Stihl FS 460 C-M User manual

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STIHL FS 460 C-M K Instruction Manual
Notice d’emploi

GInstruction Manual
1 - 40
FNotice d’emploi
41 - 83

Original Instruction ManualPrinted on chlorine-free paper
Printing inks contain vegetable oils, paper can be recycled.
© ANDREAS STIHL AG & Co. KG, 2011 0458-748-8221-B. VA0.M11. 0000003948_006_GB
FS 460 C-M K
English
1
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Contents
Dear Customer,
Thank you for choosing a quality
engineered STIHL product.
This machine has been built using
modern production techniques and
comprehensive quality assurance.
Every effort has been made to ensure
your satisfaction and troublefree use of
the machine.
Please contact your dealer or our sales
company if you have any queries
concerning your machine.
Your
Hans Peter Stihl
Guide to Using this Manual 2
Safety Precautions and Working
Techniques 2
Approved Combinations of Cutting
Attachment, Deflector, Limit Stop
and Harness 9
Mounting the Bike Handle 10
Adjusting the Throttle Cable 12
Mounting the Deflector 13
Mounting the Cutting Attachment 13
Fuel 14
Fueling 15
Fitting the Full Harness 18
Balancing the Trimmer/Brushcutter 18
Starting / Stopping the Engine 18
Operating Instructions 20
Air filter 21
Engine Management 22
M-Tronic 22
Winter Operation 22
Spark Plug 24
Engine Running Behavior 25
Replacing the Starter Rope and
Rewind Spring 25
Storing the Machine 29
Sharpening Metal Cutting Blades 29
Inspection and Maintenance by
User 30
Inspections and Maintenance by
Dealer 31
Maintenance and Care 33
Main Parts 35
Specifications 37
Special Accessories 37
Maintenance and Repairs 38
STIHL Limited Emission Control
Warranty Statement 38

FS 460 C-M K
English
2
Pictograms
The meanings of the pictograms
attached to the machine are explained in
this manual.
Depending on the model concerned, the
following pictograms may be attached to
your machine.
Symbols in text
Warning where there is a risk of an
accident or personal injury or serious
damage to property.
Caution where there is a risk of
damaging the machine or its individual
components.
Engineering improvements
STIHL's philosophy is to continually
improve all of its products. For this
reason we may modify the design,
engineering and appearance of our
products periodically.
Therefore, some changes, modifications
and improvements may not be covered
in this manual.
Observe all application local safety
regulations, standards and ordinances.
If you have not used this type of power
tool before: Have your dealer or other
experienced user show you how to
operate your power tool or attend a
special course in its operation.
Minors should never be allowed to use a
power tool.
Keep bystanders, especially children,
and animals away from the work area.
When the power tool is not in use, shut it
off so that it does not endanger others.
Secure it against unauthorized use.
The user is responsible for avoiding
injury to third parties or damage to their
property.
Guide to Using this Manual
Fuel tank; fuel mixture of
gasoline and engine oil
Operate decompression
valve
Manual fuel pump
Operate manual fuel
pump
Tube of grease
Intake air: Summer
operation
Intake air: Winter
operation
Handle heating
Safety Precautions and
Working Techniques
Some special safety pre-
cautions have to be
observed when working
with this power tool
because of the very high
speed of the cutting
attachment.
It is important you read
and understand the
instruction manual before
first use and keep the
manual in a safe place for
future reference. Non-
observance of the
instruction manual may
result in serious or even
fatal injury.

FS 460 C-M K
English
3
Do not lend or rent your power tool
without the instruction manual. Be sure
that anyone using it understands the
information contained in this manual.
The use of noise emitting power tools
may be restricted to certain times by
national or local regulations.
To operate the power tool you must be
rested, in good physical condition and
mental health.
If you have any condition that might be
aggravated by strenuous work, check
with your doctor before operating a
power tool.
Persons with pacemakers only: The
ignition system of your power tool
produces an electromagnetic field of a
very low intensity. This field may
interfere with some pacemakers. STIHL
recommends that persons with
pacemakers consult their physician and
the pacemaker manufacturer to reduce
any health risk.
Do not operate the power tool if you are
under the influence of any substance
(drugs, alcohol) which might impair
vision, dexterity or judgment.
Use the power tool for cutting wild
growth, shrubs, scrub, bushes, small
trees and similar material up to a
diameter of 7 cm.
Do not use your power tool for any other
purpose because of the increased risk of
accidents.
Only use cutting attachments and
accessories that are explicity approved
for this power tool model by STIHL or
are technically identical. If you have any
questions in this respect, consult a
servicing dealer. Use only high quality
parts and accessories in order to avoid
the risk of accidents and damage to the
machine.
STIHL recommends the use of original
STIHL replacement parts. They are
specifically designed to match your
model and meet your performance
requirements.
Never attempt to modify your unit in any
way since this may increase the risk of
personal injury. STIHL excludes all
liability for personal injury and damage
to property caused while using
unauthorized attachments.
Do not use a pressure washer to clean
the power tool. The solid jet of water
may damage parts of the power tool.
The deflector on this power tool cannot
protect the operator from all objects
thrown by the cutting attachment
(stones, glass, wire, etc.). Such objects
may ricochet and then hit the operator.
Clothing and Equipment
Wear proper protective clothing and
equipment.
Avoid clothing that could get caught on
branches or brush or moving parts of the
machine. Do not wear a scarf, necktie or
jewelry. Tie up and confine long hair
(e.g. with a hair net, cap, hard hat, etc.).
Sturdy shoes with non-slip soles may be
worn as an alternative only when using
mowing heads.
A face shield alone does not provide
adequate eye protection.
Wear hearing protection, e.g. earplugs
or ear muffs.
STIHL offers a comprehensive range of
personal protective clothing and
equipment.
Clothing must be sturdy
but allow complete free-
dom of movement. Wear
snug-fitting clothing, an
overall and jacket combi-
nation, do not wear a
work coat.
Wear steel-toed safety
boots with non-slip soles.
Wear a safety hard hat
for thinning operations,
when working in high
scrub and where there is
a danger of head injuries
from falling objects. To
reduce the risk of injury
from thrown objects,
always wear a face shield
and safety glasses.
Wear heavy-duty gloves.

FS 460 C-M K
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4
Transporting the Power Tool
Always stop the engine.
Carry the unit hanging from the shoulder
strap or properly balanced by the drive
tube. Fit transport guard on metal cutting
attachments to avoid the risk of injury
from blade contact
Transporting in a vehicle: Properly
secure your power tool to prevent
turnover, fuel spillage and damage.
Fueling
Always shut off the engine before
refueling.
Do not fuel a hot engine – fuel may spill
and cause a fire.
Open the fuel cap carefully to allow any
pressure build-up in the tank to release
slowly and avoid fuel spillage.
Fuel your power tool only in well-
ventilated areas. If you spill fuel, wipe
the machine immediately – if fuel gets on
your clothing, change immediately.
Your power tool comes standard with
either a screw-type or bayonet-type fuel
cap.
This reduces the risk of unit vibrations
causing the fuel cap to loosen or come
off and spill quantities of fuel.
To reduce the risk of serious or fatal
burn injuries, check for fuel leakage. If
fuel leakage is found, do not start or run
the engine until leak is fixed.
Before Starting
Check that your power tool is properly
assembled and in good condition – refer
to appropriate chapters in the instruction
manual.
–Use only an approved combination
of cutting attachment, deflector,
handle and harness. All parts must
be assembled properly and
securely.
–The stop switch must move freely.
–Smooth action of choke knob,
throttle trigger lockout and throttle
trigger – the throttle trigger must
return automatically to the idle
position. The choke knob must
spring back from the } position to
the run position F when the throttle
trigger lockout and throttle trigger
are squeezed.
–Check that the spark plug boot is
secure – a loose boot may cause
arcing that could ignite combustible
fumes and cause a fire.
–Cutting tool or attachment: Check
for correct and secure assembly
and good condition.
–Check protective devices (e.g.
deflector for cutting attachment,
rider plate) for damage or wear.
Always replace damaged parts. Do
not operate your machine with a
damaged deflector or worn rider
plate (lettering and arrows no longer
legible).
–Never attempt to modify the controls
or safety devices in any way.
To reduce the risk of seri-
ous burn injuries, avoid
touching hot parts of the
machine, including the
gearbox housing.
Gasoline is an extremely
flammable fuel. Keep
clear of naked flames. Do
not spill any fuel – do not
smoke.
002BA479 KN
After fueling, tighten
down the screw-type fuel
cap as securely as
possible.
After fueling, insert the
fuel cap with hinged grip
(bayonet-type cap) cor-
rectly in the opening, turn
it clockwise as far as stop
and fold the grip down.

FS 460 C-M K
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5
–Keep the handles dry and clean –
free from oil and dirt – for safe
control of the power tool.
–Adjust the harness and handle(s) to
suit your height and reach. See
chapters on "Fitting the Harness"
and "Balancing the Unit".
To reduce the risk of personal injury, do
not operate your power tool if it is
damaged or not properly assembled.
If you use a shoulder strap or full
harness: Practice removing and putting
down the machine as you would in an
emergency. To avoid damage, do not
throw the machine to the ground when
practicing.
Starting the Engine
Start the engine at least 3 meters from
the fueling spot, outdoors only.
Place the unit on firm ground in an open
area. Make sure you have good balance
and secure footing. Hold the unit
securely. The cutting attachment must
be clear of the ground and all other
obstructions because it may begin to run
when the engine starts.
Your power tool is a one-person unit. To
reduce the risk of injury from thrown
objects, do not allow other persons
within a radius of 15 meters of your own
position – even when starting.
To reduce the risk of fire, keep hot
exhaust gases and hot muffler away
from easily combustible materials (e.g.
wood chips, bark, dry grass, fuel).
Holding and Controlling the Power Tool
Always hold the power tool firmly with
both hands on the handles.
Make sure you always have good
balance and secure footing.
Right handle on control handle, left hand
on left handle.
During Operation
Make sure you always have good
balance and secure footing.
In the event of imminent danger or in an
emergency, press the stop switch to
shut off the engine.
To reduce the risk of injury, do not allow
any other persons within a radius of 15
meters of your own position. To reduce
the risk of damage to property, also
maintain this distance from other objects
(vehicles, windows).
The correct engine idle speed is
important to ensure that the cutting
attachment stops rotating when you let
go of the throttle trigger. If the cutting
attachment continues to rotate when the
engine is idling, have the machine
checked by your servicing dealer. STIHL
recommends a STIHL servicing dealer.
Take special care in slippery conditions
– damp, snow, ice, on slopes or uneven
ground.
Watch out for obstacles: Roots, tree
stumps or holes which could cause you
to trip or stumble.
Always stand on the ground while
working, never on a ladder, work
platform or any other insecure support.
Be particularly alert and cautious when
wearing hearing protection because
your ability to hear warnings (shouts,
alarms, etc.) is restricted.
To reduce the risk of accidents, take a
break in good time to avoid tiredness or
exhaustion.
To reduce the risk of
injury, avoid contact with
the cutting attachment.
Do not drop start the
power tool – start the
engine as described in
the instruction manual.
Note that the cutting
attachment continues to
run for a short period
after you let go of the
throttle trigger – flywheel
effect.
002BA486 KN
15m (50ft)

FS 460 C-M K
English
6
Work calmly and carefully – in daylight
conditions and only when visibility is
good. Stay alert so as not to endanger
others.
To reduce the risk of serious or fatal
injury from breathing toxic fumes,
ensure proper ventilation when working
in trenches, hollows or other confined
locations.
To reduce the risk of accidents, stop
work immediately in the event of
nausea, headache, visual disturbances
(e.g. reduced field of vision), problems
with hearing, dizziness, deterioration in
ability to concentrate. Apart from other
possibilities, these symptoms may be
caused by an excessively high
concentration of exhaust gases in the
work area.
Operate your power tool so that it
produces a minimum of noise and
emissions – do not run the engine
unnecessarily, accelerate the engine
only when working.
To reduce the risk of fire, do not smoke
while operating or standing near your
power tool. Note that combustible fuel
vapor may escape from the fuel system.
The dusts, vapor and smoke produced
during operation may be dangerous to
health. If the work area is very dusty or
smoky, wear a respirator.
If your power tool is subjected to
unusually high loads for which it was not
designed (e.g. heavy impact or a fall),
always check that it is in good condition
before continuing work – see also
"Before Starting".
Check the fuel system in particular for
leaks and make sure the safety devices
are working properly. Do not continue
operating your power tool if it is
damaged. In case of doubt, have the unit
checked by your servicing dealer.
Special care must be taken when
working in difficult, over-grown terrain.
When cutting high scrub, under bushes
and hedges: Keep cutting attachment at
minimum height of 15 cm to avoid
harming small animals.
Always shut off the engine before
leaving the unit unattended.
Check the cutting attachment at regular
short intervals during operation or
immediately if there is a noticeable
change in cutting behavior:
–Turn off the engine. Hold the unit
firmly and wait for the cutting
attachment to come to a standstill.
–Check condition and tightness, look
for cracks.
–Check sharpness.
–Replace damaged or dull cutting
attachments immediately, even if
they have only superficial cracks.
Clean grass and plant residue off the
cutting attachment mounting at regular
intervals – remove any build up of
material from the cutting attachment and
deflector.
To reduce the risk of injury, shut off the
engine before replacing the cutting
attachment.
Do not continue using or attempt to
repair damaged or cracked cutting
attachments by welding, straightening or
modifying the shape (out of balance).
This may cause parts of the cutting
attachment to come off and hit the
operator or bystanders at high speed
and result in serious or fatal injuries.
Your power tool produces
toxic exhaust fumes as
soon as the engine is
running. These fumes
may be colorless and
odorless and contain
unburned hydrocarbons
and benzol. Never run
the engine indoors or in
poorly ventilated loca-
tions, even if your model
is equipped with a cata-
lytic converter.
To reduce the risk
of injuryfrom
thrown objects,
never operate the
unit without the
proper deflector for
the type of cutting
attachment being
used.
Inspect the work area:
Stones, pieces of metal
or other solid objects can
be thrown and cause per-
sonal injury or damage
the cutting attachment
and property (e.g. parked
vehicles, windows).
The gearbox becomes
hot during operation. To
reduce the risk of burn
injury, do not touch the
gearbox housing.

FS 460 C-M K
English
7
When using metal cutting attachments
STIHL recommends the use of original
STIHL metal cutting attachments. They
are specifically designed to match your
model and meet your performance
requirements.
Metal cutting attachments rotate at very
high speed. The forces that occur act on
the machine, the attachment and the
material being cut.
Sharpen metal cutting attachments
regularly as specified.
Unevenly sharpened metal cutting
attachments cause out-of-balance
which can impose extremely high loads
on the machine and increase the risk of
breakage.
Dull or improperly sharpened cutting
edges can put a higher load on the
cutting attachment and increase the risk
of injuryfrom cracked or broken parts.
Inspect metal cutting attachments for
cracks or warping after every contact
with hard objects (e.g. stones, rocks,
pieces of metal). To reduce the risk of
injury, remove burrs and other visible
build-ups of material (use a file) because
they may become detached and be
thrown at high speed during operation.
To reduce the above-mentioned risks
when using a metal cutting attachment,
never use a metal cutting attachment
with a diameter larger than specified. It
must not be too heavy. It must be
manufactured from materials of
adequate quality and its geometry must
be correct (shape, thickness).
To reduce the risk of injury, a metal
cutting attachment not manufactured by
STIHL must not be heavier, thicker,
have a different shape or a diameter
larger than the largest metal cutting
attachment approved by STIHL for this
power tool model.
Vibrations
Prolonged use of the power tool may
result in vibration-induced circulation
problems in the hands (whitefinger
disease).
No general recommendation can be
given for the length of usage because it
depends on several factors.
The period of usage is prolonged by:
–Hand protection (wearing warm
gloves)
–Work breaks
The period of usage is shortened by:
–Any personal tendency to suffer
from poor circulation (symptoms:
frequently cold fingers, tingling
sensations).
–Low outside temperatures.
–The force with which the handles
are held (a tight grip restricts
circulation).
Continual and regular users should
monitor closely the condition of their
hands and fingers. If any of the above
symptoms appear (e.g. tingling
sensation in fingers), seek medical
advice.
Maintenance and Repairs
Service the machine regularly. Do not
attempt any maintenance or repair work
not described in the instruction manual.
Have all other work performed by a
servicing dealer.
STIHL recommends that you have
servicing and repair work carried out
exclusively by an authorized STIHL
servicing dealer. STIHL dealers are
regularly given the opportunity to attend
training courses and are supplied with
the necessary technical information.
Only use high-quality replacement parts
in order to avoid the risk of accidents
and damage to the machine. If you have
any questions in this respect, consult a
servicing dealer.
STIHL recommends the use of 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
adjustments.
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 intervals.

FS 460 C-M K
English
8
Use only a spark plug of the type
approved by STIHL and make sure it is
in good condition – see "Specifications".
Inspect the ignition lead (insulation in
good condition, secure connection).
Check the condition of the muffler.
To reduce the risk of fire and damage to
hearing, do not operate your machine if
the muffler is damaged or missing. –
Do not touch a hot muffler since burn
injury will result.
Vibration behavior is influenced by the
condition of the AV elements – check the
AV elements at regular intervals.
Maintenance, replacement, or repair of
the emission control devices and
systems may be performed by any
nonroad engine repair establishment or
individual. However, if you make a
warranty claim for a component which
has not been serviced or maintained
properly or if nonapproved replacement
parts were used, STIHL may deny
coverage.
For any maintenance please refer to the
maintenance chart and to the warranty
statement near the end of the instruction
manual.
Symbols on Deflectors
An arrow on the limit stop shows the
correct direction of rotation of the cutting
attachments.
Harness
The harness is included with the
machine or available as a special
accessory.
NUse the harness.
NWith the engine running, attach the
machine to the harness.
Circular saw blades must always be
used in combination with a full harness
with a quick-release system.
Circular Saw Blade
Suitable for cutting shrubs and trees with
a maximum stem diameter of 7 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.
To reduce the risk of blade damage,
avoid contact with stones and the
ground. Resharpen the blade properly in
good time – dull teeth may result in the
blade cracking and shattering and
causing serious injury.
When felling, maintain a distance of at
least two tree lengths from the next
felling site.
Risk of kickout
The risk of kickout is highest in the black
area of the blade: Do not use this area of
the circular saw blade for cutting.
There is also a risk of kickout when
using the lighter shaded areas of the
blade: These areas of the blade should
only be used by experienced operators
with specialized training.
STIHL recommends that you use the
non-shaded area of the circular saw
blade. Always start the cut with this area
of the blade.
002BA397 KN
002BA449 KN

FS 460 C-M K
English
9
Permissible combinations
Choose the proper combination from the
table depending on the cutting
attachment!
For safety reasons only the cutting
attachments and deflectors and/or limit
stops within one line of the table may be
combined with one another. Other
combinations are not permissible – risk
of accident!
Cutting attachments
Metal cutting attachments
1Circular saw blade 200 scratcher
tooth
2Circular saw blade 200 chisel tooth
3Circular saw blade 225 scratcher
tooth
4Circular saw blade 225 chisel tooth
5Circular saw blade 225 (carbide-
tipped)
Circular saw blades of other, non-metal
materials must not be used.
Deflectors / limit stops
6Limit stop for circular saw blades
200
7Limit stop for circular saw blades
225
Harnesses
8Full harness must be used
Approved Combinations of Cutting Attachment, Deflector, Limit Stop and Harness
Cutting attachment Deflector / limit stop Harness
681BA169 KN
126
8
3457

FS 460 C-M K
English
10
Mounting the bike handle with swiveling
handle support
The machine is supplied with the clamp
moldings (1) mounted to the
handlebar (2).
Mounting the control handle
NTake out the screw (3) and remove
the nut (4) from the control
handle (5).
NLine up the control handle (5)
relative to the handlebar (2): The
throttle trigger (6) must point toward
the gearbox and the clamp
screw (7) toward the engine.
NHolding the control handle (5) in
that position, push it on to the end of
the handlebar (2) and line up the
holes (8).
NFit the nut (4) in the control
handle (5), insert the screw (3) and
tighten it down firmly.
Assembling the handle support
Assembly of the swivelling handle
support involves equipping the clamp
moldings with a spring and mounting
them on the handle support.
Mounting the Bike Handle
21
4BA011 KN
3
4
5
002BA352 KN
7
5
4BA002 KN
6
2
8
6BA019 KN
2
8
3
5
4

FS 460 C-M K
English
11
NUse the spring (9) from the parts kit
supplied with the machine.
NPlace the spring (9) in the lower
clamp molding (10).
NPosition the clamp moldings (1) with
handlebar (2) on the handle
support (11).
NRaise the grip of the wing screw (7)
to the upright position.
NTurn the wing screw
counterclockwise as far as stop.
NPush the wing screw into the handle
support as far as stop and then
screw it down – but do not finally
tighten yet.
NAdjust the handlebar (2) so that
distance A is no more than 15 cm.
NLine up the handlebar at a right
angle to the drive tube.
NTurn the wing screw clockwise as
far as stop.
NFold the grip of the wing screw down
so that it is flush.
Adjusting the handlebar
Opening the wing screw
NRaise the grip of the wing screw to
the upright position.
NTurn the wing screw
counterclockwise until the handle
support can be moved.
4BA001 KN
9
10
11
1
4BA012 KN
2
A
2
4BA003 KN
7
4BA005 KN
4BA006 KN
4BA013 KN
4BA004 KN

FS 460 C-M K
English
12
NMove the handlebar to the required
position.
Closing the wing screw
NTurn the wing screw clockwise as
far as stop.
NFold the grip of the wing screw down
so that it is flush.
Swiveling the handlebar
Transport position
NLoosen the wing screw (7) and
unscrew it until the handlebar (2)
can be turned clockwise.
NTurn the handlebar 90° and then
swing the handles down.
NTighten down the wing screw (7)
firmly.
Working position
NReverse the sequence described
above to swing the handles up and
turn the handlebar
counterclockwise.
Correct adjustment of the throttle cable
is a preconditon for correct operation of
the machine in all modes, from starting
to full throttle.
It may be necessary to readjust the
throttle cable after assembling the
machine or after a prolonged period of
operation.
–The throttle cable can checked and
adjusted by the user: see
"Inspection and Maintenance by
User".
–The throttle cable can be checked
and adjusted by your dealer. Have
the machine repaired by your
servicing dealer. STIHL
recommends a STIHL servicing
dealer.
4BA007 KN
4BA005 KN
4BA006 KN
2
7
4BA008 KN
Adjusting the Throttle Cable

FS 460 C-M K
English
13
Use the Right Deflector
The limit stop is approved only for use
with circular saw blades. It must not be
used in combination with other cutting
attachments.
Mounting the Limit Stop
NRemove dirt from joints on gearbox
and limit stop – make sure that no
dirt gets into the screw holes in the
gearbox.
NPlace the limit stop (1) on the
gearbox (2).
NInsert the screws (3) and tighten
them down firmly.
Preparations
NLay your power tool on its back so
that the cutting attachment
mounting face is pointing up.
Fitting the Thrust Plate
NSlip the thrust plate (1) over the
shaft (2).
Your power tool comes from the factory
with a guard ring (3) and limit stop (4) for
circular saw blades.
The thrust plate (1) on the gearhead is
necessary for mounting circular saw
blades.
Cleaning Gearbox Mounting Hardware
for Cutting Attachment
Check inside of guard ring (3) and area
around it for dirt at regular intervals and
clean if necessary as follows:
NPull the thrust plate (1) off the shaft.
NThoroughly clean the guard ring (3),
shaft (2) and thrust plate (1) – do not
remove the guard ring.
Mounting the Cutting Attachment
Use a limit stop that matches the circular
saw blade – see "Mounting the
Deflector".
Mounting Circular Saw Blades
The cutting edges of circular saw blades
must point clockwise.
A limit stop kit, which includes a limit
stop and a guard ring for circular saw
blades, is available as a special
accessory for mounting circular saw
blades.
Mounting the Deflector
002BA428 KN
002BA429 KN
3
2
1
Mounting the Cutting
Attachment
002BA406 KN
4
002BA430 KN
3
1
2
681BA165 KN

FS 460 C-M K
English
14
NPlace the circular saw blade (1) in
position.
Collar (a) must locate in the saw blade's
mounting hole (b).
NFit the thrust washer (2) – convex
side must face up.
NFit the rider plate (3).
NBlock the drive shaft.
NScrew on the nut (4)
counterclockwise and tighten it
down firmly.
If the mounting nut turns too freely, fit a
new one.
Remove the tool used to block the shaft.
Removing the Circular Saw Blade
NBlock the drive shaft.
NUnscrew the mounting nut
clockwise.
Remove the tool used to block the shaft.
This engine is certified to operate on
unleaded gasoline and with the mix ratio
50:1.
Your engine requires a mixture of high-
quality premium gasoline and high-
quality two-stroke air-cooled engine oil.
Use premium branded unleaded
gasoline with a minimum octane rating
of 89 RON.
Note: Models equipped with a catalytic
converter require unleaded gasoline. A
few tankfuls of leaded gasoline can
reduce the efficiency of the catalytic
converter by more than 50%.
Fuel with a lower octane rating may
result in preignition (causing "pinging")
which is accompanied by an increase in
engine temperature. This, in turn,
increases the risk of the piston seizure
and damage to the engine.
The chemical composition of the fuel is
also important. Some fuel additives not
only detrimentally affect elastomers
(carburetor diaphragms, oil seals, fuel
lines etc.), but magnesium castings as
well. This could cause running problems
or even damage the engine. For this
reason it is essential that you use only
high-quality fuels!
Fuels with different percentages of
ethanol are being offered. Ethanol can
affect the running behaviour of the
engine and increase the risk of lean
seizure.
2
3
1
4
002BA431 KN
b
a
Fuel

FS 460 C-M K
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15
Gasoline with an ethanol content of
more than 10% can cause running
problems and major damage in engines
with a manually adjustable carburetor
and should not be used in such engines.
Engines equipped with M-Tronic can be
run on gasoline with an ethanol content
of up to 25% (E25).
Use only STIHL two-stroke engine oil or
equivalent high-quality two-stroke air-
cooled engine oils for mixing.
We recommend STIHL 50:1 two-stroke
engine oil since it is specially formulated
for use in STIHL engines.
Do not use BIA or TCW (two-stroke
water cooled) mix oils!
Use only STIHL 50:1 heavy-duty engine
oil or an equivalent quality two-stroke
engine oil for the fuel mix in models
equipped with a catalytic converter.
Take care when handling gasoline.
Avoid direct contact with the skin and
avoid inhaling fuel vapour.
The canister should be kept tightly
closed in order to avoid any moisture
getting into the mixture.
The fuel tank and the canister in which
fuel mix is stored should be cleaned
from time to time.
Fuel mix ratio
Only mix sufficient fuel for a few days
work, not to exceed 3 months of storage.
Store in approved safety fuel-canisters
only. When mixing, pour oil into the
canister first, and then add gasoline.
Dispose of empty mixing-oil canisters
only at authorized disposal locations.
Fuel Filler Cap
When fueling on a slope, always position
the machine with the filler cap facing
uphill.
NPlace the machine on level ground
so that the filler cap is facing up.
NBefore fueling, clean the filler cap
and the area around it to ensure that
no dirt falls into the tank.
A number of different filler caps are
installed as standard at the factory.
Threaded filler cap
Examples
Gasoline Oil (STIHL 50:1 or equiva-
lent high-quality oils)
liters liters (ml)
10.02(20)
5 0.10 (100)
10 0.20 (200)
15 0.30 (300)
20 0.40 (400)
25 0.50 (500)
Fueling
2709BA000 KN
2709BA001 KN

FS 460 C-M K
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16
Cliplock filler cap (bayonet-type)
Opening screw-type tank cap
NTurn the cap counterclockwise until
it can be removed from the tank
opening.
NRemove the cap.
Filling up with fuel
Take care not to spill fuel while fueling
and do not overfill the tank.
STIHL recommends you use the STIHL
filler nozzle for fuel (special accessory).
NFilling up with fuel
Closing screw-type tank cap
NPlace the cap in the opening.
NTurn the cap clockwise as far as
stop and tighten it down as firmly as
possible by hand.
Opening tank cap with hinged grip
NSwing the grip to the upright
position.
NRotate the cap about 1/4 turn
counterclockwise.
NRemove the cap.
Filling up with fuel
Take care not to spill fuel while fueling
and do not overfill the tank.
STIHL recommends you use the STIHL
filler nozzle for fuel (special accessory).
NFilling up with fuel
Closing tank cap with hinged grip
Grip must be vertical:
NFit the cap in the opening – the
marks on the cap and filler neck
must line up.
NPress the cap down as far as stop.
2709BA002 KN
2709BA003 KN
2709BA004 KN
2709BA005 KN
2709BA006 KN
2709BA007 KN
2709BA008 KN

FS 460 C-M K
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NWhile holding the cap depressed,
turn it clockwise until it engages in
position.
NFold the grip flush with the top of the
cap.
Checking tank cap with hinged grip is
properly locked
–The lug on the grip must fully
engage the recess (arrow).
NGrip the cap – it is properly locked if
it cannot be turned or removed.
If tank cap with hinged grip can be
turned or removed
Bottom of cap is twisted in relation to
top:
NPlace the cap on the opening and
rotate it counterclockwise until it
engages the filler neck.
NContinue rotating the cap
counterclockwise (about a quarter
turn) – this causes the bottom of the
cap to be turned to the correct
position.
NTurn and lock the cap clockwise –
see sections on "Closing" and
"Checking security of cap".
2709BA009 KN
2709BA010 KN
2709BA011 KN
Left: Bottom of cap twisted
Right: Bottom of cap correctly
positioned
2709BA012 KN
2709BA013 KN
2709BA014 KN

FS 460 C-M K
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18
Fitting the full harness is described in
detail in the instruction sheet supplied.
NPut on the full harness (1).
NAdjust the length of the strap so that
the carabiner (2) is about a hand’s
width below your right hip.
NAttach the spring hook to the
machine's perforated strip (3).
Find the right attachment point for the
cutting attachment you are using – see
"Balancing the Brushcutter".
NWith the unit suspended from the
harness, see how it is balanced and
change attachment point as
necessary:
Circular Saw Blades
Circular saw blades should "hover"
about 20 cm above the ground.
Throwing off the machine in an
emergency
The machine must be quickly thrown off
in the event of imminent danger.
Practice removing and putting down the
machine as you would in an emergency.
To avoid damage, do not throw the
machine to the ground when practicing.
Controls
1Throttle trigger lockout
2Throttle trigger
3Stop switch with Run and Stop
positions. Depress the stop switch
(…) to switch off the ignition.
Function of stop switch and ignition
system
The stop switch is normally in the Run
position: Ignition is on in this position –
the engine is ready to start and may be
started. The ignition is switched off when
the stop switch is depressed. It is
automatically switched on again after
the engine comes to a standstill.
Fitting the Full Harness
3
002BA411 KN
1
2
Balancing the
Trimmer/Brushcutter
6BA010 KN
Starting / Stopping the
Engine
1
002BA484 KN
2
3