{
STIHL BT 45
Instruction Manual
English
© ANDREAS STIHL AG & Co. KG, 2017
0458-421-0121-A. VA1.B17.
0000000418_012_GB
Printed on chlorine-free paper
Printing inks contain vegetable oils, paper can be recycled.
Original Instruction Manual
Contents
Guide to Using this Manual
Safety Precautions and Working
Techniques
Mounting the Handles
Using the Unit
Fuel
Fueling
Gearbox
Fitting the Auger
Starting / Stopping the Engine
Operating Instructions
Releasing a Trapped Auger
Cleaning the Air Filter
Adjusting the Carburetor
Spark Plug
Engine Running Behavior
Storing the Machine
Maintenance and Care
Minimize Wear and Avoid Damage
Main Parts
Specifications
Maintenance and Repairs
Disposal
EC Declaration of Conformity
{
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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 troublefree use of
the product.
Please contact your dealer or our sales
company if you have any queries
concerning this product.
Your
Dr. Nikolas Stihl
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 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 observed
when working with this
power tool because of its
high torque and the high
speed of the auger in certain applications, and
because the augers have
sharp edges.
It is important that you
read the instruction manual before first use and
keep it in a safe place for
future reference. Nonobservance of the
instruction manual may
result in serious or even
fatal injury.
Observe all applicable local safety
regulations, standards and ordinances.
If you have not used this type of power
tool before: Have your dealer or other
experienced user show you how to
operate your machine or attend a
special course in its operation.
Minors should never be allowed to use a
power tool.
Keep bystanders, especially children,
and animals away from the work area.
When the power tool is not in use, shut it
off so that it does not endanger others.
Secure it against unauthorized use.
The user is responsible for avoiding
injury to third parties or damage to their
property.
2
BT 45
English
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.
Before drilling, make sure there are no
buried power cables or supply pipes in
the work area (e.g. for gas, water,
electricity):
The use of noise emitting power tools
may be restricted to certain times by
national or local regulations.
–
Contact your local utility company
for information on cable and pipe
locations.
To operate the power tool you must be
rested, in good physical condition and
mental health.
–
Where necessary, confirm actual
location with cable detectors and/or
by carefully dug trenches.
If you have any condition that might be
aggravated by strenuous work, check
with your doctor before operating a
power tool.
Only use drilling tools and accessories
that are explicity approved for this power
tool by STIHL or are technically
identical. If you have any questions in
this respect, consult a servicing dealer.
Use only high quality tools and
accessories in order to avoid the risk of
accidents and damage to the machine.
Persons with pacemakers only: The
ignition system of your power tool
produces an electromagnetic field of a
very low intensity. This field may
interfere with some pacemakers. STIHL
recommends that persons with
pacemakers consult their physician and
the pacemaker manufacturer to reduce
any health risk.
Do not operate the power tool if you are
under the influence of any substance
(drugs, alcohol) which might impair
vision, dexterity or judgment.
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.
Do not use your power tool for any other
purpose.
STIHL recommends the use of genuine
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 pressure washer to clean
the unit. The solid jet of water may
damage parts of the unit.
Avoid clothing that could get caught on
branches or brush or moving parts of the
machine. Do not wear a scarf, necktie or
jewelry.
Tie up and confine long
hair (e.g. with a hair net,
cap, hard hat, etc.).
Wear sturdy shoes with non-slip soles.
WARNING
To reduce the risk of eye
injuries, wear snug-fitting
safety glasses in accordance with European
Standard EN 166. Make
sure the safety glasses
are a good fit.
Wear hearing protection, e.g. earplugs
or ear muffs.
Wear heavy-duty work
gloves made of durable
material (e.g. leather).
Clothing and Equipment
Wear proper protective clothing and
equipment.
BT 45
Clothing must be sturdy
but allow complete freedom of movement. Wear
snug-fitting clothing, an
overall and jacket combination, do not wear a
work coat.
STIHL offers a comprehensive range of
personal protective clothing and
equipment.
3
English
Transporting the Power Tool
Check for leakage. To
reduce the risk of serious
of fatal burn injuries, do
not start or run the engine
until leak is fixed.
Always turn off the engine.
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).
Transporting by vehicle: Properly secure
your power tool to prevent turnover, fuel
spillage and damage.
Before Starting
Check that your power tool is properly
assembled and in good condition – refer
to appropriate chapters in the instruction
manual.
–
Fueling
Gasoline is an extremely
flammable fuel. Keep
clear of naked flames. Do
not spill any fuel – do not
smoke.
Check the fuel system for leaks,
paying special attention to visible
parts such as the tank cap, hose
connections and the manual fuel
pump (on machines so equipped). If
there are any leaks or damage, do
not start the engine – risk of fire.
Have your machine repaired by a
servicing dealer before using it
again.
To reduce the risk of accidents, 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 unit on level ground, make
sure you have secure footing, hold the
unit securely. Check that the drilling tool
is not touching the ground or any other
object since it may begin to rotate when
the engine starts.
Gearbox in neutral – knob in N.position.
Your power tool is designed to be
operated by one person only. Do not
allow other persons in the work area –
even when starting. To reduce the risk of
injury, avoid contact with the drilling tool.
Always shut off the engine before
refueling.
–
Do not fuel a hot engine – fuel may spill
and cause a fire.
Slide control / stop switch must
move easily to STOP or 0.
Do not drop start the power tool – start
the engine as described in the
instruction manual.
–
Open the fuel cap carefully to allow any
pressure build-up in the tank to release
slowly and avoid fuel spillage.
Additional front assist handle
properly mounted to suit drilling tool
being used.
Check idle speed setting: The drilling
tool must not rotate when the engine is
idling with the throttle trigger released.
–
Fuel your power tool only in wellventilated areas. If you spill fuel, wipe
the machine immediately – if fuel gets on
your clothing, change immediately.
Smooth action of throttle trigger and
starting throttle lock – throttle trigger
must return automatically to idle
position.
To reduce the risk of fire, keep hot
exhaust gases and hot muffler away
from easily combustible materials (e.g.
wood chips, bark, dry grass, fuel).
–
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 in any way.
Insert the fuel cap with
hinged grip (bayonet-type
cap) correctly in the
opening, turn it clockwise
as far as stop and fold the
grip down.
4
–
Keep the handles dry and clean –
free from oil and dirt – for safe
control of the power tool.
Holding and Controlling the Power Tool
Always hold the power tool firmly with
both hands on the handles.
Make sure you always have good
balance and secure footing.
BT 45
English
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
The correct engine idle speed is
important to ensure that the drilling tool
stops rotating when you let go of the
throttle trigger. 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 regularly.
Take special care in slippery conditions
(ice, wet ground, snow), on slopes or
uneven ground.
Watch out for obstacles: Roots and tree
stumps which could cause you to trip or
stumble.
Make sure you always have good
balance and secure footing.
When working at heights:
Drilling holes in wood
–
Always use a lift bucket
–
Never work on a ladder or in a tree
–
Never work on an insecure support
–
Do not work above shoulder height
–
Never operate your power tool with
one hand
Be particularly alert and cautious when
wearing hearing protection because
your ability to hear warnings (shouts,
alarms, etc.) is restricted.
During Operation
To reduce the risk of accidents, take a
break in good time to avoid tiredness or
exhaustion.
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.
Work calmly and carefully – in daylight
conditions and only when visibility is
good. Stay alert so as not to endanger
others.
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.
BT 45
5
English
Your power tool produces
toxic exhaust fumes as
soon as the engine is
running. These fumes
may be colorless and
odorless and contain
unburned hydrocarbons
and benzol. Never run
the engine indoors or in
poorly ventilated locations, even if your model
is equipped with a catalytic converter.
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.
To reduce the risk of accidents, stop
work immediately in the event of
nausea, headache, visual disturbances
(e.g. reduced field of vision), problems
with hearing, dizziness, deterioration in
ability to concentrate. Apart from other
possibilities, these symptoms may be
caused by an excessively high
concentration of exhaust gases in the
work area.
Operate your power tool so that it
produces a minimum of noise and
emissions – do not run the engine
unnecessarily, accelerate the engine
only when working.
The dusts (e.g. sawdust), vapor and
smoke produced during operation may
be dangerous to health. If dust levels are
very high, wear a suitable respirator.
To reduce the risk of fire, do not smoke
while operating or standing near your
power tool. Note that combustible fuel
vapor may escape from the fuel system.
6
If your power tool is subjected to
unusually high loads for which it was not
designed (e.g. heavy impact or a fall),
always check that it is in good condition
before continuing work – see also
"Before Starting". Check the fuel system
in particular for leaks and make sure the
safety devices are working properly. Do
not continue operating your power tool if
it is damaged. In case of doubt, consult
your servicing dealer.
Check condition of augers regularly.
Replace damaged or dull augers
immediately.
Do not operate your power tool in the
starting throttle position – engine speed
cannot be controlled in this position.
No general recommendation can be
given for the length of usage because it
depends on several factors.
To reduce the risk of injury, never touch
the drilling tool or drilling spindle unless
the engine is stopped and the gearbox is
in neutral (knob in N position).
The period of usage is prolonged by:
Avoid contact with electrical cables or wires – risk
of electric shock.
Hold the machine firmly in order to
control sudden jolts and reactive forces
– keep feed pressure relatively low.
Work particularly carefully in rocky
ground or ground with a heavy root
structure.
Cover and clearly mark boreholes.
To reduce the risk of injury, always shut
off the engine and set the gearbox to
neutral (knob in N position) before
changing the drilling tool.
Vibrations
Prolonged use of the power tool may
result in vibration-induced circulation
problems in the hands (whitefinger
disease).
–
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.
To avoid serious burn injuries, avoid
touching hot parts of the machine,
especially the muffler.
Before leaving the power tool
unattended: Shut off the engine.
BT 45
English
Service the machine regularly. Do not
attempt any maintenance or repair work
not described in the instruction manual.
Have all other work performed by a
servicing dealer.
STIHL recommends that you have
servicing and repair work carried out
exclusively by an authorized STIHL
servicing dealer. STIHL dealers are
regularly given the opportunity to attend
training courses and are supplied with
the necessary technical information.
Only use high-quality replacement parts
in order to avoid the risk of accidents
and damage to the machine. If you have
any questions in this respect, consult a
servicing dealer.
STIHL recommends the use of 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.
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.
Mounting the Handles
Assist handle for wood drill
Before mounting a new wood drill assist
handle for the first time
Do not touch a hot muffler since burn
injury will result.
2
1
Vibration behavior is influenced by the
condition of the AV elements – check the
AV elements at regular intervals.
421BA003 KN
Maintenance and Repairs
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.
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.
BT 45
7
English
Assist handle for planting hole auger
and ice auger
421BA036 KN
3
N
Push the handle over the chuck until
it butts against the machine – the
clamp must engage the groove on
the gearbox housing.
4
N
Loosen the two wing screws (3) on
the flange (4).
N
Make sure the polymer bushing is
properly seated (see arrow).
Screw the handle into clamp
clockwise.
N
Move the handle to the required
position and tighten it down firmly.
8
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.
General
WARNING
Always fit the assist handle specified for
the drilling tool you intend to use. See
"Mounting the Handles".
421BA007 KN
N
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).
To change the drilling tool, always shut
off the engine and set the rotary knob
to N.
5
421BA005 KN
Open up the clamp slightly.
421BA037 KN
3
N
Using the Unit
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.
BT 45
English
N
Before stepping on the ice, check its
carrying capacity.
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
penetrating the ice. Release the throttle
trigger if the drilling tool jams.
BT 45
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.
421BA009 KN
Working with a wood drill or twist drill
421BA002 KN
Working with the planting hole auger
421BA008 KN
Working with the ice 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
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".
9
English
Fuel
Your engine requires a mixture of
gasoline and engine oil.
WARNING
For health reasons, avoid direct skin
contact with gasoline and avoid inhaling
gasoline vapor.
If your machine is equipped with a
catalytic converter, you must use
unleaded gasoline.
NOTICE
A few tankfuls of leaded gasoline will
greatly reduce the efficiency of the
catalytic converter.
Examples
Gasoline
Liters
1
5
10
15
20
25
Gasoline with an ethanol content of
more than 10% can cause running
problems in engines with a manually
adjustable carburetor and should not be
used in such engines.
N
STIHL recommends the use of STIHL
MotoMix. This ready-to-use fuel mix
contains no benzol or lead, has a high
octane rating and ensures that you
always use the right mix ratio.
Engines equipped with M-Tronic deliver
full power when run on gasoline with an
ethanol content of up to 25% (E25).
Storing Fuel
STIHL MotoMix uses STIHL HP Ultra
two-stroke engine oil for an extra long
engine life.
Use only high-quality two-stroke engine
oil – preferably STIHL HP, HP Super or
HP Ultra, which are specially formulated
for use in STIHL engines. HP Ultra
guarantees high performance and a
long engine life.
STIHL MotoMix
MotoMix is not available in all markets.
Mixing Fuel
NOTICE
Unsuitable fuels or lubricants or mix
ratios other than those specified may
result in serious damage to the engine.
Poor quality gasoline or engine oil may
damage the engine, sealing rings, hoses
and the fuel tank.
Gasoline
Use only high-quality brand-name
gasoline with a minimum octane rating
of 90 – leaded or unleaded.
10
Engine oil
These engine oils are not available in all
markets.
Use only STIHL 50:1 two-stroke engine
oil for the fuel mix in models with a
catalytic converter.
STIHL engine oil 50:1
Liters
(ml)
0.02
(20)
0.10
(100)
0.20
(200)
0.30
(300)
0.40
(400)
0.50
(500)
Use a canister approved for storing
fuel. Pour oil into canister first, then
add gasoline and mix thoroughly.
Store fuel only in approved safety-type
fuel canisters in a dry, cool and safe
location protected from light and the sun.
Fuel mix ages – only mix sufficient fuel
for a few weeks work. Do not store fuel
mix for longer than 30 days. Exposure to
light, the sun, low or high temperatures
can quickly make the fuel mix unusable.
STIHL MotoMix may be stored for up to
2 years without any problems.
N
Thoroughly shake the mixture in the
canister before fueling your
machine.
Mix Ratio
STIHL 50:1 two-stroke engine oil: 50
parts gasoline to 1 part oil
WARNING
Pressure may build up in the canister –
open it carefully.
N
Clean the fuel tank and canister
from time to time.
BT 45
English
Dispose of remaining fuel and cleaning
fluid properly in accordance with local
regulations and environmental
requirements.
Depending on the version, your machine
may be equipped with a tank cap and
fuel tank with or without symbols.
Fueling
001BA240 KN
Preparations
Left:
Right:
Tank cap without symbols
Tank cap with markings and
symbols on cap and tank
Tank cap without symbols
N
N
Before fueling, clean the filler cap
and the area around it to ensure that
no dirt falls into the tank.
Position the machine so that the
filler cap is facing up.
001BA218 KN
421BA011 KN
Opening
N
Swing the grip to the upright
position.
Tank cap markings
Tank caps and fuel tanks may be
marked in different ways
BT 45
11
English
Fit the cap – positioning marks on
tank cap and filler neck must be in
alignment.
N
Press the cap down as far as stop.
Rotate the tank cap about a quarter
turn counterclockwise.
N
001BA221 KN
N
001BA225 KN
001BA219 KN
N
While holding the cap depressed,
turn it clockwise until it engages in
position.
If the cap can be turned or removed
Bottom of cap is twisted in relation to
top:
001BA224 KN
N
Grip the cap – it is properly locked if
it cannot be turned or removed.
Remove the cap.
001BA222 KN
Filling up with fuel
Take care not to spill fuel while fueling
and do not overfill the tank.
STIHL recommends you use the STIHL
filler nozzle for fuel (special accessory).
N
Fill up with fuel.
N
Fold the grip flush with the top of the
cap.
001BA227 KN
N
Left:
Right:
Bottom of cap twisted
Bottom of cap correctly
positioned
Checking security of cap
Grip must be vertical:
12
001BA223 KN
001BA220 KN
Closing
–
The lug on the grip must fully
engage the recess (arrow).
BT 45
English
N
N
Turn the cap counterclockwise
(about a quarter turn).
Continue rotating the cap
counterclockwise (about a quarter
turn) – this causes the bottom of the
cap to be turned to the correct
position.
Turn and lock the cap clockwise –
see sections on "Closing" and
"Checking security of cap".
Grip must be vertical:
N
Fit the cap – marks on tank cap and
fuel tank must line up.
N
Press the cap down as far as stop.
N
While holding the cap depressed,
turn it clockwise until it engages in
position.
Marks on tank cap and fuel tank must
line up.
Tank cap with markings and symbols
001BA233 KN
N
Place the cap on the opening and
rotate it counterclockwise until it
engages the filler neck.
001BA234 KN
N
001BA234 KN
001BA226 KN
001BA232 KN
Closing
N
Raise the grip until it is upright.
N
Remove the cap.
Filling up with fuel
Take care not to spill fuel while fueling
and do not overfill the tank.
STIHL recommends you use the STIHL
filler nozzle for fuel (special accessory).
N
BT 45
001BA231 KN
001BA236 KN
001BA237 KN
Opening
The marks on the tank cap and fuel tank
are then in alignment.
Fill up with fuel.
13
English
001BA235 KN
1
N
Fold the grip down so that it is flush
with the top of the cap.
Left:
Bottom of cap is twisted –
inner mark (1) in line with
outer mark.
Bottom of cap in correct position – inner mark is under the
grip. It is not in line with the
outer mark.
421BA017 KN
001BA241 KN
Right:
001BA238 KN
Gearbox
001BA239 KN
Tank cap is locked.
If the tank cap cannot be locked in the
fuel tank opening
Bottom of cap is twisted in relation to
top.
N
Remove the cap from the fuel tank
and check it from above.
N
Place the cap on the opening and
rotate it counterclockwise until it
engages the filler neck.
N
Continue rotating the cap
counterclockwise (about a quarter
turn) – this causes the bottom of the
cap to be turned to the correct
position.
N
14
Turn the cap clockwise and lock it in
position – see section on "Closing".
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.
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.
BT 45
English
N
1
2
R
Neutral: Gearbox in neutral for
starting, adjusting the carburetor
and changing the drilling tool.
Low-speed clockwise rotation, see
"Specifications"
High-speed clockwise rotation, see
"Specifications"
Counterclockwise rotation, e.g. for
releasing a trapped drilling tool
N
With the engine stopped (knob in N
position), out the machine on the
ground and make sure it is secure.
5
Chuck for wood drills or twist drills
3
3
4
3
1
N
2
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.
BT 45
5
421BA019 KN
Do not change the position of the rotary
knob while the engine is running above
idle speed – the drilling tool rotates.
Adapter for ice auger or planting hole
auger
Fitting the Auger
421BA018 KN
WARNING
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.
15
English
Starting the Engine
Starting / Stopping the
Engine
4
2
3
5
421BA020 KN
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.
16
N
Depress the choke lever (1) and set
it to
N
Press the manual fuel pump
bulb (5) at least five times.
Cranking
l if the engine is cold
j for warm start – also use this position 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
Place the unit on the ground so that
it is secure.
N
Let go of the throttle trigger and
starting throttle lock. This is the
starting throttle position.
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.
421BA001 KN
N
421BA022 KN
421BA021 KN
1
BT 45
English
Do not let the starter grip snap back.
Guide it slowly back into the housing
so that the starter rope can rewind
properly.
At very low outside temperatures
N
When engine begins to fire
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.
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.
Open throttle slightly – warm up the
engine for a short period.
If engine does not start
421BA023 KN
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.
N
Set choke lever to j and
If the engine still does not start
N
continue cranking.
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.
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.
BT 45
17
English
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".
18
Cleaning the Air Filter
If there is a noticeable loss of engine
power
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.
1
3
4
2
421BA026 KN
During break-in period
Releasing a Trapped Auger
421BA025 KN
Operating Instructions
N
Set the choke lever to l.
N
Loosen the screw (1).
N
Remove the air filter cover (2).
N
Clean away loose dirt from around
the filter.
N
Take the air filter (3) out of the filter
housing (4).
N
Replace with a new filter – or, as a
temporary measure, knock it out or
blow it clear – do not wash.
N
Replace any damaged parts.
N
Install the filter in the filter housing.
BT 45
English
Adjusting Idle Speed
N
Fit the filter cover, engage the two
tabs (arrows) at the bottom first.
N
Insert the screw and tighten it down
firmly.
N
Carry out the standard setting.
General Information
N
Set rotary knob to N (gearbox in
neutral).
The carburetor comes from the factory
with a standard setting.
N
Start and warm up the engine.
N
Move the rotary knob to 1.
This setting provides an optimum fuel-air
mixture under most operating
conditions.
LA
Preparations
L
N
Shut off the engine.
N
Remove the auger.
N
Check the air filter and clean or
replace if necessary.
421BA047 KN
421BA038 KN
Adjusting the Carburetor
N
Standard Setting
Engine stops while idling
N
H
421BA046 KN
L
BT 45
Adjust idle speed with the idle speed
screw (LA) so that the drilling
spindle does not rotate.
N
Turn high speed screw (H)
counterclockwise as far as stop (no
more than 3/4 turn).
N
Turn the low speed screw (L)
carefully clockwise until it is against
its seat, then turn it back 1 full turn
Turn the idle speed screw (LA)
slowly clockwise until the engine
runs smoothly – the drilling spindle
must not rotate.
Drilling spindle rotates when engine is
idling
N
Turn the idle speed screw (LA)
counterclockwise until the drilling
spindle stops rotating and then turn
the screw another 1/2 to 1 turn in
the same direction.
WARNING
If the drilling spindle continues rotating
when the engine is idling, have your
power drill checked and repaired by your
servicing dealer.
19
English
Idle setting is too lean
N
Turn the low speed screw (L) slowly
counterclockwise until the engine
runs and accelerates smoothly.
N
If the engine is down on power,
difficult to start or runs poorly at idle
speed, first check the spark plug.
N
Fit a new spark plug after about 100
operating hours – or sooner if the
electrodes are badly eroded. Install
only suppressed spark plugs of the
type approved by STIHL – see
"Specifications".
It is usually necessary to change the
setting of the idle speed screw (LA) after
every correction to the low speed
screw (L).
A slight correction of the setting may be
necessary if the engine does not run
satisfactorily:
N
Carry out the standard setting.
N
Set rotary knob to N (gearbox in
neutral).
N
Warm up the engine.
N
Turn high speed screw (H) slightly
clockwise (leaner) – no further than
stop.
Removing the Spark Plug
N
Move the stop switch to 0.
A
N
Clean dirty spark plug.
N
Check electrode gap (A) and
readjust if necessary – see
"Specifications".
N
Rectify the problems which have
caused fouling of the spark plug.
Possible causes are:
6
421BA024 KN
Fine Tuning for Operation at High
Altitude
Checking the Spark Plug
Spark Plug
N
Remove the spark plug boot (6).
N
Unscrew the spark plug.
–
Too much oil in fuel mix.
–
Dirty air filter.
–
Unfavorable running conditions.
1
000BA045 KN
NOTICE
After returning from high altitude, reset
the carburetor to the standard setting.
If the setting is too lean there is a risk of
engine damage due to insufficient
lubrication and overheating.
20
000BA039 KN
Erratic idling behavior, poor acceleration
(even though standard setting of low
speed screw is correct)
WARNING
Arcing may occur if the adapter nut (1) is
loose or missing. Working in an easily
combustible or explosive atmosphere
may cause a fire or an explosion. This
can result result in serious injuries or
damage to property.
BT 45
English
N
Use resistor type spark plugs with a
properly tightened adapter nut.
Installing the spark plug
N
Fit the spark plug by hand and
screw it in
N
Tighten spark plug with combination
wrench
N
Press the spark plug boot firmly
onto the spark plug
BT 45
Engine Running Behavior
If engine running behavior is
unsatisfactory even though the air filter
is clean and the carburetor is properly
adjusted, the cause may be the muffler.
Have the muffler checked for
contamination (carbonization) by your
servicing dealer.
STIHL recommends that you have
servicing and repair work carried out
exclusively by an authorized STIHL
servicing dealer.
Storing the Machine
For periods of 3 months or longer
N
Remove the drilling tool.
N
Drain and clean the fuel tank in a
well ventilated area.
N
Dispose of fuel properly in
accordance with local
environmental requirements.
N
Run the engine until the carburetor
is dry – this helps prevent the
carburetor diaphragms sticking
together.
N
Thoroughly clean the machine – pay
special attention to the cylinder fins
and air filter.
N
Store the machine in a dry, high or
locked location, out of the reach of
children and other unauthorized
persons.
21
English
Complete machine
Control handle
Air filter
Manual fuel pump (if fitted)
Pickup body in fuel tank
Visual inspection (condition, leaks)
X
Clean
Check operation
X
X
X
Replace
X
X
Have repaired by servicing dealer2)
X
Check
X
Replace
X
Fuel tank
Clean
X
Carburetor
Check idle adjustment – drilling spindle must not rotate
X
X
Readjust idle
Spark plug
Spark arrestor1) in muffler
X
Readjust electrode gap
X
Replace after 100 operating hours
Have checked by dealer2)
X
All accessible screws and nuts (not adjustRetighten
ing screws)
Anti-vibration elements
22
as required
X
X
Clean
Check
if damaged
if problem
every 12 months
monthly
weekly
after each refueling stop
before starting work
The following intervals apply to normal operating conditions only. If your daily working time is longer or operating conditions are difficult (very dusty work area, etc.),
shorten the specified intervals accordingly.
after finishing work or daily
Maintenance and Care
Check
Have replaced by servicing dealer2)
X
X
X
X
X
BT 45
Safety labels
1)
2)
every 12 months
X
X
if problem
X
Replace
monthly
Replace
Clean
Inspect
weekly
as required
Auger
if damaged
Drilling spindle
after each refueling stop
before starting work
The following intervals apply to normal operating conditions only. If your daily working time is longer or operating conditions are difficult (very dusty work area, etc.),
shorten the specified intervals accordingly.
after finishing work or daily
English
X
X
not in all versions, market-specific
STIHL recommends an authorized STIHL servicing dealer.
BT 45
23
English
Minimize Wear and Avoid
Damage
Observing the instructions in this manual
helps reduce the risk of unnecessary
wear and damage to the power tool.
The power tool must be operated,
maintained and stored with the due care
and attention described in this owner's
manual.
servicing dealer. STIHL dealers are
regularly given the opportunity to attend
training courses and are supplied with
the necessary technical information.
Alterations or modifications to the
product not approved by STIHL.
–
Using tools or accessories which
are neither approved or suitable for
the product or are of a poor quality.
–
Using the product for purposes for
which it was not designed.
–
Using the product for sports or
competitive events.
–
Consequential damage caused by
continuing to use the product with
defective components.
Maintenance Work
All the operations described in the
"Maintenance Chart" must be performed
on a regular basis. If these maintenance
operations cannot be performed by the
owner, they should be performed by a
servicing dealer.
STIHL recommends that you have
servicing and repair work carried out
exclusively by an authorized STIHL
24
Spark plug
–
Damping elements of anti-vibration
system
If these maintenance operations are not
carried out as specified, the user
assumes responsibility for any damage
that may occur. Among other parts, this
includes:
–
Damage to the engine due to
neglect or deficient maintenance
(e.g. air and fuel filters), incorrect
carburetor adjustment or
inadequate cleaning of cooling air
inlets (intake ports, cylinder fins).
–
Corrosion and other consequential
damage resulting from improper
storage.
–
Damage to the machine resulting
from the use of poor quality
replacement parts.
The user is responsible for all damage
caused by non-observance of the safety
precautions, operating and maintenance
instructions in this manual. This includes
in particular:
–
–
Parts Subject to Wear and Tear
Some parts of the power tool are subject
to normal wear and tear even during
regular operation in accordance with
instructions and, depending on the type
and duration of use, have to be replaced
in good time. Among other parts, this
includes:
–
Auger brake
–
Clutch
–
Augers
–
Filters (air, fuel)
–
Rewind starter
BT 45
English
Main Parts
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
7
3
9
1
8
2
12
13
10
4
6
5
11
14
15
16
20
21
22
23
#
18
17
19
21
22
Wood drill2) / twist drill2)
Chuck1)
Assist handle1)
Rotary knob
Tank cap
Air filter cover
Carrying strap2)
Throttle trigger
Starting throttle lock
Control handle
Carburetor adjusting screws
Stop switch
Starter grip
Choke lever
Manual fuel pump
Planting hole auger2) / ice auger2)
Flange1)
Assist handle1)
Muffler with spark arresting screen
(depending on market)
Spark plug boot
Drilling spindle
Adapter for planting hole auger
Adapter for ice auger
Serial number
23
20
BT 45
421BA043 KN
#
1)
Depending on model
2)
Special accessory
25
English
Weight
Specifications
Engine
Dry, without auger
4.8 kg
STIHL single cylinder two-stroke engine
Dimensions
Displacement:
Bore:
Stroke:
Engine power to
ISO 7293:
Idle speed:
Cut-off speed:
27.2 cc
34 mm
30 mm
0.8 kW (1.1 bhp)
at 7,000 rpm
2,800 rpm
9,500 rpm
Ignition System
Electronic magneto ignition
Spark plug (resistor
type):
Electrode gap:
Bosch WSR 6 F,
NGK BPMR 7 A
0.5 mm
Fuel System
without attachment and chuck
Length:
235 mm
Width:
235 mm
Height:
440 mm
Noise and Vibration Data
Noise and vibration data are measured
at idling and maximum rated speed in a
ratio of 1:4.
For further details on compliance with
Vibration Directive 2002/44/EC see
www.stihl.com/vib/
90 mm plantng hole auger, gearbox
setting 1
Left handle:
12.0 m/s2
Right handle:
7.0 m/s2
The K-factor in accordance with
Directive 2006/42/EC is 2.5 dB(A) for
the sound pressure level and sound
power level; the K-factor in accordance
with Directive 2006/42/EC is 2.0 m/s2
for the vibration measurement.
REACH
REACH is an EC regulation and stands
for the Registration, Evaluation,
Authorisation and Restriction of
Chemical substances.
For information on compliance with the
REACH regulation (EC) No. 1907/2006
see www.stihl.com/reach.
Sound pressure level Lpeq to
EN ISO 11201
98 dB(A)
All position diaphragm carburetor with
integral fuel pump
Sound power level Lweq to ISO 3744
Fuel tank capacity:
103 dB(A)
250 cc (0.25 l)
Vibration measurement ahv,eq to
ISO 8662
Gearbox
Three-stage spur gear drive
Gearbox setting
1
2
R
26
Max. spindle
speed
910 rpm
2,710 rpm
810 rpm
13 mm wood drill, gearbox setting 1
Left handle:
7.2 m/s2
Right handle:
6.1 m/s2
13 mm wood drill, gearbox setting 2
Left handle:
7.2 m/s2
Right handle:
7.5 m/s2
BT 45
English
Users of this machine may only carry out
the maintenance and service work
described in this user manual. All other
repairs must be carried out by a
servicing dealer.
STIHL recommends that you have
servicing and repair work carried out
exclusively by an authorized STIHL
servicing dealer. STIHL dealers are
regularly given the opportunity to attend
training courses and are supplied with
the necessary technical information.
When repairing the machine, only use
replacement parts which have been
approved by STIHL for this power tool or
are technically identical. Only use highquality replacement parts in order to
avoid the risk of accidents and damage
to the machine.
Disposal
EC Declaration of Conformity
Observe all country-specific waste
disposal rules and regulations.
ANDREAS STIHL AG & Co. KG
Badstr. 115
D-71336 Waiblingen
Germany
declare in exclusive responsibility that
the product
000BA073 KN
Maintenance and Repairs
STIHL products must not be thrown in
the garbage can. Take the product,
accessories and packaging to an
approved disposal site for environmentfriendly recycling.
Contact your STIHL servicing dealer for
the latest information on waste disposal.
Category:
Make:
Model:
Serial identification:
Displacement:
Power drill
STIHL
BT 45
4314
27.2 cc
conforms to the relevant requirements of
the Directives 2006/42/EC and
2014/30/EU and has been developed
and manufactured in compliance with
the following standards in the versions
valid at the time of production:
STIHL recommends the use of original
STIHL replacement parts.
EN ISO 12100+A1, EN 55012,
EN 61000-6-1
Original STIHL parts can be identified by
the STIHL part number, the {
logo and the STIHL parts symbol K
(the symbol may appear alone on small
parts).
Technical documents deposited at:
BT 45
ANDREAS STIHL AG & Co. KG
Produktzulassung (Product Licensing)
The year of manufacture and serial
number are applied to the product.
27
English
Done at Waiblingen, 28.10.2016
ANDREAS STIHL AG & Co. KG
Thomas Elsner
Director Product Management and
Services
28
BT 45
0458-421-0121-A
englisch
G
www.stihl.com
*04584210121A*
0458-421-0121-A
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