Stihl Operating instructions User manual

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STIHL FS 460 C-M
Warning!
Read and follow all safety
precautions in Instruction Manual –
improper use can cause serious or
fatal injury.
Advertencia!
Lea y siga todas las precauciones
de seguridad dadas en el manual
de instrucciones – el uso incorrecto
puede causar lesiones graves o
mortales.
Instruction Manual
Manual de instrucciones

Instruction Manual
1 - 47
Manual de
instrucciones
49 - 99

Original Instruction ManualPrinted on chlorine-free paper
Printing inks contain vegetable oils, paper can be recycled.
© ANDREAS STIHL AG & Co. KG, 2010 0458-746-8621-A. M0-4.L10.DDS. 0000003859_002_GB
FS 460 C-M, FS 460 C-M L
English
1
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Contents
Allow only persons who fully understand
this manual to operate your trimmer /
brushcutter.
To receive maximum performance and
satisfaction from your STIHL trimmer /
brushcutter, it is important that you read,
understand and follow the safety
precautions and the operating and
maintenance instructions in chapter
"Safety Precautions and Working
Techniques" before using your trimmer /
brushcutter. For further information you
can go to www.stihlusa.com.
Contact your STIHL dealer or the STIHL
distributor for your area if you do not
understand any of the instructions in this
manual.
Make sure your unit is equipped with the
proper deflector, handle and harness for
the type of cutting attachment being
used. Always wear proper eye
protection.
Guide to Using this Manual 2
Safety Precautions and Working
Techniques 3
Approved Combinations of Cutting
Attachment, Deflector, Limit Stop
and Harness 16
Mounting the Bike Handle 17
Mounting the Deflector 20
Mounting the Cutting Attachment 21
Fuel 24
Fueling 25
Fitting the Full Harness 26
Balancing the Trimmer/Brushcutter 27
Starting / Stopping the Engine 27
Operating Instructions 29
Cleaning the Air Filter 30
Engine Management 30
M-Tronic 31
Winter Operation 31
Spark Plug 32
Engine Running Behavior 34
Replacing the Starter Rope and
Rewind Spring 34
Storing the Machine 36
Sharpening Metal Cutting Blades 37
Inspection and Maintenance by
User 37
Inspections and Maintenance by
Dealer 38
Maintenance and Care 39
Main Parts 41
Specifications 43
Special Accessories 44
Maintenance and Repairs 44
STIHL Incorporated Federal
Emission Control Warranty
Statement 44
Trademarks 46
Warning!
Because a trimmer / brushcutter is a
high-speed cutting tool some special
safety precautions must be observed to
reduce the risk of personal injury. Care-
less or improper use may cause serious
or even fatal injury.

FS 460 C-M, FS 460 C-M L
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2
Pictograms
The meanings of the pictograms
attached to or embossed on the
machine are explained in this manual.
Depending on the model concerned, the
following pictograms may be on your
machine.
Symbols in Text
Many operating and safety instructions
are supported by illustrations.
The individual steps or procedures
described in the manual may be marked
in different ways:
NA bullet marks a step or procedure.
A description of a step or procedure that
refers directly to an illustration may
contain item numbers that appear in the
illustration. Example:
NLoosen the screw (1).
NLever (2) ...
In addition to the operating instructions,
this manual may contain paragraphs
that require your special attention. Such
paragraphs are marked with the
symbols and signal words described
below:
Engineering Improvements
STIHL’s philosophy is to continually
improve all of its products. As a result,
engineering changes and improvements
are made from time to time. Therefore,
some changes, modifications and
improvements may not be covered in
this manual. If the operating
characteristics or the appearance of
your machine differs from those
described in this manual, please contact
your STIHL dealer for assistance.
Guide to Using this Manual
Fuel tank for gasoline
and engine oil mixture
Press to operate decom-
pression valve
Manual fuel pump
Press to operate manual
fuel pump
Filler hole for gear
lubricant
Air intake summer mode
Air intake winter mode
Handle heating
Danger!
Indicates an imminent risk of severe or
fatal injury.
Warning!
Indicates a hazardous situation which, if
not avoided, could result in severe or
fatal injury.
Caution!
Indicates a risk of property damage,
including damage to the machine or its
individual components.

FS 460 C-M, FS 460 C-M L
English
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The terminology utilized in this manual
when referring to the power tool reflects
the fact that different types of cutting
attachments may be mounted on it. The
term "trimmer" is used to designate an
FS unit that is equipped with a nylon line
head or a head with flexible plastic
blades (i.e., the PolyCut head). A
"brushcutter" designates a unit
equipped with a rigid metal blade. Many
FS models may be used as either a
trimmer or a brushcutter – therefore, the
power tool is referred in this manual as a
"trimmer / brushcutter." Some smaller
and / or lightweight FS models may only
be used as a trimmer, i.e., they may not
be used with metal blades.
The term "clearing saw" indicates a
high-powered trimmer / brushcutter that
is particularly suited for use with a
circular saw blade to clear saplings or
small trees.
Have your STIHL dealer show you how
to operate your power tool. Observe all
applicable local safety regulations,
standards and ordinances.
Use your clearing saw equipped with the
appropriate cutting attachment only for
cutting grass, brush, wood and similar
material.
Safety Precautions and
Working Techniques
Because a clearing saw
is a high-speed, fast-cut-
ting power tool
sometimes equipped with
sharp cutting blades,
special safety precau-
tions must be observed to
reduce the risk of per-
sonal injury.
It is important that you
read, fully understand
and observe the following
safety precautions and
warnings. Read the
instruction manual and
the safety precautions
periodically. Careless or
improper use may cause
serious or fatal injury.
Warning!
As more fully explained later in these
Safety Precautions, to reduce the risk of
personal injury, make sure your unit is
equipped with the proper deflector, limit
stop and harness for the type of cutting
attachment you are using. Use only cut-
ting attachments that are specifically
authorized by STIHL for use on your FS
model.
Warning!
Do not lend or rent your power tool with-
out the instruction manual. Be sure that
anyone using it understands the infor-
mation contained in this manual.
Warning!
The use of this machine may be hazard-
ous. If the rotating line or blade comes in
contact with your body, it will cut you.
When it comes in contact with solid for-
eign objects such as rocks or bits of
metal, it may fling them directly or by ric-
ochet in the direction of bystanders or
the operator. Striking such objects could
damage the cutting attachment and may
cause blades to crack, chip or break.
Thrown objects, including broken heads
or blades, may result in serious or fatal
injury to the operator or bystanders.
STIHL does not recommend the use of
rigid blades when cutting in stony areas.
Warning!
Do not use it for other purposes, since
misuse may result in personal injury or
property damage, including damage to
the machine.
Warning!
Minors should never be allowed to use
this power tool. Bystanders, especially
children, and animals should not be
allowed in the area where it is in use.

FS 460 C-M, FS 460 C-M L
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4
Most of these safety precautions and
warnings apply to the use of all STIHL
clearing saws. Different models may
have different parts and controls. See
the appropriate section of your
instruction manual for a description of
the controls and the function of the parts
of your model.
Safe use of a clearing saw involves
1. the operator
2. the power tool
3. the use of the power tool.
THE OPERATOR
Physical Condition
You must be in good physical condition
and mental health and not under the
influence of any substance (drugs,
alcohol, etc.) which might impair vision,
dexterity or judgment. Do not operate
this machine when you are fatigued.
These conditions reduce the hand's
ability to feel and regulate temperature,
produce numbness and burning
sensations and may cause nerve and
circulation damage and tissue necrosis.
All factors which contribute to
whitefinger disease are not known, but
cold weather, smoking and diseases or
physical conditions that affect blood
vessels and blood transport, as well as
high vibration levels and long periods of
exposure to vibration are mentioned as
factors in the development of whitefinger
disease. In order to reduce the risk of
whitefinger disease and carpal tunnel
syndrome, please note the following:
–Most STIHL power tools are
available with an anti-vibration
("AV") system designed to reduce
the transmission of vibrations
created by the machine to the
operator's hands. An AV system is
recommended for those persons
using power tools on a regular or
sustained basis.
–Wear gloves and keep your hands
warm.
–Keep the AV system well
maintained. A power tool with loose
components or with damaged or
worn AV elements will tend to have
higher vibration levels.
–Maintain a firm grip at all times, but
do not squeeze the handles with
constant, excessive pressure. Take
frequent breaks.
All the above-mentioned precautions do
not guarantee that you will not sustain
whitefinger disease or carpal tunnel
syndrome. Therefore, continual and
regular users should closely monitor the
condition of their hands and fingers. If
any of the above symptoms appear,
seek medical advice immediately.
Warning!
To reduce the risk of injury to bystand-
ers and damage to property, never let
your power tool run unattended. When it
is not in use (e.g. during a work break),
shut it off and make sure that unauthor-
ized persons do not use it.
Warning!
Be alert – if you get tired, take a break.
Tiredness may result in loss of control.
Working with any power tool can be
strenuous. If you have any condition
that might be aggravated by strenuous
work, check with your doctor before
operating this machine.
Warning!
Prolonged use of a power tool (or other
machines) exposing the operator to
vibrations may produce whitefinger dis-
ease (Raynaud's phenomenon) or
carpal tunnel syndrome.
Warning!
The ignition system of the STIHL unit
produces an electromagnetic field of a
very low intensity. This field may inter-
fere with some pacemakers. To reduce
the risk of serious or fatal injury, persons
with a pacemaker should consult their
physician and the pacemaker manufac-
turer before operating this tool.

FS 460 C-M, FS 460 C-M L
English
5
Proper Clothing
To reduce the risk of injury, the operator
should wear proper protective apparel.
Be particularly alert and cautious when
wearing hearing protection because
your ability to hear warnings (shouts,
alarms, etc.) is restricted.
Avoid loose-fitting jackets, scarfs,
neckties, jewelry, flared or cuffed pants,
unconfined long hair or anything that
could become caught on branches,
brush or the moving parts of the unit.
Secure hair so it is above shoulder level.
THE POWER TOOL
For illustrations and definitions of the
power tool parts see the chapter on
"Main Parts."
If this 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. Check in particular that
the fuel system is tight (no leaks) and
that the controls and safety devices are
working properly. Do not continue
operating this machine if it is damaged.
In case of doubt, have it checked by your
STIHL servicing dealer.
THE USE OF THE POWER TOOL
Transporting the Power Tool
Warning!
The deflector provided with your power
tool will not protect the operator from all
foreign objects (gravel, glass, wire, etc.)
thrown back by the rotating cutting
attachment. Thrown objects may also
ricochet and strike the operator.
Warning!
To reduce the risk of
injury to your eyes never
operate your power tool
unless wearing goggles
or properly fitted protec-
tive glasses with
adequate top and side protection com-
plying with ANSI Z 87.1 (or your
applicable national standard). To
reduce the risk of injury to your face
STIHL recommends that you also wear
a face shield or face screen over your
goggles or protective glasses.
Wear an approved safety hard hat to
reduce the risk of injury to your head
when there is a danger of head injuries.
Power tool noise may damage your
hearing. Wear sound barriers (ear plugs
or ear mufflers) to protect your hearing.
Continual and regular users should
have their hearing checked regularly.
Always wear gloves
when handling the
machine and metal
blades. Heavy-duty, non-
slip gloves improve your
grip and help to protect
your hands.
Clothing must be sturdy
and snug-fitting, but allow
complete freedom of
movement. Wear long
pants made of heavy
material to help protect
your legs. Do not wear
shorts, sandals or go
barefoot.
Good footing is very
important. Wear sturdy
boots with nonslip soles.
Steel-toed safety boots
are recommended.
Warning!
Never modify this power tool in any way.
Only attachments supplied by STIHL
and expressly approved by STIHL for
use with the specific STIHL model are
authorized. Although certain unauthor-
ized attachments are useable with
STIHL power tools, their use may, in
fact, be extremely dangerous. For the
cutting attachments authorized by
STIHL for your unit, see the chapter
"Approved Combinations of Cutting
Attachment, Deflector, Limit Stop and
Harness" in the instruction manual or
the STIHL "Cutting Attachments, Parts
& Accessories" catalog.
Warning!
To reduce the risk of injury from loss of
control and blade or line contact, never
carry or transport your power tool with
the cutting attachment moving.

FS 460 C-M, FS 460 C-M L
English
6
It may be carried only in a horizontal
position. Grip the shaft in a manner that
the machine is balanced horizontally.
Keep the hot muffler away from your
body and the cutting attachment behind
you.
Fuel
Your STIHL power tool uses an oil-
gasoline mixture for fuel (see the
chapter on "Fuel" of your instruction
manual).
Fueling Instructions
In order to reduce the risk of burns and
other personal injury from escaping gas
vapor, remove the fuel filler cap on your
power tool carefully so as to allow any
pressure build-up in the tank to release
slowly. Never remove the fuel filler cap
while the engine is running.
Select bare ground for fueling and move
at least 10 feet (3 m) from the fueling
spot before starting the engine. Wipe off
any spilled fuel before starting your
machine.
Cap with Grip
Warning!
To reduce the risk of
burn injury, do not touch
hot parts of the machine
and the gear housing
when they are hot.
Warning!
Always shut off the engine and make
sure the cutting attachment has stopped
before putting a clearing saw down.
When transporting it in a vehicle, prop-
erly secure it to prevent turnover, fuel
spillage and damage to the unit. STIHL
recommends that you keep metal
blades covered with the transport guard
(optional accessory).
002BA272 KN
Warning!
Gasoline is an extremely
flammable fuel. If spilled
and ignited by a spark or
other ignition source, it
can cause fire and seri-
ous burn injury or
property damage. Use extreme caution
when handling gasoline or fuel mix. Do
not smoke or bring any fire or flame near
the fuel or the power tool. Note that
combustible fuel vapor may escape
from the fuel system.
Warning!
Fuel your power tool in well-ventilated
areas, outdoors. Always shut off the
engine and allow it to cool before refu-
eling. Gasoline vapor pressure may
build up inside the fuel tank depending
on the fuel used, the weather conditions
and the tank venting system.
Warning!
Check for fuel leakage
while refueling and dur-
ing operation. If fuel
leakage is found, do not
start or run the engine
until the leak is fixed and
any spilled fuel has been wiped away.
Take care not to get fuel on your cloth-
ing. If this happens, change your
clothing immediately.
Warning!
In order to reduce the risk of fuel spill-
age and fire from an improperly
tightened fuel cap, correctly position
and tighten the fuel cap in the fuel tank
opening.
To do this with this STIHL
cap, raise the grip on the
top of the cap until it is
upright at a 90° angle.
Insert the cap in the fuel
tank opening with the tri-
angular marks on the grip
of the cap and on the fuel
tank opening lining up.
Using the grip, turn the
cap firmly clockwise as
far as it will go (approx. a
quarter turn).

FS 460 C-M, FS 460 C-M L
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7
Before Starting Keep the handles clean and dry at all
times; it is particularly important to keep
them free of moisture, pitch, oil, fuel mix,
grease or resin in order for you to
maintain a firm grip and properly control
your power tool.
As can be seen in that chart, some
cutting attachments may require you to
change your deflector, limit stop and / or
harness.
Keep the deflector (and the attached
skirt where appropriate) adjusted
properly at all times (see chapters on
"Mounting the Deflector" and "Mounting
the Cutting Attachment" of your
instruction manual).
Arrows on the deflector (A) and limit
stop (B) (as seen from the underside)
show the correct direction of rotation of
the cutting attachment. When viewed
from above, however, the cutting
attachment rotates counterclockwise.
Some of the following symbols may be
embossed on the outside of the deflector
in order to indicate the approved
combination of cutting attachment and
deflector.
Fold the grip flush with
the top of the cap. If the
grip does not lie com-
pletely flush with the cap
and the detent on the grip
does not fit in the corre-
sponding recess in the
filler opening, the cap is
not properly seated and
tightened and you must
repeat the above steps.
Warning!
Always check your power tool for proper
condition and operation before starting,
particularly the throttle trigger, throttle
trigger lockout, momentary stop switch,
cutting attachment, deflector and har-
ness. The throttle trigger must move
freely and always spring back to the idle
position. Never attempt to modify the
controls or safety devices.
Warning!
Never operate your power tool if it is
damaged, improperly adjusted or main-
tained, or not completely or securely
assembled.
Warning!
Do not attach any cutting attachment to
a unit without proper installation of all
required parts. Failure to use the proper
parts may cause the blade or head to fly
off and seriously injure the operator or
bystanders.
Warning!
The cutting attachment must be prop-
erly tightened and in safe operating
condition. Inspect for loose parts (nuts,
screws, etc.) and for cracked or dam-
aged heads or cracked, bent, warped or
damaged blades. Replace damaged
heads or blades before using the power
tool. Always keep blades sharp.
Warning!
Check that the spark plug boot is
securely mounted on the spark plug – a
loose boot may cause arcing that could
ignite combustible fumes and cause a
fire.
Warning!
To reduce the risk
of personal injury
to the operator
from blade or line
contact and
thrown objects, make sure your unit is
equipped with the proper deflector, limit
stop and harness for the type of cutting
attachment being used (see chart in the
chapter on "Approved Combinations of
Cutting Attachment, Deflector, Limit
Stop and Harness").
A
000BA006 KN
B
000BA007 KN

FS 460 C-M, FS 460 C-M L
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8
Adjust carrying harness and hand grip to
suit your size before starting work. The
machine should be properly balanced as
specified in your instruction manual for
proper control and less fatigue in
operation. To be better prepared in case
of an emergency, practice releasing the
unit from the harness as quickly as
possible.
Starting
Start the engine at least 10 feet (3 m)
from the fueling spot, outdoors only.
For specific starting instructions, see the
appropriate section of your manual.
Place the power tool on firm ground or
other solid surface in an open area.
Maintain good balance and secure
footing.
Once the engine has started,
immediately blip the throttle trigger,
which should release the starting throttle
and allow the engine to slow down to
idle.
With the engine running only at idle,
attach the power tool to the spring hook
of your harness (see appropriate
chapter of this manual).
Important Adjustments
If your power tool shows an incorrect idle
speed, have your STIHL dealer check
your power tool and make proper
adjustments and repairs.
The deflector may be
used in combination with
mowing heads.
The deflector may be
used in combination with
grass cutting blades.
The deflector may be
used in combination with
brush knives.
The deflector must not be
used in combination with
mowing heads.
The deflector must not be
used in combination with
grass cutting blades.
The deflector must not be
used in combination with
brush knives.
The deflector must not be
used in combination with
circular saw blades.
Warning!
To reduce the risk of injury from blade or
line contact, be absolutely sure that the
cutting attachment is clear of you and all
other obstructions and objects, includ-
ing the ground, because when the
engine starts at starting-throttle, engine
speed will be fast enough for the clutch
to engage and move the cutting
attachment.
Warning!
Your power tool is a one-person
machine. Do not allow other persons in
the general work area, even when
starting.
Warning!
To reduce the risk of injury from loss of
control, do not attempt to "drop start"
your power tool.
Warning!
When you pull the starter grip, do not
wrap the starter rope around your hand.
Do not let the grip snap back, but guide
the starter rope to rewind it properly.
Failure to follow this procedure may
result in injury to your hand or fingers
and may damage the starter
mechanism.
Warning!
To reduce the risk of personal injury
from loss of control or contact with the
running cutting attachment, do not use
your unit with incorrect idle speed. At
correct idle speed, the cutting attach-
ment should not move.

FS 460 C-M, FS 460 C-M L
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9
During Operation
Holding and Controlling the Power
Tool
Always hold the unit firmly with both
hands on the handles while you are
working. Wrap your fingers and thumbs
around the handles, keeping the
handles cradled between your thumb
and forefinger.
Working Conditions
Operate and start your power tool only
outdoors in a well-ventilated area.
Operate it under good visibility and
daylight conditions only. Work carefully.
Warning!
This unit is equipped with an ignition
system that is normally in operational
readiness. After the setting lever is used
to stop the engine, it automatically
springs back to the "on" position. If the
engine is warm, it may be possible to
start it by simply pulling the starter rope,
with no further adjustments. To reduce
the risk of injury, be particularly alert to
keep children away from the unit.
002BA257 KN
Warning!
Never attempt to operate
your power tool with one
hand. Loss of control of
the power tool resulting in
serious or fatal injury may
result. To reduce the risk
of cut injuries, keep hands and feet
away from the cutting attachment.
Never touch a moving cutting attach-
ment with your hand or any other part of
your body.
Warning!
Do not overreach. Keep proper footing
and balance at all times. Special care
must be taken in slippery conditions
(wet ground, snow) and in difficult, over-
grown terrain. Watch for hidden
obstacles such as tree stumps, roots
and ditches to avoid stumbling. For bet-
ter footing, clear away scrub and
cuttings. Be extremely cautious when
working on slopes or uneven ground.
Warning!
To reduce the risk of injury from loss of
control, never work on a ladder or on
any other insecure support. Never hold
the cutting attachment above waist
height.
Warning!
As soon as the engine is
running, this product gen-
erates toxic exhaust
fumes containing chemi-
cals, such as unburned
hydrocarbons (including
benzene) and carbon monoxide, that
are known to cause respiratory prob-
lems, cancer, birth defects, or other
reproductive harm. Some of the gases
(e.g. carbon monoxide) may be color-
less and odorless. To reduce the risk of
serious or fatal injury / illness from inhal-
ing toxic fumes, never run the machine
indoors or in poorly ventilated locations.
Warning!
If the vegetation being cut or the sur-
rounding ground is coated with a
chemical substance (such as an active
pesticide or herbicide), read and follow
the instructions and warnings that
accompanied the substance at issue.

FS 460 C-M, FS 460 C-M L
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10
Operating Instructions
In the event of an emergency, shut off
the engine immediately – move the
momentary stop switch to STOP.
To reduce the risk of eye and other injury
always wear proper eye protection (see
the chapter on "Proper Clothing") and
ensure that bystanders are at least
50 feet (15 m) away. To reduce the risk
of damage to property, also maintain this
distance from such objects as vehicles
or windows. Any coworkers who must be
in the restricted area should also wear
goggles or protective glasses. Stop the
engine immediately if you are
approached.
Warning!
Inhalation of certain dusts, especially
organic dusts such as mold or pollen,
can cause susceptible persons to have
an allergic or asthmatic reaction. Sub-
stantial or repeated inhalation of dust
and other airborne contaminants, in par-
ticular those with a smaller particle size,
may cause respiratory or other ill-
nesses. Control dust at the source
where possible. Use good work prac-
tices, such as operating the unit so that
the wind or operating process directs
any dust raised by the power tool away
from the operator. Follow the recom-
mendations of EPA / OSHA / NIOSH
and occupational and trade associa-
tions with respect to dust ("particulate
matter"). When the inhalation of dust
cannot be substantially controlled, i.e.,
kept at or near the ambient (back-
ground) level, the operator and any
bystanders should wear a respirator
approved by NIOSH / MSHA for the type
of dust encountered.
Warning!
Do not operate your power tool using
the starting throttle position, as you do
not have control of the engine speed.
Warning!
The cutting attachment
continues to rotate for a
short period after the
throttle trigger is
released (flywheel
effect.
Warning!
The rotating cutting attachment may
fling foreign objects directly or by rico-
chet a great distance.
15m (50ft)
Warning!
Before you start work,
examine the area for
stones, glass, fence
wire, metal, trash or
other solid objects. The
cutting attachment could
throw objects of this kind.
Warning!
This clearing saw is normally to be used
at ground level with the cutting attach-
ment parallel to the ground. Use of a
clearing saw above ground level or with
the cutting attachment perpendicular to
the ground may increase the risk of
injury, since the cutting attachment is
more fully exposed and the power tool
may be more difficult to control. Never
use your clearing saw as a hedge
trimmer.
Warning!
During cutting, check the tightness and
the condition of the cutting attachment
at regular short intervals with the engine
and attachment stopped. If the behavior
of the attachment changes during use,
stop the engine immediately, wait until
the cutting attachment stops, and check
the nut securing the attachment for
tightness and the blade or head for
cracks, wear and damage.

FS 460 C-M, FS 460 C-M L
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11
USING THE CUTTING ATTACHMENT
For an illustration of the various cutting
attachments and instructions on proper
mounting see the chapter on "Mounting
the Cutting Attachment" in your
instruction manual.
Warning!
A loose blade or head may vibrate,
crack, break or come off the clearing
saw, which may result in serious or fatal
injury. Make sure that the cutting attach-
ment is properly tightened. Use the
wrench supplied or one of sufficient
length to obtain the proper torque. If the
blade or head loosens after being prop-
erly tightened, stop work immediately.
The retaining nut may be worn or dam-
aged and should be replaced. If the
blade or head continues to loosen, see
your STIHL dealer. Never use a clearing
saw with a loose cutting attachment.
Warning!
Replace a cracked, damaged or worn-
out head or a cracked, bent, warped,
damaged, dull or worn out blade imme-
diately, even if damage is limited to
superficial cracks. Such attachments
may shatter at high speed and cause
serious or fatal injury.
Warning!
When using rigid blades, avoid cutting
close to fences, sides of buildings, tree
trunks, stones or other such objects that
could cause the power tool to kick out or
could cause damage to the blade.
STIHL recommends use of the nylon
line heads for such jobs. In addition, be
alert to an increased possibility of rico-
chets in such situations.
Warning!
If the head, blade or deflector becomes
clogged or stuck, always shut off the
engine and make sure the cutting
attachment has stopped before clean-
ing. Grass, weeds, etc. should be
cleaned off the blade or from around the
head at regular intervals.
Warning!
To reduce the risk of unintentional rota-
tion of the cutting attachment and injury,
always shut off the engine and remove
the spark plug boot before replacing the
cutting attachment. To reduce the risk of
injury, always shut off the engine before
adjusting the length of the nylon line on
manually adjustable mowing heads.
Warning!
Do not turn the engine on over the
starter with the spark plug boot or spark
plug removed since there is otherwise a
risk of fire from uncontained sparking.
Warning!
The gearbox becomes hot during oper-
ation. To reduce the risk of burn injury,
do not touch the gear housing when it is
hot.
Warning!
The muffler and other parts of the
engine (e.g. fins of the cylinder, spark
plug) become hot during operation and
remain hot for a while after stopping the
engine. To reduce risk of burns do not
touch the muffler and other parts while
they are hot.
Warning!
To reduce the risk of fire and burn injury,
keep the area around the muffler clean.
Remove excess lubricant and all debris
such as pine needles, branches or
leaves. Let the engine cool down sitting
on concrete, metal, bare ground or solid
wood away from any combustible
substances.
Warning!
Never modify your muffler. The muffler
could be damaged and cause an
increase in heat radiation or sparks,
thereby increasing the risk of fire and
burn injury. You may also permanently
damage the engine. Have your muffler
serviced and repaired by your STIHL
servicing dealer only.

FS 460 C-M, FS 460 C-M L
English
12
Using the Mowing Heads
Do not use with mowing line longer than
the intended length. With a properly
mounted deflector, the built-in line-
limiting blade will automatically adjust
the line to its proper length.
Using the unit with an overly long nylon
cutting line increases the load on the
engine and reduces its operating speed.
This causes the clutch to slip
continuously and results in overheating
and damage to important components
(e.g. clutch, polymer housing
components). Such damage could,
among other things, cause the cutting
attachment to rotate at idle.
Mowing heads are to be used only on
clearing saws equipped with a line-
limiting blade in the deflector in order to
keep the line at the proper length (see
"Main Parts" chapter in your instruction
manual).
If the lawn edges are planted with trees
or bordered by a fence etc., it is best to
use a nylon line head. It achieves a
"softer" cut with less risk of damaging
tree bark etc. than polymer blades.
However, the polymer-bladed STIHL
PolyCut produces a better cut if there
are no plants along the edge of the lawn.
Sharpening is not necessary, and worn
polymer blades are easily replaced.
STIHL SuperCut mowing head
Fresh line is advanced automatically.
Frayed line is replaced by a simple
adjustment (see instruction sheet
supplied with mowing head).
STIHL AutoCut mowing head
Nylon cutting line advances
automatically when tapped against the
ground (TapAction).
STIHL TrimCut mowing head
Frayed line is replaced by a simple
adjustment (see instruction sheet
supplied with mowing head).
STIHL PolyCut mowing head
Uses either nylon lines or nonrigid,
pivoting polymer blades.
Observe wear indicators.
Warning!
To reduce the risk of severe or fatal
injury from blade contact and / or loss of
control, never attempt to use a metal
blade on an FS model for which it is not
authorized.
002BA354 KN
Warning!
To reduce the risk of serious injury,
never use wire or metal-reinforced line
or other material in place of the nylon
cutting lines. Pieces of wire could break
off and be thrown at high speed toward
the operator or bystanders.
Warning!
Three rectangular wear limit marks are
applied to the base (periphery) of the
PolyCut. To reduce the risk of serious
injury from breakage of the head or
blades, the PolyCut must not be used
when it has worn as far as one of these
marks. It is important to follow the main-
tenance instructions supplied with the
head.
Warning!
If the wear limit marks are ignored, there
is a risk of the cutting attachment shat-
tering and flying parts injuring the
operator or bystanders. To reduce the
risk of accidents from shattered blades,
avoid contact with stones, metal and
similar solid objects. Check PolyCut
blades for cracks at regular intervals. If
a crack is found on one blade, always
replace all blades.
002BA396 KN

FS 460 C-M, FS 460 C-M L
English
13
Risk of Kickout (Blade Thrust) with all
Rigid Cutting Blades
This kickout (blade thrust) may cause
loss of control of the power tool and may
result in serious or fatal injury to the
operator or bystanders. To reduce the
risk of injury, extreme caution should be
used when cutting with the shaded area
of any rigid blade.
Using the Grass Cutting Blade
All kinds of grass and weeds can be
easily cut with the grass cutting blade.
The power tool is swept in an arc similar
to a scythe.
The 4-tooth grass cutting blade is
intended to cut grass and weeds. It has
4 cutting knives with cutting edges on
both sides, i.e. front and rear. When the
cutting edges on one side become dull,
the blade can be turned over to utilize
the cutting edges on the other side.
The 8-tooth grass cutting blade is
recommended for cutting fern or reed.
Both types of grass cutting blade have to
be resharpened when all cutting edges
are dull.
Using the Brush Knife
When fitted to the power tool, the brush
knife is suitable for applications ranging
from cutting matted grass to clearing
weeds, wild growth and scrub.
To cut wild growth and scrub, lower the
rotating brush knife down onto the
growth to achieve a chopping effect –
but keep the tool below waist height at
all times.
Use the power tool like a scythe to cut
grass, i.e. sweep it to and fro in an arc.
Warning!
Kickout (blade thrust) is the sudden and
uncontrolled motion towards the opera-
tor's right or rear that can occur when
the shaded area (especially the darkly
shaded area) of a rotating blade comes
in contact with a solid rigid object like a
tree, rock, bush or wall. The rapid coun-
terclockwise rotation of the blade may
be stopped or slowed, and the cutting
attachment may be thrown to the right or
to the rear.
002BA135 KN
Warning!
To reduce the risk of serious or fatal
injury from blade breakage, never
attempt to use this blade to cut woody
materials.
002BA355 KN
Warning!
Exercise extreme caution when using
this method of cutting. The higher the
cutting attachment is off the ground, the
greater the risk of loss of control and of
cuttings being thrown sideways.
Warning!
When cutting woody materials, use the
left side of the blade to avoid "kickout"
(blade thrust) situations.
Warning!
Improper use of a brush knife may
cause it to crack, chip or shatter.
Thrown blade fragments may seriously
or fatally injure the operator or bystand-
ers. To reduce the risk of injury, avoid
contact with hard or solid foreign objects
such as stones, rocks or pieces of
metal.
002BA066 KN

FS 460 C-M, FS 460 C-M L
English
14
Using the Circular Saw Blade
Circular saw blades are suitable for
thinning brush and cutting small trees up
to a diameter of 7 cm (2 3/4 in.). Do not
attempt to cut trees with larger
diameters, since the blade may catch or
jerk the trimmer / brushcutter forward.
This may cause damage to the blade or
loss of control of the power tool and
result in serious injury. Use a chain saw
for such work.
When a clearing saw with a circular saw
blade is used to cut down small trees,
STIHL recommends that the standard
deflector be removed and replaced by
the special limit stop deflector (see
chapter on "Mounting the Deflector").
This limit stop helps to keep the unit
positioned against the tree during the
cutting process. Inexperienced users
should place the left side of the stop
against the tree trunk before beginning
to cut. This will keep the clearing saw
against the tree during the cutting
operation and will reduce the risk of loss
of control and possible kickout
(described above and briefly again
below).
Before starting the cut, accelerate the
engine up to full throttle. Perform cut
with uniform pressure. STIHL
recommends that the circular saw blade
be applied to the right of the tree, using
the non-shaded area of the blade, as
shown in the illustration above.
When felling small trees, maintain a
distance of at least two tree lengths from
the nearest coworker.
Warning!
When cutting young saplings or other
woody materials up to 2 cm (3/4 in.) in
diameter, use the left side of the blade
to avoid "kickout" situations (see section
on "Risk of kickout (blade thrust) with all
rigid cutting blades"). Do not attempt to
cut woody material with a larger diame-
ter, since the blade may catch or jerk the
power tool forward. This may cause
damage to the blade or power tool or
loss of control of the power tool, result-
ing in personal injury. Use a circular saw
blade for such work.
Warning!
Inspect the brush knife at regular short
intervals for signs of damage. Do not
continue working with a damaged brush
knife. Resharpen the brush knife regu-
larly (when it has dulled noticeably).
002BA067 KN
Warning!
To reduce the risk that the blade will
crack and / or break, avoid all contact
with stones, rocks or the ground.
Sharpen blades in a timely manner as
specified – dull teeth may cause the
blade to crack or shatter.
002BA214 ST
Warning!
The risk of kickout is highest when cut-
ting in the darker shaded area. To
reduce the risk of kickout and resulting
injury, do not use this area of the circular
saw blade for cutting trees or shrubs.
Special techniques using the lighter
shaded areas of the blade to cut shrubs
and trees should only be used by expe-
rienced operators with specialized
training in the use and control of the
clearing saw.
Warning!
In order to reduce the risk of injury from
thrown objects or operator contact with
the blade or head, be sure to remount
the standard deflector when no longer
using a circular saw blade.
002BA068 KN

FS 460 C-M, FS 460 C-M L
English
15
MAINTENANCE, REPAIR AND
STORING
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.
Strictly follow the maintenance and
repair instructions in the appropriate
sections of your instruction manual.
Wear gloves when handling or
performing maintenance on blades.
Keep blades sharp. Tighten all nuts,
bolts and screws after each use.
Do not clean your machine with a
pressure washer. The solid jet of water
may damage parts of the machine.
Store the power tool in a dry and high or
locked location out of reach of children.
Before storing for longer than a few
days, always empty the fuel tank. See
chapter "Storing the Machine" in the
instruction manual.
Warning!
Use only identical STIHL replacement
parts for maintenance and repair. Use of
non-STIHL parts may cause serious or
fatal injury.
Warning!
Always stop the engine and make sure
that the cutting attachment is stopped
before doing any maintenance or repair
work or cleaning the power tool. Do not
attempt any maintenance or repair work
not described in your instruction man-
ual. Have such work performed by your
STIHL servicing dealer only.
Warning!
Use the specified spark plug, and make
sure it and the ignition lead are always
clean and in good condition. Always
press the spark plug boot snugly onto
the spark plug terminal of the proper
size. (Note: If the terminal has a detach-
able SAE adapter nut, it must be
securely attached.) A loose connection
between the spark plug and the ignition
wire connector in the boot may create
arcing that could ignite combustible
fumes and cause a fire.
Warning!
Never test the ignition system with the
spark plug boot removed from the spark
plug or with a removed spark plug, since
uncontained sparking may cause a fire.
Warning!
Do not operate your power tool if the
muffler is damaged, missing or modi-
fied. An improperly maintained muffler
will increase the risk of fire and hearing
loss. If your muffler was equipped with a
spark-arresting screen to reduce the
risk of fire, never operate your power
tool if the screen is missing or damaged.
Remember that the risk of forest fires is
greater in hot or dry weather.
Warning!
Never repair damaged cutting attach-
ments by welding, straightening or
modifying the shape. This may cause
parts of the cutting attachment to come
off and result in serious or fatal injuries.

FS 460 C-M, FS 460 C-M L
English
16
Approved Combinations of Cutting Attachment, Deflector, Limit Stop and Harness
Cutting attachment Deflector, limit stop Harness
8
681BA172 KN
6
910
7
13
14
15
17
11 12 16
1
54
23

FS 460 C-M, FS 460 C-M L
English
17
Permissible combinations
Choose the proper combination from the
table depending on the cutting
attachment!
Cutting attachments
Mowing heads
1STIHL SuperCut 40-2
2STIHL AutoCut 40-2
3STIHL AutoCut 40-4
4STIHL TrimCut 41-2
5STIHL PolyCut 41-3
Metal cutting attachments
6Grass cutting blade 230-4
7Grass cutting blade 255-8
8Brush knife 300-3
9Circular saw blade 200 scratcher
tooth
10 Circular saw blade 200 chisel tooth
11 Circular saw blade 225 scratcher
tooth
12 Circular saw blade 225 chisel tooth
Deflectors, limit stops
Deflectors
13 Deflector only for mowing heads
14 Deflector for the mowing tools
Items 6 to 8
Limit stops
15 Limit stop for circular saw blades
200
16 Limit stop for circular saw blades
225
Harnesses
17 Full harness must be used
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).
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!
Circular saw blades of other, non-
metal materials must not be used.
Warning!
Based on the cutting attachment being
used:
Choose the proper deflector in order to
reduce the risk of injury from thrown
objects and contact with the cutting
attachment.
Make sure your unit is equipped with the
proper handle and harness in order to
reduce the risk of injury from loss of con-
trol and contact with the cutting
attachment.
Use grass cutting metal blades, brush
knifes and circular saw blades on this
unit only if equipped with a bike handle.
Do not use rigid polymer blades on this
unit.
Mounting the Bike Handle
2
1
6BA018 KN
3
4
5
002BA352 KN

FS 460 C-M, FS 460 C-M L
English
18
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.
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).
7
5
6BA002 KN
6
2
8
6BA019 KN
2
83
5
4
6BA001 KN
9
10
11
1
6BA020 KN
2
A