chain, move guide bar retensioned more frequently than one
– see installing "guide bar and diamond that has been in use already for an
abrasive chain". extended period.
N Raise the guide bar further and N Check chain tension frequently –
tighten the nuts securely see "Operating Instructions"
GS 461 13English
Gasoline with an ethanol content of Examples
Fuel more than 10% can cause running
Gasoline Oil (STIHL 50:1 or equiva-
problems and major damage in engines
lent high-quality oils)
This engine is certified to operate on with a manually adjustable carburetor
and should not be used in such engines. liters liters (ml)
unleaded gasoline and with the mix ratio
1 0.02 (20)
50:1. Engines equipped with M-Tronic can be
run on gasoline with an ethanol content 5 0.10 (100)
Your engine requires a mixture of high-
of up to 25% (E25). 10 0.20 (200)
quality premium gasoline and high-
quality two-stroke air-cooled engine oil. Use only STIHL two-stroke engine oil or 15 0.30 (300)
equivalent high-quality two-stroke air- 20 0.40 (400)
Use premium branded unleaded
gasoline with a minimum octane rating cooled engine oils for mixing. 25 0.50 (500)
of 89 (R+M)/2. We recommend STIHL 50:1 two-stroke Dispose of empty mixing-oil canisters
Note: Models equipped with a catalytic engine oil since it is specially formulated only at authorized disposal locations.
converter require unleaded gasoline. A for use in STIHL engines.
few tankfuls of leaded gasoline can Do not use BIA or TCW (two-stroke
reduce the efficiency of the catalytic water cooled) mix oils!
converter by more than 50%.
Use only STIHL 50:1 heavy-duty engine
Fuel with a lower octane rating may oil or an equivalent quality two-stroke
result in preignition (causing "pinging") engine oil for the fuel mix in models
which is accompanied by an increase in equipped with a catalytic converter.
engine temperature. This, in turn,
Take care when handling gasoline.
increases the risk of the piston seizure
Avoid direct contact with the skin and
and damage to the engine.
avoid inhaling fuel vapour.
The chemical composition of the fuel is
The canister should be kept tightly
also important. Some fuel additives not
closed in order to avoid any moisture
only detrimentally affect elastomers
getting into the mixture.
(carburetor diaphragms, oil seals, fuel
lines etc.), but magnesium castings as The fuel tank and the canister in which
well. This could cause running problems fuel mix is stored should be cleaned
or even damage the engine. For this from time to time.
reason it is essential that you use only
high-quality fuels! Fuel mix ratio
Fuels with different percentages of
ethanol are being offered. Ethanol can Only mix sufficient fuel for a few days
affect the running behaviour of the work, not to exceed 3 months of storage.
engine and increase the risk of lean Store in approved safety fuel-canisters
seizure. only. When mixing, pour oil into the
canister first, and then add gasoline.
14 GS 461English
Refuel Changing the fuel pickup body every
Fueling year
Take care not to spill fuel while fueling
and do not overfill the tank. STIHL
recommends use of the STIHL filling
system for fuel (special accessory).
Preparing the machine Closing the filler cap
N Before fueling, clean the filler cap
1.
and the area around it so that dirt
cannot fall into the tank
2.
N Always position the machine so that
the filler cap is facing upwards
2411BA018 KN
WARNING
Never use a tool to open the bayonet
2411BA019 KN
filler cap. This could damage the cap N Fit the cap and turn it until it
and cause fuel to leak out. engages in the bayonet catch
N Press the cap down as far as
Opening the twist lock
possible with your hand and turn it N Drain the fuel tank
clockwise (approx. 1/8 of a turn)
N Pull the fuel pickup body out of the
until it engages properly
1. tank with a hook and disconnect it
from the hose
2. N Connect a new fuel pickup body to
the hose
Return the fuel pickup body to the
2411BA017 KN
N
tank
N Press the filler cap down as far as
possible by hand, then turn it
counterclockwise (approx. 1/8 turn)
and remove
GS 461 15English
To set the Master Control lever to warm Connect concrete cutter to water supply
Starting / Stopping the start n, first set it to cold start l, then network
Engine push the Master Control lever into the
warm start n position.
The four positions of the Master Control
Changing to warm start n is only
lever possible from the cold start l position.
When the throttle trigger is squeezed,
the Master Control lever returns from
warm start n to run F.
2411BA025 KN
STOP To switch off the engine, set the master
control lever to STOP or 0.
Position cold start l N Connect concrete cutter to water
supply network (min. 1.5 bar)
0 – If the engine is cold
N Before starting, open shut-off valve
– If the engine stalls during opening of (arrow) completely
throttle after starting
– If the fuel tank has run empty Hold concrete cutter
(engine stalled out)
Position warm start n There are two ways to hold the concrete
cutter during starting.
– If engine is warm (once the engine
001BA140 KN
has been running for approx. one
minute)
– When the engine has fired for the
STOP or 0 – engine off – ignition is first time
switched off
– After ventilation of the combustion
Run F – engine is running or can start chamber, if the engine was flooded
Warm start n – this position is for
starting the warm engine
Cold start l – this position is for starting
the cold engine
Adjusting the Master Control lever
The throttle trigger lockout and throttle
trigger must be pressed simultaneously
to adjust the Master Control lever from
run F to cold start l.
16 GS 461English
On the ground Between the knees or thighs Starting
2411BA020 KN
0001BA021 KN
2411BA022 KN
N Place the concrete cutter securely N Clamp the rear handle between the
on the ground – assume a steady knees or thighs N With the right hand, pull the starter
stance- the diamond abrasive chain grip slowly until you feel it engage –
N Grip the handlebar firmly with the
must not touch any objects or the and then give it a brisk strong pull –
left hand – thumb wrapped around
ground simultaneously press down on the
the handlebar
N Press the concrete cutter firmly handlebar – do not pull the starter
against the ground, holding the front rope out all the way – risk of
handle with your left hand, thumb breakage! Do not let the starter grip
wrapped round the handle snap back – guide it vertically back
into the housing so that the starter
N Place your right foot into the rear rope can rewind properly
handle
Starting the concrete cutter
Before starting, open the shut-off valve
completely and ensure a supply of water
to the diamond abrasive chain – do not
allow diamond abrasive chain to run dry.
GS 461 17English
Decompression valve When the engine has turned over for the
first time
STOP
STOP
2411BA023 KN
1
2411BA026 KN
N Press the button, the
decompression valve will be
opened
1 N Move the Master Control lever (1) to
The decompression valve is closed the position warm start n
2
automatically when the engine fires for
2411BA024 KN
N Press the button on the
the first time. For this reason, press the decompression valve
button again before each additional
starting attempt. N Hold and continue cranking the
concrete cutter
N Simultaneously press the throttle
DANGER trigger lockout (2) and throttle
trigger (3) – set the master control Once the engine is running
There must not be anyone within the lever
swivel range of the concrete cutter.
Position cold start l
STOP
– If engine is cold (even if the engine
has stalled during opening of
throttle after starting) 1
Position warm start n 2
2411BA027 KN
– If engine is warm (once the engine
has been running for approx. one
minute)
N Blip the throttle trigger (2); the
N Hold and start the concrete cutter
Master Control lever (1) jumps to
run F and the engine begins to idle
The concrete cutter is now ready for use.
At very low temperatures
N Let the engine warm up briefly with
the throttle slightly open
18 GS 461English
Switch off the engine If the diamond abrasive chain sags too
Operating Instructions much, this leads to significantly
increased wear of the diamond abrasive
N Set master control lever to STOP or chain and chain sprocket – retension the
0 During the break-in period diamond abrasive chain – see
"Tensioning the diamond abrasive
If the engine does not start chain".
A factory new machine should not be run
at high revs (full throttle off load) for the A new diamond abrasive chain must be
The Master Control lever was not first three tank fillings. This avoids retensioned more frequently than one
returned to its "warm start" position n in unnecessarily high loads during the that has been in use already for an
time when the engine turned over for the break-in period. As all moving parts extended period.
first time and has now flooded. have to bed in during the break-in
period, the frictional resistances in the After a long period of full-throttle
N Remove the spark plug - see "Spark
plug" shortblock are greater during this period. operation
The engine develops its maximum After a long period of full-throttle
N Dry the spark plug power after about 5 to 15 tank fillings. operation, allow engine to run for a while
N Set master control lever to STOP or at idle speed so that the heat in the
0 During work engine can be dissipated by flow of
N Crank the engine several times with cooling air. This protects engine-
the starter – to clear the combustion mounted components (ignition,
chamber CAUTION carburetor) from thermal overload.
N Reinstall the spark plug – see Always work with water. After finishing work
"Spark plug"
N Set the Master Control lever to CAUTION
warm start n – even if the engine is Short-term storage
Do not make the mixture leaner to
cold achieve an apparent increase in power – Wait for engine to cool down. Keep the
N Restart the engine this could damage the engine – see machine with a full tank of fuel in a dry
"Adjusting the Carburetor". place, well away from sources of
Wet filter ignition, until you need it again.
Check chain tension frequently
N Dry wet filter if necessary – do not Clean and dry guide bar and diamond
expose to extreme heat The diamond abrasive chain stretches abrasive chain, and spray with STIHL
and begins to sag. The drive links on the multispray – in particular the bearing of
N If the filter is very dirty, clean the underside of the bar must not come out the sprocket nose – corrosion protection.
filter thoroughly – see "Cleaning the of the bar groove by more than 15 mm – Do not spray engine unit!
air filter" the diamond abrasive chain may
otherwise jump off the bar – retension Long-term storage
the diamond abrasive chain – see
See "Storing the machine"
"Tensioning the diamond abrasive
chain".
GS 461 19English
Air Filter System Remove air filter Cleaning the Air Filter
When dry, STIHL filters attain a long If there is a noticeable loss of engine
service life. power:
N Always use STIHL filters dry N Dry wet air filter if necessary – do
not expose to extreme heat
Fouled air filters will impair engine
performance, increase fuel consumption N If the air filter is very dirty, clean the
2411BA030 KN
and make the machine more difficult to filter thoroughly
start.
Thorough filter cleaning
N Wash the air filter in STIHL special-
N Turn screw plug above the rear purpose cleaner (special
handle in the direction of the arrow accessory) or a clean, non-
and remove filter cover – screw plug flammable cleaning liquid (e. g.,
is secured in the filter cover warm soapy water) – rinse the air
filter from inside to out under a water
flow – do not use high-pressure
washers
N Dry the air filter – do not expose to
extreme heat, do not dry with
compressed air
2411BA031 KN
N Do not oil the air filter
N Reinstall air filter
N Detach the air filter Always replace a damaged air filter.
Do not remove and clean the auxiliary
filter.
20 GS 461English
Engine Management Adjusting the Carburetor
Exhaust emissions are controlled by the
General Information
design of the fundamental engine
parameters and components (e.g.
3443BA001 KN
carburation, ignition, timing and valve or The carburetor comes from the factory
port timing) without the addition of any with a standard setting.
major hardware.
This setting provides an optimum fuel-air
N Turn high speed screw (H)
mixture under most operating
counterclockwise as far as stop (no
conditions.
more than 3/4 turn).
With this carburetor it is only possible to
N Turn the low speed screw (L)
correct the adjusting screws within fine
clockwise as far as stop, then turn it
limits.
back 1/4 turn.
The ignition module limits maximum
engine speed. Therefore, maximum Adjusting Idle Speed
engine speed cannot be increased by
turning the high speed screw (H) any
further clockwise (leaner). Before starting, open the shut-off cock
fully so that water flows to the diamond
Standard Setting abrasive chain – never allow chain to run
dry.
N Carry out the standard setting.
N Shut off the engine.
N Start and warm up the engine.
N Check the air filter and clean or
replace if necessary.
N Check the spark arresting screen
(not in all models, country-specific)
in the muffler and clean or replace if
necessary.
3443BA002 KN
GS 461 21English
Engine stops while idling or chain runs N Carry out the standard setting.
while engine is idling Spark Arresting Screen in
N Warm up the engine. Muffler
N Turn the idle speed screw (LA) N Turn high speed screw (H) slightly
clockwise as far as stop or until the In some countries, the muffler is fitted
clockwise (leaner) – no further than
chain begins to run – then turn the with a spark arresting screen.
stop.
screw back 1 1/2 turns. N If engine performance deteriorates,
check the spark arresting screen in
WARNING NOTICE the muffler
If the chain continues moving when the After returning from high altitude, reset N Let the muffler cool down
engine is idling, have your machine the carburetor to the standard setting.
checked and repaired by your servicing If the setting is too lean there is a risk of
dealer. engine damage due to insufficient
lubrication and overheating.
Erratic idling behavior, poor acceleration
(even though low speed screw is open 1
1/4 turn)
3443BA009 KN
N Remove four screws
N Remove exhaust casing (1) of the
muffler
3443BA003 KN
3
Idle setting is too lean
N Turn the low speed screw (L) 2
counterclockwise until the engine
3443BA010 KN
runs and accelerates smoothly.
It is usually necessary to change the
setting of the idle speed screw (LA) after
every correction to the low speed N Bend back the retaining lugs (2)
screw (L). N Pull out spark arresting screen (3)
Fine Tuning for Operation at High N Clean the dirty spark arresting
screen, replace if damaged or
Altitude
heavily carbonized
N Refit the spark arresting screen in
A slight correction of the setting may be
reverse order of steps
necessary if engine does not run
satisfactorily:
22 GS 461English
Spark Plug
1 1
N If the engine is down on power,
difficult to start or runs poorly at idle
speed, first check the spark plug. 2
2411BA032 KN
000BA045 KN
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 N Lift the air baffle (1) up and off
WARNING
type approved by STIHL – see N Unplug spark plug boot (2)
"Specifications". If the spark plug comes with a
N Unscrew spark plug detachable adapter nut (1), screw the
Remove the spark plug adapter onto the thread and tighten it
Checking the spark plug down firmly to reduce the risk of arcing
and fire.
N Remove coarse dirt from the
machine
Installing the spark plug
000BA039 KN
2
A
2411BA030 KN
1
2411BA033 KN
N Clean dirty spark plug.
N Turn screw plug above the rear N Check electrode gap (A) and
handle in the direction of the arrow readjust if necessary – see
"Specifications". N Install in the spark plug and tighten
and remove filter cover – screw plug
is secured in the filter cover N Rectify the problems which have N Press on the spark plug boot (1)
caused fouling of the spark plug. firmly
Possible causes are: N Insert the air baffle (2) from above
– Too much oil in fuel mix. N Mount filter cover
– Dirty air filter.
– Unfavorable running conditions.
GS 461 23English
Replacing a torn starter rope
Replacing the Starter Rope
and Rewind Spring
Removing the fan housing 7
5
6
6
2411BA035 KN
4
8 7
N Carefully press the spring clip (4) off
of the axle with a screw driver or
suitable pliers
2
2411BA036 KN
N Remove washer (5)
1 1 N Remove the pawls (6)
N Remove the rope rotor (7)
N Thread the starter handle with the
N Lever the rope out of the starter
starter rope from top to bottom
handle with a screwdriver
through the rope guide bush (8)
1 1
2411BA034 KN
N Remove the remainder of the rope
N Pull the starter rope through the
3 from the rotor and starter handle
rope rotor (7) and secure it with an
overhand knot
N Remove screws (1) N Coat the bearing bore in the rope
N Push the hand guard (2) upwards rotor with non-resinous oil
N Pull the bottom of the fan N Slip the rope rotor onto the starter
housing (3) away from the post (9) – turn it back and forth a
213BA019 KN
crankcase and remove downwards little until the anchor loop of the
rewind spring engages
N Thread a new ElastoStart starter
rope from top to bottom through the
starter handle and
N Press the remaining rope into the
handle until the nipple is flush with
the handle
24 GS 461English
rope guide bushing. If it tips
sideways: increase the spring
5 tension by another turn.
6 N It must be possible to turn the rope
6 rotor another half-turn when the
rope has been drawn out
2411BA037 KN
2411BA039 KN
4 completely. If not, the spring has
been tensioned too tightly and may
break! Remove one turn of the rope
N Fit the pawls (6) in the rope rotor from the rotor N Undo the screws and remove the
N Place the washer (5) on the starter N Install the fan housing spring housing
post N Set master control lever to STOP or N Carefully pry out the broken pieces
N Press the spring clip (4) on to the 0 and press the remaining rope into of spring with a screwdriver
starter post and over the pegs of the the handle – until the nipple is flush N Apply a few drops of non-resinous
pawls with a screwdriver or suitable with the handle oil to the new replacement spring
pliers - note position of spring clip
Replacing broken rewind spring
Tension the rewind spring
N Remove the rope rotor - see section
"Replacing torn starter rope"
213BA022 KN
WARNING
The broken pieces of spring may still be
under tension and can spring apart
Position the replacement spring
2411BA038 KN
unexpectedly on removal – risk of injury! N
Wear a face shield and protective with frame in the fan housing – the
gloves. anchor loop (arrow) must be located
over the retaining lug in the fan
N Make a loop in the unwound starter housing
rope and use it to turn the rope rotor N Apply suitable tools (screwdriver,
six full revolutions in the direction of punch, etc. ) to the recesses and
the arrow push the spring into its seat in the
N Hold the rope rotor tight – pull out fan housing – the spring slides out of
the twisted rope and untangle it the frame holder.
N Release the rope rotor N Remove spring housing, reinstall
the rope rotor, tension the rewind
N Slowly let go of the rope so that it spring, replace the fan housing and
winds on to the rotor. The starter screw it into place
grip must be drawn firmly into the
GS 461 25English
N Check guide bar for uneven wear
Storing the Machine Taking Care of the Guide Bar (ridge offset)
N Flip the guide bar, if necessary
If the machine is to remain out of use for remove the bore of the guide bar
approx. 3 months or more with guide bar straightener
N Drain and clean the fuel tank in a
2
well ventilated place
N Dispose of fuel in accordance with
the regulations and having regard
for the environment
N Run the engine until the carburetor
is dry, this helps to prevent the
carburetor diaphragms sticking
together
N Remove, clean and dry diamond
abrasive chain and guide bar, and
spray with STIHL multispray – in
2411BA028 KN
particular the bearing of the 1
sprocket nose – corrosion 3
protection.
N Thoroughly clean the machine - pay N Flip the guide bar – each time the
special attention to the cylinder fins chain is changed – to avoid uneven
and air filter wear, especially at the sprocket
N Store machine in a safe and dry nose and on the bottom
place. Protect against unauthorized N Periodically clean the water inlet
use (e. g., by children) hole (1), water outlet channel (2)
and bar groove (3)
N Measure groove depth – using the
measuring tool on the file gauge
(special accessory) – in the area
with the greatest wear
If the groove is not at least 6 mm deep:
N Replace guide bar
Otherwise the drive links will grind
against the base of the groove – tie
straps will not lie against the bar.
If the guide bar runs in the cut:
26 GS 461English
Installing the clutch drum
Checking and Replacing the
Chain Sprocket 3 N Clean crankshaft stub and needle
N Remove chain sprocket cover, 2 cage and lubricate with STIHL
diamond abrasive chain and guide lubricant (special accessory)
bar
1
2411BA041 KN
N Slip the needle cage onto the
crankshaft stub.
Replacing rim sprocket
N Fit clutch drum
N Remove cap (1)
N Fit rim sprocket
N Remove rim sprocket (2)
N Refit washer and E-clip on the
N Inspect transport profile on the crankshaft
clutch drum (3) – if there are also
N Fit cap
heavy signs of wear, also replace
the clutch drum (3)
2411BA040 KN
Installing rim sprocket
N Fit rim sprocket (2)
– If the diamond abrasive chain is
N Fit cap (1)
being replaced, also replace the rim
sprocket
Replacing clutch drum
– If the wear marks (arrows) are
deeper than 0.5 mm – otherwise the
service life of the diamond abrasive
chain is reduced – use check gauge
(special accessory) to test 5
Using two diamond abrasive chains in 6 4
alternation helps preserve the chain 32
sprocket. 1 2411BA042 KN
Removing rim sprocket
If only the rim sprocket is removed, the
N Remove cap (1)
clutch drum does not need to be
removed. N Remove rim sprocket (4)
N Use a screwdriver to remove the E-
clip (2)
N Remove washer (3)
N Remove clutch drum (5) with needle
cage (6) from the crankshaft
GS 461 27English
Maintain and sharpen
diamond abrasive chain
Maintaining the diamond abrasive chain
After finishing work:
N Remove diamond abrasive chain
and guide bar
N Rinse diamond abrasive chain and
guide bar with water
N Dry diamond abrasive chain and
guide bar
N Spray diamond abrasive chain and
guide bar with STIHL multispray – in
particular the bearing of the
sprocket nose – corrosion
protection
Check diamond abrasive chain regularly
N Check the diamond abrasive chain
for cracks and damaged rivets
N Replace damaged or worn chain
components – contact a servicing
dealer
Never use a dull or damaged diamond
abrasive chain – this leads to increased
physical strain, increased vibration load,
unsatisfactory results and increased
wear.
If cutting performance begins to
deteriorate, check the sharpness of the
diamond abrasive chain, resharpen as
needed. To do this, briefly cut through
abrasive material, e. g., sandstone,
aerated concrete or asphalt.
28 GS 461English
Maintenance and Care
The following information applies under normal operating conditions. The specified intervals must be
shortened accordingly when working for longer than normal or under difficult cutting conditions
at the end of work and/or
whenever tank is refilled
(extensive dust, etc.).
before starting work
as required
if damaged
monthly
if faulty
weekly
yearly
daily
visual inspection (condition, leaks) X X
Complete machine
clean X
Throttle trigger, throttle trigger lockout, master con-
Checking operation X X
trol lever
check X
Fuel pickup body in fuel tank
replace X X X
Fuel tank clean X
Water supply, chain lubrication check X
check, pay attention to sharpness X X
Check chain tension, retension if necessary; also
check every 15 minutes while working, retension X X
Diamond abrasive chain if necessary
sharpen X
clean and spray with STIHL multispray X
check (wear, damage, action of sprocket nose) X
clean and spray with STIHL multispray X
Guide bar flip X
deburr X
replace X X
Chain sprocket check, replace if necessary X3) X X
clean X X
Air filter
replace X
check X X
Antivibration elements
have them replaced by a specialist dealer1) X
Cooling air intake slits clean X
GS 461 29English
The following information applies under normal operating conditions. The specified intervals must be
shortened accordingly when working for longer than normal or under difficult cutting conditions
at the end of work and/or
whenever tank is refilled
(extensive dust, etc.).
before starting work
as required
if damaged
monthly
if faulty
weekly
yearly
daily
Cylinder fins clean X X
Check idle adjustment – chain must not rotate X X
Carburetor
Set the idle speed X
adjust electrode gap X
Spark plug
replace after 100 hours’ operation
All accessible screws, nuts and bolts (not adjusting
retighten X
screws)2)
Spark arresting screen (present only in some check1) X
countries) clean or replace if necessary1) X
decarbonise after 139 hours of operation, subse-
Exhaust bore X
quently after every 150 hours of operation
Safety information labels replace X
1)
STIHL recommends STIHL servicing dealers
2)
During initial use, tighten the cylinder block screws after 10 to 20 hours of operation
3) If diamond abrasive chain is mounted or changed
30 GS 461English
Main Parts
1 Screw Plug
2 Spark Plug Boot
3 Carburetor Adjusting Screws
4 Water Attachment
5 Chain Sprocket Cover
6 Chain Sprocket
2 7 Chain Tensioner
1 #
9 8 Guide Bar
3 9 Diamond Abrasive Chain
10 Muffler (with Spark Arresting
Screen)
8 11 Front Hand Guard
4 7 12 Front Handle (Handlebar)
5 13 Decompression Valve –
(Automatically Closing)
14 Starter Grip
15 Fuel Filler Cap
16 Master Control Lever
12 17 Throttle Trigger
11
18 Throttle Trigger Lockout
13 19 Rear Handle
20 Rear Hand Guard
14 # Serial Number
10 15
16 18
17 19
2411BA043 KN
20
GS 461 31English
Definitions 12 Front Handle (Handlebar) Anti-Vibration System
Handlebar for the left hand at the The anti-vibration system includes a
1 Screw Plug front of the machine. number of anti-vibration elements
designed to reduce the
For removing filter cover. 13 Decompression Valve –
transmission of vibrations created
(Automatically Closing)
2 Spark Plug Boot by the engine and cutting
Temporarily releases compression attachment to the operator's hands.
Connects the spark plug with the pressure to make starting easier –
ignition lead. (not illustrated)
when activated.
3 Carburetor Adjusting Screws 14 Starter Grip
For tuning the carburetor. The grip of the pull starter, for
4 Water Attachment starting the engine.
For connection of water supply. 15 Fuel Filler Cap
5 Chain Sprocket Cover For closing the fuel tank.
Covers the sprocket. 16 Master Control Lever
6 Chain Sprocket Lever for choke control, starting
The toothed wheel that drives the throttle, run and stop switch
diamond abrasive chain. position.
7 Chain Tensioner 17 Throttle Trigger
Permits precise adjustment of chain Controls the speed of the engine.
tension. 18 Throttle Trigger Lockout
8 Guide Bar Must be depressed before the
Supports and guides the diamond throttle trigger can be activated.
abrasive chain. 19 Rear Handle
9 Diamond Abrasive Chain The support handle for the right
A loop consisting of diamond hand.
segments, tie straps and drive links. 20 Rear Hand Guard
10 Muffler (with Spark Arresting Gives added protection to
Screen) operator's right hand.
Muffler reduces engine exhaust Guide Bar Nose
noise and diverts exhaust gases The exposed end of the guide bar.
away from operator. (not illustrated)
Spark arresting screen is designed
to reduce the risk of sparks. Clutch
11 Front Hand Guard Couples engine to chain sprocket
when engine is accelerated beyond
Helps prevent left hand from idle speed. (not illustrated)
touching the chain if it slips off the
handlebar.
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