STIHL BR 500, 550, 600
{
Instruction Manual
Notice d’emploi
G Instruction Manual
1 - 29
F Notice d’emploi
30 - 61
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
4-MIX Engine 11
Fuel 11
Original Instruction ManualPrinted on chlorine-free paper
Fueling 12
Winter Operation 14
Information Before You Start 15
Starting / Stopping the Engine 15
Operating Instructions 17
Replacing the Air Filter 18
Engine Management 18
Adjusting the Carburetor 19
Spark Plug 20
Spark Arresting Screen in Muffler 21
Rewind Starter 21
Storing the Machine 21
Inspections and Maintenance by
Dealer 22
Printing inks contain vegetable oils, paper can be recycled.
Maintenance and Care 23
Main Parts 25
Specifications 26
Maintenance and Repairs 27
Disposal 27
STIHL Limited Emission Control
Warranty Statement 28
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 troublefree 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, 2014
0458-452-8221-F. VA4.L14.
0000000719_014_GB
BR 500, BR 550, BR 600
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 precau
tions must be observed
when working with a
power tool.
It is important that you
read the instruction man
ual 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 to operate your
machine 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 500, BR 550, BR 600
English
The use of noise emitting power tools
may be restricted to certain times by
national or local regulations.
Do not operate your machine if any of its
components are damaged.
Do not use a pressure washer to clean
the unit. 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 a servicing 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 genuine
STIHL replacement parts. 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 power tool 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 free
dom of movement. Wear
snug-fitting clothing, an
overall and jacket combi
nation, do not wear a
work coat.
Avoid any clothing,
scarves, neckties, jewel
ery or anything that could
get into the air intake. Tie
up and confine long hair
(e.g. with a hair net, cap,
hard hat, etc.).
Wear sturdy shoes with non-slip soles.
WARNING
To reduce the risk of eye
injuries, wear close-fit
ting safety glasses in
accordance with Euro
pean Standard EN 166.
Make sure the safety
glasses are a snug fit.
Wear hearing protection, e.g. earplugs
or ear muffs.
STIHL offers a comprehensive range of
personal protective clothing and
equipment.
Transporting the Power Tool
Always stop the engine.
Transporting in a vehicle:
– Properly secure your power tool to
prevent turnover, fuel spillage and
damage.
-
-
-
-
-
BR 500, BR 550, BR 600
3
English
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 unit 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.
Your power tool comes standard with
either a screw-type or bayonet-type fuel
cap.
After fueling, tighten
down the screw-type fuel
cap as securely as
possible.
Insert the fuel cap with
hinged grip (bayonet-type
cap) correctly in the
opening, turn it clockwise
as far as stop and fold the
grip down.
This reduces the risk of unit vibrations
causing the fuel cap to loosen or come
off and spill quantities of fuel.
Check for leakage. To
reduce the risk of serious
of fatal burn injuries, do
not start or run the engine
until leak is fixed.
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 combustible
fumes and cause a fire.
– Never attempt to modify the controls
or the safety devices in any way.
– Check condition of blower housing.
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 the unit if it is not properly
assembled and in good condition.
For emergencies: Practice quickly
opening the fastener on the waist belt,
loosening the shoulder straps and
setting down the unit.
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
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.
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.
4
BR 500, BR 550, BR 600
English
0009BA001 KN
To reduce the risk of personal injury
from thrown objects, do not allow any
other persons within a radius of
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 loca
-
tions, 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 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.
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 unit off your back.
BR 500, BR 550, BR 600
5
English
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
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.
6
BR 500, BR 550, BR 600
English
452BA101 KN
1
2
3
452BA102 KN
1
2
452BA095 KN
1
2
3
452BA096 KN
1
2
3
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.
Maintenance, replacement, or repair of
the emission control devices and
systems may be performed by any
nonroad engine repair establishment or
individual. However, if you make a
warranty claim for a component which
has not been serviced or maintained
properly or if nonapproved replacement
parts were used, STIHL may deny
coverage.
For any maintenance please refer to the
maintenance chart and to the warranty
statement near the end of the instruction
manual.
Assembling the Unit
Mounting the Control Handle
N Pull the two halves of the clamp
apart.
N Push the control handle (1) onto the
blower tube (2).
Mounting the Blower Tubes
BR 500
N Depending on your size and reach:
Push blower tube (1) up to the
appropriate mark on the blower
tube (2).
N Rotate the blower tube (1) in the
direction of the arrow and engage it
in the appropriate slot (3).
BR 550, BR 600
BR 500, BR 550, BR 600
N Line up the control handle (1) with
the tube's seam – as shown.
N Secure the control handle (1) with
the screw (3) so that it can still be
moved on the blower tube (2).
N Depending on your size and reach:
Push blower tube (1) up to the
appropriate mark on the blower
tube (2).
N Rotate the blower tube (1) in the
direction of the arrow and engage it
in the appropriate slot (3).
7
English
2
1
452BA108 KN
3
452BA109 KN
2
1
4
3
2
452BA103 KN
5
6
2
5
452BA104 KN
6
7
3
1
2
452BA111 KN
3
1
2
452BA112 KN
Mounting the Hose Clamps and Pleated
Hose
N Push the hose clamp (1) (with
retainer for throttle cable) onto the
elbow (3) – the positioning marks
must face to the left.
N Push the pleated hose (2) over the
elbow (3).
N Push the hose clamp (1) onto the
pleated hose (2).
N Line up the positioning marks on the
hose clamp (1) and elbow (3) – the
screw eye faces down.
N Secure the hose clamp (1) with the
screw (4).
N Push the hose clamp (5) (without
retainer for throttle cable) onto the
elbow (6) – the positioning marks
must face to the right.
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 nozzle
N Push the nozzle (1) onto the blower
tube (2) and engage it on the
lugs (3).
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).
8
BR 500, BR 550, BR 600
English
3
452BA110 KN
1
2
452BA100 KN
Adjusting the Control Handle
N Move the control handle (1) along
the blower tube (2) to the most
comfortable position.
N Secure the control handle (1) with
the screw (3).
Wear Mark on Nozzle
N Secure the blower tube to the
handle on the backplate.
The front end of the nozzle is worn by
ground contact during operation.
Replace the nozzle when it has worn as
far as the wear mark.
Fitting the Transport Aid
When storing or transporting the
machine:
N Engage the throttle cable (4)
with sleeve (5) in the retainer (6).
BR 500, BR 550, BR 600
N Secure the velcro strip to the blower
tube – pull the flap through the
buckle.
9
English
373BA003 KN
373BA004 KN
Adjusting the Throttle Cable Fitting the Harness
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 Adjust the harness straps so that
the backplate fits snugly and
securely against your back.
A Adjust height
B Adjust angle
Tightening the harness straps
N Set throttle trigger to the full throttle
position – as far as stop.
N Carefully screw home the screw in
the throttle trigger until you feel
initial resistance.
Loosening the harness straps
N Lift the tabs of the sliding adjusters.
10
N Pull the ends of the straps
downward.
BR 500, BR 550, BR 600
English
4-MIX Engine Fuel
The STIHL 4-MIX engine features
mixture lubrication and must be run on a
fuel mixture of gasoline and engine oil.
It operates otherwise on the 4-stroke
principle.
This engine is certified to operate on
unleaded gasoline and with the mix ratio
50:1.
Your engine requires a mixture of highquality premium gasoline and highquality two-stroke air-cooled engine oil.
Use premium branded unleaded
gasoline with a minimum octane rating
of 89 (R+M)/2.
Note: Models equipped with a catalytic
converter require unleaded gasoline. A
few tankfuls of leaded gasoline can
reduce the efficiency of the catalytic
converter by more than 50%.
Fuel with a lower octane rating may
result in preignition (causing "pinging")
which is accompanied by an increase in
engine temperature. This, in turn,
increases the risk of the piston seizure
and damage to the engine.
The chemical composition of the fuel is
also important. Some fuel additives not
only detrimentally affect elastomers
(carburetor diaphragms, oil seals, fuel
lines etc.), but magnesium castings as
well. This could cause running problems
or even damage the engine. For this
reason it is essential that you use only
high-quality fuels!
Fuels with different percentages of
ethanol are being offered. Ethanol can
affect the running behaviour of the
engine and increase the risk of lean
seizure.
Gasoline with an ethanol content of
more than 10% can cause running
problems and major damage in engines
with a manually adjustable carburetor
and should not be used in such engines.
Engines equipped with M-Tronic can be
run on gasoline with an ethanol content
of up to 25% (E25).
Use only STIHL two-stroke engine oil or
equivalent high-quality two-stroke aircooled engine oils for mixing.
We recommend STIHL 50:1 two-stroke
engine oil since it is specially formulated
for use in STIHL engines.
Do not use BIA or TCW (two-stroke
water cooled) mix oils!
Use only STIHL 50:1 heavy-duty engine
oil or an equivalent quality two-stroke
engine oil for the fuel mix in models
equipped with a catalytic converter.
Take care when handling gasoline.
Avoid direct contact with the skin and
avoid inhaling fuel vapour.
The canister should be kept tightly
closed in order to avoid any moisture
getting into the mixture.
The fuel tank and the canister in which
fuel mix is stored should be cleaned
from time to time.
Fuel mix ratio
Only mix sufficient fuel for a few days
work, not to exceed 30 days of storage.
Store in approved safety fuel-canisters
only. When mixing, pour oil into the
canister first, and then add gasoline.
BR 500, BR 550, BR 600
11
English
452BA123 KN
002BA418 KN
002BA419 KN
001BA218 KN
001BA219 KN
Examples
Gasoline Oil (STIHL 50:1 or equiva
-
lent high-quality oils)
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)
Dispose of empty mixing-oil canisters
only at authorized disposal locations.
Fueling
Preparations
N Before fueling, clean the filler cap
and the area around it to ensure that
no dirt falls into the tank.
A number of different filler caps are
installed as standard at the factory.
Threaded filler cap
Opening tank cap with hinged grip
N Swing the grip to the upright
position.
12
Cliplock filler cap (bayonet-type)
N Rotate the cap about 1/4 turn
counterclockwise.
BR 500, BR 550, BR 600
English
001BA224 KN
001BA220 KN
001BA221 KN
001BA222 KN
001BA223 KN
001BA225 KN
001BA227 KN
N Remove the 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 for fuel (special accessory).
N Filling up with fuel
Closing tank cap with hinged grip
Grip must be vertical:
N Fit the cap in the opening – the
marks on the cap and filler neck
must line up.
N Press the cap down as far as stop.
N While holding the cap depressed,
turn it clockwise until it engages in
position.
N Fold the grip flush with the top of the
cap.
Checking security of cap
– The lug on the grip must fully
engage the recess (arrow).
N Grip the cap – it is properly locked if
it cannot be turned or removed.
If the cap can be turned or removed
Bottom of cap is twisted in relation to
top:
Left: Bottom of cap twisted
Right: Bottom of cap correctly
positioned
BR 500, BR 550, BR 600
13
English
001BA226 KN
002BA447 KN
002BA448 KN
452BA084 KN
1
2
452BA085 KN
3
N Place the cap on the opening and
rotate it counterclockwise until it
engages the filler neck.
N Continue rotating the cap
counterclockwise (about a quarter
turn) – this causes the bottom of the
cap to be turned to the correct
position.
N Turn and lock the cap clockwise –
see sections on "Closing" and
"Checking security of cap".
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.
Winter Operation
At temperatures below 10°C:
N Turn the cap counterclockwise until
it can be removed from the tank
opening.
N Remove the cap.
14
N Remove the filter cover (1) and air
filter element (2).
N Loosen the screw (3).
BR 500, BR 550, BR 600
English
4
3
452BA086 KN
452BA020 KN
1
2
452BA115 KN
N Swing the shutter (4) to the winter
position (r).
N Tighten down the screw (3) firmly.
N Refit the filter cover and air filter
element.
At temperatures above 20°C:
N Always return the shutter (4) to the
summer position (s)
NOTICE
since there is otherwise a risk of engine
running problems due to overheating.
Information Before You Start
1 Setting lever
2 Throttle trigger
The three positions of the setting lever
Engine stop 0 – ignition interrupted,
engine stops. The setting lever does not
remain in ths position, it springs back.
Normal run position F – engine runs or is
ready to start. Throttle trigger can be
operated normally.
Lock position C – the throttle trigger can
be locked in three positions: 1/3 throttle,
2/3 throttle and full throttle. To
disengage the lock, move the setting
lever (1) back to the normal run
position F.
Starting / Stopping the
Engine
Starting the Engine
N Observe safety precautions.
NOTICE
Start your unit on a clean, dust-free
surface only to ensure that no dust is
sucked in.
N The setting lever (1) must be on F
BR 500, BR 550, BR 600
N Press the manual fuel pump bulb at
least five times – even if the bulb is
filled with fuel.
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Cold engine (cold start)
N Turn the choke knob to l.
Warm engine (warm start)
N Turn the choke knob to n.
Also use this setting if the engine has
been running but is still cold.
Cranking
N Place the unit securely on the
ground and make sure that
bystanders are well clear of the
nozzle outlet.
N Make sure you have a firm footing:
Hold the unit with your left hand on
the housing and put one foot against
the base plate to prevent it slipping.
N Pull the starter grip slowly with your
right hand until you feel it engage
and then give it a brisk strong pull.
Do not pull out the starter rope to full
length – it might otherwise break.
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 Crank the engine until it begins to
fire. After no more than three
attempts, turn the choke knob to n.
When engine begins to fire
If the engine is cold:
N Turn the choke knob to n 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
Return engine to idle speed:
N Operate the throttle trigger (2) – the
choke knob automatically moves to
the run position (F)
or
N Turn the choke knob to the normal
run position (F).
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BR 500, BR 550, BR 600
English
452BA026 KN
1
At very low outside temperatures
N Open throttle slightly – warm up the
engine for a short period.
Stopping the Engine
N Move the setting lever to 0 – the
engine stops – the setting lever
springs back to the on position.
If the engine does not start
N Turn the choke knob to n.
N Move the setting lever (1) to C.
N Engage the throttle trigger (2) in the
full throttle position.
N Continue cranking until the engine
runs.
Throttle cable adjustment
N Check adjustment of throttle cable –
see chapter on "Adjusting the
Throttle Cable".
Operating Instructions
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 place, well away from sources of
ignition, until you need it again. For
longer out-of-service periods – see
"Storing the Machine".
Choke knob
If you did not turn the choke knob to n
quickly enough after the engine began to
fire, the combustion chamber is flooded.
BR 500, BR 550, BR 600
If fuel tank has been run completely dry
and then refueled
N After refueling, press the manual
fuel pump bulb at least five times –
even if the bulb is filled with fuel.
N Set the choke knob according to
engine temperature.
N Now start the engine.
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English
Replacing the Air Filter Engine Management
Dirty air filters reduce engine power,
increase fuel consumption and make
starting more difficult.
If there is a noticeable loss of engine
power
N Turn the choke knob to l.
N Loosen the screws (1).
N Remove the filter cover (2).
Exhaust emissions are controlled by the
design of the fundamental engine
parameters and components (e.g.
carburation, ignition, timing and valve or
port timing) without the addition of any
major hardware.
N Remove the filter element (3).
N Replace dirty or damaged filters.
N Fit the new filter in the filter housing.
N Fit the filter cover.
N Insert the screws and tighten them
down firmly.
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BR 500, BR 550, BR 600
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