STIHL BT 45 Instruction Manual
STIHL BT 45
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 - 33
Manual de instrucciones
34 - 71
Contents
English
Guide to Using this Manual 2
Safety Precautions and Working
Techniques 2
Mounting the Handles 11
Using the Unit 12
Fuel 13
Fueling 14
Gearbox 18
Original Instruction ManualPrinted on chlorine-free paper
Fitting the Auger 18
Starting / Stopping the Engine 19
Operating Instructions 21
Releasing a Trapped Auger 21
Cleaning the Air Filter 22
Engine Management 22
Adjusting the Carburetor 23
Spark Plug 24
Engine Running Behavior 25
Rewind Starter 25
Storing the Machine 25
Maintenance and Care 26
Main Parts 28
Specifications 29
Printing inks contain vegetable oils, paper can be recycled.
Maintenance and Repairs 30
Disposal 30
STIHL Incorporated Federal
Emission Control Warranty
Statement 31
Trademarks 33
Allow only persons who fully understand
this manual to operate your power drill.
To receive maximum performance and
satisfaction from your STIHL power drill,
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 power drill. 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 power drill is a high-torque,
gasoline-powered tool, some special
safety precautions must be observed to
reduce the risk of personal injury.
Careless or improper use may cause
serious or even fatal injury.
{
© ANDREAS STIHL AG & Co. KG, 2015
0458-421-8621-A. VA2.L14.
0000000420_010_GB
BT 45
This instruction manual is protected by copyright. All rights reserved, especially the rights to reproduce, translate and process
with electronic systems.
1
English
Guide to Using this Manual
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.
Fuel tank for gasoline
and engine oil mixture
Press to operate manual
fuel pump
Auger brake
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:
N A 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:
N Loosen the screw (1).
N Lever (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.
Safety Precautions and
Working Techniques
Because a power drill is a
high-torque, gasolinepowered tool, some special safety precautions
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.
Have your STIHL dealer show you how
to operate your power tool. Observe all
applicable local safety regulations,
standards and ordinances.
DANGER
Drilling into or contact
with electrical wires may
cause severe shock,
burns or death. See
"Working Conditions"
below.
WARNING
Striking a hard object in the earth with
the turning auger and the resulting
slowing or stopping of the auger creates
reactive forces. The transfer of rotational
(reactive) forces can cause the auger
powerhead and handles to rotate
suddenly in a counterclockwise direction
2
BT 45
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and can result in loss of control or cause
the handle to hit the operator or throw
him to the ground, resulting in serious
injury.
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. If the drilling tool comes in
contact with your body, it could cause
impact or cut injuries.
Use your wood boring drill only for
drilling wood. Use your planting auger
only for mass flower plantings, small
decorative posts, sign holes or deep
road fertilization. For use in existing
flower beds. Use your ice auger only for
drilling holes in ice (with ice auger
attachments).
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
power drills. 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 wood boring drill or a plant
auger 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 power tool.
WARNING
Prolonged use of a power tool (or other
machines) exposing the operator to
vibrations may produce whitefinger
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
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:
BT 45
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English
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
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
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
To reduce the risk of
injury to your eyes never
operate your power tool
unless wearing goggles
or properly fitted protective 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.
Be particularly alert and cautious when
wearing hearing protection because
your ability to hear warnings (shouts,
alarms, etc.) is restricted.
Clothing must be sturdy
and snug-fitting, but allow
complete freedom of
movement. Wear overalls
or long pants made of
heavy material to help
protect your legs. Do not
wear shorts, sandals or
go barefoot.
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.
Good footing is very
important. Wear sturdy
boots with nonslip soles.
Steel-toed safety boots
are recommended.
Wear an approved safety
hard hat to reduce the
risk of injury to your head
when there is a danger of
head injuries.
Always wear heavy duty
work gloves (e.g. made of
leather or other wear
resistant material) when
handling the machine
and the drilling tool.
Heavy-duty, nonslip
gloves improve your grip
and help to protect your
hands.
THE POWER TOOL
For illustrations and definitions of the
power tool parts see the chapter on
"Main Parts."
4
BT 45
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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, drills and
augers 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.
THE USE OF THE POWER TOOL
Transporting the Power Tool
WARNING
Always stop the engine before putting
the power drill down or carrying it.
Carrying a power drill with the engine
running is dangerous. Accidental
acceleration of the engine can cause the
drilling tool to rotate.
WARNING
During operation, the powerhead muffler
and the material around it reach
extremely high temperatures. Avoid
setting down a hot unit onto dry,
flammable material, or touching the hot
muffler, you could receive serious burns.
Carry the power drill with the drilling tool
pointing down or using a carry strap with
the drilling tool pointing to the rear – with
the hot muffler away from your body.
Remove the drilling tool before
transporting the power tool long
distances.
When transporting in a vehicle, properly
secure your power tool to prevent
turnover, fuel spillage and damage.
When the power tool is not in use, shut it
off and put it down so it cannot endanger
others.
Fuel
Your STIHL power tool uses an oil-
gasoline mixture for fuel (see the
chapter on "Fuel" of your instruction
manual).
WARNING
Gasoline is an extremely
flammable fuel. If spilled
and ignited by a spark or
other ignition source, it
can cause fire and serious 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.
Fueling Instructions
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
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.
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001BA220 KN
001BA227 KN
001BA226 KN
WARNING
In order to reduce the risk of fuel spillage
and fire from an improperly tightened
fuel cap, correctly position and tighten
the fuel cap in the fuel tank opening.
Different models may be equipped with
different fuel caps.
Toolless cap with grip
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 raised positioning
marks on the grip of the cap and on the
fuel tank opening lining up. Using the
grip, press the cap down firmly while
turning it clockwise as far as it will go
(approx. 1/4 turn).
Fold the grip flush with
the top of the cap. Grip
the cap and check for
tightness. If the grip does
not lie completely flush
with the cap and the
detent on the grip does
not fit in the corresponding recess in the filler
opening, or if the cap is
loose in the filler opening,
the cap is not properly
seated and tightened and
you must repeat the
above steps.
Misaligned, damaged or broken cap
N If the cap does not drop fully into the
opening when the positioning marks
line up and/or if the cap does not
tighten properly when twisted, the
base of the cap may be prematurely
rotated (in relation to the top) to the
closed position. Such misalignment
can result from handling, cleaning
or an improper attempt at
tightening.
Left: Base of cap in closed posi-
tion (with open space)
Right: Base of cap correctly posi-
tioned for installation
N To return the cap to the open
position for installation, turn the cap
(with the grip up) until it drops fully
into the tank opening. Next, twist the
cap counterclockwise as far as it will
go (approx. 1/4 turn) – this will twist
the base of the cap into the correct
position. Then, twist the cap
clockwise, closing it normally.
N If your cap still does not tighten
properly, it may be damaged or
broken; immediately stop use of the
unit and take it to your authorized
STIHL dealer for repair.
Screw Cap
WARNING
Unit vibrations can cause
an improperly tightened
fuel filler cap to loosen or
come off and spill quantities of fuel. In order to
reduce the risk of fuel
spillage and fire, tighten
the fuel filler cap by hand
as securely as possible.
See also the "Fueling" chapter in your
Instruction Manual for additional
information.
6
BT 45
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421BA001 KN
Before Starting
WARNING
Always check your power tool for proper
condition and operation before starting,
particularly the throttle trigger, throttle
trigger lockout, stop switch and drilling
tool or auger. The throttle trigger must
move freely and always spring back to
the idle position. Never attempt to
modify the controls or safety devices.
Regular maintenance is important in this
respect. Check the condition and the
tightness of the drilling tool.
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.
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.
WARNING
Your power drill should be started only
when it is held steady by the operator.
WARNING
To reduce the risk of loss of control, be
sure that the power drill gear is set in the
neutral position N. When the engine
starts at starting throttle, engine speed
will be fast enough for the clutch to
engage and, if the gear is not set in the
neutral position, turn the drilling tool.
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.
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.
Important Adjustments
WARNING
To reduce the risk of personal injury
from loss of control or contact with the
turning drilling tool, do not use your unit
with incorrect idle adjustment. At correct
idle speed, the drilling tool should not
move. For directions on how to adjust
idle speed, see the appropriate section
of your instruction manual.
If you cannot set the correct idle speed,
have your STIHL dealer check your
power tool and make proper
adjustments and repairs.
BT 45
7
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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.
Keep your hands in this position to have
your power drill under control at all
times.
Drilling Planting Holes
Drilling Holes in Wood
WARNING
Do not overreach. Keep proper footing
and balance at all times. Special care
must be taken in slippery conditions (wet
ground, snow, ice) and in difficult,
overgrown terrain. Watch for hidden
obstacles such as tree stumps, roots
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 or when
working with an ice auger attachment on
ice.
WARNING
To reduce the risk of injury from loss of
control, never work on a ladder, in a tree
or any other insecure support. Never
hold the machine above shoulder
height.
WARNING
Never work in a tree unless you have
received specific, professional training
for such work, are properly secured
(such as tackle and harness system or a
lift bucket), have both hands free for
operating the power tool in a cramped
environment.
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
As soon as the engine is
running, this product generates toxic exhaust
fumes containing chemicals, such as unburned
hydrocarbons (including
benzene) and carbon
monoxide, that are
known to cause respiratory problems, cancer,
birth defects, or other
reproductive harm. Some
of the gases (e.g. carbon
monoxide) may be colorless and odorless. To
reduce the risk of serious
or fatal injury / illness
from inhaling toxic fumes,
never run the machine
indoors or in poorly ventilated locations.
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. Control dust at the source
where possible. Use good work
practices, such as operating the unit so
that the wind or operating process
8
BT 45
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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.
Striking something hard
in the earth (or a hard
object in wood), such as
a rock or gravel, may
cause the drilling tool to
slow down suddenly or
stop. In such a situation,
some or all of the rotational force (reactive
force) is transferred to the
powerhead of the power
drill, which can cause the
control handle powerhead and assist-handle
to rotate suddenly in a
counterclockwise
direction.
WARNING
Work carefully in rocky ground or where
other solid objects may be present.
Keep throttle feed pressure to a
minimum. If you feel or hear the drilling
tool strike a solid object, release the
throttle trigger immediately and remove
the object before drilling is continued.
When drilling in heavy clay soil, bore
about 1/3 way and remove the auger
from the hole. Clean off auger then
continue in slow steps frequently
clearing drill.
WARNING
You should hold your power drill firmly to
control sudden jolts and reactive forces.
Be prepared to release the throttle
completely if the forces become too
great. If reactive forces are not
controlled, rotation of the handles may
result in severe jerking and loss of
control and may cause the powerhead
or assist handle to strike you or throw
you to the ground.
If the auger becomes trapped in the
drillhole, turn off the engine immediately
and remove as descripted in the chapter
entitled "Releasing a Trapped Auger."
DANGER
Contact with electrical
cables or wires can
cause serious injury or
death as a result of electrical shock. This unit is
not insulated.
WARNING
To reduce the risk of electrocution and
damage to property, always be alert for
underground pipes and cables and for
overhead wires. Before drilling, obtain
the necessary plans and permits.
Contact your local utility company or
your locator service, such as "Miss
Utility" or "One Call", for information as
to cable and pipe locations. Where
necessary, confirm actual location by
use of devices such as cable detectors
and / or by carefully dug trenches. Stay
clear of overhead electrical wires when
backing the drilling tool out of the hole. If
any portion of the machine strikes a
wire, it will cause electrical shock or
death.
WARNING
Before working with an ice auger
attachment on frozen ponds, lakes or
streams, check with local authorities and
take all necessary precautions to ensure
safe ice thickness.
WARNING
Thrown objects may ricochet and strike
the operator.
Operating Instructions
WARNING
Do not operate your power tool using the
starting throttle lock, as you do not have
control of the engine speed.
In the event of an emergency, switch off
the engine immediately – move the stop
switch to 0 or STOP.
WARNING
When taking the drilling tool out of the
hole, lift the machine vertically so that
the tool comes out straight without
canting. To minimize splashing when
drilling ice holes, back off the throttle
when the drilling tool breaks through the
ice. Raise the unit slowly. Cover and
clearly mark boreholes to prevent
anyone from stepping in a hole.
WARNING
To reduce the risk of injury from contact
with the drilling tool, always switch off
the engine and put the gear in the
BT 45
9
English
neutral position N before changing a
drilling tool. For specific instructions to
change the drilling tool see the chapter
"Fitting the Drilling Tool."
WARNING
To reduce the risk of injury, never touch
a drilling tool or drilling spindle with your
hand or any part of your body. It
continues to rotate for a short period
after the throttle lever is released.
Always shut off the engine before putting
the machine down.
WARNING
Drilling tool blades and point are sharp.
To reduce the risk of cut injuries, use
caution when operating and handling.
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.
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 of your instruction manual.
Please refer to the maintenance chart in
this manual.
WARNING
Always stop the engine and turn the
gear into the neutral position N before
doing any maintenance or repair work or
cleaning the power tool.
WARNING
Do not attempt any maintenance or
repair work not described in your
instruction manual. Have such work
performed by your STIHL servicing
dealer only.
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
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
Check condition of drilling tool at regular
short intervals. If behavior of tool
changes, check immediately for
tightness or any signs of cracks in
particular.
WARNING
Wear gloves when handling or
performing maintenance on used drilling
tools or augers.
WARNING
Replace damaged drilling tools
immediately, even if the have only
superficial cracks. Never attempt to
repair damaged drilling tools.
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 sparkarresting 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
10
BT 45
English
421BA003 KN
1
2
421BA036 KN
421BA005 KN
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 any maintenance of the emission
control system please refer to the
maintenance chart and to the limited
warranty statement near the end of the
instruction manual.
Do not clean your machine with a
pressure washer. The solid jet of water
may damage parts of the machine.
Store your power tool in a dry and 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).
Mounting the Handles
Assist handle for wood drill
Before mounting a new assist handle for
the first time:
N Hold the handle (1) by the clamp
and turn it clockwise until the
gap (2) is completely closed.
This breaks the small plastic retainer in
the clamp and allows the clamp to be
opened up.
Normal mounting procedure
N Hold the clamp firmly and unscrew
the handle counterclockwise.
N Open up the clamp slightly.
N Push the handle over the chuck until
it butts against the machine – the
clamp must engage the groove on
the gearbox housing.
N Screw the handle into clamp
clockwise.
N Move the handle to the required
position and tighten it down firmly.
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421BA037 KN
3
4
3
5
421BA007 KN
421BA002 KN
Assist handle for planting auger
N Loosen the two wing screws (3) on
the flange (4).
N Make sure the polymer bushing is
properly seated (see arrow).
N Push the flange onto the machine
as far as stop and line it up.
N Insert the handle tube (5) in the
flange.
N Move the handle to the required
position and tighten down the two
wing screws firmly.
Using the Unit
Your power drill can be used for a range
of applications, e.g. fence-building and
carpentry (kit for wood drill) and in
landscaping and gardening (kit for
planting hole auger).
General
WARNING
To change the drilling tool, always shut
off the engine and set the rotary knob
to N.
Always fit the assist handle specified for
the drilling tool you intend to use. See
"Mounting the Handles".
WARNING
During operation, always hold the
machine firmly with both hands to
control unexpected reactive forces
caused by the drilling tool jamming in or
passing through the material.
Working with the planting hole auger
N Make sure you have a safe and
secure footing.
WARNING
During operation, always hold the
machine firmly with both hands to
control unexpected reactive forces that
may occur if the drilling tool jams, e.g. in
rocky ground. Release the throttle
trigger if the drilling tool jams.
The planting hole auger should be
operated only with the gearbox set to
position 1. The tool speed is too high for
drilling planting holes when the gearbox
is set to poistion 2.
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421BA009 KN
Working with a wood drill or twist drill
N Make sure you have a safe and
secure footing.
WARNING
During operation, always hold the
machine firmly with both hands to
control unexpected reactive forces
caused by the drilling tool jamming in or
passing through the wood. Release the
throttle trigger if the drilling tool jams.
Drilling tool jammed
See "Releasing a Trapped Auger".
Fuel
This engine is certified to operate on
unleaded gasoline and the STIHL twostroke engine oil at a mix ratio of 50:1.
Your engine requires a mixture of highquality 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
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 (twostroke 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.
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547BA009 KN
001BA240 KN
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.
Gasoline
Oil (STIHL 50:1 or equivalent high-quality oils)
US gal. US fl.oz.
12.6
2 1/2 6.4
512.8
Dispose of empty mixing-oil containers
only at authorized disposal locations.
Fueling
Preparations
N Before 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.
N Position the machine so that the
filler cap is facing up.
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
Filler cap markings
Filler caps and fuel tanks may be
marked in different ways.
Depending on the version, your unit may
be equipped with a filler cap and fuel
tank with or without symbols.
Left: Filler cap without symbols.
Right: Filler cap with markings and
symbols on cap and tank.
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001BA218 KN
001BA219 KN
001BA224 KN
001BA220 KN
001BA221 KN
001BA222 KN
001BA223 KN
001BA225 KN
Filler cap without symbols
Opening
N Raise handle.
N Twist filler cap counterclockwise
(approx. 1/4 turn).
N Remove the filler cap.
Refueling
Take care not to spill fuel while fueling
and do not overfill the tank – leave
approx. 1/2" (13 mm) air space.
Closing
Handle is in an upright position:
N Insert the cap – positioning marks
on the cap and the fuel tank opening
must line up.
N The cap should drop fully into the
opening in this position.
N Push the filler cap down and twist it
clockwise until it engages.
N Flip the handle down.
Checking for proper closure
N The lug on the grip must engage
entirely in the recess (arrow), and
the grip must lie completely flush
with the top of the cap.
N Grip the cap and check for
tightness.
N If the cap can be moved, it is not
properly installed.
Misalignment of the cap parts
N If the cap does not drop fully into the
opening when the positioning marks
line up and/or if the cap does not
tighten properly when twisted, the
base of the cap may be rotated out
of position vis-à-vis the top.
N Such misalignment can result from
handling, cleaning or an improper
attempt at tightening.
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001BA227 KN
001BA226 KN
001BA236 KN
001BA232 KN
001BA234 KN
001BA237 KN
001BA234 KN
Filler cap with markings and symbols
Opening
Left: Base of improperly aligned
cap (with open space)
Right: Base of cap correctly posi-
tioned for installation
N To correct a misalignment, turn the
cap (with the grip up) until it drops
fully into the tank opening.
N Twist the cap counterclockwise as
far as it will go (approx. 1/4 turn) –
this will twist the base of the cap into
the correct position.
N Twist the cap clockwise, closing it
normally – see the sections
"Closing" and "Checking for proper
closure."
N If your cap still does not tighten
properly, it may be damaged or
broken; immediately stop use of the
unit and take it to your authorized
STIHL dealer for repair.
N Raise handle.
N Twist filler cap counterclockwise
(approx. 1/4 turn).
Markings on filler cap and housing must
align.
N Remove the filler cap.
Refueling
Take care not to spill fuel while fueling
and do not overfill the tank – leave
approx. 1/2" (13 mm) air space.
Closing
Handle is in an upright position:
N Position filler cap – markings on filler
cap and housing must align.
N Push the filler cap down as far as it
will go.
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001BA233 KN
001BA231 KN
001BA235 KN
001BA241 KN
1
001BA238 KN
001BA239 KN
N Push the filler cap down and twist it
clockwise until it engages.
Then the markings on filler cap and
housing will align.
N Flip the handle down.
Filler cap is now closed.
If the filler cap will not engage into the
tank housing
The base of the filler cap is rotated in
relation to the upper part.
N Look at the black alignment marks
on the top of the filler cap.
Left: Base of filler cap is rotated –
interior marking (1) is aligned
with the exterior marking.
Right: Base of filler cap is in the cor-
rect position – interior
marking is below the clip. It
does not align with the exterior marking.
N With the filler cap in the filling neck,
twist it counterclockwise until it
drops into its seat.
N Continue to twist the filler cap
counterclockwise (approx. 1/4 turn)
– this will twist the base of the cap
into the correct position.
N While pushing down on the cap,
twist the filler cap clockwise and
close it – see section "Closing."
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421BA017 KN
421BA018 KN
1
2
Gearbox
The power drill is equipped with a
change-speed gearbox. Depending on
the application and the drilling tool used,
the speed can be adjusted to suit
requirements.
WARNING
Do not change the position of the rotary
knob while the engine is running above
idle speed – the drilling tool rotates.
N Neutral: Gearbox in neutral for
starting, adjusting the carburetor
and changing the drilling tool.
1 Low-speed clockwise rotation, see
"Specifications"
2 High-speed clockwise rotation, see
"Specifications"
R Counterclockwise rotation, e.g. for
releasing a trapped drilling tool
Fitting the Auger
N With the engine stopped (knob in N
position), place the machine on the
ground and make sure it is secure.
Chuck for wood drills or twist drills
N Insert the drilling tool (1) in the
chuck (2) and tighten it firmly.
WARNING
When using the geared rim drill chuck
(special accessory), make sure you
remove the chuck key before starting up.
Knob positions
NOTICE
The position of the rotary knob may be
changed only when the engine is
running at idle speed – the drilling
spindle must be stationary. It may be
necessary to turn the drilling spindle
slightly before the rotary knob can be
moved to the required position.
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5
421BA039 KN
4
3
421BA020 KN
4
1
421BA021 KN
2
3
Adapter for planting hole auger
N Screw the adapter (3) onto the
drilling spindle (4).
N Use a 13mm open-end wrench to
hold the spindle steady and tighten
the adapter firmly with a 19mm
open-end wrench.
N Secure the drilling tool (5) in the
adapter.
N Use a 17mm open-end wrench to
secure and release the planting
hole auger.
Starting / Stopping the
Engine
N Set rotary knob to N (gearbox in
neutral).
WARNING
The machine may only be started with
the gearbox in neutral. If left in positions
1, 2 and R, the drilling tool may begin to
rotate when the clutch engagement
speed is reached. This could result in
accidents or personal injury due to loss
of control.
Starting the Engine
N Depress the choke lever (1) and set
it to
l if the engine is cold
j for warm start – also use this posi-
tion if the engine has been running
but is still cold.
N Move the stop switch (2) to F and
N squeeze the throttle trigger (3) and
hold it there.
N Press in the starting throttle lock (4)
and hold it there.
N Let go of the throttle trigger and
starting throttle lock. This is the
starting throttle position.
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421BA022 KN
5
421BA001 KN
421BA023 KN
N Press the manual fuel pump
bulb (5) at least five times.
Cranking
N Place the unit on the ground so that
it is secure.
N Press the machine against the
ground with your left hand on the
engine housing.
N Pull 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.
Do not let the starter grip snap back.
Guide it slowly back into the housing
so that the starter rope can rewind
properly.
When engine begins to fire
N Set choke lever to j and
N continue cranking.
As soon as the engine runs
N Blip the throttle trigger – the starting
throttle lock moves to the normal run
position and the engine returns to
idling speed.
Stopping the Engine
N Move the stop switch to 0.
At very low outside temperatures
N As soon as the engine runs: Blip the
throttle trigger to disengage the
starting throttle lock – it moves to the
normal run position and the engine
returns to idle speed.
N Open throttle slightly – warm up the
engine for a short period.
If engine does not start
If you did not move the choke lever
quickly enough to j (warm start) after
the engine began to fire, the engine is
flooded.
N Set choke lever to j and
N Set the throttle trigger to the starting
throttle position.
N Start the engine by pulling the
starter rope briskly – 10 to 20 pulls
may be necessary.
If the engine still does not start
N Remove the spark plug – see
"Spark Plug".
N Dry the spark plug.
N Open the throttle wide.
N Crank the engine several times with
the starter to clear the combustion
chamber.
N Install the spark plug – see "Spark
Plug".
N Move the stop switch to F and
N set choke lever to j – (warm start
position) even if the engine is cold.
N Now start the engine.
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421BA025 KN
If fuel tank has been run completely dry
and then refueled
N Press the fuel pump bulb at least
five times.
N Now start the engine.
Operating Instructions Releasing a Trapped Auger
During break-in period
A factory-new machine should not be
run at high revs (full throttle off load) for
the first three tank fillings. This avoids
unnecessary high loads during the
break-in period. As all moving parts
have to bed in during the break-in
period, the frictional resistances in the
engine are greater during this period.
The engine develops its maximum
power after about 5 to 15 tank fillings.
During Operation
After a long period of full throttle
operation, allow the engine to run for a
short while at idle speed so that engine
heat can be dissipated by the flow of
cooling air. This protects enginemounted components (ignition,
carburetor) from thermal overload.
After Finishing Work
Storing for a short period: Wait for the
engine to cool down. Empty the fuel tank
and keep the machine in a dry place,
well away from sources of ignition, until
you need it again. For longer out-ofservice periods – see "Storing the
Machine".
If the auger jams in the drill hole
N Let go of the throttle trigger so that
the engine returns to idling speed.
N Move rotary knob to R position
(counterclockwise rotation) – it may
be necessary to rotate the machine
a little until the knob can be moved
to the required position.
N Hold the machine firmly with both
hands on the handles.
N Operate the throttle trigger.
N Increase engine speed and slowly
pull the drilling tool out of the drill
hole.
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