STIHL BR 800
Instruction Manual
Contents
English
Guide to Using this Manual 2
Safety Precautions and Working
Techniques 2
Assembling the Unit 7
Adjusting the Throttle Cable 10
Fitting the Harness 10
Fuel 11
Fueling 12
Original Instruction ManualPrinted on chlorine-free paper
Winter Operation 13
Information Before You Start 13
Starting / Stopping the Engine 14
Operating Instructions 17
Replacing the Air Filter 17
Adjusting the Carburetor 18
Spark Plug 18
Storing the Machine 19
Inspections and Maintenance by
Dealer 19
Maintenance and Care 20
Minimize Wear and Avoid Damage 22
Main Parts 23
Specifications 24
Printing inks contain vegetable oils, paper can be recycled.
Maintenance and Repairs 25
Disposal 25
EC Declaration of Conformity 25
UKCA Declaration of Conformity 26
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
© ANDREAS STIHL AG & Co. KG, 2021
0458-490-0121-B. VA0.H21.
0000008179_007_GB
BR 800
This instruction manual is protected by copyright. All rights reserved, especially the rights to reproduce, translate and process
with electronic systems.
1
English
Guide to Using this Manual
Pictograms
The meanings of the pictograms
attached to the machine are explained in
this manual.
Depending on the model concerned, the
following pictograms may be attached to
your machine.
Fuel tank; fuel mixture of
gasoline and engine oil
Intake air: Winter
operation
Intake air: Summer
operation
Operate manual fuel
pump
Symbols in text
WARNING
Warning where there is a risk of an
accident or personal injury or serious
damage to property.
NOTICE
Caution where there is a risk of
damaging the machine or its individual
components.
Engineering improvements
STIHL's philosophy is to continually
improve all of its products. For this
reason we may modify the design,
engineering and appearance of our
products periodically.
Therefore, some changes, modifications
and improvements may not be covered
in this manual.
Safety Precautions and
Working Techniques
Special safety precautions must be observed
when working with a
power tool.
It is important that you
read the instruction manual before first use and
keep it in a safe place for
future reference. Nonobservance of the
instruction manual may
result in serious or even
fatal injury.
Observe all applicable local safety
regulations, standards and ordinances.
If you have not used this model before:
Have your dealer or other experienced
user show you how it is operated or
attend a special course in its operation.
Minors should never be allowed to use
this product.
Keep bystanders, especially children,
and animals away from the work area.
When the power tool is not in use, put it
in a place where it does not endanger
others. Secure it against unauthorized
use.
The user is responsible for avoiding
injury to third parties or damage to their
property.
Do not lend or rent your power tool
without the instruction manual. Be sure
that anyone using your power tool
understands the information contained
in this manual.
2
BR 800
English
The use of noise emitting power tools
may be restricted to certain times by
national or local regulations.
Do not operate your power tool if any of
its components are damaged.
Do not use a pressure washer to clean
your power tool. The solid jet of water
may damage parts of the power tool.
Accessories and replacement 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 a servicing 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 replacement parts and
accessories. They are specifically
designed to match the product and meet
your performance requirements.
Never attempt to modify your machine 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 Condition
To operate this power tool you must be
rested, in good physical condition and
mental health.
If you have any condition that might be
aggravated by strenuous work, check
with your doctor before operating a
power tool.
Persons with pacemakers only: The
ignition system of your power tool
produces an electromagnetic field of a
very low intensity. This field may
interfere with some pacemakers. To
reduce health risks, STIHL recommends
that persons with pacemakers consult
their physician and the pacemaker
manufacturer before operating this
power tool.
Do not operate the sprayer if you are
under the influence of any substance
(drugs, alcohol) which might impair
vision, dexterity or judgment.
Intended Use
The blower is designed for blowsweeping 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.
Do not blow-sweep hazardous
materials.
Do not use the machine for any other
purpose because of the increased risk of
accidents and damage to the machine.
Never attempt to modify the product in
any way since this may result in
accidents or damage to the product.
Clothing and Equipment
Wear proper protective clothing and
equipment.
Clothing must be sturdy
but allow complete freedom of movement. Wear
snug-fitting clothing, an
overall and jacket combination, do not wear a
work coat.
Avoid clothing with loose
drawstrings, laces and
ribbons, scarves, neckties, jewelry or anything
that could be sucked into
the air intake in the side
and bottom of the
machine. Tie up and confine long hair so that it
cannot be sucked into the
machine.
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 comfortable and snug fit.
Wear hearing protection, e.g. earplugs
or ear muffs.
STIHL offers a comprehensive range of
personal protective clothing and
equipment.
Transporting the Power Tool
Always shut off the engine.
BR 800
3
English
Transporting in a vehicle:
– Properly secure your power tool to
prevent turnover, fuel spillage and
damage.
Fueling
Gasoline is an extremely
flammable fuel. Keep
clear of naked flames. Do
not spill any fuel – do not
smoke.
Always shut off the engine before
refueling.
Do not fuel a hot engine – fuel may spill
and cause a fire.
Always remove the power tool from your
back and put it on the ground before
refueling. Fuel the machine only when it
is standing on the ground.
Open the fuel cap carefully to allow any
pressure build-up in the tank to release
slowly and avoid fuel spillage.
Fuel your power tool only in wellventilated areas. If you spill fuel, wipe
the machine immediately – if fuel gets on
your clothing, change immediately.
Check for leakage. To
reduce the risk of serious
of fatal burn injuries, do
not start or run the engine
until leak is fixed.
Screw-type fuel cap
After fueling, tighten
down the screw-type fuel
cap as securely as
possible.
This reduces the risk of unit vibrations
causing the 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 instruction
manual.
– Check the fuel system for leaks,
paying special attention to visible
parts such as the tank cap, hose
connections and the manual fuel
pump (on machines so equipped). If
there are any leaks or damage, do
not start the engine – risk of fire.
Have your machine repaired by a
servicing dealer before using it
again.
– Throttle trigger must move freely
and spring back to the idle position
when released.
– The setting lever must move easily
to STOP or 0
– The blower tubes must be properly
assembled.
– Keep the handles dry and clean –
free from oil and dirt – for safe
control of the power tool.
– Check that the spark plug boot is
secure – a loose boot may cause
arcing that could ignite leaking fuelair mixture and cause a fire.
– Never attempt to modify the controls
or the safety devices in any way.
– Check condition of blower housing.
– Check condition of harness straps
and backpack – replace damaged
or worn straps.
A worn blower housing (cracks, nicks,
chips) may result in an increased risk of
injury from thrown foreign objects. If the
blower housing is damaged, consult
your dealer – STIHL recommends you
contact a STIHL servicing dealer.
To reduce the risk of accidents, do not
operate your power tool if it is not in a
safe condition.
For emergencies: Practice quickly
opening the fastener on the waist belt,
loosening the shoulder straps and
setting down the unit.
Start 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
instruction manual.
Place the power tool on level ground,
make sure you have secure footing, hold
the power tool securely.
As soon as the engine starts, the air flow
may throw small objects (e.g. stones) in
your direction.
4
BR 800
English
During Operation
In the event of impending danger or in
an emergency, switch off the engine
immediately by moving the setting lever
to STOP or 0.
To reduce the risk of injury from thrown
objects, do not allow any other persons
within 15 meters of your own position.
To reduce the risk of damage to
property, also maintain this distance
from other objects (vehicles, windows).
Do not direct the air blast
towards bystanders or
animals since the air flow
can blow small objects at
great speed – risk of
injury.
When blow-sweeping (in open ground
and gardens), watch out for small
animals to avoid harming them.
Never leave a running machine
unattended.
Take special care in slippery conditions
– damp, snow, ice,
on slopes and uneven ground.
Watch out for obstacles: Be careful of
refuse, tree stumps, roots and ditches
which could cause you to trip or stumble.
Never work on a ladder or any other
insecure support.
Be particularly alert and cautious when
wearing hearing protection because
your ability to hear warnings (shouts,
alarms, etc.) is restricted.
Work calmly and carefully – in daylight
conditions and only when visibility is
good. Stay alert so as not to endanger
others.
To reduce the risk of accidents, take a
break in good time to avoid tiredness or
exhaustion.
Your power tool produces
toxic exhaust fumes as
soon as the engine is
running. These fumes
may be colorless and
odorless and contain
unburned hydrocarbons
and benzol. Never run
the engine indoors or in
poorly ventilated locations, even if your model
is equipped with a catalytic converter.
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.
To reduce the risk of accidents, stop
work immediately in the event of
nausea, headache, visual disturbances
(e.g. reduced field of vision), problems
with hearing, dizziness, deterioration in
ability to concentrate. Apart from other
possibilities, these symptoms may be
caused by an excessively high
concentration of exhaust gases in the
work area.
To reduce the risk of fire, do not smoke
while operating or standing near your
power tool. Note that combustible fuel
vapor may escape from the fuel system.
If dust levels are very high, always wear
a suitable respirator.
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.
After finishing work, put the unit down on
a level, non-flammable surface. To
reduce the risk of fire, do not put it down
near easily combustible materials (e.g.
wood chips, bark, dry grass, fuel).
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 Work". Check the fuel
system in particular for leaks and make
sure the safety devices are working
properly. Do not continue operating your
power tool if it is damaged. In case of
doubt, consult your servicing dealer.
BR 800
5
English
0009BA001 KN
Using the Blower
The machine is carried as a backpack.
Hold and control the blower tube with
your right hand on the control handle.
Walk slowly forwards as you work –
observe the nozzle outlet at all times –
do not walk backwards – risk of
stumbling.
Always shut off the engine before taking
the machine off your back.
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:
– Keeping your hands warm
– Work breaks
The period of usage is shortened by:
– Any personal tendency to suffer
from poor circulation (symptoms:
frequently cold fingers, itching).
– Low outside temperatures.
– Gripping force (a tight grip hinders
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
6
BR 800
English
1
0416BA001 KN
2
3
2
1
4
0416BA002 KN
3
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 since there is otherwise a
risk of fire from uncontained sparking.
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.
Shut off the engine before rectifying
problems.
Assembling the Unit
Mounting the Hose Clamps and Pleated
Hose
N Push the hose clamp (1) (with
retainer for throttle cable) onto the
elbow (3).
N Push the pleated hose (2) over the
elbow (3).
N Push the hose clamp (1) onto the
pleated hose (2) – screw boss
facing down.
N Secure the hose clamp (1) with the
screw (4).
BR 800
7
English
0416BA003 KN
5
6
2
5
6
2
0416BA004 KN
7
4
6
5
0416BA008 KN
0416BA007 A1
1
2
3
3
0416BA005 KN
1
2
N Push the hose clamp (5) (without
retainer for throttle cable) onto the
blower tube (6).
N Push the blower tube (6) into the
pleated hose (2).
N Push the hose clamp (5) onto the
pleated hose (2).
N Line up the hose clamp (5) and
blower tube (6) – as shown.
N Secure the hose clamp (5) with the
screw (7).
Mounting the Control Handle
3
1
2
N Push the control handle (1) onto the
mount (2) .
N Insert and tighten down the
screws (3) firmly.
N Engage the throttle cable (4) with
sleeve (5) in the retainer (6).
Adjusting the Control Handle
0000-GXX-2045-A1
N Open the clamping lever (3).
N Move the control handle (1) along
the blower tube (2) to the most
comfortable position.
N Close the clamping lever (3).
Mounting, Adjusting and Removing the
Nozzle
Mounting the Nozzle
N Push the nozzle (1) onto the blower
tube (2) and engage it on the
lugs (3).
8
BR 800
English
1
3
0416BA006 KN
2
0416BA009 KN
Removing the Nozzle
N Rotate the nozzle (1) in the direction
of the arrow until the lugs (3) are
covered.
N Pull the nozzle (1) off the blower
tube (2).
Adjusting the Blower Tube
1
2
Wear Mark on Nozzle
The front end of the nozzle wears away
due to abrasive ground contact during
operation. The nozzle is subject to
normal wear and tear and must be
replaced when the wear mark is
reached.
Transport Aid
The blower tube can be hooked to the
blower housing for storage and
transport.
N Unhook the blower tube before
starting the engine.
NOTICE
If clothing or other objects are hung on
the hook, the intake openings may be
covered and cause the engine to
overheat.
N Use the hook only for hanging up
the blower tube for storage or
transport.
N Do not hang clothing or other items
on the hook.
N Loosen the union nut (1).
N Pull the blower tube (2) out to the
required length.
N Tighten the union nut (1).
BR 800
0416BA015 KN
0000-GXX-5383-A0
N Attach D-ring to the hook on the
blower housing.
WARNING
Air or dirt particles can be blown into the
user’s face and eyes if the engine is
started while the blower tube is still on
the hook.
9
English
002BA655 KN
A
B
271BA047 KN
C
D
271BA048 KN
Adjusting the Throttle Cable
It may be necessary to correct the
adjustment of the throttle cable after
assembling the machine or after a
prolonged period of operation.
Adjust the throttle cable only when the
unit is completely and properly
assembled.
N Set the throttle trigger to the full
throttle position.
N Carefully rotate the screw in the
throttle trigger in the direction of the
arrow until you feel initial resistance.
Then rotate it another half turn in the
same direction.
Fitting the Harness
Adjusting the Harness
C Close the buckle by pushing the two
parts together.
D Squeeze the hooks to open the
buckle.
A Pull the straps to tighten the
harness
B Lift the tabs of the adjusters to
loosen the straps
10
BR 800
English
1
2
0000-GXX-6235-A0
Fitting the harness
N Put the blower on your back.
N Close the buckle on the waist belt
(1).
N Close the buckle on the chest strap
(2).
N Tighten the straps until the waist
belt fits snugly on your hips and the
back padding is against your back.
Removing the Harness
N Loosen the straps.
N Open the buckles on the chest strap
and waist belt.
N Take the blower off your back.
Fuel
Your engine requires a mixture of
gasoline and engine oil.
WARNING
For health reasons, avoid direct skin
contact with gasoline and avoid inhaling
gasoline vapor.
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 twostroke engine oil or an equivalent highperformance 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
Gasoline STIHL engine oil 50:1
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)
N Use a canister approved for storing
fuel. Pour oil into canister first, then
add gasoline and mix thoroughly.
BR 800
11
English
452BA123 KN
002BA447 KN
002BA448 KN
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.
N Thoroughly shake the mixture in the
canister before fueling your
machine.
WARNING
Pressure may build up in the canister –
open it carefully.
N Clean 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.
Fueling
Preparations
N Before fueling, clean the filler cap
and the area around it to ensure that
no dirt falls into the tank.
Opening screw-type tank cap
Filling up with fuel
Take care not to spill fuel while fueling
and do not overfill the tank. STIHL
recommends you use the STIHL filler
nozzle (special accessory).
Closing screw-type tank cap
N Place the cap in the opening.
N Turn the cap clockwise as far as
stop and tighten it down as firmly as
possible by hand.
12
N Turn the cap counterclockwise until
it can be removed from the tank
opening.
N Remove the cap.
BR 800
English
2
1
0416BA010 KN
Winter Operation
At temperatures below +10°C
3
1
2
N Loosen the screws (1).
N Remove the filter cover (2) together
with the air filter (3).
4
N Move the shutter (4) to the right to
position r (winter operation).
N Fit the filter cover (2) with air
filter (3) in position.
N Insert the screws (1) and tighten
them down firmly.
At temperatures above +20°C
N Move the shutter (4) to the left to
position s (summer operation).
NOTICE
If the shutter (4) is not moved to
position s at temperatures above
20°C, there is a risk of engine running
0000-GXX-5388-A0
problems caused by overheating.
Information Before You Start
NOTICE
With the engine stopped, check the
following parts before starting and clean
0000-GXX-5389-A0
if necessary:
– Base plate
– Intake screen between backplate
and engine
Positions of Setting Lever
1 Setting lever
2 Throttle trigger
Position “F”
Engine runs or is ready to start. Throttle
trigger (2) can be moved to any position.
Position “†”
Ignition is interrupted, engine stops. The
setting lever (1) is not locked in this
position. It springs back to position “F”.
The ignition is switched on again.
BR 800
13
English
0416BA013 KN
2
1
0416BA011 KN
0000-GXX-5390-A0
Fixed throttle
The throttle trigger (2) can be locked in
any position.
To disengage the lock:
N Return the setting lever (1) to
position “F”.
Starting / Stopping the
Engine
Starting the Engine
N Observe safety precautions.
NOTICE
Start your machine on a clean, dust-free
surface only to ensure that no dust is
sucked in.
N Move the setting lever to F
Cold engine (cold start)
0000-GXX-5391-A00000-GXX-6223-A0
N Turn the choke knob to c.
Warm engine (warm start)
N Turn the choke knob to o.
Also use this setting if the engine has
been running but is still cold.
14
N Press the fuel pump bulb at least 6
times – even if the bulb is already
filled with fuel.
BR 800
English
0000-GXX-5392-A0
2
0416BA012 KN
0416BA016 KN
Cranking
N Place the machine securely on the
ground – make sure that bystanders
are well clear of the nozzle outlet
and
N take the blower tube off the hook on
the blower housing (transport
position).
N Make sure you have a firm footing:
Hold the machine with your left hand
on the housing and put one foot
against the base plate to prevent it
slipping.
N Pull the starter grip steadily and
quickly with your right hand. Do not
pull out the starter rope to full length
– it might otherwise break.
N Do not let the starter grip snap back.
Guide it slowly back into the housing
so that the starter rope can rewind
properly.
N Continue cranking until the engine
fires.
When Engine Begins to Fire
If the engine is cold:
0000-GXX-5394-A0
N Turn the choke knob to o and
continue cranking until the engine
runs.
If the engine is warm:
N Continue cranking until the engine
runs.
As Soon As the Engine Runs
N Turn the choke knob to F.
The engine settles down to idling speed.
At very low outside temperatures
N Allow engine to run in the cold start
position c until it almost stalls.
N If the engine stalls in the cold start
position c, turn the choke knob to
o and restart the engine.
Stopping the Engine
N Push the setting lever in the
direction of † – the engine stops –
the setting lever then springs back
automatically.
After Short Work Breaks
If the blower was running and the engine
shut down, it can be restarted on your
back after short work breaks.
BR 800
N Blip the throttle trigger (2) – the
choke knob automatically returns to
F
or
15
English
0000-GXX-5395-A0
0416BA013 KN
2
1
N Machine is on your back – make
sure that bystanders are well clear
of the nozzle outlet.
N Make sure you have a safe and
secure footing.
N Hold blower tube with your right
hand on the control handle.
N Pull the starter grip steadily and
quickly with your left hand. Do not
pull out the starter rope to full length
– it might otherwise break.
N Do not let the starter grip snap back.
Guide it slowly back into the housing
so that the starter rope can rewind
properly.
N Continue cranking until the engine
runs.
If Engine Does Not Start
Choke Knob
If you did not turn the choke knob to o
quickly enough after the engine began to
fire, the combustion chamber is flooded.
N Push the setting lever (1) upwards.
The throttle trigger (2) is in the full
throttle position.
N Continue cranking until the engine
runs.
Other Hints on Starting
If the engine does not start
N Check that all settings are correct.
N Check that there is fuel in the tank
and refuel if necessary.
N Check that the spark plug boot is
properly connected.
N Repeat the starting procedure.
N Check adjustment of throttle cable –
see chapter on "Adjusting the
Throttle Cable".
Engine stalls in cold start position c or
under acceleration
N Turn the choke knob to o and
continue cranking until the engine
runs.
Engine does not start in warm start
position o
N Move the choke knob to c and
continue cranking until the engine
runs.
Fuel tank run until completely dry
N After refueling, depress the manual
fuel pump bulb at least 6 times –
even if the bulb is already filled with
fuel.
N Set the choke knob according to
engine temperature.
N Start the engine.
16
BR 800
English
Operating Instructions Replacing the Air Filter
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 helps protect enginemounted components (ignition,
carburetor) from thermal overload.
After Finishing Work
Storing for a short period: Wait for the
engine to cool down. Keep the machine
in a dry plac e, wel l awa y from sou rces of
ignition, until you need it again. For
longer out-of-service periods – see
"Storing the Machine".
Dirty air filters reduce engine power,
increase fuel consumption and make
starting more difficult.
If There is a Noticeable Loss of Engine
Power
3
1
N Fit the filter cover (2) with air
filter (3) in position.
N Insert the screws (1) and tighten
them down firmly.
BR 800
2
0000-GXX-5388-A0
N Loosen the screws (1).
N Remove the filter cover (2) together
with the air filter (3).
N Remove the air filter (3) from the
filter cover.
N Replace a dirty or damaged air filter
(3).
N Fit the new air filter (3) in the filter
cover (2).
17
English
3
4
2
1
0000-GXX-5396-A0
000BA039 KN
A
1
000BA045 KN
Adjusting the Carburetor
Adjusting Idle Speed
Engine stops while idling:
N Turn the idle speed screw (LA)
slowly clockwise until the engine
runs smoothly.
Spark Plug
N If the engine is down on power,
difficult to start or runs poorly at idle
speed, first check the spark plug.
N Fit a new spark plug after about 100
operating hours – or sooner if the
electrodes are badly eroded. Install
only suppressed spark plugs of the
type approved by STIHL – see
"Specifications".
Removing the Spark Plug
0000-GXX-6224-A0
N Loosen the screw (1).
N Remove the cover (2).
N Pull off the spark plug boot (3).
N Unscrew the spark plug (4).
Checking the Spark Plug
N Clean dirty spark plug.
N Check electrode gap (A) and
readjust if necessary – see
"Specifications".
N Rectify the problems which have
caused fouling of the spark plug.
Possible causes are:
– 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
18
can result result in serious injuries or
damage to property.
BR 800
English
N Use resistor type spark plugs with a
properly tightened adapter nut.
Installing the Spark Plug
3
1
4
2
N Screw the spark plug (4) into the
cylinder and fit the boot (3) (press it
down firmly).
N Fit the cover (2).
N Insert and tighten down the
screw (1).
NOTICE
If the blower is operated without the
cover (2), the engine may overheat and
this can result in engine damage.
N Operate your blower only with the
cover fitted in position.
Storing the Machine
For periods of about 3 months or longer
N Drain and clean the fuel tank in a
well ventilated area.
N Dispose of fuel properly in
accordance with local
environmental requirements.
N Run the engine until the carburetor
is dry – this helps prevent the
0000-GXX-6234-A0
carburetor diaphragms sticking
together.
N Thoroughly clean the machine – pay
special attention to the cylinder fins
and air filter.
N Store the machine in a dry and safe
location. Keep out of the reach of
children and other unauthorized
persons.
Hanging the Blower on a Hook
The hole (arrow) in the backplate can be
used to hang up the blower.
Inspections and Maintenance
by Dealer
Fuel pickup body in tank
N Have the pickup body in the fuel
tank replaced every year.
STIHL recommends that you have
servicing and repair work carried out
exclusively by an authorized STIHL
servicing dealer.
BR 800
0000-GXX-5387-A0
19
English
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
Complete machine
Rear handle Check operation XX
Air filter Replace X
Manual fuel pump
Filter in fuel tank
Fuel tank Clean X
Carburetor
Spark plug
Cooling air inlet
Valve clearance
Combustion chamber
All accessible screws and nuts (not adjusting screws)
Antivibration elements
Visual inspection (condition, leaks) XX
Clean X
Check X
Have repaired by servicing dealer
Have checked by servicing dealer
Have filter replaced by servicing dealer
Check idle adjustment XX
Readjust idle X
Readjust electrode gap X
Replace after every 100 operating hours
Visual inspection X
Clean X
If power is low or cranking effort very
high, have valve clearance checked
and, if necessary, adjusted by servicing
1)
dealer
Have cleaned after every 150 hours of
operation by servicing dealer
Retighten X
Check X
Have replaced by servicing dealer
1)
1)
1)
1)
1)
XX
if problem
if damaged
as required
X
X
XX
X
XX
20
BR 800
English
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
Blower air intake screen
Base plate
Throttle cable Adjust X
Safety labels Replace X
1)
STIHL recommends an authorized STIHL servicing dealer.
Check XX
Clean X
Check XX
Clean X
as required
BR 800
21
English
Minimize Wear and Avoid
Damage
Observing the instructions in this manual
helps reduce the risk of unnecessary
wear and damage to the power tool.
The power tool must be operated,
maintained and stored with the due care
and attention described in this owner's
manual.
The user is responsible for all damage
caused by non-observance of the safety
precautions, operating and maintenance
instructions in this manual. This includes
in particular:
– Alterations or modifications to the
product not approved by STIHL.
– Using tools or accessories which
are neither approved or suitable for
the product or are of a poor quality.
– Using the product for purposes for
which it was not designed.
– Using the product for sports or
competitive events.
– Consequential damage caused by
continuing to use the product with
defective components.
Maintenance Work
All the operations described in the
"Maintenance Chart" must be performed
on a regular basis. If these maintenance
operations cannot be performed by the
owner, they should be performed by a
servicing dealer.
STIHL recommends that you have
servicing and repair work carried out
exclusively by an authorized STIHL
servicing dealer. STIHL dealers are
regularly given the opportunity to attend
training courses and are supplied with
the necessary technical information.
If these maintenance operations are not
carried out as specified, the user
assumes responsibility for any damage
that may occur. Among other parts, this
includes:
– Damage to the engine due to
neglect or deficient maintenance
(e.g. air and fuel filters), incorrect
carburetor adjustment or
inadequate cleaning of cooling air
inlets (intake ports, cylinder fins).
– Corrosion and other consequential
damage resulting from improper
storage.
– Damage to the machine resulting
from the use of poor quality
replacement parts.
Parts Subject to Wear and Tear
Some parts of the power tool are subject
to normal wear and tear even during
regular operation in accordance with
instructions and, depending on the type
and duration of use, have to be replaced
in good time. Among other parts, this
includes:
– Filters (air, fuel)
– Rewind starter
– Spark plug
– Damping elements of anti-vibration
system
22
BR 800
Main Parts
1 2 3 4
5
6
7 8
9
10
11
12
13
1415
19
20
21
#
18
17
16
0000-GXX-6232-A0
English
1 Nozzle
2 Blower Tube
3 Union Nut
4 Throttle Trigger
5 Setting Lever
6 Control Handle
7 Clamping Lever
8 Pleated Hose
9 Harness
10 Backplate
11 Intake Screen
12 Air Filter
13 Tank Cap
14 Base Plate
15 Starter Grip
16 Idle Speed Screw (LA)
17 Choke Knob
18 Manual Fuel Pump
19 Spark Plug Boot
20 Fuel Tank
21 Muffler
# Serial Number
BR 800
23
English
Specifications
Engine
STIHL 4-MIX Engine
Displacement: 79.9 cc
Bore: 50 mm
Stroke: 40.7 mm
Idle speed: 2,500 rpm
Ignition System
Electronic magneto ignition
Spark plug (resistor
type): NGK CMR 6 H
Electrode gap: 0.5 mm
Fuel System
All position diaphragm carburetor with
integral fuel pump
Fuel tank capacity: 2000 cc (2.0 l)
Blowing performance
Weight
dry: 11.7 kg
Noise and Vibration Data
For further details on compliance with
Vibration Directive 2002/44/EC see
www.stihl.com/vib.
Sound pressure level L
p
to
DINEN15503
104 dB(A)
Sound power level Lw to DIN EN 15503
112 dB(A)
Vibration level a
to DIN EN 15503
hv,eq
Standard version
Handle,
right
BR 800: 3.5 m/s
2
Version with bike handle
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 CO
value was
2
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.
Blowing force: 41 N
Air velocity: 81 m/s
Air flow rate: 1700 m
Maximum air velocity: 97 m/s
Maximum air flow rate with-
2025 m
out blower tube:
24
Handle,
Handle, left
3
/h
BR 800: 2.9 m/s
2
right
2.3 m/s
2
The K-factor in accordance with
3
/h
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/s
2
for the vibration level.
BR 800
English
000BA073 KN
Maintenance and Repairs Disposal
Users of this machine may only carry out
the maintenance and service work
described in this user manual. All other
repairs must be carried out by a
servicing dealer.
STIHL recommends that you have
servicing and repair work carried out
exclusively by an authorized STIHL
servicing dealer. STIHL dealers are
regularly given the opportunity to attend
training courses and are supplied with
the necessary technical information.
When repairing the machine, only use
replacement parts which have been
approved by STIHL for this power tool or
are technically identical. Only use highquality replacement parts in order to
avoid the risk of accidents and damage
to the machine.
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 environmentfriendly recycling.
Contact your STIHL servicing dealer for
the latest information on waste disposal.
EC Declaration of Conformity
ANDREAS STIHL AG & Co. KG
Badstr. 115
D-71336 Waiblingen
Germany
declare under our sole responsibility that
Designation: Blower
Make: STIHL
Series: BR 800
BR 800 C
Serial identification
number:
Displacement: 79.9cm
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 15503, 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
4283
3
BR 800
110 dB(A)
Guaranteed sound power level
112 dB(A)
Technical documents deposited at:
ANDREAS STIHL AG & Co. KG
Produktzulassung
25
English
The year of manufacture and serial
number are applied to the product.
Done at Waiblingen, 15.07.2021
ANDREAS STIHL AG & Co. KG
pp
Dr. Jürgen Hoffmann
Director Product Certification &
Regulatory Affairs
UKCA Declaration of
Conformity
ANDREAS STIHL AG & Co. KG
Badstr. 115
D-71336 Waiblingen
Germany
declare under our sole responsibility that
Designation: Blower
Make: STIHL
Series: BR 800
BR 800 C
Serial identification
number:
Displacement: 79.9cm
conforms to the relevant provisions of
UK regulations The Restriction of the
Use of Certain Hazardous Substances
in Electrical and Electronic Equipment
Regulations 2012, Supply of Machinery
(Safety) Regulations 2008,
Electromagnetic Compatibility
Regulations 2016 and Noise Emission in
the Environment by Equipment for use
Outdoors Regulations 2001 and has
been manufactured in compliance with
the following standards in the versions
valid on the date of production:
EN ISO 12100, EN 15503, EN 55012,
EN 61000-6-1
The measured and guaranteed sound
power levels were determined in
accordance with the UK regulation
Noise Emission in the Environment by
Equipment for Use Outdoors
Regulations 2001, Schedule 8, using
the ISO 11094 standard.
4283
3
Measured sound power level
110 dB(A)
Guaranteed sound power level
112 dB(A)
Technical documents deposited at:
ANDREAS STIHL AG & Co. KG
The year of manufacture and serial
number are indicated on the product.
Done at Waiblingen, 15.07.2021
ANDREAS STIHL AG & Co. KG
pp
Dr. Jürgen Hoffmann
Director Product Certification &
Regulatory Affairs
26
BR 800
English
BR 800
27
English
28
BR 800
0458-490-0121-B
englisch
G
www.stihl.com
*04584900121B*
0458-490-0121-B
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