Stihl BR 200 User manual

{
STIHL BR 200
WARNING
Read Instruction Manual thoroughly
before use and follow all safety
precautions – improper use can
cause serious or fatal injury.
ADVERTENCIA
Antes de usar la máquina 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 - 32
Manual de instrucciones
33 - 67

Original Instruction ManualPrinted on chlorine-free paper
Printing inks contain vegetable oils, paper can be recycled.
© ANDREAS STIHL AG & Co. KG, 2014 0458-455-8621-C. VA2.K14. 0000006505_004_GB
BR 200
English
1
{This instruction manual is protected by copyright. All rights reserved, especially the rights to reproduce, translate and process
with electronic systems.
Contents
Allow only persons who fully understand
this manual to operate your blower.
To receive maximum performance and
satisfaction from your STIHL blower, 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
blower. 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.
WARNING
Because a blower is a high-speed tool,
some special safety precautions must
be observed as with any other power
tool to reduce the risk of personal injury.
Careless or improper use may cause
serious or even fatal injury.
Guide to Using this Manual 2
Safety Precautions and Working
Techniques 2
Assembling the Unit 11
Adjusting the Throttle Cable 12
Fitting the Harness 12
Fuel 12
Fueling 13
Information Before You Start 14
Starting / Stopping the Engine 15
Operating Instructions 17
Cleaning the Air Filter 17
Engine Management 18
Adjusting the Carburetor 18
Spark Plug 19
Engine Running Behavior 20
Rewind Starter 20
Storing the Machine 21
Inspections and Maintenance by
Dealer 21
Maintenance and Care 22
Main Parts 24
Specifications 25
Maintenance and Repairs 26
Disposal 26
STIHL Incorporated Federal
Emission Control Warranty
Statement 27
STIHL Incorporated California
Exhaust and Evaporative
Emissions Control Warranty
Statement 29
Trademarks 31

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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:
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.
NOTICE
Indicates a risk of property damage,
including damage to the machine or its
individual components.
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 or the STIHL
distributor for your area for assistance.
Have your STIHL dealer show you how
to operate your power tool. Observe all
applicable local safety regulations,
standards and ordinances.
WARNING
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.
WARNING
The use of this machine may be
hazardous.
Use your blower only for clearing leaves,
grass, paper and dust in yards, gardens,
sport stadiums, parks, driveways and
parking lots.
Guide to Using this Manual
Fuel tank for gasoline
and engine oil mixture
Press to operate manual
fuel pump
Safety Precautions and
Working Techniques
Because a blower is
gasoline-powered and
produces a strong air
blast, special safety pre-
cautions must be
observed to reduce the
risk of personal 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.

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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.
WARNING
To reduce the risk of injury to bystanders
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
unauthorized persons do not use it.
Most of these safety precautions and
warnings apply to the use of all STIHL
blowers. 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.
Do not clean your machine with a
pressure washer. The solid jet of water
may damage parts of the machine.
Safe use of a blower 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.
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 white finger
disease (Raynaud's phenomenon) or
carpal tunnel syndrome.
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 white
finger 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 white
finger disease. In order to reduce the
risk of white finger 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.
–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 handle with
constant, excessive pressure. Take
frequent breaks.
All the above-mentioned precautions do
not guarantee that you will not sustain
white finger 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
The ignition system of the STIHL unit
produces an electromagnetic field of a
very low intensity. This field may
interfere with some pacemakers. To
reduce the risk of serious or fatal injury,
persons with a pacemaker should

BR 200
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consult their physician and the
pacemaker manufacturer before
operating this tool.
Proper Clothing
WARNING
To reduce the risk of injury, the operator
should wear proper protective apparel.
WARNING
Be particularly alert and cautious when
wearing hearing protection because
your ability to hear warnings (shouts,
alarms, etc.) is restricted.
WARNING
To reduce the risk of injury when the
inhalation of dust cannot be
substantially controlled use an
appropriate respirator for the material
being blown. For more information see
the "Working conditions" section of
these Safety Precautions.
THE POWER TOOL
For illustrations and definitions of the
power tool parts see the chapter on
"Main Parts."
WARNING
Never modify this power tool in any way.
Only attachments supplied by STIHL or
expressly approved by STIHL for use
with the specific STIHL model are
authorized. Although certain
unauthorized attachments are useable
with STIHL power tools, their use may,
in fact, be extremely dangerous.
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.
WARNING
Small particles (e.g. dust) blown through
the blower tubes and nozzle can cause
a static charging of the blower tubes.
This is especially true in low humidity
and high dust conditions.
In order to reduce the risk of shock from
static charging and subsequent injury
from loss of control, STIHL offers an
optional kit for use in especially dry and
dusty conditions. Contact your STIHL
dealer for information regarding special
accessories that may be available for
your product.
If your blower is properly assembled and
you are still experiencing static shocks,
make sure that your footwear has
conductive soles and try operating your
unit without gloves, which may be
interfering with the conduction of the
charge.
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 complying with
ANSI Z87 "+" (or your
applicable national
standard).
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.
Clothing must be sturdy
and snug-fitting, but allow
complete freedom of
movement.
Avoid loose-fitting jack-
ets, scarfs, neckties,
jewelry, flared or cuffed
pants, unconfined long
hair or anything that
could become drawn into
the air intake. Secure hair
so it is above shoulder
level.
Good footing is very
important. Wear sturdy
boots with nonslip soles.
Steel-toed safety boots
are recommended.

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THE USE OF THE POWER TOOL
Transporting the Power Tool
WARNING
Always switch off the engine before
taking the machine off your back and
putting it down. When transporting it in a
vehicle, properly secure it to prevent
turnover, fuel spillage and damage to
the unit.
Fuel
Your STIHL power tool uses an oil-
gasoline mixture for fuel (see the
chapter on "Fuel" of your instruction
manual).
WARNING
Fueling Instructions
WARNING
To reduce the risk of serious injury from
burns, never attempt to refuel the unit
until it has been completely removed
from the operator.
WARNING
Fuel your power tool in well-ventilated
areas, outdoors. Always shut off the
engine and allow it to cool before
refueling. Gasoline vapor pressure may
build up inside the fuel tank depending
on the fuel used, the weather conditions
and the tank venting system.
In order to reduce the risk of burns and
other personal injury from escaping gas
vapor and fumes, 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.
WARNING
Screw Cap
WARNING
See also the "Fueling" chapter in your
Instruction Manual for additional
information.
Before Starting
WARNING
Always check your power tool for proper
condition and operation before starting,
particularly the throttle trigger, setting
lever and momentary stop switch. The
throttle trigger must move freely and
always spring back to the idle position.
Never attempt to modify the controls or
safety devices.
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 combusti-
ble fuel vapor may
escape from the fuel
system.
Check for fuel leakage
while refueling and during
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
clothing. If this happens,
change your clothing
immediately.
Unit vibrations can cause
an improperly tightened
fuel filler cap to loosen or
come off and spill quanti-
ties of fuel. In order to
reduce the risk of fuel
spillage and fire, tighten
the fuel filler cap by hand
as securely as possible.

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WARNING
Check fuel system for leaks, especially
the visible parts, e.g., filler cap, hose
connections, manual fuel pump (only for
power tools equipped with a manual fuel
pump). Do not start the engine if there
are leaks or damage – risk of fire! Have
the machine repaired by a servicing
dealer before using it.
WARNING
Never operate your power tool if it is
damaged, improperly adjusted or
maintained, or not completely or
securely assembled.
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.
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.
WARNING
To reduce the risk of injury from parts
thrown by the fan wheel, check the fan
housing for damage (cracks or holes
that could allow foreign objects to
contact the fan wheel). If any such
damage is found, stop using the unit and
contact your STIHL dealer for repair.
WARNING
Adjust carrying harness to suit your size
before starting work.
In an emergency, you may slip out of the
harness and throw off the machine
quickly. Try slipping out of the harness a
number of times before using the
machine in order to become
accustomed to it. Do not throw off the
machine while practicing as it could
damage the machine.
Starting
To reduce the risk of fire and burn
injuries, start the engine at least 10 feet
(3 m) from the fueling spot, outdoors
only.
WARNING
Your power tool is a one-person
machine. To reduce the risk of eye or
other injury from thrown objects, insure
that bystanders are at least 50 feet
(15 m) away during use. Stop operation
immediately if you are approached.
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.
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.
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.
Once the engine has started,
immediately blip the throttle trigger,
which should cause the choke knob to
move to the run position and allow the
engine to slow down to idle.

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During Operation
Holding and Controlling the Power Tool
The blower is designed for single-
handed operation with the right hand on
the control handle. It should be carried
as a backpack with the straps of the
harness over both shoulders.
Watch out for small animals when using
the blower on open ground, in yards and
gardens.
WARNING
To reduce the risk of loss of control,
never carry the unit with the strap(s)
over one shoulder.
Wrap your fingers tightly around the
handle, keeping the control handle
cradled between your thumb and
forefinger. Keep your hand in this
position to have your machine under
control at all times.
WARNING
Special care must be taken in slippery
conditions (wet ground) and in difficult,
overgrown terrain. Watch for hidden
obstacles such as tree stumps, roots,
rocks, holes and ditches to avoid
stumbling. For better footing, clear away
fallen branches, scrub and cuttings. Be
extremely cautious when working on
slopes or uneven ground.
To reduce the risk of stumbling and loss
of control, do not walk backward while
operating the machine.
WARNING
To reduce the risk of injury from loss of
control, never work on a ladder or on any
other insecure support.
Working Conditions
To minimize blowing time, use a rake
and broom to loosen dirt particles before
you start blowing.
Save water by using a blower instead of
a water hose for lawn and garden work
wherever possible, e.g. for cleaning
yards and patios.
Recommended working technique to
minimize air pollution:
–If conditions are very dusty, dampen
surfaces slightly before blowing.
–Pull out the nozzle to full length so
that the airstream is at ground level.
–Do not blow particles in the direction
of bystanders, in particular in the
direction of children, pets, open
windows or freshly washed
vehicles. Take special care in such
situations.
–Remove the blow-swept debris in
rubbish bins – do not blow it onto the
neighbor's land.
Recommended working technique to
minimize noise:
–Operate your power tool at
reasonable times only – not early in
the morning, late at night or during
midday rest periods when people
could be disturbed. Observe local
rest periods. Normal
recommendation for professional
use on weekdays: 9:00hrs to
12:00hrs and 15:00hrs to 17:00hrs.
Be considerate of neighbors at
weekends.
–Fewer engines mean less noise.
Where possible, do not run more
than one power tool at any time.
–Operate blowers at the lowest
engine speed necessary to
accomplish the task.
–Check your blower before starting
work. Pay special attention to the
muffler, air intakes and air filter.
Operate and start your power tool only
outdoors in a well-ventilated area.
Operate it under good visibility and
daylight conditions only. Work carefully.
0009BA001 KN

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WARNING
WARNING
Inhalation of certain dusts, especially
organic dusts such as mold or pollen,
can cause susceptible persons to have
an allergic or asthmatic reaction.
Substantial or repeated inhalation of
dust and other airborne contaminants, in
particular those with a smaller particle
size, may cause respiratory or other
illnesses. This includes wood dust,
especially from hardwoods, but also
from some softwoods such as Western
Red Cedar. Control dust at the source
where possible. Use good work
practices, 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
recommendations of
EPA/OSHA/NIOSH and occupational
and trade associations with respect to
dust ("particulate matter"). When the
inhalation of dust cannot be
substantially controlled, i.e., kept at or
near the ambient (background) level, the
operator and any bystanders should
wear a respirator approved by
NIOSH/MSHA for the type of dust
encountered.
WARNING
If the substance being blown is a
commercial substance, review the
material safety data sheet for that
substance and / or consult the material
manufacturer / supplier. The state of
California and some other authorities,
for instance, have published lists of
substances known to cause cancer,
reproductive toxicity, etc.
WARNING
Breathing asbestos dust is dangerous
and can cause severe or fatal illness,
respiratory illness or cancer. The use
and disposal of asbestos-containing
products have been strictly regulated by
OSHA and the Environmental Protection
Agency. If you have any reason to
believe that you might be blowing or
otherwise disturbing asbestos,
immediately contact your employer or a
local OSHA representative.
WARNING
Dust with silica in its composition may
contain crystalline silica. Silica is a basic
component of sand, quartz, brick, clay,
granite and numerous other minerals
and rocks, including masonry and
concrete products. Repeated and / or
substantial inhalation of airborne
crystalline silica can cause serious or
fatal respiratory disease, including
silicosis. In addition, the state of
California and some other authorities
have listed respirable crystalline silica as
a substance known to cause cancer.
When encountering such materials,
always follow the respiratory
precautions mentioned above.
Operating Instructions
WARNING
In the event of an emergency, switch off
the engine immediately – move the
setting lever to † or STOP.
WARNING
Even though bystanders should be kept
away from the running power tool, never
work alone. Keep within calling distance
of others in case help is needed.
Stop the engine immediately if you are
approached.
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 respira-
tory problems, 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
inhaling toxic fumes,
never run the machine
indoors or in poorly venti-
lated locations. If exhaust
fumes become concen-
trated due to insufficient
ventilation, clear obstruc-
tions from work area to
permit proper ventilation
before proceeding and/or
take frequent breaks to
allow fumes to dissipate
before they become
concentrated.

BR 200
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WARNING
To reduce the risk of personal injury, do
not direct air blast towards bystanders,
since the high pressure of the air flow
can injure eyes and can blow small
objects at great speed.
WARNING
The blower fan between the air intake
and output openings rotates whenever
the engine is running.
Never insert any foreign object into the
air intake of the machine or into the
nozzle of the blower. It will damage the
fan wheel and may cause serious injury
to the operator or bystanders as a result
of the object or broken parts being
thrown out at high speed.
Do not place the blower on the ground
when operating at high speed, because
small objects such as sand, grass, dust,
etc. may be pulled into the air intake and
damage the fan wheel. It is best to turn
the machine off when putting it on the
ground.
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 (e.g. the trunk of a felled tree)
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.
Catalytic converter
WARNING
WARNING
Since a muffler with a catalytic converter
cools down less rapidly than
conventional mufflers, always set your
power tool down in the upright position
and never locate it where the muffler is
near dry brush, grass, wood chips or
other combustible materials while it is
still hot.
WARNING
An improperly mounted or damaged
cylinder housing or a
damaged/deformed muffler shell may
interfere with the cooling process of the
catalytic converter. To reduce the risk of
fire or burn injury, do not continue work
with a damaged or improperly mounted
cylinder housing or a
damaged/deformed muffler shell.
Your catalytic converter is furnished with
screens designed to reduce the risk of
fire from the emission of hot particles.
Due to the heat from the catalytic
reaction, these screens will normally
stay clean and need no service or
maintenance. If you experience loss of
performance and you suspect a clogged
screen, have your muffler maintained by
a STIHL servicing dealer.
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.
Some STIHL power tools
are equipped with a cata-
lytic converter, which is
designed to reduce the
exhaust emissions of the
engine by a chemical
process in the muffler.
Due to this process, the
muffler does not cool
down as rapidly as con-
ventional mufflers when
the engine returns to idle
or is shut off. To reduce
the risk of fire and burn
injuries, the following
specific safety precau-
tions must be observed.

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WARNING
Use only identical STIHL replacement
parts for maintenance and repair. Use of
non-STIHL parts may cause serious or
fatal injury.
Strictly follow the maintenance and
repair instructions in the appropriate
section in this instruction manual.
Please refer to the maintenance chart in
this instruction manual.
WARNING
Always stop the engine and make sure
that the fan 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 this instruction manual.
Have such work performed by your
STIHL servicing dealer only.
Do not clean your machine with a
pressure washer. The solid jet of water
may damage parts of the machine.
WARNING
Use the specified spark plug and make
sure it and the ignition lead are always
clean and in good condition. Always
press spark plug boot snugly onto spark
plug terminal of the proper size. (Note: If
terminal has detachable SAE adapter
nut, it must be securely attached.) A
loose connection between spark plug
terminal 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
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 modified.
An improperly maintained muffler will
increase the risk of fire and hearing loss.
Your muffler is equipped with a spark-
arresting screen to reduce the risk of
fire; never operate your power tool if the
screen is missing, damaged or clogged.
Remember that the risk of a brush or
forest fire is greater in hot or dry
weather.
In California, it is a violation of § 4442 or
§ 4443 of the Public Resources Code to
use or operate gasoline-powered tools
on forest-covered, brush-covered or
grass-covered land unless the engine’s
exhaust system is equipped with a
complying spark arrester that is
maintained in effective working order.
The owner/operator of this product is
responsible for properly maintaining the
spark arrester. Other states or
governmental entities/agencies, such as
the U.S. Forest Service, may have
similar requirements. Contact your local
fire agency or forest service for the laws
or regulations relating to fire protection
requirements.
Tighten all nuts, bolts and screws except
the carburetor adjustment screws after
each use.
For maintenance items please also refer
to the maintenance chart in this
instruction manual.
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 this
instruction manual.
Store fuel in an approved and properly
labeled safety-type canister only. Take
care when handling gasoline! For health
and safety reasons, avoid direct contact
with the skin and avoid inhaling fuel
vapor!

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A screwdriver is included in the
accessory bag provided.
Fitting the pleated hose on the elbow
NOpen the hose clamp (1) and fit it on
the pleated hose (2).
NEngage the tab in the recess.
NPush the pleated hose (2) over the
slip ring (3) as far as stop.
NLine up the hose clamp (1) and slip
ring (3) – as shown.
NTighten down the screw (arrow).
Mounting the blower tube and nozzle
NConnect the blower tube (4) and
nozzle (5).
Mounting the control handle
NPull the ends of the clamp on the
control handle (6) apart and push it
over stub of pleated hose (2).
NAttach throttle cable to retainer on
the hose clamp (1).
Adjusting the control handle
NPut the machine on your back and
adjust the harness – see "Fitting the
Harness".
NPush the blower tube (4) into the
stub of pleated hose (2) as far as
the stop.
NMove the control handle (6) along
the tube to the most comfortable
position.
NTighten down the screw in the
control handle (6).
Assembling the Unit
12
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2
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6
2
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6
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It may be necessary to correct the
adjustment of the throttle cable after
assembling the machine or after a
prolonged period of operation.
Adjust the throttle cable only when the
unit is completely and properly
assembled.
NSet throttle trigger to the full throttle
position – as far as stop.
NCarefully rotate the screw in the
throttle trigger in the direction of the
arrow until you feel initial resistance.
Then rotate it another full turn.
Adjusting the Harness
NPull the ends of the straps
downwards to tighten the harness.
Loosening the Harness
NLift the tabs of the sliding adjusters.
NAdjust the harness so that the
backplate fits snugly and securely
against your back.
This engine is certified to operate on
unleaded gasoline and the STIHL two-
stroke engine oil at a mix ratio of 50:1.
Your engine requires a mixture of high-
quality gasoline and two-stroke air
cooled engine oil.
Use mid-grade unleaded gasoline with a
minimum octane rating of 89 ((R+M)/2)
and no more than 10% ethanol content.
Fuel with a lower octane rating may
increase engine temperatures. This, in
turn, increases the risk of 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 and
catalytic converters as well. This could
cause running problems or even
damage the engine. For this reason
STIHL recommends that you use only
high-quality unleaded gasoline!
Gasoline with an ethanol content of
more than 10% can cause running
problems and major damage in engines
and should not be used.
The ethanol content in gasoline affects
engine running speed – it may be
necessary to readjust the carburetor if
you use fuels with various ethanol
contents.
WARNING
To reduce the risk of personal injury
from loss of control and/or contact with
the running cutting tool, do not use your
Adjusting the Throttle Cable
0009BA008 KN
Fitting the Harness
373BA003 KN
373BA004 KN
Fuel

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unit with incorrect idle adjustment. At
correct idle speed, the cutting tool
should not move.
If your power tool shows an incorrect idle
adjustment, have your STIHL dealer
check your power tool and make proper
adjustments and repairs.
The idle speed and maximum speed of
the engine change if you switch from a
fuel with a certain ethanol content to
another fuel with a much higher or lower
ethanol content.
This problem can be avoided by always
using fuel with the same ethanol
content.
Use only STIHL two-stroke engine oil or
equivalent high-quality two-stroke
engine oils that are designed for use
only in air cooled two-cycle engines.
We recommend STIHL HP Ultra 2-Cycle
Engine Oil since it is specially
formulated for use in STIHL engines.
Do not use BIA or TCW rated (two-
stroke water cooled) mix oils or other
mix oils that state they are for use in both
water cooled and air cooled engines
(e.g., outboard motors, snowmobiles,
chain saws, mopeds, etc.).
WARNING
Take care when handling gasoline.
Avoid direct contact with the skin and
avoid inhaling fuel vapor. When filling at
the pump, first remove the container
from your vehicle and place the
container on the ground before filling. To
reduce the risk of sparks from static
discharge and resulting fire and/or
explosion, do not fill fuel containers that
are sitting in or on a vehicle or trailer.
The container should be kept tightly
closed in order to limit the amount of
moisture that gets into the mixture.
The machine‘s fuel tank should be
cleaned as necessary.
Fuel mix ages
Only mix sufficient fuel for a few days
work, not to exceed 30 days of storage.
Store in approved fuel-containers only.
When mixing, pour oil into the container
first, and then add gasoline. Close the
container and shake it vigorously by
hand to ensure proper mixing of the oil
with the fuel.
Dispose of empty mixing-oil containers
only at authorized disposal locations.
Preparations
NBefore fueling, clean the filler cap
and the area around it to ensure that
no dirt falls into the tank.
Always thoroughly shake the mixture in
the canister before fueling your
machine.
WARNING
In order to reduce the risk of fire and
personal injury from escaping gas vapor
and fumes, remove the fuel filler cap
carefully so as to allow any pressure
build-up in the tank to release slowly.
Gaso-
line
Oil (STIHL 50:1 or equiva-
lent high-quality oils)
US gal. US fl.oz.
12.6
2 1/2 6.4
5 12.8
Fueling
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Opening the threaded filler cap
NTurn the cap counterclockwise until
it can be removed from the tank
opening.
NRemove the filler cap.
Refueling
Take care not to spill fuel while fueling
and do not overfill the tank.
Closing the threaded filler cap
NPosition cap.
NTurn the cap clockwise as far as it
will go and tighten it as securely as
possible by hand.
NOTICE
With the engine stopped and before
starting, check the air intakes between
the backplate and powerhead for
blockages and clean if necessary.
Functions of setting lever
Run position F
Engine runs or is ready to start. Throttle
trigger (2) can be moved to any position.
Switch off engine †
Ignition is interrupted, engine stops. The
setting lever (1) is not locked in this
position. It springs back to the run
position F. The ignition is switched on
again.
Fixed throttle
The throttle trigger (2) can be locked in
any position by operating the setting
lever (1).
To disengage the lock:
NReturn the setting lever (1) to the
run position F.
002BA447 KN
002BA448 KN
Information Before You Start
2
1
0009BA009 KN
2
1
0009BA010 KN

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Starting the Engine
NObserve safety precautions.
NOTICE
Start your unit on a clean, dust-free
surface only to ensure that no dust is
sucked in.
NMove the setting lever the run
position F.
NPress the manual fuel pump bulb at
least five times – even if the bulb is
filled with fuel.
Cold engine (cold start)
NTurn the choke knob to g.
Warm engine (warm start)
NTurn the choke knob to <.
Also use this setting if the engine has
been running but is still cold.
Starting
NPlace the unit securely on the
ground and make sure that
bystanders are well clear of the
nozzle outlet.
NMake sure you have a firm footing:
Hold the unit with your left hand on
the carrying handle and put one foot
against the base plate to prevent it
slipping.
NPull the starter grip slowly with your
right hand until you feel it engage
and then give it a brisk strong pull.
Do not pull out the starter rope to full
length – it might otherwise break.
NDo not let the starter grip snap back.
Guide it slowly back into the housing
so that the starter rope can rewind
properly.
NContinue cranking until the engine
runs.
Starting / Stopping the
Engine
0009BA011 KN
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Other hints on starting
If the engine stops while the choke knob
in on g or during acceleration
NMove the choke knob to < and
continue cranking until the engine
runs.
If the engine does not start
NMake sure all settings are correct
(choke knob, setting lever in run
position F).
NRepeat the starting procedure.
If fuel tank has been run completely dry
and then refueled
NPress the manual fuel pump bulb at
least five times – even if the bulb is
filled with fuel.
As soon as the engine runs
NOperate the throttle trigger.
NChoke knob automatically returns to
the run position F when the throttle
trigger is operated.
At very low outside temperatures
NOpen throttle slightly – warm up the
engine for a short period.
Shut off the engine.
NMove the setting lever in the
direction of † – the engine stops –
the setting lever springs back to the
on position.
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0009BA016 KN
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During Operation
After a long period of full throttle
operation, allow the engine to run for a
short while at idle speed so that engine
heat can be dissipated by the flow of
cooling air. This helps protect engine-
mounted components (ignition,
carburetor) from thermal overload.
After Finishing Work
Storing for a short period: Wait for the
engine to cool down. Keep the machine
in a dry place, well away from sources of
ignition, until you need it again. For
longer out-of-service periods – see
"Storing the Machine".
If there is a noticeable loss of engine
power
NTurn the filter cover lock (1)
counterclockwise to the vertical
position.
NRemove the filter cover (2).
NClean away loose dirt from around
the filter.
NPull off the adapter (3) and remove
the filter (4).
NFit a new filter element. As a
temporary measure you can knock it
out on the palm of your hand or blow
it out with compressed air. Do not
wash.
Replace any damaged parts.
Install the filter element.
NFit the filter in the filter housing and
push the retainer into position.
NRefit the filter cover and turn the
filter cover lock to the horizontal
position
Operating Instructions Cleaning the Air Filter
2431BA020 KN
1
2
3
4
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Exhaust emissions are controlled by the
design of the fundamental engine
parameters and components (e.g.
carburation, ignition, timing and valve or
port timing) without the addition of any
major hardware.
The carburetor comes from the factory
with a standard setting.
This setting provides an optimum fuel-air
mixture under most operating
conditions.
With this carburetor it is only possible to
adjust the high speed screw (H) and low
speed screw (L) within fine limits.
Preparations
NShut off the engine.
NCheck the air filter and clean or
replace if necessary.
NCheck that the throttle cable is
properly adjusted – readjust if
necessary – see chapter on
"Adjusting the Throttle Cable".
NCheck the spark arresting screen in
the muffler and clean or replace if
necessary.
Standard Setting
NTurn high speed screw (H)
counterclockwise as far as stop (no
more than 3/4 turn).
NTurn the low speed screw (L)
carefully clockwise as far as stop,
then turn it back 3/4 turn.
Adjusting Idle Speed
NCarry out the standard setting.
NStart and warm up the engine.
Engine stops while idling
NTurn the idle speed screw (LA)
clockwise until the engine runs
smoothly.
Engine Management Adjusting the Carburetor
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