Stihl BT 45 Instruction Manual
STIHL BT 45
Instruction Manual
Contents
English
Guide to Using this Manual 2
Safety Precautions and Working
Techniques 2
Mounting the Handles 7
Using the Unit 8
Fuel 10
Fueling 11
Gearbox 14
Original Instruction ManualPrinted on chlorine-free paper
Fitting the Auger 15
Starting / Stopping the Engine 15
Operating Instructions 17
Releasing a Trapped Auger 18
Cleaning the Air Filter 18
Adjusting the Carburetor 19
Spark Plug 20
Engine Running Behavior 21
Storing the Machine 21
Maintenance and Care 22
Minimize Wear and Avoid Damage 23
Main Parts 24
Specifications 25
Maintenance and Repairs 26
Printing inks contain vegetable oils, paper can be recycled.
Disposal 26
EC Declaration of Conformity 26
Dear Customer,
Thank you for choosing a quality
engineered STIHL product.
It has been built using modern
production techniques and
comprehensive quality assurance.
Every effort has been made to ensure
your satisfaction and trouble-free use of
the product.
Please contact your dealer or our sales
company if you have any queries
concerning this product.
Your
Dr. Nikolas Stihl
© ANDREAS STIHL AG & Co. KG, 2020
0458-421-0121-A. VA9.E20.
0000000418_016_GB
BT 45
This instruction manual is protected by copyright. All rights reserved, especially the rights to reproduce, translate and process
with electronic systems.
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English
Guide to Using this Manual
Pictograms
The meanings of the pictograms
attached to the machine are explained in
this manual.
Depending on the model concerned, the
following pictograms may be attached to
your machine.
Fuel tank; fuel mixture of
gasoline and engine oil
Operate manual fuel
pump
Symbols in text
WARNING
Warning where there is a risk of an
accident or personal injury or serious
damage to property.
NOTICE
Caution where there is a risk of
damaging the machine or its individual
components.
Engineering improvements
STIHL's philosophy is to continually
improve all of its products. For this
reason we may modify the design,
engineering and appearance of our
products periodically.
Therefore, some changes, modifications
and improvements may not be covered
in this manual.
Safety Precautions and
Working Techniques
Special safety precautions must be taken when
working with this machine
due to the high torque
and partly very high rotational speed of the drill
and because the augers
have sharp edges.
It is important you read
and understand the User
Manual before first use
and keep it in a safe
place for future reference. Non-compliance
with the User Manual
may cause serious or
even fatal injury.
Observe all applicable local safety
regulations, e.g. by trade organizations,
social insurance institutions, labor safety
authorities etc.
If you have never used a power tool
before: Have your dealer or other
experienced user show you how to
operate your machine – or attend a
special course to learn how to operate it.
Minors are not allowed to work with the
power tool – except adolescents above
16 years of age who are instructed
under supervision.
Children, animals and bystanders must
not be allowed near the machine.
When not using the machine, it must be
laid down in such a way that it does not
endanger anyone. Ensure that the
machine cannot be used without
authorization.
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English
The user is responsible for accidents or
risks involving third parties or their
property.
Do not lend or rent your power tool
without the User Manual. Be sure that
anyone using it understands the
information contained in this manual.
The use of machines that emit noise
may be limited to certain hours of the
day as specified by national and/or
regional or local regulations.
Anyone operating the machine must be
well rested, in good physical health and
in good mental condition.
If you have any condition that might be
aggravated by strenuous work, check
with your doctor before operating a
machine.
If you have a pacemaker: The ignition
system of your machine produces an
electromagnetic field of very low
intensity. This field may interfere with
some pacemakers. STIHL recommends
that persons with pacemakers consult
their physician and the pacemaker
manufacturer to reduce any health risk.
Anyone who has consumed alcohol or
drugs or medicines affecting their ability
to react must not operate a power tool.
Depending on the drilling tool and
attachments mounted, use your power
tool only for drilling holes in wood, holes
for plants (shallow holes in loosened
soil) or holes in ice.
It must not be used for any other
purposes.
Before drilling, make sure that there are
no lines (e. g. for gas, water, electricity)
at the drilling sites:
– Obtain information from the local
utility companies
– If in doubt, check the existence of
lines with detectors or test
excavations
Only use augers or accessories which
have been approved by STIHL for this
machine or which are technically
equivalent. If you have any questions in
this respect, consult your dealer. Use
only high quality parts and accessories.
in order to avoid the risk of accidents
and damage to the machine.
STIHL recommends the use of original
STIHL tools and accessories. They are
specifically designed to match the
product and meet your performance
requirements.
Never attempt to modify your power tool
in any way since this may increase the
risk of personal injury. STIHL excludes
all liability for personal injury and
damage to property caused while using
unauthorized attachments.
Do not use a high-pressure washer to
clean the power tool. The solid jet of
water may damage parts of the unit.
Clothing and equipment
Wear proper protective clothing and
equipment.
Clothing must be sturdy
but allow complete freedom of movement. Wear
close-fitting clothes such
as a boiler suit, not a
loose jacket.
Do not wear clothing which could
become trapped in wood, brush or
moving parts of the machine. Do not
wear a scarf, necktie or jewelry.
Tie up and confine long
hair above your
shoulders.
Wear sturdy shoes with non-slip soles.
WARNING
To reduce the risk of eye
injuries, wear close-fitting safety glasses in
accordance with European Standard EN 166.
Make sure the safety
glasses are a snug fit.
Wear hearing protection, e.g. ear
defenders.
Wear sturdy protective
gloves made of a resistant material (e. g.
leather).
STIHL can supply a comprehensive
range of personal protective equipment.
Transporting the machine
BT 45
Always stop the engine.
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English
Carry the machine with the drilling tool
pointing down – keep the hot muffler
away from your body.
It is also possible to use a shoulder strap
(special accessory).
By vehicle: When transporting in a
vehicle, properly secure your machine to
prevent turnover, damage and fuel
spillage.
Refueling
Gasoline is highly flammable – keep away from
fire or flame – do not spill
any fuel – no smoking.
Always shut off the engine before
refueling.
Do not fuel a hot engine – fuel may spill
and cause a fire.
Open the fuel cap carefully to allow any
pressure build-up in the tank to release
slowly and avoid fuel spillage.
Only refuel the machine in a well
ventilated place. If fuel has been spilled,
immediately clean the machine – do not
allow your clothes to be splashed with
fuel. If that happens, change your
clothes at once.
Place the clip lock fuel
cap (bayonet-type) in
position, turn it until it will
go no further and fold the
clip lock down.
Check for fuel leakage
while refueling and during
operation. Never start the
engine if fuel has been
spilled or is leaking –
Fatal burns may result!
Before starting
Check that your power tool is properly
assembled and in good condition – refer
to appropriate chapters in the instruction
manual.
– Check the fuel system for leaks,
especially the visible parts, e. g.,
fuel cap, hose connections, manual
fuel pump (only in machines with a
manual fuel pump). In case of
leakage and damage, do not start
the engine – risk of fire! Have the
machine serviced by a dealer
before using it
– Slide control / stop switch must
move easily to STOP or 0
– Additional front assist handle
properly mounted to suit drilling tool
being used.
– Smooth action of throttle trigger and
starting throttle lock – throttle trigger
must return automatically to idle
position.
– Check that the spark plug boot is
secure – a loose boot may cause
arcing that could ignite combustible
fumes and cause a fire!
– Never attempt to modify the controls
or safety devices
– Keep the handles dry and clean –
free from oil and dirt – this is
important for safe control of the
machine
To reduce the risk of personal injury, do
not operate your power tool if it is
damaged or not properly assembled!
Starting the engine
Start the engine at least 3 meters from
the fueling spot, outdoors only.
Place the machine on a flat surface and
ensure a firm and safe footing, hold the
machine firmly. The auger must not
touch any objects or the ground because
it may begin to rotate when the machine
is started.
Gearbox in neutral – knob in N.position.
The machine is operated by a single
person only – do not allow any person to
stay within the working area – nor with
starting. To reduce the risk of injury,
avoid contact with the drilling tool.
Do not drop-start the engine – start it as
described in the User Manual.
Check idle speed setting: The drilling
tool must not rotate when the engine is
idling with the throttle trigger released.
Keep easily combustible materials (e.g.,
wood chips, bark, dry grass, fuel) away
from hot exhaust gases and the hot
muffler surface – risk of fire!
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Holding and guiding the machine
Always hold the unit firmly with both
hands on the handles.
Make sure you always have good
balance and secure footing.
Wrap your fingers and thumbs around
the handles. Right hand on control
handle, left hand on the assist handle,
even if you are left-handed.
Drilling planting holes and ice holes
Drilling holes in wood
While working
In the event of impending danger or in
an emergency, switch off the engine
immediately by moving the slide control
/ stop switch to 0 or STOP.
Do not allow any other persons in the
work area. To reduce the risk of injury,
keep a sufficiently safe distance away
from other persons.
Check for correct idling, so that the
auger stops turning when the throttle
trigger is released. If the drilling tool
continues to rotate when the engine is
idling, have the machine checked by
your servicing dealer. Check and correct
the idle speed setting at regular
intervals.
Take special care in slippery conditions
– damp, snow, ice, on slopes or uneven
ground.
Watch out for obstacles: tree stumps,
roots – risk of tripping or stumbling!
Make sure you always have good
balance and secure footing.
When working at heights:
– Always use a lift bucket
– Never use the machine while
standing on a ladder or in a tree
– Never work on an insecure support
– Never work above shoulder height
– Never use the machine with just one
hand
Be particularly alert and cautious when
wearing hearing protection because
your ability to hear warnings (shouts,
alarms, etc.) is restricted.
Take breaks when you start getting tired
or feeling fatigue – risk of accidents!
Work calmly and carefully – in daylight
conditions and only when visibility is
good. Proceed with caution, do not put
others in danger.
BT 45
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As soon as the engine is
running, the power
machine generates toxic
exhaust gas. These
gases may be odorless
and invisible and may
contain unburned hydrocarbons and benzene.
Never run the engine
indoors or in poorly ventilated locations, even if
your model is equipped
with a catalytic converter.
To reduce the risk of serious or fatal
injury from breathing toxic fumes,
ensure proper ventilation when working
in trenches, hollows or other confined
locations. This reduces the risk of
serious or fatal injury from breathing
toxic fumes.
Stop work immediately if you start
suffering from nausea, headaches,
impaired vision (e.g. your field of vision
gets smaller), impaired hearing,
dizziness, or impaired concentration –
these symptoms may possibly be the
result of too-high exhaust gas
concentration – Risk of accidents!
Operate your power tool so that it
produces a minimum of noise and
emissions – do not run the engine
unnecessarily, accelerate the engine
only when working.
Dust (e.g. wood dust), fumes and smoke
may be produced while working may be
hazardous to health! Wear a dust mask
in case of dust formation.
No smoking when working with or near
the machine – risk of fire! Combustible
fuel vapor may escape from the fuel
system.
If your power tool is subjected to
unusually high loads for which it was not
designed (e.g. heavy impact or a fall),
always check that it is in good condition
before continuing work – see also
"Before Starting". Check in particular
that the fuel system has no leaks and the
safety equipment is fully operative.
Never use a power tool that is no longer
safe to operate. In case of doubt, contact
a dealer.
Do not operate your power tool in the
starting throttle position – engine speed
cannot be controlled in this position.
Only touch the drill and the drill spindle if
the engine is stopped and the gear stick
is in idle position (position N) – Risk of
injury!
Avoid contact with lines
carrying electrical current – Risk of electrical
shock!
Hold the machine firmly so that sudden
jolts can be absorbed – only apply a
small amount of pressure when drilling.
Take particular care when working in
stony areas or ground with roots.
Cover drilled holes and make safe.
To change the drilling tool, stop the
engine and put the gear in idle position
(position N) – Risk of injury!
Do not touch machine parts, particularly
the muffler – Risk of burn injuries.
Before you leave the machine: Shut the
engine off.
Regularly check that the auger is in
perfect working condition. Replace
damaged or blunt augers immediately.
Vibrations
Prolonged use of the power tool may
result in vibration-induced circulation
problems in the hands (whitefinger
disease).
No general recommendation can be
given for the length of usage because it
depends on several factors.
The period of usage is prolonged by:
– Hand protection (wearing warm
gloves)
– Work breaks
The period of usage is shortened by:
– Any personal tendency to suffer
from poor circulation (symptoms:
frequently cold fingers, tingling
sensations).
– Low outside temperatures.
– The force with which the handles
are held (a tight grip restricts
circulation).
Continual and regular users should
monitor closely the condition of their
hands and fingers. If any of the above
symptoms appear (e.g. tingling
sensation in fingers), seek medical
advice.
Maintenance and Repairs
Service the machine regularly. Do not
attempt any maintenance or repair work
not described in the instruction manual.
Have all other work performed by a
servicing dealer.
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BT 45
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421BA003 KN
1
2
STIHL recommends that you have
servicing and repair work carried out
exclusively by an authorized STIHL
servicing dealer. STIHL dealers are
regularly given the opportunity to attend
training courses and are supplied with
the necessary technical information.
Only use high-quality replacement parts
in order to avoid the risk of accidents
and damage to the machine. If you have
any questions in this respect, consult a
servicing dealer.
STIHL recommends the use of genuine
STIHL replacement parts. They are
specifically designed to match your
model and meet your performance
requirements.
To reduce the risk of injury, always shut
off the engine before carrying out any
maintenance or repairs or cleaning the
machine. – Exception: Carburetor and
idle speed adjustments.
Do not turn the engine over on the
starter with the spark plug boot or spark
plug removed unless the slide control /
stop switch is on STOP or 0 since there
is otherwise a risk of fire from
uncontained sparking.
To reduce the risk of fire, do not service
or store your machine near open flames.
Check the fuel filler cap for leaks at
regular intervals.
Use only a spark plug of the type
approved by STIHL and make sure it is
in good condition – see "Specifications".
Inspect the ignition lead (insulation in
good condition, secure connection).
Check the condition of the muffler.
To reduce the risk of fire and damage to
hearing, do not operate your machine if
the muffler is damaged or missing.
Do not touch a hot muffler since burn
injury will result.
Vibration behavior is influenced by the
condition of the AV elements – check the
AV elements at regular intervals.
Mounting the Handles
Assist handle for wood drill
Before mounting a new wood drill 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.
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421BA036 KN
421BA005 KN
421BA037 KN
3
4
3
5
421BA007 KN
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.
Assist handle for planting hole auger
and ice 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), in
landscaping and gardening (kit for
planting hole auger) and ice fishing (kit
for ice 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.
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BT 45
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