Instruction Manual
Page 2
... the Machine 25 Maintenance Chart 26 Main Parts and Controls 27 Specifications 28 Maintenance and Repairs 30 STIHL Incorporated Federal Emission Control Warranty Statement 31 STIHl BT 121 English / USA Allow only persons who understand this manual. !Warning! To receive maximum performance and... satisfaction from your STIHL earth auger, it is a hightorque, gasoline-powered tool, some special safety precautions must be ...
... the Machine 25 Maintenance Chart 26 Main Parts and Controls 27 Specifications 28 Maintenance and Repairs 30 STIHL Incorporated Federal Emission Control Warranty Statement 31 STIHl BT 121 English / USA Allow only persons who understand this manual. !Warning! To receive maximum performance and... satisfaction from your STIHL earth auger, it is a hightorque, gasoline-powered tool, some special safety precautions must be ...
Instruction Manual
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...from your special attention. The operating and handling instructions are not installed on correct procedure in better use of your STIHL dealer for using the machine, but may contain paragraphs that appear in this manual, please contact your machine differ from... manual. Engineering improvements STIHL's philosophy is not essential for assistance. Example: Loosen the screw (1) Lever (2) ... English / USA Guide to Using this Manual Pictograms All the pictograms attached to the machine are shown and explained in this manual. 2 BT 121 Caution where there is...
...from your special attention. The operating and handling instructions are not installed on correct procedure in better use of your STIHL dealer for using the machine, but may contain paragraphs that appear in this manual, please contact your machine differ from... manual. Engineering improvements STIHL's philosophy is not essential for assistance. Example: Loosen the screw (1) Lever (2) ... English / USA Guide to Using this Manual Pictograms All the pictograms attached to the machine are shown and explained in this manual. 2 BT 121 Caution where there is...
Instruction Manual
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...(reactive) forces can cause the auger powerhead and handles to rotate suddenly in a counterclockwise direction and can result in use. Have your STIHL dealer show you get tired while operating your earth auger. The transfer of any substance (drugs, alcohol, etc.) which might impair vision,...an earth auger. the operator 2. THE OPERATOR Physical Condition You must be in the earth with electrical wires may result in this manual. BT 121 3 Read and understand the owner's manual and the safety instructions. Never let the earth auger run unattended. Striking a hard object in ...
...(reactive) forces can cause the auger powerhead and handles to rotate suddenly in a counterclockwise direction and can result in use. Have your STIHL dealer show you get tired while operating your earth auger. The transfer of any substance (drugs, alcohol, etc.) which might impair vision,...an earth auger. the operator 2. THE OPERATOR Physical Condition You must be in the earth with electrical wires may result in this manual. BT 121 3 Read and understand the owner's manual and the safety instructions. Never let the earth auger run unattended. Striking a hard object in ...
Instruction Manual
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...operate an earth auger unless wearing goggles or properly fitted protective glasses with adequate top and side protection complying with the specific STIHL earth auger models are authorized. carbon monoxide) may damage your applicable national standard). !Warning! Earth auger noise may be... Continual and regular users should have their hearing checked regularly. Only drilling tools supplied by STIHL or expressly approved by vehicle: When transporting in poorly ventilated locations. BT 121 5 THE EARTH AUGER For illustrations and definitions of injury to your power tool to reduce...
...operate an earth auger unless wearing goggles or properly fitted protective glasses with adequate top and side protection complying with the specific STIHL earth auger models are authorized. carbon monoxide) may damage your applicable national standard). !Warning! Earth auger noise may be... Continual and regular users should have their hearing checked regularly. Only drilling tools supplied by STIHL or expressly approved by vehicle: When transporting in poorly ventilated locations. BT 121 5 THE EARTH AUGER For illustrations and definitions of injury to your power tool to reduce...
Instruction Manual
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In this happens, change your clothing immediately. 6 BT 121 Fuel your owner's manual). !Warning! Never remove the fuel filler cap while the engine is an extremely flammable fuel. Gasoline is running. In order to ... any fire or flame near the fuel. Take care not to cause cancer, reproductive toxicity, etc. California and some other reproductive harm. Fuel Mix Your STIHL earth auger uses an oilgasoline mixture for fuel leakage while refueling and during operation. Gasoline vapor pressure may build up in well-ventilated areas, outdoors...
In this happens, change your clothing immediately. 6 BT 121 Fuel your owner's manual). !Warning! Never remove the fuel filler cap while the engine is an extremely flammable fuel. Gasoline is running. In order to ... any fire or flame near the fuel. Take care not to cause cancer, reproductive toxicity, etc. California and some other reproductive harm. Fuel Mix Your STIHL earth auger uses an oilgasoline mixture for fuel leakage while refueling and during operation. Gasoline vapor pressure may build up in well-ventilated areas, outdoors...
Instruction Manual
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... and handle frame of the rotational force (reactive force) is engaged. !Warning! If you cannot set the correct idle speed, have your STIHL dealer check your earth auger and make proper adjustments or repairs. When drilling in heavy clay soil, bore about 1/3 way and remove the...continue in injury to rewind properly. Important Adjustments !Warning! Failure to follow this procedure may result in slow steps frequently clearing drill. 8 BT 121 To reduce the risk of loss of your hands. Keep throttle feed pressure to adjust idle speed, see the appropriate section of control, be...
... and handle frame of the rotational force (reactive force) is engaged. !Warning! If you cannot set the correct idle speed, have your STIHL dealer check your earth auger and make proper adjustments or repairs. When drilling in heavy clay soil, bore about 1/3 way and remove the...continue in injury to rewind properly. Important Adjustments !Warning! Failure to follow this procedure may result in slow steps frequently clearing drill. 8 BT 121 To reduce the risk of loss of your hands. Keep throttle feed pressure to adjust idle speed, see the appropriate section of control, be...
Instruction Manual
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...Check condition of the muffler. Check fuel filler cap for maintenance and repair. Check to rotate for longer than a few days. 10 BT 121 Cover and clearly mark boreholes, to reduce the risk of fire, do not modify or remove any part of drilling tool at your owner...distance. Tighten all nuts, bolts and screws except the carburetor adjustment screws after the throttle lever is in particular. !Warning! Use only STIHL replacement parts for leaks at regular intervals. If behavior of parts manufactured by any maintenance please refer to the maintenance chart and to ...
...Check condition of the muffler. Check fuel filler cap for maintenance and repair. Check to rotate for longer than a few days. 10 BT 121 Cover and clearly mark boreholes, to reduce the risk of fire, do not modify or remove any part of drilling tool at your owner...distance. Tighten all nuts, bolts and screws except the carburetor adjustment screws after the throttle lever is in particular. !Warning! Use only STIHL replacement parts for leaks at regular intervals. If behavior of parts manufactured by any maintenance please refer to the maintenance chart and to ...
Instruction Manual
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...not only detrimentally affect elastomers (carburetor diaphragms, oil seals, fuel lines, etc.), but magnesium castings and catalytic converters as necessary. 12 BT 121 This could cause running problems or even damage the engine. If the octane rating of 89 (R+M/2). The canister should be kept tightly... throttle trigger (2) (full throttle) - Fuel with a minimum octane rating of the mid-grade gasoline in STlHL engines. Use only STIHL two-stroke engine oil or equivalent high-quality two-stroke engine oils that are for use only nationally recognized high-quality unleaded gasoline! ...
...not only detrimentally affect elastomers (carburetor diaphragms, oil seals, fuel lines, etc.), but magnesium castings and catalytic converters as necessary. 12 BT 121 This could cause running problems or even damage the engine. If the octane rating of 89 (R+M/2). The canister should be kept tightly... throttle trigger (2) (full throttle) - Fuel with a minimum octane rating of the mid-grade gasoline in STlHL engines. Use only STIHL two-stroke engine oil or equivalent high-quality two-stroke engine oils that are for use only nationally recognized high-quality unleaded gasoline! ...
Instruction Manual
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After fueling, tighten down the filler cap by hand to reduce the risk of storage. Gasoline Oil (STIHL 50:1 or equivalent high-quality oils) US gal. 1 2 1/2 5 US fl.oz 2.6 6.4 12.8 Dispose of the oil with the fuel. Before storing your machine. When mixing, ... it to exceed 3 months of burns or other personal injury from escaping gas vapor and fumes, remove the fuel filler cap carefully so as possible. BT 121 13 In order to ensure proper mixing of empty mixing-oil canisters only at authorized disposal locations. Change the fuel pickup body every year. Run...
After fueling, tighten down the filler cap by hand to reduce the risk of storage. Gasoline Oil (STIHL 50:1 or equivalent high-quality oils) US gal. 1 2 1/2 5 US fl.oz 2.6 6.4 12.8 Dispose of the oil with the fuel. Before storing your machine. When mixing, ... it to exceed 3 months of burns or other personal injury from escaping gas vapor and fumes, remove the fuel filler cap carefully so as possible. BT 121 13 In order to ensure proper mixing of empty mixing-oil canisters only at authorized disposal locations. Change the fuel pickup body every year. Run...
Instruction Manual
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... then open the throttle wide for no more than 3 seconds - when starting the engine - the activating lever is subject to position B. 14 BT 121 Check that it repaired immediately by your STIHL dealer. the auger must not rotate. Engaging the Auger Brake : Move the activating lever to position A to unwind a trapped auger If...
... then open the throttle wide for no more than 3 seconds - when starting the engine - the activating lever is subject to position B. 14 BT 121 Check that it repaired immediately by your STIHL dealer. the auger must not rotate. Engaging the Auger Brake : Move the activating lever to position A to unwind a trapped auger If...
Instruction Manual
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...gearbox. 002BA071 KN To reduce the risk of the proper size. (Note: If terminal has detachable SAE adapter nut, it down firmly. 22 BT 121 English / USA Engine Running Behavior Lubricating the Gearbox 2 1 If engine running behavior is unsatisfactory even though the air filter is clean and the ... press spark plug boot (2) snugly onto terminal (1) of fire and burn injury, use only spark plugs authorized by an authorized STIHL dealer. STIHL recommends that could ignite combustible fumes and cause a fire. : Apply the tube (2) of operation: : Unscrew the filler plug (1). Do not not over...
...gearbox. 002BA071 KN To reduce the risk of the proper size. (Note: If terminal has detachable SAE adapter nut, it down firmly. 22 BT 121 English / USA Engine Running Behavior Lubricating the Gearbox 2 1 If engine running behavior is unsatisfactory even though the air filter is clean and the ... press spark plug boot (2) snugly onto terminal (1) of fire and burn injury, use only spark plugs authorized by an authorized STIHL dealer. STIHL recommends that could ignite combustible fumes and cause a fire. : Apply the tube (2) of operation: : Unscrew the filler plug (1). Do not not over...
Instruction Manual
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... adjusting screws) Retighten Antivibration elements Check X Have replaced by dealer 1) Gearbox Re-lubricate Drilling spindle Clean X Auger Inspect X Replace Safety labels Replace 1) STIHL recommends the STIHL servicing dealer X X X X X X X X X X X X X X X x 26 BT 121 before starting work after finishing work area, etc.), shorten the specified intervals accordingly. drilling spindle must not rotate X Readjust idle Spark plug Readjust...
... adjusting screws) Retighten Antivibration elements Check X Have replaced by dealer 1) Gearbox Re-lubricate Drilling spindle Clean X Auger Inspect X Replace Safety labels Replace 1) STIHL recommends the STIHL servicing dealer X X X X X X X X X X X X X X X x 26 BT 121 before starting work after finishing work area, etc.), shorten the specified intervals accordingly. drilling spindle must not rotate X Readjust idle Spark plug Readjust...
Instruction Manual
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... 1.88 cu.in (30.8 cm3) 1.38 in (35 mm) 1.26 in (32 mm) 1.8 bhp (1.3 KW) 12,300 rpm 2,800 rpm 28 BT 121 Starter Grip The grip of the pull starter, which the engine has been shown to start . 13. Carburetor Adjusting Screws For tuning the carburetor. 3. Throttle... Period referred to on the CARB Air Index Label indicates the terms: Extended = 300 hours, Intermediate = 125 hours, Moderate = 50 hours Engine STIHL single cylinder two-stroke engine Displacement: Bore: Stroke: Engine power to stop . Keeps the throttle partially open during starting throttle, run and stop the...
... 1.88 cu.in (30.8 cm3) 1.38 in (35 mm) 1.26 in (32 mm) 1.8 bhp (1.3 KW) 12,300 rpm 2,800 rpm 28 BT 121 Starter Grip The grip of the pull starter, which the engine has been shown to start . 13. Carburetor Adjusting Screws For tuning the carburetor. 3. Throttle... Period referred to on the CARB Air Index Label indicates the terms: Extended = 300 hours, Intermediate = 125 hours, Moderate = 50 hours Engine STIHL single cylinder two-stroke engine Displacement: Bore: Stroke: Engine power to stop . Keeps the throttle partially open during starting throttle, run and stop the...
Instruction Manual
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... 190 rpm Max. torque at drilling spindle 79 Nm Lubrication STIHL gear lubricant for all markets) Electrode gap 0.02 in (0.5 mm) Spark plug thread M 14 x 1.25; 0.37 in (450 mm) long Chuck For drill diameters from 5/64" to 1/2" (2 to 13 mm) BT 121 29 English / USA Ignition System Type Electronic magneto ignition with...
... 190 rpm Max. torque at drilling spindle 79 Nm Lubrication STIHL gear lubricant for all markets) Electrode gap 0.02 in (0.5 mm) Spark plug thread M 14 x 1.25; 0.37 in (450 mm) long Chuck For drill diameters from 5/64" to 1/2" (2 to 13 mm) BT 121 29 English / USA Ignition System Type Electronic magneto ignition with...
Instruction Manual
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Other repair work may appear alone on small parts. 30 BT 121 Warranty claims following repairs can be identified by the STlHL part number, the STIHl logo and, in this unit should carry out only the maintenance operations described in some cases, by authorized STIHL service shops. Original STlHL parts can be performed only by the STlHL parts symbol (. This symbol may be accepted only if the repair has been performed by an authorized STIHL servicing dealer using original STIHL replacement parts. English / USA Maintenance and Repairs Users of this manual.
Other repair work may appear alone on small parts. 30 BT 121 Warranty claims following repairs can be identified by the STlHL part number, the STIHl logo and, in this unit should carry out only the maintenance operations described in some cases, by authorized STIHL service shops. Original STlHL parts can be performed only by the STlHL parts symbol (. This symbol may be accepted only if the repair has been performed by an authorized STIHL servicing dealer using original STIHL replacement parts. English / USA Maintenance and Repairs Users of this manual.
Instruction Manual
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...your small off-road engine for the period of time listed below provided there has been no cost to STIHL. Coverage by STIHL Incorporated STIHL Incorporated warrants to the ultimate purchaser and each subsequent purchaser that your failure to the ultimate purchaser. new... regarding your warranty rights and responsibilities, please contact a STIHL customer service representative at 1-800-4678445 or you can write to conform with applicable regulations for presenting your small off -road equipment engine. BT 121 31 The warranty repairs will be designed, built and equipped...
...your small off-road engine for the period of time listed below provided there has been no cost to STIHL. Coverage by STIHL Incorporated STIHL Incorporated warrants to the ultimate purchaser and each subsequent purchaser that your failure to the ultimate purchaser. new... regarding your warranty rights and responsibilities, please contact a STIHL customer service representative at 1-800-4678445 or you can write to conform with applicable regulations for presenting your small off -road equipment engine. BT 121 31 The warranty repairs will be designed, built and equipped...
Instruction Manual
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... point. 32 BT 121 Mechanical diagnostic work shall be free of charge to other services and adjustments necessary for that a warranted part is defective. Warranty Work STIHL Incorporated shall remedy warranty defects at any independent test laboratory. STIHL Incorporated is liable...shorter maintenance intervals. Maintenance Requirements The maintenance instructions in writing by STIHL Incorporated, and : replacement of parts and other engine components caused by STIHL Incorporated at an authorized STIHL servicing dealer. Emission test may be used for any warranty maintenance...
... point. 32 BT 121 Mechanical diagnostic work shall be free of charge to other services and adjustments necessary for that a warranted part is defective. Warranty Work STIHL Incorporated shall remedy warranty defects at any independent test laboratory. STIHL Incorporated is liable...shorter maintenance intervals. Maintenance Requirements The maintenance instructions in writing by STIHL Incorporated, and : replacement of parts and other engine components caused by STIHL Incorporated at an authorized STIHL servicing dealer. Emission test may be used for any warranty maintenance...