Stihl BR 350, BR 430 Instruction Manual [en, fr]
STIHL BR 350, 430
{
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 11
Fuel 11
Fueling 12
Original Instruction ManualPrinted on chlorine-free paper
Information Before You Start 13
Starting / Stopping the Engine 14
Operating Instructions 16
Replacing the Air Filter 17
Engine Management 17
Adjusting the Carburetor 18
Spark Plug 19
Engine Running Behavior 20
Rewind Starter 20
Storing the Machine 20
Inspections and Maintenance by
Dealer 21
Maintenance and Care 22
Main Parts 24
Printing inks contain vegetable oils, paper can be recycled.
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
0458-456-8221-C. VA3.K14.
0000004890_009_GB
BR 350, BR 430
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
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 350, BR 430
English
The use of noise emitting power tools
may be restricted to certain times by
national or local regulations.
Do not operate your unit 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 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 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 unit 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 power tool for any other
purpose because of the increased risk of
accidents and damage to the power tool
itself. 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 snug-fitting
safety glasses in accord
ance with European
Standard EN 166. Make
sure the safety glasses
are a good fit.
Wear hearing protection, e.g. earplugs
or ear muffs.
STIHL offers a comprehensive range of
personal protective clothing and
equipment.
Transporting the Unit
Always stop the engine.
Transporting in a vehicle:
– Properly secure your power tool to
prevent turnover, fuel spillage and
damage.
-
-
-
-
BR 350, BR 430
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.
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 tank 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 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 350, BR 430
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 unit 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 350, BR 430
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 350, BR 430
English
0009BA002 KN
1
2
0009BA003 KN
3
4
2
3
0009BA004 KN
4
0009BA027 KN
0009BA005 KN
6
5
5
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
The combination wrench and
screwdriver are in the supplied
accessory bag.
BR 350 Blower Tube
Fitting the pleated hose on the elbow
N Ease the slip ring (2) apart and push
it over the elbow (1).
N Push the pleated hose (4) over the
slip ring (2) as far as stop.
N Position the hose clamp (3) as
shown in the illustration.
N Tighten down the screw (arrow).
Mounting the blower tubes and nozzle
N Open the hose clamp (3) and fit it on
the pleated hose (4).
N Close the hose clamp (3) – engage
tab in recess.
BR 350, BR 430
N Assemble the blower tubes (5) and
nozzle (6).
7
English
3
0009BA006 KN
7
0009BA007 KN
5
7
452BA101 KN
1
2
3
452BA102 KN
1
2
452BA096 KN
1
2
3
2
1
452BA108 KN
3
Mounting the control handle
N Pull the ends of the clamp on the
control handle (7) apart and push it
over stub of pleated hose (4).
N Attach throttle cable to retainer on
the hose clamp (3).
Adjusting the control handle
N Put the machine on your back and
adjust the harness – see "Fitting the
Harness".
BR 430 Blower Tube
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
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).
Mounting the hose clamps and pleated
hose
N Push the blower tube (5) into the
stub of pleated hose (4) as far as
the stop.
N Move the control handle (7) along
the tube to the most comfortable
position.
N Tighten down the screw in the
control handle (7).
8
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 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).
BR 350, BR 430
Removing the nozzle
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
3
452BA110 KN
1
2
English
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 recess facing 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).
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 control handle
N Put the machine on your back and
adjust the harness – see "Fitting the
Harness".
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).
BR 350, BR 430
9
English
452BA100 KN
0009BA008 KN
N Engage the throttle cable (4) with
sleeve (5) in the retainer (6).
Wear mark on nozzle
N Secure the velcro strip to the blower
tube – pull the flap through the
buckle.
N Secure the blower tube to the
handle on the backplate.
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 throttle trigger to the full throttle
position – as far as stop.
N Carefully rotate the screw in the
throttle trigger in the direction of the
arrow until you feel initial resistance.
Then rotate it another full turn.
The front end of the nozzle wears away
due to abrasive 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:
10
BR 350, BR 430
English
373BA003 KN
373BA004 KN
Fitting the Harness
Adjusting the Harness
N Pull the ends of the straps
downwards to tighten the harness.
Loosening the Harness
N Lift the tabs of the sliding adjusters.
N Adjust the harness so that the
backplate fits snugly and securely
against your back.
Fuel
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 350, BR 430
11
English
0002BA086 KN
0002BA091 KN
0002BA092 KN
0002BA014 KN
2.
1.
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
Screw-type tank cap
Opening the bayonet-type fuel cap
WARNING
Never use a tool to open the bayonettype fuel cap. This may damage the cap
and cause fuel leakage.
N Before fueling, clean the filler cap
and the area around it to ensure that
no dirt falls into the tank.
N Position the machine so that the
filler cap faces up.
Your power tool comes standard with
either a screw-type or bayonet-type fuel
cap.
12
N Press the bayonet-type fuel cap
down as far as stop, turn it
counterclockwise (about 1/8 turn)
and remove.
Filling up with fuel
Take care not to spill fuel while fueling
Bayonet fuel cap
and do not overfill the tank. STIHL
recommends you use the STIHL filler
nozzle for fuel (special accessory).
BR 350, BR 430
English
0002BA015 KN
2.
1.
002BA447 KN
002BA448 KN
2
1
0009BA009 KN
Closing the bayonet-type fuel cap
N Place the cap on the tank opening
and turn it until it slips into position.
N Press the fuel cap down by hand as
far as stop and turn it clockwise
(about 1/8 turn) until it engages.
Opening screw-type tank cap
N Turn the cap counterclockwise until
it can be removed from the tank
opening.
N Remove the cap.
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.
Information Before You Start
NOTICE
With the engine stopped and before
starting, check the air intakes between
the backplate and powerhead for
blockages and clean if necessary.
Positions of setting lever – BR 350
Run position F
Engine runs or is ready to start. Throttle
trigger (2) can be moved to any position.
Switch off engine †
Ignition is interrupted, engine stops. The
setting lever (1) is not locked in this
position. It springs back to the run
position F. The ignition is switched on
again.
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).
BR 350, BR 430
13
English
2
1
0009BA010 KN
452BA122 KN
1
2
0009BA011 KN
0009BA021 KN
Fixed throttle
The throttle trigger (2) can be locked in
any position:
To disengage the lock:
N Return the setting lever (1) to the
run position F.
Positions of setting lever – BR 430
Lock positions C
The throttle trigger (2) 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.
BR 350
BR 430
Run position F
Engine runs or is ready to start. Throttle
trigger (2) can be moved to any position.
Switch off engine †
Ignition is interrupted, engine stops. The
setting lever (1) is not locked in this
position. It springs back to the run
position F. The ignition is switched on
again.
14
N The setting lever must be on F
BR 350, BR 430
English
0009BA012 KN
H
LA
L
0009BA013 KN
0009BA014 KN
0009BA028 KN
0009BA016 KN
0009BA022 KN
0009BA017 KN
N Press the fuel pump bulb at least
eight times – even if the bulb is filled
with fuel.
Cold engine (cold start)
N Push the choke knob in and turn it to
c.
Warm engine (warm start)
N Push the choke knob in and turn it to
o.
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 Continue cranking until the engine
runs.
As soon as the engine runs
BR 350
BR 430
N Operate the throttle trigger.
N Choke knob automatically returns to
the run position e when the throttle
trigger is operated.
At very low outside temperatures
N Open throttle slightly – warm up the
engine for a short period.
BR 350, BR 430
15
English
0009BA018 KN
0009BA023 KN
Stopping the Engine
BR 350
BR 430
N Move the setting lever in the
direction of † – the engine stops –
the setting lever springs back to the
on position.
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.
Fuel tank run until completely dry
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 Start the engine.
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".
Other Hints on Starting
Engine stalls in cold start position c or
under acceleration
N Move 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.
16
BR 350, BR 430
English
1
0002BA088 KN
1
2
0002BA089 KN
3
Replacing the Air Filter
Dirty air filters reduce engine power,
increase fuel consumption and make
starting more difficult.
If there is a noticeable loss of engine
power
Engine Management
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 Fit the screws and tighten them
down firmly.
N Turn the choke knob to c .
N Loosen the screws (1).
N Remove the filter cover (2).
BR 350, BR 430
17
English
0002BA082 KN
H
L
0002BA083 KN
LA
L
Adjusting the Carburetor
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
N Shut off the engine.
N Check the air filter and clean or
replace if necessary.
N Check that the throttle cable is
properly adjusted – readjust if
necessary – see chapter on
"Adjusting the Throttle Cable".
N Check the spark arresting screen
(not in all models, country-specific)
in the muffler and clean or replace if
necessary.
18
Standard Setting
N Turn high speed screw (H)
counterclockwise as far as stop (no
more than 3/4 turn).
N Turn the low speed screw (L)
clockwise as far as stop, then turn it
back 3/4 turn.
Adjusting Idle Speed
N Carry out the standard setting.
N Start and warm up the engine.
Engine stops while idling
N Turn the idle speed screw (LA)
slowly clockwise until the engine
runs smoothly.
Erratic idling behavior, engine stops
even though setting of LA screw has
been corrected, poor acceleration
Idle setting is too lean
N Turn the low speed screw (L)
counterclockwise, no further than
stop, until the engine runs and
accelerates smoothly.
Erratic idling behavior
Idle setting is too rich
N Turn the low speed screw (L)
clockwise, no further than stop, until
the engine runs and accelerates
smoothly.
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:
N Carry out the standard setting.
N Warm up the engine.
N Turn 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.
BR 350, BR 430
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