STIHL BT 45 Manuel utilisateur

STIHL BT 45

Instruction Manual

Notice d’emploi

G Instruction Manual

1 - 27

F Notice d’emploi

28 - 59

Original Instruction ManualPrinted on chlorine-free paper

Printing inks contain vegetable oils, paper can be recycled.

0458-421-8221-A. VA3.E20.

0000000421_013_GB

BT 45

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with electronic systems.

Contents

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

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

Fitting the Auger 15

Starting / Stopping the Engine 15

Operating Instructions 17

Releasing a Trapped Auger 18

Cleaning the Air Filter 18

Engine Management 19

Adjusting the Carburetor 19

Spark Plug 20

Engine Running Behavior 21

Storing the Machine 21

Maintenance and Care 22

Main Parts 23

Specifications 24

Maintenance and Repairs 25

Disposal 25

STIHL Limited Emission Control

Warranty Statement 26

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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.

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.

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.

Guide to Using this Manual

Fuel tank; fuel mixture of

gasoline and engine oil

Operate manual fuel

pump

Safety Precautions and

Working Techniques

Special safety precau-

tions must be taken when

working with this machine

due to the high torque

and partly very high rota-

tional 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 refer-

ence. Non-compliance

with the User Manual

may cause serious or

even fatal injury.

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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.

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.

Wear sturdy shoes with non-slip soles.

WARNING

Wear hearing protection, e.g. ear

defenders.

STIHL can supply a comprehensive

range of personal protective equipment.

Transporting the machine

Always stop the engine.

Clothing must be sturdy

but allow complete free-

dom of movement. Wear

close-fitting clothes such

as a boiler suit, not a

loose jacket.

Tie up and confine long

hair above your

shoulders.

To reduce the risk of eye

injuries, wear close-fit-

ting safety glasses in

accordance with Euro-

pean Standard EN 166.

Make sure the safety

glasses are a snug fit.

Wear sturdy protective

gloves made of a resist-

ant material (e. g.

leather).

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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

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.

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!

Gasoline is highly flam-

mable – keep away from

fire or flame – do not spill

any fuel – no smoking.

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!

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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.

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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!

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.

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 hydro-

carbons and benzene.

Never run the engine

indoors or in poorly venti-

lated locations, even if

your model is equipped

with a catalytic converter.

Avoid contact with lines

carrying electrical cur-

rent – Risk of electrical

shock!

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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.

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, STIHL may deny coverage.

For any maintenance please refer to the

maintenance chart and to the warranty

statement near the end of the instruction

manual.

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.

Mounting the Handles

421BA003 KN

1

2

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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.

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.

421BA036 KN

421BA005 KN

421BA037 KN

3

4

3

5

421BA007 KN

Using the Unit

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Working with the ice auger

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.

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.

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".

421BA008 KN

421BA002 KN

421BA009 KN

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This engine is certified to operate on

unleaded gasoline and with the mix ratio

50:1.

Your engine requires a mixture of high-

quality premium gasoline and high-

quality two-stroke air-cooled engine oil.

Use premium branded unleaded

gasoline with a minimum octane rating

of 89 (R+M)/2.

Note: Models equipped with a catalytic

converter require unleaded gasoline. A

few tankfuls of leaded gasoline can

reduce the efficiency of the catalytic

converter by more than 50%.

Fuel with a lower octane rating may

result in preignition (causing "pinging")

which is accompanied by an increase in

engine temperature. This, in turn,

increases the risk of the 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 as

well. This could cause running problems

or even damage the engine. For this

reason it is essential that you use only

high-quality fuels!

Fuels with different percentages of

ethanol are being offered. Ethanol can

affect the running behaviour of the

engine and increase the risk of lean

seizure.

Gasoline with an ethanol content of

more than 10% can cause running

problems and major damage in engines

with a manually adjustable carburetor

and should not be used in such engines.

Engines equipped with M-Tronic can be

run on gasoline with an ethanol content

of up to 25% (E25).

Use only STIHL two-stroke engine oil or

equivalent high-quality two-stroke air-

cooled engine oils for mixing.

We recommend STIHL 50:1 two-stroke

engine oil since it is specially formulated

for use in STIHL engines.

To ensure the maximum performance of

your STIHL engine, use a high quality 2-

cycle engine oil. To help your engine run

cleaner and reduce harmful carbon

deposits, STIHL recommends using

STIHL HP Ultra 2-cycle engine oil or ask

your dealer for an equivalent fully

synthetic 2-cycle engine oil.

To meet the requirements of EPA and

CARB we recommend to use STIHL HP

Ultra oil.

Do not use BIA or TCW (two-stroke

water cooled) mix oils!

Use only STIHL 50:1 heavy-duty engine

oil or an equivalent quality two-stroke

engine oil for the fuel mix in models

equipped with a catalytic converter.

Take care when handling gasoline.

Avoid direct contact with the skin and

avoid inhaling fuel vapour.

The canister should be kept tightly

closed in order to avoid any moisture

getting into the mixture.

The fuel tank and the canister in which

fuel mix is stored should be cleaned

from time to time.

Fuel mix ratio

Only mix sufficient fuel for a few days

work, not to exceed 30 days of storage.

Store in approved safety fuel-canisters

only. When mixing, pour oil into the

canister first, and then add gasoline.

Dispose of empty mixing-oil canisters

only at authorized disposal locations.

Fuel

Examples

Gasoline Oil (STIHL 50:1 or equiva-

lent high-quality oils)

liters liters (ml)

1 0.02 (20)

5 0.10 (100)

10 0.20 (200)

15 0.30 (300)

20 0.40 (400)

25 0.50 (500)

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Preparations

N Before fueling, clean the filler cap

and the area around it to ensure that

no dirt falls into the tank.

N Position the machine so that the

filler cap is facing up.

Different markings on filler caps

Filler caps and fuel tanks can be marked

differently.

Depending on the version, filler cap and

fuel tank may be available with or

without markings.

Filler cap without marking

To open:

N Open bracket until it is vertical

N Turn the filler cap counterclockwise

(approx. 1/4 turn)

N Remove the filler cap

Filling with fuel

Take care not to spill fuel while fueling

and do not overfill the tank.

STIHL recommends using the STIHL

filling system for fuel (special

accessory).

N Fill with fuel

Closing

Bracket is in an upright position:

N Position filler cap – position

markings on the filler cap and the

filler port must be aligned with each

other.

N Push the filler cap down as far as it

will go

Fueling

421BA011 KN

left: Filler cap - without markings

right: Filler cap - with markings on

cap and fuel tank

001BA240 KN

001BA218 KN

001BA219 KN

001BA224 KN

001BA220 KN

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N Hold the filler cap down and turn it

clockwise until it engages

N Fold down the bracket as far as it

will go

Checking the lock

– The lug on the bracket must engage

entirely in the recess (arrow)

N Grip the filler cap – if the filler cap

cannot be moved or removed, then

it is closed properly

If the filler cap can be moved or removed

The base of the filler cap is twisted in

relation to the upper part.

N Fit filler cap and turn it

counterclockwise until it engages in

the seat of the filling port

N Continue to turn the filler cap

counterclockwise (approx. 1/4 turn)

– this will twist the base of the cap

into the correct position

N Turn the filler cap clockwise and

close it – see the section "Closing"

and "Checking the lock"

Filler cap with marking

To open:

N Open bracket

001BA221 KN

001BA222 KN

001BA223 KN

left: Base of filler cap twisted

right: Base of filler cap correctly

positioned

001BA225 KN

001BA227 KN

001BA226 KN

001BA236 KN

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N Turn filler cap (approx. 1/4 turn)

Markings on filler cap and fuel tank must

align

N Remove the filler cap

Filling with fuel

Take care not to spill fuel while fueling

and do not overfill the tank.

STIHL recommends using the STIHL

filling system for fuel (special

accessory).

N Fill with fuel

Closing

Bracket is in an upright position:

N Position filler cap – markings on filler

cap and fuel tank must align

N Push the filler cap down as far as it

will go

N Hold the filler cap down and turn it

clockwise until it engages

Then the markings on filler cap and fuel

tank will align

N Close bracket lock

Filler cap is locked

If the filler cap will not lock onto the fuel

tank

The base of the filler cap is twisted in

relation to the upper part.

N Remove the filler cap from the fuel

tank and look at it from above

001BA232 KN

001BA234 KN

001BA237 KN

001BA234 KN

001BA233 KN

001BA231 KN

001BA235 KN

001BA241 KN

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14

N Fit filler cap and turn it

counterclockwise until it engages in

the seat of the filling port

N Continue to turn the filler cap

counterclockwise (approx. 1/4 turn)

– this will twist the base of the cap

into the correct position

N Turn the filler cap clockwise and

close it – see section "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.

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

left: Base of filler cap is twisted –

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 bracket.

It does not align with the

exterior marking

1

001BA238 KN

001BA239 KN

Gearbox

421BA017 KN

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N With the engine stopped (knob in N

position), out 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.

Adapter for ice auger or 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.

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.

Fitting the Auger

421BA018 KN

1

2

5

421BA019 KN

5

4

3

Starting / Stopping the

Engine

421BA020 KN

BT 45

English

16

Starting the Engine

N Depress the choke lever (1) and set

it to

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.

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.

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.

4

1

421BA021 KN

2

3

421BA022 KN

5

421BA001 KN

421BA023 KN

BT 45

English

17

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.

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.

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 engine-

mounted 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-of-

service periods – see "Storing the

Machine".

Operating Instructions

BT 45

English

18

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.

If there is a noticeable loss of engine

power

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.

N Fit the filter cover, engage the two

tabs (arrows) at the bottom first.

N Insert the screw and tighten it down

firmly.

Releasing a Trapped Auger

421BA025 KN

Cleaning the Air Filter

421BA026 KN

1

2

3

4

421BA038 KN

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STIHL BT 45 Manuel utilisateur

STIHL BT 45 Manuel utilisateur

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