Stihl BT 131 User manual

BT 131
2 - 20 Instruction Manual

Contents
1 Guide to Using this Manual.........................2
2 Safety Precautions and Working Techni‐
ques............................................................ 2
3 Assembling the Unit.................................... 7
4 Adjusting the Throttle Cable........................7
5 Fuel............................................................. 7
6 Fueling........................................................ 8
7 Auger Brake................................................ 9
8 Fitting the Auger........................................10
9 Starting / Stopping the Engine.................. 11
10 Operating Instructions...............................13
11 Releasing a Trapped Auger...................... 13
12 Replacing the Air Filter..............................14
13 Adjusting the Carburetor........................... 14
14 Spark Plug................................................ 14
15 Engine Running Behavior......................... 15
16 Lubricating the Gearbox............................15
17 Storing the Machine.................................. 16
18 Maintenance and Care..............................16
19 Main Parts.................................................18
20 Specifications............................................18
21 Maintenance and Repairs......................... 19
22 Disposal.................................................... 19
23 EC Declaration of Conformity................... 20
1 Guide to Using this Manual
1.1 Pictograms
The meanings of the pictograms attached to the
machine are explained in this manual.
Depending on the model concerned, the follow‐
ing pictograms may be attached to your
machine.
Fuel tank; fuel mixture of gasoline
and engine oil
Operate manual fuel pump
Auger brake
1.2 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.
1.3 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 man‐
ual.
2 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 bit in
certain applications, and because the
auger bits have sharp edges.
It is important you read and under‐
stand the instructions for use before
first use and keep it in a safe place
for future reference. Non-compliance
with the User Manual may cause seri‐
ous 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.
English
2 0458-529-8321-B
© ANDREAS STIHL AG & Co. KG 2022
0458-529-8321-B. VA0.D22.
Printed on chlorine-free paper Printing inks contain vegetable oils, paper can be recycled.
Original Instruction Manual 0000007625_006_GB

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 under‐
stands the information contained in this manual.
The use of machines that emit noise may be limi‐
ted to certain hours of the day as specified by
national and/or regional or local regulations.
Anyone operating the machine must be well res‐
ted, in good physical health and in good mental
condition.
If you have any condition that might be aggrava‐
ted 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 per‐
sons 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.
Use your power tool only for drilling holes in soil,
ice and wood – depending on the drilling tool
mounted. Select the drill axis so that the lever of
the drill brake can be supported on the thigh of
the operator at any time during drilling.
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 compa‐
nies
–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.
2.1 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 trap‐
ped 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 a safety hard hat where there is a danger
of head injuries from falling objects.
Wear sturdy protective gloves made
of a resistant material (e. g. leather).
STIHL can supply a comprehensive range of per‐
sonal protective equipment.
2.2 Transporting the machine
Always stop the engine.
Remove the auger before transporting the power
tool long distances. To reduce the risk of burn
injury, carry the unit by the handle frame with hot
parts of the machine (e.g. gearbox) away from
your body.
By vehicle: When transporting in a vehicle, prop‐
erly secure your machine to prevent turnover,
damage and fuel spillage.
2 Safety Precautions and Working Techniques English
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2.3 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.
After fueling, tighten down the screw-
type fuel cap as securely as possible.
This helps reduce the risk of unit vibrations caus‐
ing an incorrectly tightened fuel cap to loosen or
come off and spill quantities of fuel.
Check for fuel leakage! Never start
the engine if fuel has been spilled or
is leaking – Fatal burns may result!
2.4 Before starting
Check that your power tool is properly assem‐
bled and in good condition – refer to appropriate
chapters in the instructions for use.
–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
–The stop switch must be easy to push
–Functional drill brake
–Check the choke lever, throttle trigger and
throttle trigger lockout for smooth action -
throttle trigger must return automatically to idle
position. The choke lever must spring back
from the g and < positions to the run posi‐
tion F when the throttle trigger lockout and
throttle trigger are squeezed
–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!
2.5 Starting the engine
Start the engine at least 3 meters from the fuel‐
ing spot, outdoors only.
Place the power tool on level ground, make sure
you have secure footing.
Engage the drill brake before starting. Otherwise,
the drilling tool may begin to run, causing the
user to lose control of the earth auger.
The machine is operated by a single person only
– do not allow any person to stay within the work‐
ing 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 descri‐
bed in the instructions for use.
Check idle speed setting: The drilling tool must
not rotate when the engine is idling with the throt‐
tle 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!
English 2 Safety Precautions and Working Techniques
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2.6 Holding and guiding the
machine
9912BA000 KN
Always hold the unit firmly with both hands on
the handles.
Ensure you always have a firm and safe footing –
drill brake on left thigh.
Firmly grasp the handles with the thumbs, left
hand on control handle.
2.7 While working
Make sure you always have good balance and
secure footing.
In the event of impending danger or in an emer‐
gency, switch off the engine immediately by
pressing the stop switch.
Do not allow any other persons in the work area.
Keep well away from other people – risk of acci‐
dents!
Check for correct idling, so that the auger stops
turning when the throttle trigger is released.
Check and correct the idle speed setting at regu‐
lar intervals. If the drilling tool continues to rotate
when the engine is idling, have the machine
checked by your servicing dealer. STIHL recom‐
mends STIHL dealers.
Take special care in slippery conditions – damp‐
ness, snow, ice, on slopes or uneven ground.
Watch out for obstacles: tree stumps, roots – risk
of tripping or stumbling!
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 feel‐
ing 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.
As soon as the engine is running, the
power machine generates toxic
exhaust gas. These gases may be
odorless and invisible and may con‐
tain unburned hydrocarbons and ben‐
zene. Never run the engine indoors or
in poorly ventilated locations, even if
your model is equipped with a cata‐
lytic converter.
To reduce the risk of serious or fatal injury from
breathing toxic fumes, ensure proper ventilation
when working in trenches, hollows or other con‐
fined 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.
To reduce the risk of fire, do not smoke while
operating or standing near your power tool. Com‐
bustible fuel vapor may escape from the fuel sys‐
tem.
Dust, fumes and smoke produced while working
may be hazardous to your health. Wear respira‐
tory protection in case of heavy dust or smoke
emission.
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.
2 Safety Precautions and Working Techniques English
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