Stihl BR 350, BR 430 Instruction Manual

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STIHL BR 350, 430

Instruction Manual

Contents

English

Guide to Using this Manual 2 Safety Precautions and Working

Techniques 2 Assembling the Unit 7 Adjusting the Throttle Cable 11 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 16 Adjusting the Carburetor 17 Spark Plug 18 Engine Running Behavior 19 Storing the Machine 19 Maintenance and Care 20 Minimize Wear and Avoid Damage 22 Main Parts 23 Specifications 25 Maintenance and Repairs 26 Disposal 26

Printing inks contain vegetable oils, paper can be recycled.

EC Declaration of Conformity 27 UKCA Declaration of Conformity 27

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

0458-456-0121-E. VA0.H21.

0000004070_021_GB

BR 350, BR 430

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 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.

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 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 free dom of movement. Wear snug-fitting clothing, an overall and jacket combi nation, do not wear a work coat.

Avoid clothing with loose drawstrings, laces and ribbons, scarves, neck ties, jewelry or anything that could be sucked into the air intake in the side and bottom of the machine. Tie up and con fine 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-fit ting safety glasses in accordance with Euro pean Standard EN 166. Make sure the safety glasses are a comforta ble 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 350, BR 430

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.

BR 350, BR 430

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 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.

BR 350, BR 430

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

BR 350, BR 430

English

0000-GXX-2038-A0

0009BA003 KN

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

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 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

English

0000-GXX-2039-A0

0000-GXX-2040-A0

0009BA005 KN

0009BA006 KN

0009BA007 KN

452BA101 KN

452BA102 KN

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

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).

N Line up the control handle (1) with

the tube's seam – as shown.

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

N Assemble the blower tubes (5) and

nozzle (6).

the tube to the most comfortable position.

N Tighten down the screw in the

control handle (7).

N Secure the control handle (1) with

the screw (3) so that it can still be moved on the blower tube (2).

BR 350, BR 430

Mounting the blower tubes

452BA096 KN

452BA108 KN

452BA109 KN

452BA103 KN

452BA104 KN

452BA111 KN

English

N Depending on your height 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 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 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).

BR 350, BR 430

English

452BA112 KN

452BA110 KN

452BA100 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 control handle N Put the machine on your back and

adjust the harness – see "Fitting the Harness".

N Engage the throttle cable (4) with

sleeve (5) in the retainer (6).

Wear mark on nozzle

N Secure the hook and loop fastener

to the blower tube – pull the flap through the buckle.

N Secure the blower tube to the

handle on the backplate.

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).

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.

Fitting the transport aid

When storing or transporting the machine:

BR 350, BR 430

English

0009BA008 KN

373BA003 KN

373BA004 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 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.

Fitting the Harness

Adjusting the Harness

N Pull the straps downwards to tighten

the harness

Loosening the Harness

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

BR 350, BR 430

N Lift the tabs of the two sliding

adjusters.

N Adjust the harness so that the

backplate fits snugly and securely against your back

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.

English

0002BA086 KN

002BA447 KN

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)

10.02(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.

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.

N Position the machine so that the

filler cap faces up.

Opening screw-type tank cap

N Turn the cap counterclockwise until

it can be removed from the tank opening.

N Remove the cap.

BR 350, BR 430

English

002BA448 KN

0009BA009 KN

0009BA010 KN

452BA122 KN

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.

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.

Functions of setting lever

The power tool is equipped with different types of control handle.

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 again ready for operation.

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.

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 again ready for operation.

Lock position 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.

BR 350, BR 430

English

0009BA011 KN

0009BA021 KN

0009BA012 KN

0009BA013 KN

0009BA014 KN

0009BA028 KN

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 must be on F

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

Warm engine (warm start)

N Push the choke knob in and turn it to

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.

BR 350, BR 430

English

0009BA016 KN

0009BA022 KN

0009BA017 KN

0009BA018 KN

0009BA023 KN

As soon as the engine runs

N Operate the throttle trigger.

Stopping the Engine

N Move the setting lever in the

direction of † – the engine stops – the setting lever springs back to the on position.

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.

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.

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

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.

English

0002BA088 KN

0002BA089 KN

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

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

English

0002BA082 KN

0002BA083 KN

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.

BR 350, BR 430

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.

English

0002BA049 KN

000BA039 KN

000BA045 KN

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

N Pull off the spark plug boot (1)

vertically.

N Unscrew the spark plug (2).

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.

N Use resistor type spark plugs with a

properly tightened adapter nut.

Installing the spark plug

N Screw home the spark plug, fit the

boot and press it down firmly.

WARNING

Arcing may occur if the adapter nut (1) is loose or missing. Working in an easily combustible or explosive atmosphere may cause a fire or an explosion. This can result result in serious injuries or damage to property.

BR 350, BR 430

Engine Running Behavior Storing the Machine

English

If engine running behavior is unsatisfactory even though the air filter is clean and the carburetor is properly adjusted, the cause may be the muffler.

Have the muffler checked for contamination (carbonization) by your servicing dealer.

STIHL recommends that you have servicing and repair work carried out exclusively by an authorized STIHL servicing dealer.

For periods of 3 months or longer 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 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, high or

locked location, – out of the reach of children and other unauthorized persons.

BR 350, BR 430

English

Maintenance and Care

The following intervals apply to normal operating conditions only. If your daily work ing time is longer or operating conditions are difficult (very dusty work area, etc.), shorten the specified intervals accordingly.

Complete machine

Control handle Check operation XX

Air filter

Manual fuel pump

Pickup body in fuel tank

Fuel tank Clean X

Carburetor

Spark plug

Cooling inlet

All accessible screws and nuts (not adjust ing screws)

Anti-vibration elements

Visual inspection (condition, leaks) XX

Clean X

Replace X

Check X

Have repaired by servicing dealer

Have checked by servicing dealer

Have 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

Retighten X

Check XXX

Have replaced by servicing dealer

before starting work

after finishing work or daily

after each refueling stop

weekly

monthly

every 12 months

if problem

if damaged

as required

BR 350, BR 430

English

Blower air intake screen

Throttle cable Adjust X

Safety labels Replace X

STIHL recommends an authorized STIHL servicing dealer.

Check XX

Clean X

before starting work

after finishing work or daily

after each refueling stop

weekly

monthly

every 12 months

if problem

if damaged

as required

BR 350, BR 430

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

BR 350, BR 430

Main Parts

0009BA029 KN

BR 350

16 17

English

1 Straight nozzle 2 Curved nozzle 3 Blower tube 4 Blower tube 5 Control handle 6 Throttle trigger 7 Setting lever 8 Pleated hose 9 Back padding 10 Backplate 11 Harness 12 Carrying handle 13 Intake screen 14 Filter cover 15 Carburetor adjusting screws 16 Manual fuel pump 17 Choke knob 18 Starter grip 19 Tank cap 20 Fuel tank 21 Spark plug boot 22 Muffler # Serial number

BR 350, BR 430

Not in all versions, country-specific

English

BR 430

1 Straight nozzle 2 Curved nozzle 3 Blower tube 4 Blower tube

16 17

5 Control handle 6 Throttle trigger 7 Setting lever 8 Pleated hose 9 Back padding 10 Backplate 11 Harness 12 Carrying handle 13 Intake screen 14 Filter cover 15 Carburetor adjusting screws 16 Manual fuel pump 17 Choke knob 18 Starter grip 19 Tank cap 20 Fuel tank 21 Spark plug boot 22 Muffler # Serial number

0000-GXX-0002-A1 ST

Not in all versions, country-specific

BR 350, BR 430

English

Specifications

Engine

STIHL single cylinder two-stroke engine

Displacement: 63.3 cm Bore: 48 mm Stroke: 35 mm Idle speed: 3,000 rpm Engine power to

ISO 7293: BR 350: 2.1 kW (2.8 bhp) BR 430: 2.9 kW (3.9 bhp)

Ignition System

Electronic magneto ignition

Spark plug (resistor type): NGK BPMR 7 A

Electrode gap: 0.5 mm

Fuel System

All position diaphragm carburetor with integral fuel pump

Air flow rate: 740 m

/h Maximum air velocity 90 m/s Maximum air flow rate with

1150 m

out blower tube assembly:

BR 430

Blowing force 26 N Air velocity: 82 m/s

Air flow rate: 850 m

/h Maximum air velocity 98 m/s Maximum air flow rate with

1300 m

out blower tube assembly:

Weight

dry: BR 350: 10.1 kg BR 430: 10.3 kg

Noise and Vibration Data

Noise and vibration data are measured at idling and maximum rated speed in a ratio of 1:6.

For further details on compliance with Vibration Directive 2002/44/EC see www.stihl.com/vib/

Sound power level L

weq

DIN EN 15503:2010

BR 350: 106 dB(A) BR 430: 108 dB(A)

Vibration measurement a

hv,eq

DIN EN 15503:2010

Standard versions

Handle, right BR 350: 3.9 m/s BR 430: 2.5 m/s

Version with Bike Handle

Handle, left Handle, right BR 350: 2.5 m/s BR 430: 2.5 m/s

2.5 m/s

The K-factor in accordance with Directive 2006/42/EC is 2.0 dB(A) for the sound pressure level and sound power level; the K-factor in accordance with Directive 2006/42/EC is 2.0 m/s

for the vibration level.

REACH

Fuel tank capacity: 1700 cc (1.7 l)

Blowing performance

BR 350

Blowing force 17 N Air velocity: 75 m/s

BR 350, BR 430

Sound pressure level L

peq

DIN EN 15503:2010

BR 350: 98 dB(A) BR 430: 101 dB(A)

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.

English

000BA073 KN

Exhaust Emissions

The CO2value measured in the EU type approval procedure is specified at www.stihl.com/co2.

The measured CO

value was

determined on a representative engine in accordance with a standardized test procedure under laboratory conditions and does not represent either an explicit or implied guarantee of the performance of a specific engine.

The applicable exhaust emission requirements are fulfilled by the intended usage and maintenance described in this instruction manual. The type approval expires if the engine is modified in any way.

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.

BR 350, BR 430

English

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 350

BR 430

Serial identification number: 4244

Displacement: 63.3cm

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

BR 350: 105 dB(A) BR 430: 107 dB(A)

Guaranteed sound power level

BR 350: 107 dB(A) BR 430: 109 dB(A)

Technical documents deposited at:

ANDREAS STIHL AG & Co. KG Produktzulassung

The year of manufacture and serial number are applied to the product.

Done at Waiblingen, 15.07.2021

ANDREAS STIHL AG & Co. KG

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 350

BR 430

Serial identification number: 4244

Displacement: 63.3cm

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.

BR 350, BR 430

English

Measured sound power level

BR 350: 105 dB(A) BR 430: 107 dB(A)

Guaranteed sound power level

BR 350: 107 dB(A) BR 430: 109 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

Dr. Jürgen Hoffmann

Director Product Certification & Regulatory Affairs

BR 350, BR 430

0458-456-0121-E

englisch

www.stihl.com

*04584560121E*

0458-456-0121-E

Stihl BR 350, BR 430 Instruction Manual

Specifications and Main Features

Frequently Asked Questions

User Manual