Instruction Manual
Page 2
...Spark Plug 22 Spark Arresting Screen in this Manual. !Warning! To receive maximum performance and satisfaction from your blower. © ANDREAS STIHL AG & Co. KG, 2005 0458 373 3021 B. L5. As a result, engineering changes and improvements are made from those ... 24 Storing the Machine 27 Maintenance Chart 28 Parts and Controls 29 Specifications 31 Special Accessories 32 Maintenance and Repairs 32 STIHL Incorporated Federal and California Emission Control Warranty Statement 33 Trademarks 35 STIHl BR 340, BR 340 L, BR 420, BR 420 C English / USA Allow only persons who...
...Spark Plug 22 Spark Arresting Screen in this Manual. !Warning! To receive maximum performance and satisfaction from your blower. © ANDREAS STIHL AG & Co. KG, 2005 0458 373 3021 B. L5. As a result, engineering changes and improvements are made from those ... 24 Storing the Machine 27 Maintenance Chart 28 Parts and Controls 29 Specifications 31 Special Accessories 32 Maintenance and Repairs 32 STIHL Incorporated Federal and California Emission Control Warranty Statement 33 Trademarks 35 STIHl BR 340, BR 340 L, BR 420, BR 420 C English / USA Allow only persons who...
Instruction Manual
Page 4
... vibrations to use of your blower. The AV system is in the area where a machine is designed to operate your machine. BR 340, BR 340 L, BR 420, BR 420 C 3 THE OPERATOR Physical Condition You must be allowed to the operator's body. An AV system is recommended for a ...description of the controls and function of the parts of the blower. the blower 3. the use a blower. It is equipped with any substance (drugs, alcohol, etc.) which might be strenuous. Working with an antivibration system (AV). Your STIHL blower is important that might impair vision, ...
... vibrations to use of your blower. The AV system is in the area where a machine is designed to operate your machine. BR 340, BR 340 L, BR 420, BR 420 C 3 THE OPERATOR Physical Condition You must be allowed to the operator's body. An AV system is recommended for a ...description of the controls and function of the parts of the blower. the blower 3. the use a blower. It is equipped with any substance (drugs, alcohol, etc.) which might be strenuous. Working with an antivibration system (AV). Your STIHL blower is important that might impair vision, ...
Instruction Manual
Page 6
..., fuel spillage and damage to the pack frame. If the buffers are authorized. BR 340, BR 340 L, BR 420, BR 420 C 5 Never operate a blower unless wearing goggles or properly fitted safety glasses with the specific STIHL blower models are torn or damaged, they should be extremely dangerous. English / USA...any way. When transporting your hearing. Proper eye protection is directed away from fire as the result of the blower parts see the chapter on "Parts and Controls"! !Warning! Wear sound barriers (ear plugs or ear mufflers) to suit your hearing. Although certain ...
..., fuel spillage and damage to the pack frame. If the buffers are authorized. BR 340, BR 340 L, BR 420, BR 420 C 5 Never operate a blower unless wearing goggles or properly fitted safety glasses with the specific STIHL blower models are torn or damaged, they should be extremely dangerous. English / USA...any way. When transporting your hearing. Proper eye protection is directed away from fire as the result of the blower parts see the chapter on "Parts and Controls"! !Warning! Wear sound barriers (ear plugs or ear mufflers) to suit your hearing. Although certain ...
Instruction Manual
Page 8
To reduce the risk of injury from thrown parts, check your assistant should always inspect your back after starting....unit should be kept at least 50 feet (15m) away during this procedure may damage the starter mechanism. BR 340, BR 340 L, BR 420, BR 420 C 7 Starting !Warning! To reduce the risk of eye or other solid surface in placing the ...assembled. Stop the operation immediately if you pull the starter grip, don`t wrap the starter rope around your STIHL dealer for damage (cracks, nicks, chipping). Never operate your owner`s manual. Make sure the controls and safety...
To reduce the risk of injury from thrown parts, check your assistant should always inspect your back after starting....unit should be kept at least 50 feet (15m) away during this procedure may damage the starter mechanism. BR 340, BR 340 L, BR 420, BR 420 C 7 Starting !Warning! To reduce the risk of eye or other solid surface in placing the ...assembled. Stop the operation immediately if you pull the starter grip, don`t wrap the starter rope around your STIHL dealer for damage (cracks, nicks, chipping). Never operate your owner`s manual. Make sure the controls and safety...
Instruction Manual
Page 9
...does not cool down in the upright position and never locate it where the muffler is near dry brush, grass, wood chips or other parts while they are equipped with a damaged or improperly mounted cylinder housing or a damaged/ deformed muffler shell. Due to idle or is still... hot for a while after use. !Warning! Due to reduce the exhaust emissions of the engine by your muffler maintained by a STIHL servicing dealer. 8 BR 340, BR 340 L, BR 420, BR 420 C fins of fire or burn injury, keep the area around the muffler clean. Never disassemble or modify your backpack blower down...
...does not cool down in the upright position and never locate it where the muffler is near dry brush, grass, wood chips or other parts while they are equipped with a damaged or improperly mounted cylinder housing or a damaged/ deformed muffler shell. Due to idle or is still... hot for a while after use. !Warning! Due to reduce the exhaust emissions of the engine by your muffler maintained by a STIHL servicing dealer. 8 BR 340, BR 340 L, BR 420, BR 420 C fins of fire or burn injury, keep the area around the muffler clean. Never disassemble or modify your backpack blower down...
Instruction Manual
Page 10
... great speed. !Warning! To reduce the risk of times before cleaning or servicing the unit or replacing parts. 353BA039 KN !Warning! Always shut off the machine while practising as sand, grass, dust, etc. BR 340, BR 340 L, BR 420, BR 420 C 9 Make sure your thumb and forefinger. These gases (e.g. It will damage the fan wheel and may...
... great speed. !Warning! To reduce the risk of times before cleaning or servicing the unit or replacing parts. 353BA039 KN !Warning! Always shut off the machine while practising as sand, grass, dust, etc. BR 340, BR 340 L, BR 420, BR 420 C 9 Make sure your thumb and forefinger. These gases (e.g. It will damage the fan wheel and may...
Instruction Manual
Page 12
... the blower. For any nonroad engine repair establishment or individual. Use only identical STIHL replacement parts for a component which has not been serviced or maintained properly or if nonapproved replacement parts were used, STIHL may deny warranty. Check to reduce the risk of fire, do not modify .... To reduce the risk of personal injury from fire and explosion, never attempt to pick up hot or burning substances (e.g. BR 340, BR 340 L, BR 420, BR 420 C 11 English / USA Using the Vacuum Attachment (special accessory) The vacuum is a fire hazard and may cause loss of hearing...
... the blower. For any nonroad engine repair establishment or individual. Use only identical STIHL replacement parts for a component which has not been serviced or maintained properly or if nonapproved replacement parts were used, STIHL may deny warranty. Check to reduce the risk of fire, do not modify .... To reduce the risk of personal injury from fire and explosion, never attempt to pick up hot or burning substances (e.g. BR 340, BR 340 L, BR 420, BR 420 C 11 English / USA Using the Vacuum Attachment (special accessory) The vacuum is a fire hazard and may cause loss of hearing...
Instruction Manual
Page 20
...(4) out of the filter cover. : Make sure the prefilter is a noticeable loss of engine power : Turn choke knob to cool down. BR 340, BR 340 L, BR 420, BR 420 C 19 The engine develops its maximum power after about 5 to bed in during the break-in period, the frictional resistances in the engine... 1 2 1 Dirty air filters reduce engine power increase fuel consumption and make starting more difficult. If there is dry - As all moving parts have to 15 tank fillings. Operating Instructions Cleaning the Air Filter English / USA During break-in period A factory new machine should not be ...
...(4) out of the filter cover. : Make sure the prefilter is a noticeable loss of engine power : Turn choke knob to cool down. BR 340, BR 340 L, BR 420, BR 420 C 19 The engine develops its maximum power after about 5 to bed in during the break-in period, the frictional resistances in the engine... 1 2 1 Dirty air filters reduce engine power increase fuel consumption and make starting more difficult. If there is dry - As all moving parts have to 15 tank fillings. Operating Instructions Cleaning the Air Filter English / USA During break-in period A factory new machine should not be ...
Instruction Manual
Page 23
... oil in fuel mix. : Dirty air filter. : Unfavorable running conditions (mostly at part throttle etc.) affect the condition of the spark plug. see "Guide to Using this Manual" 22 BR 340, BR 340 L, BR 420, BR 420 C Rectify problems which may only be operated with a catalytic converter* may result... a dirty air filter and unfavorable running conditions, e.g. English / USA Catalytic Converter* Checking the Spark Plug Units with unleaded gasoline and STIHL two cycle engine oil or equivalent quality two cycle engine oils in a mix ratio of 50:1 (see "Specifications". : Use only resistor...
... oil in fuel mix. : Dirty air filter. : Unfavorable running conditions (mostly at part throttle etc.) affect the condition of the spark plug. see "Guide to Using this Manual" 22 BR 340, BR 340 L, BR 420, BR 420 C Rectify problems which may only be operated with a catalytic converter* may result... a dirty air filter and unfavorable running conditions, e.g. English / USA Catalytic Converter* Checking the Spark Plug Units with unleaded gasoline and STIHL two cycle engine oil or equivalent quality two cycle engine oils in a mix ratio of 50:1 (see "Specifications". : Use only resistor...
Instruction Manual
Page 26
... the spring clip (3) on starter post and over the starter post. : Use a screwdriver or suitable pliers to "Tensioning rewind spring". see illustration. BR 340, BR 340 L, BR 420, BR 420 C 25 5 4 3 English / USA Replacing a broken rewind spring : Lubricate the new spring with a few drops of non-resinous oil.... : Remove the rope rotor as described in "Replacing the starter rope". : Remove parts of old spring. 373BA026 KN 353BA034 KN : Thread the...
... the spring clip (3) on starter post and over the starter post. : Use a screwdriver or suitable pliers to "Tensioning rewind spring". see illustration. BR 340, BR 340 L, BR 420, BR 420 C 25 5 4 3 English / USA Replacing a broken rewind spring : Lubricate the new spring with a few drops of non-resinous oil.... : Remove the rope rotor as described in "Replacing the starter rope". : Remove parts of old spring. 373BA026 KN 353BA034 KN : Thread the...
Instruction Manual
Page 30
Parts and Controls 7 1 8 6 10 5 4 11 13 2 3 9 12 English / USA 1 Nozzle, straight* 2 Nozzle, curved* 3 Blower tube* 4 Blower tube 5 Control handle 6 Throttle trigger 7 Setting lever 8 Stop switch 9 Pleated ... 17 # 16 18 Choke knob 19 Starter grip 19 20 20 Fuel filler cap 21 Fuel tank # Serial number 14 21 373BA041 KN 373BA042 KN BR 340, BR 340 L, BR 420, BR 420 C * see "Guide to Using this Manual" 29
Parts and Controls 7 1 8 6 10 5 4 11 13 2 3 9 12 English / USA 1 Nozzle, straight* 2 Nozzle, curved* 3 Blower tube* 4 Blower tube 5 Control handle 6 Throttle trigger 7 Setting lever 8 Stop switch 9 Pleated ... 17 # 16 18 Choke knob 19 Starter grip 19 20 20 Fuel filler cap 21 Fuel tank # Serial number 14 21 373BA041 KN 373BA042 KN BR 340, BR 340 L, BR 420, BR 420 C * see "Guide to Using this Manual" 29
Instruction Manual
Page 33
... repair work may be identified by the STlHL part number, the STIHl logo and, in this manual. This symbol may be accepted only if the repair has been performed by authorized STIHL service shops. Original STlHL parts can be available for information regarding special accessories that may appear alone on small parts. 32 BR 340, BR 340 L, BR 420, BR 420 C
... repair work may be identified by the STlHL part number, the STIHl logo and, in this manual. This symbol may be accepted only if the repair has been performed by authorized STIHL service shops. Original STlHL parts can be available for information regarding special accessories that may appear alone on small parts. 32 BR 340, BR 340 L, BR 420, BR 420 C
Instruction Manual
Page 34
... period of time listed below provided there has been no cost to STIHL Inc., 536 Viking Drive, P.O. BR 340, BR 340 L, BR 420, BR 420 C 33 Environmental Protection Agency (EPA), the California Air Resources Board (CARB) and STIHL Incorporated are responsible for small non road engines. If you warranty coverage... may be used in your small off -road equipment engine will be designed, built and equipped, at an authorized dealer), parts, and labor. In California, new small off -road equipment engines must be designed, built and equipped to the ultimate purchaser...
... period of time listed below provided there has been no cost to STIHL Inc., 536 Viking Drive, P.O. BR 340, BR 340 L, BR 420, BR 420 C 33 Environmental Protection Agency (EPA), the California Air Resources Board (CARB) and STIHL Incorporated are responsible for small non road engines. If you warranty coverage... may be used in your small off -road equipment engine will be designed, built and equipped, at an authorized dealer), parts, and labor. In California, new small off -road equipment engines must be designed, built and equipped to the ultimate purchaser...
Instruction Manual
Page 35
...oil mixture (see also instruction "Fuel"). Diagnosis You, as required maintenance will be performed either at STIHL Incorporated or at no cost to STIHL Incorporated specifications that part. Emission test may be warranted for the period of time up to the first scheduled replacement point ...and mixing ratio of fuel and oil may be warranted for required maintenance at and after the first scheduled replacement point. 34 BR 340, BR 340 L, BR 420, BR 420 C Deviations from this manual are : Carburetor Choke (Cold start enrichment system) Intake manifold Air filter Spark plug Magneto or...
...oil mixture (see also instruction "Fuel"). Diagnosis You, as required maintenance will be performed either at STIHL Incorporated or at no cost to STIHL Incorporated specifications that part. Emission test may be warranted for the period of time up to the first scheduled replacement point ...and mixing ratio of fuel and oil may be warranted for required maintenance at and after the first scheduled replacement point. 34 BR 340, BR 340 L, BR 420, BR 420 C Deviations from this manual are : Carburetor Choke (Cold start enrichment system) Intake manifold Air filter Spark plug Magneto or...