{
STIHL BR 350, 430
Instruction Manual
Manual de instrucciones
WARNING
Read Instruction Manual thoroughly before use and follow all safety precautions – improper use can cause serious or fatal injury.
ADVERTENCIA
Antes de usar la máquina lea y siga todas las precauciones de seguridad dadas en el manual de instrucciones – el uso incorrecto puede causar lesiones graves o mortales.
Instruction Manual 1 - 36
Manual de instrucciones 37 - 76
English
Contents
Printing inks contain vegetable oils, paper can be recycled.
Printed on chlorine-free paper Original Instruction Manual
© ANDREAS STIHL AG & Co. KG, 2015 0458-456-8621-D. VA2.A15. 0000006506_004_GB
Guide to Using this Manual |
2 |
STIHL Incorporated Federal |
Safety Precautions and Working |
|
Emission Control Warranty |
Techniques |
2 |
Statement |
Assembling the Unit |
10 |
STIHL Incorporated California |
Adjusting the Throttle Cable |
13 |
Exhaust and Evaporative |
Fitting the Harness |
14 |
Emissions Control Warranty |
Statement |
||
Fuel |
14 |
Trademarks |
Fueling |
15 |
|
Information Before You Start |
16 |
|
Starting / Stopping the Engine |
17 |
|
Operating Instructions |
19 |
|
Replacing the Air Filter |
20 |
|
Engine Management |
20 |
|
Adjusting the Carburetor |
21 |
|
Spark Plug |
22 |
|
Engine Running Behavior |
23 |
|
Rewind Starter |
23 |
|
Storing the Machine |
23 |
|
Inspections and Maintenance by |
|
|
Dealer |
24 |
|
Maintenance and Care |
25 |
|
Main Parts |
27 |
|
Specifications |
29 |
|
Maintenance and Repairs |
30 |
|
Disposal |
31 |
|
Allowonlypersonswhofullyunderstand this manual to operate your blower.
31To receive maximum performance and satisfactionfromyourSTIHLblower,itis importantthatyouread,understandand
follow the safety precautions and the 33 operating and maintenance instructions
35in chapter "Safety Precautions and Working Techniques" before using your blower. For further information you can go to www.stihlusa.com.
Contactyour STIHLdealer or theSTIHL distributor for your area if you do not understandanyoftheinstructionsinthis manual.
WARNING
Because a blower is a high-speed tool, some special safety precautions must be observed as with any other power tool to reduce the risk of personal injury. Careless or improper use may cause serious or even fatal injury.
{This instruction manual is protected by copyright. All rights reserved, especially the rights to reproduce, translate and process with electronic systems.
BR 350, BR 430 |
1 |
English
Guide to Using this Manual
Pictograms
The meanings of the pictograms attached to or embossed on the machine are explained in this manual.
Dependingonthemodelconcerned,the following pictograms may be on your machine.
Fuel tank for gasoline and engine oil mixture
Press to operate manual fuel pump
Symbols in Text
Many operating and safety instructions are supported by illustrations.
The individual steps or procedures describedinthe manualmaybe marked in different ways:
N A bullet marks a step or procedure.
A description of a step or procedure that refers directly to an illustration may contain item numbers that appear in the illustration. Example:
N Loosen the screw (1). N Lever (2) ...
In addition to the operating instructions, this manual may contain paragraphs that require your special attention. Such
paragraphs are marked with the symbols and signal words described below:
DANGER
Indicates an imminent risk of severe or fatal injury.
WARNING
Indicates a hazardous situation which, if not avoided, could result in severe or fatal injury.
NOTICE
Indicates a risk of property damage, including damage to the machine or its individual components.
Engineering Improvements
STIHL’s philosophy is to continually improve all of its products. As a result, engineeringchangesandimprovements are made from time to time. Therefore, some changes, modifications and improvements may not be covered in this manual. If the operating characteristics or the appearance of your machine differs from those describedinthismanual,pleasecontact your STIHL dealer or the STIHL distributor for your area for assistance.
Safety Precautions and
Working Techniques
Because a blower is gasoline-powered and produces a strong air blast, special safety pre-
cautions must be observed to reduce the risk of personal injury.
It is important that you read, fully understand and observe the following safety precautions and warnings. Read the instruction manual and the safety precautions periodically. Careless or improper use may cause serious or fatal injury.
Have your STIHL dealer show you how to operate your power tool. Observe all applicable local safety regulations, standards and ordinances.
WARNING
Do not lend or rent your power tool without the instruction manual. Be sure that anyone using it understands the information contained in this manual.
WARNING
The use of this machine may be hazardous.
Useyourbloweronlyforclearingleaves, grass,paperanddustinyards,gardens, sport stadiums, parks, driveways and parking lots.
2 |
BR 350, BR 430 |
WARNING
Do not use it for other purposes, since misuse may result in personal injury or property damage, including damage to the machine.
WARNING
Minors should never be allowed to use this power tool. Bystanders, especially children, and animals should not be allowed in the area where it is in use.
WARNING
Toreducetheriskofinjurytobystanders and damage to property, never let your power tool run unattended. When it is not in use (e.g. during a work break), shut it off and make sure that unauthorized persons do not use it.
Most of these safety precautions and warnings apply to the use of all STIHL blowers. Different models may have different parts and controls. See the appropriate section of your instruction manual for a description of the controls and the function of the parts of your model.
Do not clean your machine with a pressure washer. The solid jet of water may damage parts of the machine.
Safe use of a blower involves
1.the operator
2.the power tool
3.the use of the power tool.
THE OPERATOR
Physical Condition
You must be in good physical condition and mental health and not under the influence of any substance (drugs, alcohol, etc.) which might impair vision, dexterity or judgment. Do not operate this machine when you are fatigued.
WARNING
Be alert – if you get tired, take a break. Tiredness may result in loss of control. Working with any power tool can be strenuous.Ifyouhaveanyconditionthat mightbeaggravatedbystrenuouswork, check with your doctor before operating this machine.
WARNING
Prolonged use of a power tool (or other machines) exposing the operator to vibrations may produce white finger disease (Raynaud's phenomenon) or carpal tunnel syndrome.
These conditions reduce the hand's ability to feel and regulate temperature, produce numbness and burning sensations and may cause nerve and circulation damage and tissue necrosis.
All factors which contribute to white finger disease are not known, but cold weather, smoking and diseases or physical conditions that affect blood vessels and blood transport, as well as high vibration levels and long periods of exposure to vibration are mentioned as
English
factors in the development of white finger disease. In order to reduce the risk of white finger disease and carpal tunnel syndrome, please note the following:
–Most STIHL power tools are available with an anti-vibration ("AV") system designed to reduce the transmission of vibrations created by the machine to the operator's hands. An AV system is recommended for those persons using power tools on a regular or sustained basis.
–Keep your hands warm.
–Keep the AV system well maintained. A power tool with loose components or with damaged or worn AV elements will tend to have higher vibration levels.
–Maintain a firm grip at all times, but do not squeeze the handle with constant, excessive pressure. Take frequent breaks.
All the above-mentioned precautions do not guarantee that you will not sustain white finger disease or carpal tunnel syndrome. Therefore, continual and regular users should closely monitor the condition of their hands and fingers. If any of the above symptoms appear, seek medical advice immediately.
WARNING
The ignition system of the STIHL unit produces an electromagnetic field of a very low intensity. This field may interfere with some pacemakers. To reduce the risk of serious or fatal injury, persons with a pacemaker should
BR 350, BR 430 |
3 |
English
consult their physician and the pacemaker manufacturer before operating this tool.
Proper Clothing
WARNING
To reduce the risk of injury, the operator should wear proper protective apparel.
WARNING
To reduce the risk of injury to your eyes never
operate your power tool unless wearing goggles or properly fitted protec- tive glasses with adequate top and side protection complying with ANSI Z87 "+" (or your applicable national standard).
Power tool noise may damage your hearing. Wear sound barriers (ear plugs or ear mufflers) to protect your hearing. Continual and regular users should have their hearing checked regularly.
Be particularly alert and cautious when wearing hearing protection because your ability to hear warnings (shouts, alarms, etc.) is restricted.
Clothing must be sturdy and snug-fitting, but allow complete freedom of movement.
4
Avoid loose-fitting jack- ets, scarfs, neckties,
jewelry, flared or cuffed
pants, unconfined long hair or anything that could become drawn into the air intake. Secure hair so it is above shoulder level.
Good footing is very important. Wear sturdy boots with nonslip soles.
Steel-toed safety boots are recommended.
WARNING
To reduce the risk of injury when the inhalation of dust cannot be substantially controlled use an appropriate respirator for the material being blown. For more information see the "Working conditions" section of these Safety Precautions.
THE POWER TOOL
For illustrations and definitions of the power tool parts see the chapter on "Main Parts."
WARNING
Nevermodifythispowertoolinanyway. Only attachments supplied by STIHL or expressly approved by STIHL for use with the specific STIHL model are authorized. Although certain unauthorized attachments are useable with STIHL power tools, their use may, in fact, be extremely dangerous.
If this 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.Checkin particularthat the fuel system is tight (no leaks) and that the controls and safety devices are working properly. Do not continue operating this machine if it is damaged. Incaseofdoubt,haveitcheckedbyyour STIHL servicing dealer.
WARNING
Smallparticles(e.g.dust)blownthrough the blower tubes and nozzle can cause a static charging of the blower tubes.
This is especially true in low humidity and high dust conditions. In order to reduce the risk of shock from static charging and subsequent injury from loss of control, your blower has features designed to help reduce the build up of static electricity in the blower tubes and equalize the charge with the engine and/or operator:
The control handle is designed to conduct static electricity through the throttle cable to the engine and from the handle through the operator to the ground.
STIHL offers an optional kit for use in especiallydryand dustyconditions.The kit contains: (1) blower tubes made with graphitetohelpconductthechargeback to the control handle, and (2) a metal ring with "wire" for insertion in the end tube that helps reduce the build up of static electricity.
Ifyourblowerisproperlyassembledand you are still experiencing static shocks, make sure that your footwear has conductive soles and try operating your
BR 350, BR 430
unit without gloves, which may be interfering with the conduction of the charge.
THE USE OF THE POWER TOOL
Transporting the Power Tool
WARNING
Always switch off the engine before taking the machine off your back and puttingitdown.Whentransportingitin a vehicle, properly secure it to prevent turnover, fuel spillage and damage to the unit.
Fuel
Your STIHL power tool uses an oilgasoline mixture for fuel (see the chapter on "Fuel" of your instruction manual).
WARNING
Gasoline is an extremely flammable fuel. If spilled and ignited by a spark or other ignition source, it can cause fire and seri-
ous burn injury or property damage. Use extreme caution when handling gasoline or fuel mix. Do not smoke or bring any fire or flame near the fuel or the power tool. Note that combusti- ble fuel vapor may escape from the fuel system.
Fueling Instructions
WARNING
To reduce the risk of serious injury from burns, never attempt to refuel the unit until it has been completely removed from the operator.
WARNING
Fuel your power tool in well-ventilated areas, outdoors. Always shut off the engine and allow it to cool before refueling. Gasoline vapor pressure may build up inside the fuel tank depending on the fuel used, the weather conditions and the tank venting system.
In order to reduce the risk of burns and other personal injury from escaping gas vapor and fumes, remove the fuel filler caponyourpowertoolcarefullysoasto allow any pressure build-up in the tank to releaseslowly.Neverremove thefuel filler cap while the engine is running.
Selectbare groundforfuelingandmove at least 10 feet (3 m) from the fueling spot before starting the engine. Wipe off any spilled fuel before starting your machine.
English
WARNING
Check for fuel leakage while refueling and during operation. If fuel leakage is found, do not start or run the engine until the leak is fixed and any spilled fuel has been wiped away. Take care not to get fuel on your clothing. If this happens, change your clothing immediately.
WARNING
Inordertoreducetheriskoffuelspillage and fire from an improperly tightened fuel cap, correctly position and tighten the fuel cap in the fuel tank opening.
Different models may be equipped with different fuel caps.
See also the "Fueling" chapter in your Instruction Manual for additional information.
Bayonet Fuel Filler Cap
Never use a tool to open or close the bayonet fuel filler cap, as this could damage the cap and cause fuel to leak out.
BR 350, BR 430 |
5 |
English
The bayonet fuel filler cap must be closed with care after refuelling.
Screw Cap
WARNING
Unit vibrations can cause an improperly tightened fuel filler cap to loosen or
come off and spill quanti- ties of fuel. In order to reduce the risk of fuel spillage and fire, tighten the fuel filler cap by hand as securely as possible.
Before Starting
WARNING
Alwayscheckyour powertoolforproper condition and operation before starting, particularly the throttle trigger, setting lever and momentary stop switch. The throttle trigger must move freely and always spring back to the idle position. Never attempt to modify the controls or safety devices.
WARNING
Check fuel system for leaks, especially the visible parts, e.g., filler cap, hose connections,manual fuelpump (onlyfor powertoolsequippedwithamanualfuel pump). Do not start the engine if there are leaks or damage – risk of fire! Have the machine repaired by a servicing dealer before using it.
6
WARNING
Never operate your power tool if it is damaged, improperly adjusted or maintained, or not completely or securely assembled.
WARNING
Check that the spark plug boot is securely mounted on the spark plug – a loose boot may cause arcing that could ignite combustible fumes and cause a fire.
Keep the handles clean and dry at all times; it is particularly important to keep themfreeofmoisture,pitch,oil,fuelmix, grease or resin in order for you to maintain a firm grip and properly control your power tool.
WARNING
To reduce the risk of injury from parts thrown by the fan wheel, check the fan housing for damage (cracks or holes that could allow foreign objects to contact the fan wheel). If any such damageisfound,stopusingtheunitand contact your STIHL dealer for repair.
WARNING
Adjust carrying harness to suit your size before starting work.
Inanemergency,youmayslipoutofthe harness and throw off the machine quickly.Tryslipping outoftheharnessa number of times before using the machine in order to become accustomed to it. Do not throw off the machine while practicing as it could damage the machine.
Starting
To reduce the risk of fire and burn injuries, start the engine at least 10 feet (3 m) from the fueling spot, outdoors only.
WARNING
Your power tool is a one-person machine. To reduce the risk of eye or other injury from thrown objects, insure that bystanders are at least 50 feet (15 m) away during use. Stop operation immediately if you are approached.
WARNING
This unit is equipped with an ignition system that is normally in operational readiness.Afterthe settinglever isused to stop the engine, it automatically springs back to the "on" position. If the engine is warm, it may be possible to start it by simply pulling the starter rope, with no further adjustments. To reduce the risk of injury, be particularly alert to keep children away from the unit.
Forspecificstartinginstructions,seethe appropriate section of your manual. Place the power tool on firm ground or other solid surface in an open area. Maintain good balance and secure footing.
BR 350, BR 430
WARNING
When you pull the starter grip, do not wrap the starter rope around your hand. Do not let the grip snap back, but guide the starter rope to rewind it properly. Failure to follow this procedure may result in injury to your hand or fingers and may damage the starter mechanism.
Once the engine has started, immediately blip the throttle trigger, which should cause the choke knob to move to the run position and allow the engine to slow down to idle.
During Operation
Holding and Controlling the Power Tool
0009BA001 KN
The blower is designed for singlehanded operation with the right hand on the control handle. It should be carried as a backpack with the straps of the harness over both shoulders.
Watch out for small animals when using thebloweronopenground,inyardsand gardens.
WARNING
To reduce the risk of loss of control, never carry the unit with the strap(s) over one shoulder.
BR 350, BR 430
Wrap your fingers tightly around the handle, keeping the control handle cradled between your thumb and forefinger. Keep your hand in this position to have your machine under control at all times.
WARNING
Special care must be taken in slippery conditions (wet ground) and in difficult, overgrown terrain. Watch for hidden obstacles such as tree stumps, roots, rocks, holes and ditches to avoid stumbling.Forbetterfooting,clearaway fallen branches, scrub and cuttings. Be extremely cautious when working on slopes or uneven ground.
To reduce the risk of stumbling and loss of control, do not walk backward while operating the machine.
WARNING
To reduce the risk of injury from loss of control,neverworkonaladderoronany other insecure support.
Working Conditions
To minimize blowing time, use a rake andbroomtoloosendirtparticlesbefore you start blowing.
Save water by using a blower instead of a water hose for lawn and garden work wherever possible, e.g. for cleaning yards and patios.
Recommended working technique to minimize air pollution:
–Ifconditionsareverydusty,dampen surfaces slightly before blowing.
–Pull out the nozzle to full length so that the airstream is at ground level.
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–Donotblowparticlesinthedirection 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 rubbishbins–donotblowitontothe 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. Normal recommendation for professional use on weekdays: 9:00hrs to 12:00hrs and 15:00hrs to 17:00hrs. Be considerate of neighbors at weekends.
–Fewer engines mean less noise. Where possible, do not run more than one power tool at any time.
–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.
Operate and start your power tool only outdoors in a well-ventilated area. Operate it under good visibility and daylight conditions only. Work carefully.
7
English
WARNING
As soon as the engine is running, this product gen- erates toxic exhaust
fumes containing chemi- cals, such as unburned hydrocarbons (including benzene) and carbon monoxide, that are known to cause respira- tory problems, cancer, birth defects, or other reproductive harm. Some of the gases (e.g. carbon monoxide) may be color- less and odorless. To reduce the risk of serious or fatal injury/illness from inhaling toxic fumes, never run the machine indoors or in poorly venti- lated locations. If exhaust fumes become concen- trated due to insufficient ventilation, clear obstruc- tions from work area to permit proper ventilation before proceeding and/or take frequent breaks to allow fumes to dissipate before they become concentrated.
WARNING
Inhalation of certain dusts, especially organic dusts such as mold or pollen, can cause susceptible persons to have an allergic or asthmatic reaction.
Substantial or repeated inhalation of dustandotherairbornecontaminants,in particular those with a smaller particle size, may cause respiratory or other
8
illnesses. This includes wood dust, especially from hardwoods, but also from some softwoods such as Western Red Cedar. Control dust at the source where possible. Use good work practices, such as operating the unit so that the wind or operating process directsanydustraisedbythepowertool away from the operator. Follow the recommendations of EPA/OSHA/NIOSH and occupational and trade associations with respect to dust ("particulate matter"). When the inhalation of dust cannot be substantially controlled, i.e., kept at or neartheambient(background)level,the operator and any bystanders should wear a respirator approved by NIOSH/MSHA for the type of dust encountered.
WARNING
If the substance being blown is a commercial substance, review the material safety data sheet for that substance and / or consult the material manufacturer / supplier. The state of California and some other authorities, for instance, have published lists of substances known to cause cancer, reproductive toxicity, etc.
WARNING
Breathing asbestos dust is dangerous and can cause severe or fatal illness, respiratory illness or cancer. The use and disposal of asbestos-containing products have been strictly regulated by OSHAandtheEnvironmentalProtection Agency. If you have any reason to believe that you might be blowing or
otherwise disturbing asbestos, immediately contact your employer or a local OSHA representative.
WARNING
Dust with silica in its composition may containcrystallinesilica.Silicaisabasic component of sand, quartz, brick, clay, granite and numerous other minerals and rocks, including masonry and concrete products. Repeated and / or substantial inhalation of airborne crystalline silica can cause serious or fatal respiratory disease, including silicosis. In addition, the state of California and some other authorities havelistedrespirablecrystallinesilicaas a substance known to cause cancer. When encountering such materials, always follow the respiratory precautions mentioned above.
Operating Instructions
WARNING
In the event of an emergency, switch off the engine immediately – move the setting lever to 0 or STOP.
WARNING
Even though bystanders should be kept awayfromtherunningpowertool,never work alone. Keep within calling distance of others in case help is needed.
Stop the engine immediately if you are approached.
BR 350, BR 430
WARNING
To reduce the risk of personal injury, do not direct air blast towards bystanders, since the high pressure of the air flow can injure eyes and can blow small objects at great speed.
WARNING
The blower fan between the air intake and output openings rotates whenever the engine is running.
Never insert any foreign object into the air intake of the machine or into the nozzle of the blower. It will damage the fan wheel and may cause serious injury to the operator or bystanders as a result of the object or broken parts being thrown out at high speed.
Do not place the blower on the ground when operating at high speed, because small objects such as sand, grass, dust, etc.maybepulledintotheairintakeand damage the fan wheel. It is best to turn the machine off when putting it on the ground.
WARNING
Themufflerandotherpartsoftheengine (e.g. fins of the cylinder, spark plug) becomehotduringoperationandremain hot for a while after stopping the engine. To reduce risk of burns do not touch the muffler and other parts while they are hot.
WARNING
Toreducetheriskoffireandburninjury, keep the area around the muffler clean. Remove excess lubricant and all debris
BR 350, BR 430
such as pine needles, branches or leaves. Let the engine cool down sitting on concrete, metal, bare ground or solid wood (e.g. the trunk of a felled tree) away from any combustible substances.
WARNING
Never modify your muffler. The muffler could be damaged and cause an increase in heat radiation or sparks, thereby increasing the risk of fire and burn injury. You may also permanently damage the engine. Have your muffler serviced and repaired by your STIHL servicing dealer only.
MAINTENANCE, REPAIR AND STORING
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.
WARNING
Use only identical STIHL replacement partsformaintenanceandrepair.Useof non-STIHL parts may cause serious or fatal injury.
Strictly follow the maintenance and repair instructions in the appropriate section in this instruction manual.
Please refer to the maintenance chart in this instruction manual.
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WARNING
Always stop the engine and make sure that the fan is stopped before doing any maintenance or repair work or cleaning the power tool. Do not attempt any maintenance or repair work not described in this instruction manual. Have such work performed by your STIHL servicing dealer only.
Do not clean your machine with a pressure washer. The solid jet of water may damage parts of the machine.
WARNING
Use the specified spark plug and make sure it and the ignition lead are always clean and in good condition. Always press spark plug boot snugly onto spark plugterminalofthepropersize.(Note:If terminal has detachable SAE adapter nut, it must be securely attached.) A loose connection between spark plug terminal and the ignition wire connector in the boot may create arcing that could ignite combustible fumes and cause a fire.
WARNING
Never test the ignition system with the boot removed from the spark plug or with a removed spark plug, since uncontained sparking may cause a fire.
WARNING
Do not operate your power tool if the mufflerisdamaged,missingormodified. An improperly maintained muffler will increasetheriskoffireandhearingloss. Your muffler is equipped with a sparkarresting screen to reduce the risk of
9
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fire; never operate your power tool if the screen is missing, damaged or clogged. Remember that the risk of a brush or forest fire is greater in hot or dry weather.
In California, it is a violation of § 4442 or § 4443 of the Public Resources Code to use or operate gasoline-powered tools on forest-covered, brush-covered or grass-covered land unless the engine’s exhaust system is equipped with a complying spark arrester that is maintained in effective working order. The owner/operator of this product is responsible for properly maintaining the spark arrester. Other states or governmentalentities/agencies,suchas the U.S. Forest Service, may have similar requirements. Contact your local fire agency or forest service for the laws or regulations relating to fire protection requirements.
Tightenallnuts,boltsandscrewsexcept the carburetor adjustment screws after each use.
Formaintenanceitemspleasealsorefer to the maintenance chart in this instruction manual.
Store the power tool in a dry and high or locked location out of reach of children.
Before storing for longer than a few days, always empty the fuel tank. See chapter "Storing the machine" in this instruction manual.
Store fuel in an approved and properly labeled safety-type canister only. Take carewhenhandlinggasoline!Forhealth and safety reasons, avoid direct contact with the skin and avoid inhaling fuel vapor!
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
1 |
2 |
0009BA002 KN
NEasetheslipring (2)apartandpush it over the elbow (1).
|
|
KN |
3 |
4 |
0009BA003 |
|
NOpenthehoseclamp (3)andfititon the pleated hose (4).
NClose the hose clamp (3) – engage tab in recess.
2 3
4
0009BA004 KN
NPush the pleated hose (4) over the slip ring (2) as far as stop.
NPosition the hose clamp (3) as shown in the illustration.
0009BA027 KN
N Tighten down the screw (arrow). Mounting the blower tubes and nozzle
5 |
5 |
6 |
|
|
0009BA005 KN |
NAssemble the blower tubes (5) and nozzle (6).
10 |
BR 350, BR 430 |
Mounting the control handle
3 |
|
|
7 |
KN |
|
0009BA006 |
||
|
NPull the ends of the clamp on the control handle (7) apart and push it over stub of pleated hose (4).
NAttach throttle cable to retainer on the hose clamp (3).
Adjusting the control handle
NPut the machine on your back and adjustthe harness –see "Fitting the Harness".
7 |
5 |
KN |
|
0009BA007 |
|||
|
|
NPush the blower tube (5) into the stub of pleated hose (4) as far as the stop.
NMove the control handle (7) along the tube to the most comfortable position.
NTighten down the screw in the control handle (7).
BR 430 Blower Tube
Mounting the control handle
2 |
1 |
KN |
|
452BA101 |
|||
|
|||
|
|
NPull the two halves of the clamp apart.
NPushthecontrolhandle (1)ontothe blower tube (2).
1 |
2 |
KN |
|
452BA102 |
|
3 |
|
NLine up the control handle (1) with the tube's seam – as shown.
NSecure the control handle (1) with the screw (3) so that it can still be moved on the blower tube (2).
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Mounting the blower tubes
|
|
1 |
|
2 |
3 |
KN |
|
452BA096 |
|||
|
|
NDepending on your size and reach: Push blower tube (1) up to the appropriate mark on the blower tube (2).
NRotate 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
3 |
1 |
2 |
|
|
452BA108 KN |
NPush the hose clamp (1) (with retainer for throttle cable) onto the elbow (3) – the positioning marks must face to the left.
NPush the pleated hose (2) over the elbow (3).
BR 350, BR 430 |
11 |
English |
|
|
3 |
1 |
2 |
|
||
4 |
|
452BA109 KN |
NPush the hose clamp (1) onto the pleated hose (2).
NLineupthepositioningmarksonthe hose clamp (1) and elbow (3) – the screw recess facing down.
NSecure the hose clamp (1) with the screw (4).
2 |
5 |
|
6 |
|
452BA103 KN |
NPush the hose clamp (5) (without retainer for throttle cable) onto the elbow (6) – the positioning marks must face to the right.
NPush the blower tube (6) into the pleated hose (2).
2 |
5 |
|
|
|
6 |
|
7 |
KN |
|
452BA104 |
|
|
|
NPush the hose clamp (5) onto the pleated hose (2).
NLine up the hose clamp (5) and blower tube (6) – as shown.
NSecure the hose clamp (5) with the screw (7).
Mounting the nozzle
|
3 |
2 |
1 |
|
452BA111 KN |
NPush the nozzle (1) onto the blower tube (2) and engage it on the lugs (3).
Removing the nozzle
2 |
3 |
1 |
|
KN |
|
|
|
452BA112 |
NRotatethenozzle (1)inthedirection of the arrow until the lugs (3) are covered.
NPull the nozzle (1) off the blower tube (2).
Adjusting the control handle
NPut the machine on your back and adjust the harness– see "Fitting the Harness".
1 |
2 |
KN |
3 |
|
452BA110 |
NMove the control handle (1) along the blower tube (2) to the most comfortable position.
NSecure the control handle (1) with the screw (3).
12 |
BR 350, BR 430 |
NEngage the throttle cable (4) with sleeve (5) in the retainer (6).
Wear mark on nozzle
452BA100 KN
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:
NSecurethevelcrostriptotheblower tube – pull the flap through the buckle.
NSecure the blower tube to the handle on the backplate.
English
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.
0009BA008 KN
NSet throttle trigger to the full throttle position – as far as stop.
NCarefully rotate the screw in the throttle trigger in the direction of the arrowuntilyoufeelinitialresistance. Then rotate it another full turn.
BR 350, BR 430 |
13 |
English
Fitting the Harness
Adjusting the Harness
373BA003 KN
NPull the ends of the straps downwards to tighten the harness.
Loosening the Harness
373BA004 KN
N Lift the tabs of the sliding adjusters.
NAdjust the harness so that the backplate fits snugly and securely against your back.
14
Fuel
This engine is certified to operate on unleaded gasoline and the STIHL twostroke engine oil at a mix ratio of 50:1.
Your engine requires a mixture of highquality gasoline and two-stroke air cooled engine oil.
Usemid-gradeunleadedgasolinewitha minimum octane rating of 89 ((R+M)/2) and no more than 10% ethanol content.
Fuel with a lower octane rating may increase engine temperatures. This, in turn, increases the risk of 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.),butmagnesiumcastingsand catalytic converters as well. This could cause running problems or even damage the engine. For this reason STIHL recommends that you use only high-quality unleaded gasoline!
Gasoline with an ethanol content of more than 10% can cause running problems and major damage in engines and should not be used.
The ethanol content in gasoline affects engine running speed – it may be necessary to readjust the carburetor if you use fuels with various ethanol contents.
WARNING
To reduce the risk of personal injury from loss of control and/or contact with the running cutting tool, do not use your
unit with incorrect idle adjustment. At correct idle speed, the cutting tool should not move.
Ifyourpowertoolshowsanincorrectidle adjustment, have your STIHL dealer check your power tool and make proper adjustments and repairs.
The idle speed and maximum speed of the engine change if you switch from a fuel with a certain ethanol content to another fuel with a much higher or lower ethanol content.
This problem can be avoided by always using fuel with the same ethanol content.
Use only STIHL two-stroke engine oil or equivalent high-quality two-stroke engine oils that are designed for use only in air cooled two-cycle engines.
WerecommendSTIHLHPUltra2-Cycle Engine Oil since it is specially formulated for use in STIHL engines.
Do not use BIA or TCW rated (twostroke water cooled) mix oils or other mixoilsthatstatetheyareforuseinboth water cooled and air cooled engines (e.g., outboard motors, snowmobiles, chain saws, mopeds, etc.).
WARNING
Take care when handling gasoline. Avoid direct contact with the skin and avoid inhaling fuel vapor. When filling at the pump, first remove the container from your vehicle and place the containeronthegroundbeforefilling.To reduce the risk of sparks from static discharge and resulting fire and/or explosion, do not fill fuel containers that are sitting in or on a vehicle or trailer.
BR 350, BR 430
The container should be kept tightly closed in order to limit the amount of moisture that gets into the mixture.
The machine‘s fuel tank should be cleaned as necessary.
Fuel mix ages
Only mix sufficient fuel for a few days work, not to exceed 30 days of storage. Store in approved fuel-containers only. When mixing, pour oil into the container first, and then add gasoline. Close the container and shake it vigorously by hand to ensure proper mixing of the oil with the fuel.
Gaso- |
Oil (STIHL 50:1 or equiva- |
line |
lent high-quality oils) |
US gal. |
US fl.oz. |
12.6
2 1/2 |
6.4 |
512.8
Dispose of empty mixing-oil containers only at authorized disposal locations.
Fueling
Preparations |
0002BA086 KN |
NBefore fueling, clean the fuel filler cap and the area around it so that dirt cannot fall into the tank.
Thoroughly shake up the mixture in the canister before fueling your machine.
WARNING
In order to reduce the risk of fire and personalinjuryfromescapinggasvapor and fumes, remove the fuel filler cap carefully so as to allow any pressure build-up in the tank to release slowly.
Do not spill any fuel and do not fill the tank up to the brim.
Your power tool comes standard with either a screw-type or bayonet-type fuel cap.
English
0002BA091 KN
Bayonet fuel cap
0002BA092 KN
Screw-type tank cap
Open the bayonet fuel filler cap
WARNING
Never use a tool to open the bayonet catch. This could damage the cap and cause fuel to leak out.
BR 350, BR 430 |
15 |
English
1.
2.
0002BA014 KN
NPress the cap down with your hand as far as possible, turn it counterclockwise (approx. 1/8 turn) and remove it.
Fueling
Take care not to spill fuel while fueling and do not overfill the tank.
Close the bayonet fuel filler cap
1.
2.
0002BA015 KN
NFit the cap and turn it until it engages in the bayonet mount.
NPress the cap down with your hand as far as possible and turn it clockwise (approx. 1/8 turn) until it engages completely.
Opening the threaded filler cap
002BA447 KN |
NTurn the cap counterclockwise until it can be removed from the tank opening.
N Remove the filler cap.
Refueling
Take care not to spill fuel while fueling and do not overfill the tank.
Closing the threaded filler cap
002BA448 KN |
N Position cap.
NTurn the cap clockwise as far as it will go and tighten it as securely 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
1 
2 |
KN |
|
0009BA009 |
||
|
Run position F
Engine runs or is ready to start. Throttle trigger (2)canbemovedtoanyposition.
Switch off engine †
Ignitionisinterrupted,enginestops.The setting lever (1) is not locked in this position. It springs back to the run position F. The ignition is switched on again.
16 |
BR 350, BR 430 |
Fixed throttle
1
2 |
KN |
|
0009BA010 |
||
|
The throttle trigger (2) can be locked in any position:
To disengage the lock:
NReturn the setting lever (1) to the run position F.
Positions of setting lever – BR 430
1 
2 |
KN |
|
452BA122 |
Run position F
Engine runs or is ready to start. Throttle trigger (2)canbemovedtoanyposition.
Switch off engine †
Ignitionisinterrupted,enginestops.The setting lever (1) is not locked in this position. It springs back to the run position F. The ignition is switched on again.
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.
English
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
0009BA011 KN
BR 430
0009BA021 KN
N The setting lever must be on F
BR 350, BR 430 |
17 |
English
L
H
LA
0009BA012 KN
NPress the fuel pump bulb at least eighttimes–evenifthe bulbisfilled with fuel.
Cold engine (cold start)
0009BA013 KN
NPushthechokeknobinandturnitto c.
Warm engine (warm start)
0009BA014 KN
NPushthechokeknobinandturnitto o.
Also use this setting if the engine has been running but is still cold.
Cranking |
0009BA028 KN |
NPlace the unit securely on the ground and make sure that bystanders are well clear of the nozzle outlet.
NMake sure you have a firm footing: Hold the unit with your left hand on thehousingandputonefootagainst the base plate to prevent it slipping.
NPull the starter grip slowly with your right hand until you feel it engage and then give it a brisk strong pull. Donotpulloutthestarterropetofull length – it might otherwise break.
NDonotletthestartergripsnapback. Guideitslowlybackintothehousing so that the starter rope can rewind properly.
NContinue cranking until the engine runs.
As soon as the engine runs
BR 350
0009BA016 KN
BR 430
0009BA022 KN
N Operate the throttle trigger.
0009BA017 KN
NChokeknobautomaticallyreturnsto therunpositionewhenthethrottle trigger is operated.
At very low outside temperatures
NOpen throttle slightly – warm up the engine for a short period.
18 |
BR 350, BR 430 |
Stopping the Engine
BR 350
0009BA018 KN
BR 430
0009BA023 KN
NMove the setting lever in the direction of †– the engine stops – the setting lever springs back to the on position.
Other Hints on Starting
Engine stalls in cold start position cor under acceleration
NMove the choke knob to oand continue cranking until the engine runs.
Engine does not start in warm start position o
NMove the choke knob to cand continue cranking until the engine runs.
If the engine does not start
N Check that all settings are correct.
NCheck that there is fuel in the tank and refuel if necessary.
NCheck that the spark plug boot is properly connected.
N Repeat the starting procedure. Fuel tank run until completely dry
NAfter refueling, press the manual fuel pump bulb at least five times – even if the bulb is filled with fuel.
NSet the choke knob according to engine temperature.
N Start the engine.
English
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 inadryplace,wellawayfromsourcesof ignition, until you need it again. For longer out-of-service periods – see "Storing the Machine".
BR 350, BR 430 |
19 |
English
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
1 |
|
2 |
KN |
|
|
1 |
0002BA088 |
|
N Turn the choke knob to c . N Loosen the screws (1).
N Remove the filter cover (2).
3
0002BA089 KN |
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.
NFit the screws and tighten them down firmly.
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.
20 |
BR 350, BR 430 |
|
|
Standard Setting |
Adjusting the Carburetor |
|
|
|
|
|
|
|
|
General Information
The carburetor comes from the factory with a standard setting.
Thissettingprovidesanoptimumfuel-air mixture under most operating conditions.
Preparations
N Shut off the engine.
NCheck the air filter and clean or replace if necessary.
NCheck that the throttle cable is properly adjusted – readjust if necessary – see chapter on "Adjusting the Throttle Cable".
NCheck the spark arresting screen (not in all models, country-specific) in the muffler and clean or replace if necessary.
L
H
0002BA082 KN
NTurn high speed screw (H) counterclockwise as far as stop (no more than 3/4 turn).
NTurn the low speed screw (L) clockwise as far as stop, then turn it back 3/4 turn.
Adjusting Idle Speed
N Carry out the standard setting. N Start and warm up the engine.
L
LA
0002BA083 KN
Engine stops while idling
NTurn the idle speed screw (LA) slowly clockwise until the engine runs smoothly.
English
Erratic idling behavior, engine stops even though setting of LA screw has been corrected, poor acceleration
Idle setting is too lean
NTurn 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
NTurn the low speed screw (L) clockwise,nofurtherthanstop,until the engine runs and accelerates smoothly.
It is usually necessary to change the settingoftheidlespeedscrew (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.
NTurn high speed screw (H) slightly clockwise (leaner) – no further than stop.
NOTICE
After returning from high altitude, reset the carburetor to the standard setting.
If the setting is too lean there is a risk of engine damage due to insufficient lubrication and overheating.
BR 350, BR 430 |
21 |
English
Spark Plug
If engine is down on power, difficult to start or runs poorly at idling speed, first check the spark plug.
Fit a new spark plug after approx. 100 operating hours or earlier if the electrodes are badly eroded.
Wrong fuel mix (too much engine oil in the gasoline), a dirty air filter and unfavorable running conditions (mostly at part throttle etc.) affect the condition of the spark plug. These factors cause deposits to form on the insulator nose which may result in trouble in operation.
Removing the spark plug
2 |
KN |
|
0002BA049 |
NPull off the spark plug boot (1) vertically.
N Unscrew the spark plug (2).
Checking the Spark Plug
|
KN |
A |
000BA039 |
|
N Clean dirty spark plug.
NCheck electrode gap (A) and readjust if necessary – see chapter "Specifications."
NUseonlyresistortypesparkplugsof the approved range.
Rectify problems which have caused fouling of spark plug:
–too much oil in fuel mix,
–dirty air filter,
–unfavorablerunningconditions,e.g. operating at part load.
2
002BA363 KN
WARNING
Toreducetheriskoffireandburninjury, use only spark plugs authorized by STIHL.Alwayspresssparkplugboot(1) snuglyontosparkplugterminal(2)ofthe proper size. (Note: If terminal has detachable SAE adapter nut, it must be securely attached.) A loose connection between spark plug boot and ignition wire connector in the boot may create arcing that could ignite combustible fumes and cause a fire.
Installing the spark plug
NScrew home the spark plug, fit the boot and press it down firmly.
22 |
BR 350, BR 430 |
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