Stihl BG 50 Manuale utente
Contents
1 Guide to Using this Manual.........................2
2 Safety Precautions and Working Techni‐
ques............................................................ 2
3 Assembling the Blower............................... 6
4 Fuel............................................................. 6
5 Fueling........................................................ 7
6 Starting / Stopping the Engine.................... 8
7 Cleaning the Air Filter................................. 9
8 Adjusting the Carburetor........................... 10
9 Spark Plug................................................ 11
10 Engine Running Behavior......................... 12
11 Storing the Machine.................................. 12
12 Maintenance and Care..............................13
13 Main Parts.................................................14
14 Specifications............................................14
15 Maintenance and Repairs......................... 15
16 Disposal.................................................... 15
17 EC Declaration of Conformity................... 15
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
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 operating a power
tool.
It is important you read and under‐
stand the User Manual before com‐
missioning 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 not used this machine before: Have
your dealer or other experienced user show you
how to handle your machine safely or attend a
specialist course.
Minors must never work with the machine –
except for young people over the age of 16 who
are being trained under supervision.
Children, animals and bystanders must remain at
a distance.
When the machine is not in use, put it in a place
where it does not endanger others. Secure the
machine against unauthorized access.
The user is responsible for accidents or risks
involving third parties or their property.
Do not pass on or lend the machine to persons
who are not familiar with this model and its han‐
dling – always include the User Manual.
In some countries the operation of noise emitting
power tools is restricted by local regulations.
Observe country-specific requirements and regu‐
lations.
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 Accessories and spare parts
Only use parts and accessories that are explicitly
approved for this power tool by STIHL or are
technically identical. 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 unit.
English
2 0458-425-0121-D
© ANDREAS STIHL AG & Co. KG 2022
0458-425-0121-D. VA0.G22.
Printed on chlorine-free paper
Printing inks contain vegetable oils, paper can be recycled.
Original Instruction Manual
0000007077_011_GB
STIHL recommends the use of original STIHL
parts 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.
2.2 Physical fitness
To operate the power tool you must be rested, in
good physical condition and mental health. If you
have any condition which may be aggravated by
strenuous work, check with your doctor before
operating a power tool.
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. To reduce health risks,
STIHL recommends that persons with pacemak‐
ers consult their physician and the pacemaker
manufacturer before operating this tool.
Do not operate the power tool if you have con‐
sumed alcohol or taken medication, which may
impair responsiveness, or taken drugs.
2.3 Intended Use
The blower is designed for blow-sweeping
leaves, grass, paper and similar materials, e.g. in
gardens, sports stadiums, car parks and drive‐
ways. It is also suitable for blow-sweeping forest
paths.
The machine must not be used for any other pur‐
poses – risk of accidents!
Do not operate or store your machine at temper‐
atures below ‑10 °C – extreme cold may damage
machine components.
2.4 Personal Protective Equip‐
ment / Personal Protective
Clothing
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.
Avoid wearing any clothing, scarves, neckties or
jewelry which could get into the air intake. 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 "personal" sound protection, e.g. ear
defenders.
2.5 Transporting the machine
Always stop the engine.
Transporting in a vehicle:
–Secure the machine against overturning, dam‐
age and fuel spillage
2.6 Refueling
Gasoline is extremely flammable –
keep it away from naked flames – 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 you spill fuel, wipe the machine immedi‐
ately – if fuel gets on your clothing, change
immediately.
Check for fuel leakage! Never start
the engine if fuel has been spilled or
is leaking – Fatal burns may result!
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.
2.7 Before starting
Check that your power tool is properly assem‐
bled and in good condition – refer to appropriate
chapters in the User 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!
2 Safety Precautions and Working Techniques English
0458-425-0121-D 3
Have the machine serviced by a dealer before
using it
–Throttle trigger must move freely and spring
back by itself to the idle position
–Stop switch must move easily to 0
–Check that the spark plug boot is secure – a
loose boot may cause sparking that could
ignite combustible fumes and cause a fire!
–Check condition of blower wheel and blower
housing – see chapter on "Using the Blower"
–A worn fan housing (cracks, nicks, chips) may
result in an increased risk of injury from thrown
foreign objects
–If either the blower wheel or blower housing is
damaged, consult your dealer – STIHL recom‐
mends you contact a STIHL servicing dealer
–Never attempt to modify the controls or safety
devices
To reduce the risk of accidents and personal
injury, do not operate your power tool if it is not
properly assembled and in good condition
2.8 Starting the engine
Start the engine at least 3 meters from the fuel‐
ing spot, outdoors only.
Your power tool is designed to be operated by
one person only. Do not allow other persons in
the work area – even when starting.
Do not drop-start the power tool – start the
engine as described in the user manual.
Place the machine on level ground only, ensure
that you have a secure footing and hold the
machine securely.
As soon as the engine starts, the increasing air
flow may eject objects (e.g. stones).
2.9 While working
Do not direct the air blast towards
bystanders or animals – the machine
may eject small objects at high speed
– risk of injury!.
In the event of impending danger or in an emer‐
gency, switch off the engine immediately – move
the stop switch to 0 .
To reduce the risk of injury from
thrown objects, do not allow any other
persons within 5 meters of your own
position.
Never leave a running machine unattended.
Take special care in slippery and wet conditions,
in snow, on ice, on slopes or uneven ground –
Risk of slipping!
Watch out for obstacles such as tree stumps,
roots and ditches which could cause you to trip
or stumble.
Do not work on a ladder or in unstable locations.
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.
When blow-sweeping (in open terrain and in gar‐
dens), look out for small animals to prevent
endangering them.
After work, place the machine on a level, non-
flammable surface. Do not place the machine
near easily flammable materials (e.g. wood
chips, bark, dry grass, fuel) – risk of fire!
Your power tool produces toxic
exhaust fumes as soon as the engine
is running. These gases may be odor‐
less and invisible and may contain
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.
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!
The dust, which is swirled up during operation,
may be harmful to health. Wear a dust mask in
case of dust formation.
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.
If the machine was exposed to a load 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.
English 2 Safety Precautions and Working Techniques
4 0458-425-0121-D
Do not continue operating the machine if it is
damaged. In case of doubt, contact a dealer.
2.10 Using the blower
0075BA001 KN
The blower is designed for one-handed opera‐
tion. The operator must carry the blower with his
right hand on the control handle.
Always hold the power tool firmly in your hand.
When blow-sweeping in open terrain and in gar‐
dens, look out for small animals.
Work only slowly, moving in a forwards direction
– always observe the discharge area of the
blower tube – do not move backwards – risk of
tripping!
WARNING
Operate the machine only with the blower tube
completely mounted – risk of injury!
2.11 Working Technique
To minimize blowing time, use a rake and broom
to loosen dirt particles before you start blowing.
–If necessary, dampen the surface to be
cleaned in order to avoid creating too much
dust.
–Do not blow particles in the direction of
bystanders, in particular in the direction of chil‐
dren, pets, open windows or freshly washed
vehicles. Take special care in such situations.
–Remove the blow-swept debris in rubbish bins
– do not blow it onto the neighbor's land.
–Operate your power tool at reasonable times
only – not early in the morning, late at night or
during midday rest periods when people could
be disturbed. Observe local rest periods.
–Operate blowers at the lowest engine speed
necessary to accomplish the task.
–Check your blower before starting work. Pay
special attention to the muffler, air intakes and
air filter.
2.12 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 cir‐
culation (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.
2.13 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 per‐
formed by a servicing dealer.
STIHL recommends that you have servicing and
repair work carried out exclusively by an author‐
ized 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 original 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.
2 Safety Precautions and Working Techniques English
0458-425-0121-D 5
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 inter‐
vals.
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 con‐
dition, 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.
3 Assembling the Blower
3.1 Mounting the Blower Tube
3
2
295BA003 KN
1
► Push the blower tube (1) with lug (2) into the
fan housing stub (3) and rotate it in the direc‐
tion of the arrow to lock in position.
3.2 Removing the Blower Tube
6
295BA005 KN
3
► Use a suitable tool to lift the tab (6) on the fan
housing stub (3).
► Rotate the blower tube in the direction of the
arrow and then pull it out.
4 Fuel
The engine requires a mixture of gasoline and
engine oil.
WARNING
Avoid direct skin contact with fuel and breathing
in of gasoline fumes.
4.1 STIHL MotoMix
STIHL recommends using STIHL MotoMix. This
pre-blended fuel is free of benzene and lead, is
distinguished by a high octane rating, and
always provides the proper mixing ratio.
STIHL MotoMix uses STIHL HP Ultra two-stroke
engine oil for optimum engine life.
MotoMix is not available in all markets.
English 3 Assembling the Blower
6 0458-425-0121-D
4.2 Mixing fuel
NOTICE
Unsuitable fuels or a mixing ratio that deviates
from the specification can lead to severe engine
damage. The engine, seals, fuel lines and fuel
tank may be damaged if low-quality gasoline or
engine oil is used.
4.2.1 Gasoline
Use only high-quality gasoline with an octane rat‐
ing of at least 90 ROC – leaded or unleaded.
Gasoline with an alcohol component exceeding
10% can cause impaired engine performance in
engines with manually adjustable carburetors
and thus should not be used in these engines.
Engines with M-Tronic deliver full engine per‐
formance using gasoline with an alcohol compo‐
nent of up to 27% (E27).
4.2.2 Engine oil
If you mix the fuel yourself, use only STIHL two-
stroke engine oil or another high-performance
engine oil classified as JASO FB, JASO FC,
JASO FD, ISO-L-EGB, ISO-L-EGC or ISO-L-
EGD.
STIHL specifies STIHL HP Ultra two-stroke
engine oil or an equivalent high-performance
engine oil in order to maintain emission limits
over the machine’s service life.
4.2.3 Mixing ratio
with STIHL two-stroke engine oil 1:50; 1:50 =
1 part oil + 50 parts gasoline
4.2.4 Examples
Quantity of gaso‐
line
STIHL two-stroke
engine oil 1:50
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)
► Pour oil into an approved safety fuel canister
first, then add gasoline and mix thoroughly
4.3 Storing fuel mixture
Store in approved safety fuel canisters only in a
dry, cool and secure place protected against light
and sunlight.
Fuel mixture deteriorates with age – mix only as
much as needed for a few weeks. Do not store
fuel mixture for longer than 30 days. The fuel
mixture can become unusable more quickly if
exposed to light, sunlight or low or high tempera‐
tures.
STIHL MotoMix however can be stored for up to
5 years without any problems.
► Shake the canister containing the fuel mixture
thoroughly before refueling
WARNING
Pressure may have built up in the canister –
open it carefully.
► The fuel tank and the canister in which fuel
mixture is stored should be cleaned thoroughly
from time to time
Residual fuel and the liquid used for cleaning
must be disposed of in accordance with regula‐
tions and without harming the environment!
5 Fueling
5.1 Preparations
295BA033 KN
► Before fueling, clean the filler cap and the area
around it to ensure that no dirt falls into the
tank.
5 Fueling English
0458-425-0121-D 7
► Position the machine so that the tank cap
faces up.
STIHL recommends you use the STIHL filler noz‐
zle for fuel (special accessory).
5.2 Filling Up with Fuel
Take care not to spill fuel while fueling and do
not overfill the tank.
► Open the cap.
► Fill up with fuel.
► Close the cap.
WARNING
After fueling, tighten down the filler cap as
securely as possible by hand.
6 Starting / Stopping the
Engine
6.1 Starting the Engine
► Observe safety precautions.
0075BA003 KN
► Press the fuel pump bulb at least five times –
even if the bulb is already filled with fuel.
2
1
0075BA002 KN
► Move the stop switch (1) to the run position I
Setting the choke lever
If the engine is cold
3
0000-GXX-2832 A0
►Move the choke lever (3) to g
► Pull the throttle trigger (2) and hold it there.
► Crank engine until it begins to fire.
►Move the choke lever (3) to e
► Pull the throttle trigger (2) and hold it there.
► Continue cranking until the engine runs.
If the engine is warm
Also use this setting if the engine has been run‐
ning but is still cold.
►Move the choke lever (3) to e
► Pull the throttle trigger (2) and hold it there.
► Continue cranking until the engine runs.
Cranking
295BA016 KN
► Place the unit on the ground so that it is
secure.
English 6 Starting / Stopping the Engine
8 0458-425-0121-D
► Make sure you have a firm footing: Hold the
unit firmly with your left hand on the housing
and press down.
► Hold the starter grip with your right hand.
► Pull the starter grip slowly until you feel it
engage and then give it a brisk strong pull.
NOTICE
Do not pull out the starter rope all the way – 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.
6.2 Stopping the Engine
► Move the stop switch to 0
6.3 Other Hints on Starting
6.3.1 If the engine stops during warm-up or
acceleration
► Repeat the starting procedure – see "If the
engine is cold".
6.3.2 If engine does not start
► Make sure all settings are correct (choke shut‐
ter, stop switch in run position I).
► Repeat the starting procedure.
6.3.3 If the engine still does not start
► Move the stop switch to 0
► Remove the spark plug – see "Spark Plug".
► Dry the spark plug.
► Crank the engine several times with the starter
to clear the combustion chamber.
► Refit the spark plug – see "Spark Plug".
► Move the stop switch to I
►set the choke lever to e – even if the engine
is cold.
► Pull the throttle trigger (2) and hold it there.
► Now start the engine.
6.3.4 If fuel tank has been run completely
dry and then refueled
0075BA003 KN
► Press the fuel pump bulb at least five times –
even if the bulb is already filled with fuel.
► Set the choke lever according to engine tem‐
perature.
► Now start the engine.
7 Cleaning the Air Filter
7.1 If there is a noticeable loss of
engine power
0075BA005 KN
1
2
►Move the choke lever to g
► Squeeze the tabs (1) together.
► Swing the filter cover (2) open and take it
away.
► Clean away loose dirt from around the filter.
7 Cleaning the Air Filter English
0458-425-0121-D 9
4
0075BA006 KN
3
2
► Take the filter (3) out of the filter housing (4).
► Install a new filter. Temporary measure: wash
the filter.
Replace any damaged parts.
► Fit the filter (3) in the filter housing (4).
► Fit the filter cover (2) so that it snaps into posi‐
tion.
8 Adjusting the Carburetor
8.1 General Information
The carburetor comes from the factory with a
standard setting.
This setting provides an optimum fuel-air mixture
under most operating conditions.
8.2 Preparations
► Shut off the engine.
► Check the air filter and clean or replace if nec‐
essary.
► Check the spark arresting screen (not in all
models, country-specific) in the muffler and
clean or replace if necessary.
8.3 Standard Setting
295BA085 KN
► Turn high speed screw (H) counterclockwise
as far as stop (no more than 3/4 turn).
► Turn the low speed screw (L) clockwise as far
as stop, then turn it back 3/4 turn.
8.4 Adjusting Idle Speed
► Carry out the standard setting.
► Start and warm up the engine.
English 8 Adjusting the Carburetor
10 0458-425-0121-D
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4
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