Stihl BG 50 User manual

STIHL BG 50 Instruction Manual

Original Instruction ManualPrinted on chlorine-free paper
Printing inks contain vegetable oils, paper can be recycled.
© ANDREAS STIHL AG & Co. KG, 2020 0458-425-0121-C. VA2.F20. 0000007077_010_GB
BG 50
English
1
This instruction manual is protected by copyright. All rights reserved, especially the rights to reproduce, translate and process
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
Assembling the Blower 7
Fuel 8
Fueling 9
Starting / Stopping the Engine 9
Cleaning the Air Filter 11
Adjusting the Carburetor 12
Spark Plug 13
Engine Running Behavior 14
Storing the Machine 14
Maintenance and Care 15
Main Parts 16
Specifications 17
Maintenance and Repairs 18
Disposal 18
EC Declaration of Conformity 18

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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 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.
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 observed
when operating a power
tool.
It is important you read
and understand the User
Manual before commis-
sioning and keep it in a
safe place for future ref-
erence. Non-compliance
with the User Manual
may cause serious or
even fatal injury.

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Do not pass on or lend the machine to
persons who are not familiar with this
model and its handling – 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 regulations.
Do not use a high-pressure washer to
clean the power tool. The solid jet of
water may damage parts of the unit.
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.
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.
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 pacemakers consult their physician
and the pacemaker manufacturer before
operating this tool.
Do not operate the power tool if you
have consumed alcohol or taken
medication, which may impair
responsiveness, or taken drugs.
Intended Use
The blower is designed for blow-
sweeping leaves, grass, paper and
similar materials, e.g. in gardens, sports
stadiums, car parks and driveways. It is
also suitable for blow-sweeping forest
paths.
The machine must not be used for any
other purposes – risk of accidents!
Do not operate or store your machine at
temperatures below -10 °C – extreme
cold may damage machine
components.
Personal Protective Equipment /
Personal Protective Clothing
Wear proper protective clothing and
equipment.
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
Wear "personal" sound protection, e.g.
ear defenders.
Transporting the machine
Always stop the engine.
Transporting in a vehicle:
–Secure the machine against
overturning, damage and fuel
spillage
Refueling
Clothing must be sturdy
but allow complete free-
dom of movement. Wear
close-fitting clothes such
as a boiler suit, not a
loose jacket.
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.
Gasoline is extremely
flammable – keep it
away from naked flames
– do not spill any fuel – no
smoking.

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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 immediately – if fuel gets on
your clothing, change immediately.
This helps reduce the risk of unit
vibrations causing an incorrectly
tightened fuel cap to loosen or come off
and spill quantities of fuel.
Before starting
Check that your power tool is properly
assembled 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! 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 recommends 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
Starting the engine
Start the engine at least 3 meters from
the fueling 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).
While working
In the event of impending danger or in
an emergency, switch off the engine
immediately – move the stop switch to 0
.
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.
Do not direct the air
blast towards bystand-
ers or animals – the
machine may eject
small objects at high
speed – risk of injury!.

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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 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.
When blow-sweeping (in open terrain
and in gardens), 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!
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.
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. Combustible fuel vapor may
escape from the fuel system.
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. Do not continue operating the
machine if it is damaged. In case of
doubt, contact a dealer.
Using the blower
The blower is designed for one-handed
operation. 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 gardens, 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!
To reduce the risk
of injury from
thrown objects, do
not allow any other
persons within 5
meters of your
own position.
Your power tool produces
toxic exhaust fumes as
soon as the engine is
running. These gases
may be odorless and
invisible and may contain
unburned hydrocarbons
and benzene. Never run
the engine indoors or in
poorly ventilated loca-
tions, even if your model
is equipped with a cata-
lytic converter.
0075BA001 KN

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Working Technique
To minimize blowing time, use a rake
and broom to loosen dirt particles before
you start blowing.
Recommended working technique to
minimize air pollution:
–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 children, 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.
Recommended working technique to
minimize noise:
–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.
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.
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 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.
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.

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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. Mounting the Blower Tube
NPush the blower tube (1) with lug (2)
into the fan housing stub (3) and
rotate it in the direction of the arrow
to lock in position.
Removing the Blower Tube
NUse a suitable tool to lift the tab (6)
on the fan housing stub (3).
NRotate the blower tube in the
direction of the arrow and then pull it
out.
Assembling the Blower
3
2
295BA003 KN
1
6
295BA005 KN
3

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8
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.
STIHL MotoMix
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.
STIHL MotoMix uses STIHL HP Ultra
two-stroke engine oil for an extra long
engine life.
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.
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.
Engines equipped with M-Tronic deliver
full power when run on gasoline with an
ethanol content of up to 25% (E25).
Engine Oil
If you mix the fuel yourself, use only
STIHL two-stroke engine oil or another
high-performance engine oil in
accordance with 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.
Mix Ratio
STIHL 50:1 two-stroke engine oil: 50
parts gasoline to 1 part oil
Examples
NUse a canister approved for storing
fuel. Pour oil into canister first, then
add gasoline and mix thoroughly.
Storing Fuel
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.
NThoroughly shake the mixture in the
canister before fueling your
machine.
WARNING
Pressure may build up in the canister –
open it carefully.
NClean the fuel tank and canister
from time to time.
Dispose of remaining fuel and cleaning
fluid properly in accordance with local
regulations and environmental
requirements.
Fuel
Gasoline STIHL engine oil 50:1
Liters Liters (ml)
10.02(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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9
Preparations
NBefore fueling, clean the filler cap
and the area around it to ensure that
no dirt falls into the tank.
NPosition the machine so that the
tank cap faces up.
STIHL recommends you use the STIHL
filler nozzle for fuel (special accessory).
Filling Up with Fuel
Take care not to spill fuel while fueling
and do not overfill the tank.
NOpen the cap.
NFill up with fuel.
NClose the cap.
WARNING
After fueling, tighten down the filler cap
as securely as possible by hand.
Starting the Engine
NObserve safety precautions.
NPress the fuel pump bulb at least
five times – even if the bulb is
already filled with fuel.
NMove the stop switch (1) to the run
position I
Fueling
295BA033 KN
Starting / Stopping the
Engine
0075BA003 KN
2
1
0075BA002 KN

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Setting the choke lever
If the engine is cold
NMove the choke lever (3) to g
NPull the throttle trigger (2) and hold it
there.
NCrank engine until it begins to fire.
NMove the choke lever (3) to e
NPull the throttle trigger (2) and hold it
there.
NContinue cranking until the engine
runs.
If the engine is warm
Also use this setting if the engine has
been running but is still cold.
NMove the choke lever (3) to e
NPull the throttle trigger (2) and hold it
there.
NContinue cranking until the engine
runs.
Cranking
NPlace the unit on the ground so that
it is secure.
NMake sure you have a firm footing:
Hold the unit firmly with your left
hand on the housing and press
down.
NHold the starter grip with your right
hand.
NPull 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.
NDo not let the starter grip snap back.
Guide it slowly back into the housing
so that the starter rope can rewind
properly.
Stopping the Engine
NMove the stop switch to 0
Other Hints on Starting
If the engine stops during warm-up or
acceleration
NRepeat the starting procedure – see
"If the engine is cold".
If engine does not start
NMake sure all settings are correct
(choke shutter, stop switch in run
position I).
NRepeat the starting procedure.
If the engine still does not start
NMove the stop switch to 0
NRemove the spark plug – see
"Spark Plug".
NDry the spark plug.
NCrank the engine several times with
the starter to clear the combustion
chamber.
NRefit the spark plug – see "Spark
Plug".
NMove the stop switch to I
Nset the choke lever to e – even if
the engine is cold.
NPull the throttle trigger (2) and hold it
there.
NNow start the engine.
3
0000-GXX-2832 A0
295BA016 KN

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If fuel tank has been run completely dry
and then refueled
NPress the fuel pump bulb at least
five times – even if the bulb is
already filled with fuel.
NSet the choke lever according to
engine temperature.
NNow start the engine.
If there is a noticeable loss of engine
power
NMove the choke lever to g
NSqueeze the tabs (1) together.
NSwing the filter cover (2) open and
take it away.
NClean away loose dirt from around
the filter.
NTake the filter (3) out of the filter
housing (4).
NInstall a new filter. Temporary
measure: wash the filter.
Replace any damaged parts.
NFit the filter (3) in the filter
housing (4).
NFit the filter cover (2) so that it snaps
into position.
0075BA003 KN
Cleaning the Air Filter
0075BA005 KN
1
2
4
0075BA006 KN
3
2

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12
General Information
The carburetor comes from the factory
with a standard setting.
This setting provides an optimum fuel-air
mixture under most operating
conditions.
Preparations
NShut off the engine.
NCheck the air filter and clean or
replace if necessary.
NCheck the spark arresting screen
(not in all models, country-specific)
in the muffler and clean or replace if
necessary.
Standard Setting
NTurn high speed screw (H)
counterclockwise as far as stop (no
more than 3/4 turn).
NTurn the low speed screw (L)
clockwise as far as stop, then turn it
back 3/4 turn.
Adjusting Idle Speed
NCarry out the standard setting.
NStart and warm up the engine.
Engine stops while idling
NTurn the idle speed screw (LA)
clockwise until the engine runs
smoothly – then back it off a 1/4 turn
from that position.
Erratic idling behavior, poor acceleration
(despite correction to setting of LA
screw).
Idle setting is too lean
NTurn the low speed screw (L)
carefully counterclockwise, no
further than stop, until the engine
runs smoothly and accelerates well.
Erratic idling behavior, engine speed
drops when swinging the machine
Idle setting is too rich
NTurn the low speed screw (L) slowly
clockwise until the engine runs and
accelerates smoothly.
Adjusting the Carburetor
295BA085 KN
295BA086 KN

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It is usually necessary to change the
setting of the idle speed screw (LA) after
every correction to the low speed
screw (L).
Fine Tuning for Operation at High
Altitude
A slight correction of the setting may be
necessary if the engine does not run
satisfactorily:
NCarry out the standard setting.
NWarm up the engine.
NTurn high speed screw (H) slightly
clockwise (leaner) – no further than
stop.
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.
NIf the engine is down on power,
difficult to start or runs poorly at idle
speed, first check the spark plug.
NFit 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".
Removing the Spark Plug
NPull off the spark plug boot (1).
NUnscrew the spark plug.
Checking the Spark Plug
NClean dirty spark plug.
NCheck electrode gap (A) and
readjust if necessary – see
"Specifications".
NRectify the problems which have
caused fouling of the spark plug.
Possible causes are:
–Too much oil in fuel mix.
–Dirty air filter.
–Unfavorable running conditions.
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.
Spark Plug
1
295BA083 KN
000BA039 KN
A
1
000BA045 KN

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NUse resistor type spark plugs with a
properly tightened adapter nut.
Installing the Spark Plug
NScrew the spark plug (3) into the
cylinder and fit the boot (2) (press it
down firmly).
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.
For periods of 3 months or longer
NDrain and clean the fuel tank in a
well ventilated area.
NDispose of fuel properly in
accordance with local
environmental requirements.
NRun the engine until the carburetor
is dry – this helps prevent the
carburetor diaphragms sticking
together.
NThoroughly clean the machine – pay
special attention to the cylinder fins
and air filter.
NStore the machine in a dry, high or
locked location, – out of the reach of
children and other unauthorized
persons.
3
000BA050 KN
2
Engine Running Behavior Storing the Machine

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Maintenance and Care
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.
before starting work after finishing work or daily after each refueling stop weekly monthly every 12 months if problem if damaged as required
Complete machine
Visual inspection (condition, wear,
leaks) xx
Clean x
Control handle Check operation xx
Air filter
Clean xx
Replace xx
Manual fuel pump
Check X
Have repaired by servicing dealer1) X
Pickup body in fuel tank
Check x
Have replaced by dealer1) xxx
Fuel tank Clean xx
Carburetor
Check idle setting xx
Readjust idle x
Spark plug
Readjust electrode gap x
Replace after 100 operating hours
Cooling inlets Clean x
All accessible screws and nuts (not adjust-
ing screws) Retighten x
Safety labels Replace x
1) STIHL recommends an authorized STIHL servicing dealer.

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1Tab
2Spark plug boot
3Carburetor adjusting screw
4Choke lever
5Starter grip
6Manual fuel pump
7Filter housing
8Tank cap
9Fuel tank
10 Muffler
11 Control handle
12 Switch
13 Throttle trigger
14 Intake screen
15 Blower tube
#Serial number
Main Parts
4
56
3
2
10
1
0075BA009 KN
12
13
11
15
#
7
8
9
14

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Engine
STIHL single cylinder two-stroke engine
Ignition System
Electronic magneto ignition
Fuel System
All position diaphragm carburetor with
integral fuel pump
Blowing performance
Weight
Noise and Vibration Data
Noise and vibration data are measured
at idling and maximum rated speed in a
ratio of 1:6.
For further details on compliance with
Vibration Directive 2002/44/EC see
www.stihl.com/vib.
Sound pressure level Lpeq to
DINEN15503
Sound power level Lw to DIN EN 15503
Vibration measurement ahv,eq to DIN
EN 15503
The K-factor in accordance with
Directive 2006/42/EC is 2.0 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 level.
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.
Exhaust Emissions
The CO2value measured in the EU type
approval procedure is specified at
www.stihl.com/co2.
The measured CO2value was
determined on a representative engine
in accordance with a standardized test
procedure under laboratory conditions
and does not represent either an explicit
or implied guarantee of the performance
of a specific engine.
The applicable exhaust emission
requirements are fulfilled by the
intended usage and maintenance
described in this instruction manual. The
type approval expires if the engine is
modified in any way.
Specifications
Displacement: 27.2 cc
Bore: 34 mm
Stroke: 30 mm
Idle speed: 2,800 rpm
Spark plug (resistor
type):
Bosch WSR 6 F,
NGK BPMR 7 A
Electrode gap: 0.5 mm
Fuel tank capacity: 430 cc (0.43 l)
Blowing force: 13 N
Air velocity: 60 m/s
Air flow rate: 700 m3/h
Maximum air velocity 71 m/s
dry: 3.6 kg
BG 50: 92 dB(A)
BG 50: 105 dB(A)
Handle,
right
BG 50: 10,5 m/s2

BG 50
English
18
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 high-
quality replacement parts in order to
avoid the risk of accidents and damage
to the machine.
STIHL recommends the use of original
STIHL replacement parts.
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).
Observe all country-specific waste
disposal rules and regulations.
STIHL products must not be thrown in
the garbage can. Take the product,
accessories and packaging to an
approved disposal site for environment-
friendly recycling.
Contact your STIHL servicing dealer for
the latest information on waste disposal.
ANDREAS STIHL AG & Co. KG
Badstr. 115
D-71336 Waiblingen
Germany
declares under our sole responsibility
that
conforms to the relevant provisions of
Directives 2011/65/EU, 2006/42/EC,
2014/30/EU and 2000/14/EC and has
been developed and manufactured in
compliance with the following standards
in the versions valid on the date of
production:
EN ISO 12100, EN 55012,
EN 61000-6-1
The measured and the guaranteed
sound power level have been
determined in accordance with Directive
2000/14/EC, Annex V, and standard
ISO 11094.
Measured sound power level
Guaranteed sound power level
Technical documents deposited at:
ANDREAS STIHL AG & Co. KG
Produktzulassung
Maintenance and Repairs Disposal
000BA073 KN
EC Declaration of Conformity
Designation: Blower
Make: STIHL
Series: BG 50
Serial identification
number:
4229
Displacement: 27.23
BG 50: 103 dB(A)
BG 50: 105 dB(A)