Instruction Manual
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... 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...
... 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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...Bystanders, especially children, and animals should never be allowed to the use of any earth auger may have different parts and controls. BT 121 3 Careless or improper use an earth auger. Be alert - Striking a hard object in the earth with electrical wires may result in...controls and function of the parts of any substance (drugs, alcohol, etc.) which might impair vision, dexterity or judgment. Observe all STIHL earth augers. Danger! Different models may cause serious or fatal injury. !Warning! Tiredness may cause severe shock, burns or death. Safety Precautions ...
...Bystanders, especially children, and animals should never be allowed to the use of any earth auger may have different parts and controls. BT 121 3 Careless or improper use an earth auger. Be alert - Striking a hard object in the earth with electrical wires may result in...controls and function of the parts of any substance (drugs, alcohol, etc.) which might impair vision, dexterity or judgment. Observe all STIHL earth augers. Danger! Different models may cause serious or fatal injury. !Warning! Tiredness may cause severe shock, burns or death. Safety Precautions ...
Instruction Manual
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...sensations and may cause nerve and circulation damage and tissue necrosis. Clothing must be drawn into the boring tool. Prolonged use of earth augers (or other machines) exposing the operator to vibration are mentioned as a result of the forces created by strenuous work, check with... with your unit produces an electromagnetic field of a very low intensity. All the factors which contribute to whitefinger disease are recommended. 4 BT 121 The ignition system of your doctor before operating this tool. To reduce the risk of serious or fatal injury, persons with a pacemaker ...
...sensations and may cause nerve and circulation damage and tissue necrosis. Clothing must be drawn into the boring tool. Prolonged use of earth augers (or other machines) exposing the operator to vibration are mentioned as a result of the forces created by strenuous work, check with... with your unit produces an electromagnetic field of a very low intensity. All the factors which contribute to whitefinger disease are recommended. 4 BT 121 The ignition system of your doctor before operating this tool. To reduce the risk of serious or fatal injury, persons with a pacemaker ...
Instruction Manual
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... of head injuries. !Warning! Accidental acceleration of the earth auger parts see the chapters on "Parts and Controls" and "Definitions". By hand: Carry the earth auger with the specific STIHL earth auger models are authorized. carbon monoxide) may ricochet and strike the operator. BT 121 5 Earth auger noise may damage your head when there is not in...
... of head injuries. !Warning! Accidental acceleration of the earth auger parts see the chapters on "Parts and Controls" and "Definitions". By hand: Carry the earth auger with the specific STIHL earth auger models are authorized. carbon monoxide) may ricochet and strike the operator. BT 121 5 Earth auger noise may damage your head when there is not in...
Instruction Manual
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Fuel Mix Your STIHL earth auger uses an oilgasoline mixture for fuel leakage while refueling and during operation...and allow any pressure build-up inside the gas tank of any spilled fuel before starting your clothing immediately. 6 BT 121 California and some other sources on the fuel used, the weather conditions, and the venting system of dust and ... you are unfamiliar with the risks associated with the particular dust or fume at issue, consult your earth auger in the tank to release slowly. Gasoline vapor pressure may build up in well-ventilated areas, outdoors. ...
Fuel Mix Your STIHL earth auger uses an oilgasoline mixture for fuel leakage while refueling and during operation...and allow any pressure build-up inside the gas tank of any spilled fuel before starting your clothing immediately. 6 BT 121 California and some other sources on the fuel used, the weather conditions, and the venting system of dust and ... you are unfamiliar with the risks associated with the particular dust or fume at issue, consult your earth auger in the tank to release slowly. Gasoline vapor pressure may build up in well-ventilated areas, outdoors. ...
Instruction Manual
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...operation before the throttle is damaged, improperly adjusted or not completely and securely assembled. Preparation for information on "Auger brake" for the use of the earth auger You should be operated by stopping the rotation of injury from a turning drilling tool or from reactive forces...the idle position when it is held steady by the operator. Starting For specific starting and when unwinding a trapped auger. BT 121 7 Auger Brake Your model earth auger is equipped with as much force as possible. Injury could result. Unit vibrations can cause an improperly tightened fuel ...
...operation before the throttle is damaged, improperly adjusted or not completely and securely assembled. Preparation for information on "Auger brake" for the use of the earth auger You should be operated by stopping the rotation of injury from a turning drilling tool or from reactive forces...the idle position when it is held steady by the operator. Starting For specific starting and when unwinding a trapped auger. BT 121 7 Auger Brake Your model earth auger is equipped with as much force as possible. Injury could result. Unit vibrations can cause an improperly tightened fuel ...
Instruction Manual
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... properly. When drilling in slow steps frequently clearing drill. 8 BT 121 Clean off auger then continue in heavy clay soil, bore about 1/3 way and remove the auger from a turning drilling tool do not use an earth auger with incorrect idle speed adjustment. Work carefully in injury to drive...! Because the engine speed at starting . For directions to adjust idle speed, see the appropriate section of the earth auger which can cause the auger powerhead and handles to a minimum. When you cannot set the correct idle speed, have your STIHL dealer check your owner's manual.
... properly. When drilling in slow steps frequently clearing drill. 8 BT 121 Clean off auger then continue in heavy clay soil, bore about 1/3 way and remove the auger from a turning drilling tool do not use an earth auger with incorrect idle speed adjustment. Work carefully in injury to drive...! Because the engine speed at starting . For directions to adjust idle speed, see the appropriate section of the earth auger which can cause the auger powerhead and handles to a minimum. When you cannot set the correct idle speed, have your STIHL dealer check your owner's manual.
Instruction Manual
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.... To reduce the risk of serious or fatal injury from reactive forces, never operate your earth auger firmly to control sudden jolts and reactive forces. BT 121 9 If the auger hits something it will cause electrical shock or death. !Warning! Keep your hands in slippery conditions when the ground is not insulated. !Warning! DANGER...
.... To reduce the risk of serious or fatal injury from reactive forces, never operate your earth auger firmly to control sudden jolts and reactive forces. BT 121 9 If the auger hits something it will cause electrical shock or death. !Warning! Keep your hands in slippery conditions when the ground is not insulated. !Warning! DANGER...
Instruction Manual
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... check immediately for longer than a few days. 10 BT 121 If behavior of cracks in good condition. Use the specified spark plug and make sure it over a long distance. Never touch a hot muffler or burn will result. Store earth auger in a high or locked place, away from stepping ...each use. Check fuel filler cap for a component which has not been serviced or maintained properly or if nonapproved replacement parts were used, STIHL may cause hearing loss. English / USA Operating Instructions !Warning! Always shut off the engine before storing for tightness or any nonroad engine...
... check immediately for longer than a few days. 10 BT 121 If behavior of cracks in good condition. Use the specified spark plug and make sure it over a long distance. Never touch a hot muffler or burn will result. Store earth auger in a high or locked place, away from stepping ...each use. Check fuel filler cap for a component which has not been serviced or maintained properly or if nonapproved replacement parts were used, STIHL may cause hearing loss. English / USA Operating Instructions !Warning! Always shut off the engine before storing for tightness or any nonroad engine...
Instruction Manual
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Mounting the Auger Brake Lever : Place the activating lever (1) in the retainer. : Fit the clamp (2) on the activating lever. : Insert the screws (3) and tighten them down firmly. : Attach ... the handlebar with the hook-and-loop strips (3). : Use a suitable tool to push the slide to the bottom of the slot (see illustration). 002BA163 KN BT 121 11
Mounting the Auger Brake Lever : Place the activating lever (1) in the retainer. : Fit the clamp (2) on the activating lever. : Insert the screws (3) and tighten them down firmly. : Attach ... the handlebar with the hook-and-loop strips (3). : Use a suitable tool to push the slide to the bottom of the slot (see illustration). 002BA163 KN BT 121 11
Instruction Manual
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... - Check that it repaired immediately by your STIHL dealer. the activating lever is pressed against the operator's thigh and thus engages the auger brake. Engaging the Auger Brake : Move the activating lever to position A to unwind a trapped auger If the auger snags on an obstacle in the hole (e.g. ...Auger Brake : Move the activating lever to normal wear and tear. at idle speed, engage the auger brake and then open the throttle wide for no more than 3 seconds - If the auger brake fails, have it is subject to position B. 14 BT 121 English / USA Auger Brake Check Operation of Auger...
... - Check that it repaired immediately by your STIHL dealer. the activating lever is pressed against the operator's thigh and thus engages the auger brake. Engaging the Auger Brake : Move the activating lever to position A to unwind a trapped auger If the auger snags on an obstacle in the hole (e.g. ...Auger Brake : Move the activating lever to normal wear and tear. at idle speed, engage the auger brake and then open the throttle wide for no more than 3 seconds - If the auger brake fails, have it is subject to position B. 14 BT 121 English / USA Auger Brake Check Operation of Auger...
Instruction Manual
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... up. : Push retaining pin into the hole. : Spring clip on "Safety Precautions". BT 121 15 Put the earth auger on the ground so that the drilling spindle faces up. : Engage the auger brake. : Pull retaining pin (1) out of the auger's shank. : Push the auger (2) onto the drilling spindle so that position. : Move the slide control (3) to...
... up. : Push retaining pin into the hole. : Spring clip on "Safety Precautions". BT 121 15 Put the earth auger on the ground so that the drilling spindle faces up. : Engage the auger brake. : Pull retaining pin (1) out of the auger's shank. : Push the auger (2) onto the drilling spindle so that position. : Move the slide control (3) to...
Instruction Manual
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... on the handle frame. : Pull the starter grip slowly with your right foot in the handle frame and press down to idle speed. . Since the auger brake is cold. the slide control (3) moves to idle speed immediately - guide it back into the housing so that it might otherwise be returned to... choke knob to full length - English / USA 5 4 427BA007 KN : Set the choke knob (4): To g if engine is still engaged, the engine must be damaged. 16 BT 121
... on the handle frame. : Pull the starter grip slowly with your right foot in the handle frame and press down to idle speed. . Since the auger brake is cold. the slide control (3) moves to idle speed immediately - guide it back into the housing so that it might otherwise be returned to... choke knob to full length - English / USA 5 4 427BA007 KN : Set the choke knob (4): To g if engine is still engaged, the engine must be damaged. 16 BT 121
Instruction Manual
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...: Pull the starter rope several times to 20 pulls may be necessary. English / USA : Stand the unit on the tip of the auger. : Disengage the auger brake by moving the activating lever to idle speed. : Open throttle slightly - If the engine still does not start : If you did... Set the slide control, trigger interlock and throttle trigger to disengage the starting throttle position. : Start the engine - Your earth auger is cold. : Now start the engine. 427BA009 KN BT 121 17 If the engine does not start : : Push the slide control in direction of c to $ At very low outside temperatures...
...: Pull the starter rope several times to 20 pulls may be necessary. English / USA : Stand the unit on the tip of the auger. : Disengage the auger brake by moving the activating lever to idle speed. : Open throttle slightly - If the engine still does not start : If you did... Set the slide control, trigger interlock and throttle trigger to disengage the starting throttle position. : Start the engine - Your earth auger is cold. : Now start the engine. 427BA009 KN BT 121 17 If the engine does not start : : Push the slide control in direction of c to $ At very low outside temperatures...
Instruction Manual
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... enginemounted components (ignition, carburetor) from thermal overload. Drain the fuel Kraftstofftank and store the machine in period. Check the tightness of the auger is in Period A factory new machine should not be kept properly under control. If tank has been run at high revs (full throttle... nuts (not adjusting screws) at least fives times. : Now start the engine. During Operation After a long period of the hole. 18 BT 121 For the same reason the shaft extension must be dissipated by the flow of throttle cable - During Break-in the hole. After Finishing Work...
... enginemounted components (ignition, carburetor) from thermal overload. Drain the fuel Kraftstofftank and store the machine in period. Check the tightness of the auger is in Period A factory new machine should not be kept properly under control. If tank has been run at high revs (full throttle... nuts (not adjusting screws) at least fives times. : Now start the engine. During Operation After a long period of the hole. 18 BT 121 For the same reason the shaft extension must be dissipated by the flow of throttle cable - During Break-in the hole. After Finishing Work...
Instruction Manual
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Releasing a Trapped Auger Cleaning the Air Filter 1 English / USA Motor Management Exhaust emissions are controlled by moving the activating lever to position A. : Now rotate the whole machine to the left - BT 121 19 If there is dirty or damaged, fit a new element. : Fit the flter element in the filter... cover. : Push the filter cover into position. carburation, ignition, timing and valve or port timing) without the addition of any major hardware. 3 2 250BA022 KN If the auger jams...
Releasing a Trapped Auger Cleaning the Air Filter 1 English / USA Motor Management Exhaust emissions are controlled by moving the activating lever to position A. : Now rotate the whole machine to the left - BT 121 19 If there is dirty or damaged, fit a new element. : Fit the flter element in the filter... cover. : Push the filter cover into position. carburation, ignition, timing and valve or port timing) without the addition of any major hardware. 3 2 250BA022 KN If the auger jams...
Instruction Manual
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... to one full turn the low speed screw (L) down the engine. : Remove the auger from the machine. : Check air filter and clean or replace as stop - max. 3/4 turn : Carefully turn in the same direction from that position. 20 BT 121 then turn the screw about another half to adjust the high speed screw...
... to one full turn the low speed screw (L) down the engine. : Remove the auger from the machine. : Check air filter and clean or replace as stop - max. 3/4 turn : Carefully turn in the same direction from that position. 20 BT 121 then turn the screw about another half to adjust the high speed screw...
Instruction Manual
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BT 121 English / USA 25 pay special attention to the cylinder fins and air filter. : Store the machine in accordance with local environmental requirements. : Run engine until carburetor is dry - out of the reach of fuel properly in a dry, high or locked location - this helps prevent carburetor diaphragms sticking together. : Thoroughly clean the machine - Storing the Machine For periods of about 3 months or longer: : Removing the auger. : Drain and clean the fuel tank in a well ventilated area. : Dispose of children and other unauthorized persons.
BT 121 English / USA 25 pay special attention to the cylinder fins and air filter. : Store the machine in accordance with local environmental requirements. : Run engine until carburetor is dry - out of the reach of fuel properly in a dry, high or locked location - this helps prevent carburetor diaphragms sticking together. : Thoroughly clean the machine - Storing the Machine For periods of about 3 months or longer: : Removing the auger. : Drain and clean the fuel tank in a well ventilated area. : Dispose of children and other unauthorized persons.
Instruction Manual
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... intervals apply for normal operating conditions. Complete machine Visual inspection (condition, leaks) X x Clean X Auger brake Check operation X X Have serviced 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...
... intervals apply for normal operating conditions. Complete machine Visual inspection (condition, leaks) X x Clean X Auger brake Check operation X X Have serviced 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...
Instruction Manual
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Main Parts and Controls BT 121 English / USA 1 Starter grip 2 Carburetor adjusting screws 3 Air filter cover 4 Fuel tank filler cap 5 Muffler (with spark arresting screen) 6 Slide control 7 Throttle trigger interlock 8 Throttle trigger 9 Spark plug boot 10 Screw plug 11 Drilling spindle 12 Fuel pump 13 Choke knob 14 Auger brake lever 15 Padding 27
Main Parts and Controls BT 121 English / USA 1 Starter grip 2 Carburetor adjusting screws 3 Air filter cover 4 Fuel tank filler cap 5 Muffler (with spark arresting screen) 6 Slide control 7 Throttle trigger interlock 8 Throttle trigger 9 Spark plug boot 10 Screw plug 11 Drilling spindle 12 Fuel pump 13 Choke knob 14 Auger brake lever 15 Padding 27
