Instruction Manual
Page 2
... 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! T. To receive maximum performance and satisfaction from your earth auger. Printed in this manual to reduce the risk of the instructions in...
... 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! T. To receive maximum performance and satisfaction from your earth auger. Printed in this manual to reduce the risk of the instructions in...
Instruction Manual
Page 4
..., etc.) which might impair vision, dexterity or judgment. the use of all applicable local safety regulations, standards and ordinances. Observe all STIHL earth augers. See "Working Conditions" below. !Warning! the earth auger 3. BT 121 3 Safe use an earth auger. the operator 2. Striking a hard object in good physical condition and mental health and not under the influence of control. Never...
..., etc.) which might impair vision, dexterity or judgment. the use of all applicable local safety regulations, standards and ordinances. Observe all STIHL earth augers. See "Working Conditions" below. !Warning! the earth auger 3. BT 121 3 Safe use an earth auger. the operator 2. Striking a hard object in good physical condition and mental health and not under the influence of control. Never...
Instruction Manual
Page 5
...! English / USA Working with any earth auger can be sturdy and snug-fitting, but allow complete freedom of movement. Wear sturdy footwear with a pacemaker should consult their hands and fingers. All the factors which contribute to whitefinger disease are recommended. 4 BT 121 Maintain a firm grip at all times, but cold weather, smoking and diseases...
...! English / USA Working with any earth auger can be sturdy and snug-fitting, but allow complete freedom of movement. Wear sturdy footwear with a pacemaker should consult their hands and fingers. All the factors which contribute to whitefinger disease are recommended. 4 BT 121 Maintain a firm grip at all times, but cold weather, smoking and diseases...
Instruction Manual
Page 6
... death. Thrown objects may increase the risk of injury. Earth auger noise may damage your hearing. Transporting by STIHL for use , shut it off and put it down so it reach extremely high temperatures. BT 121 5 Wear sound barriers (ear plugs or ear mufflers)... to your eyes never 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. Never modify an earth auger in...
... death. Thrown objects may increase the risk of injury. Earth auger noise may damage your hearing. Transporting by STIHL for use , shut it off and put it down so it reach extremely high temperatures. BT 121 5 Wear sound barriers (ear plugs or ear mufflers)... to your eyes never 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. Never modify an earth auger in...
Instruction Manual
Page 7
Fuel Mix Your STIHL earth auger uses an oilgasoline mixture for the type of the tank. Always shut off any bystanders should always wear a ...to release slowly. Gasoline vapor pressure may build up in well-ventilated areas, outdoors. California and some other sources on your earth auger carefully so as OSHA and NIOSH and other authorities, for fuel leakage while refueling and during operation. Do not smoke or ...issue, consult your employer, governmental agencies such as to allow it to get fuel on your clothing immediately. 6 BT 121 English / USA !Warning!
Fuel Mix Your STIHL earth auger uses an oilgasoline mixture for the type of the tank. Always shut off any bystanders should always wear a ...to release slowly. Gasoline vapor pressure may build up in well-ventilated areas, outdoors. California and some other sources on your earth auger carefully so as OSHA and NIOSH and other authorities, for fuel leakage while refueling and during operation. Do not smoke or ...issue, consult your employer, governmental agencies such as to allow it to get fuel on your clothing immediately. 6 BT 121 English / USA !Warning!
Instruction Manual
Page 8
... reactive forces, the operator must move freely and return immediately to start the earth auger. BT 121 7 Preparation for the use of the earth auger You should also be operated by stopping the rotation of the auger / powerhead when the brake activating lever is designed to reduce the risk of... the brake. !Warning! It should always inspect your earth auger if it is released. Operating the earth auger The earth auger should be started only when it on engagement of fuel spillage and fire, tighten the fuel filler cap ...
... reactive forces, the operator must move freely and return immediately to start the earth auger. BT 121 7 Preparation for the use of the earth auger You should also be operated by stopping the rotation of the auger / powerhead when the brake activating lever is designed to reduce the risk of... the brake. !Warning! It should always inspect your earth auger if it is released. Operating the earth auger The earth auger should be started only when it on engagement of fuel spillage and fire, tighten the fuel filler cap ...
Instruction Manual
Page 9
... slow steps frequently clearing drill. 8 BT 121 English / USA !Warning! When you cannot set the correct idle speed, have your STIHL dealer check your hands. 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. To...
... slow steps frequently clearing drill. 8 BT 121 English / USA !Warning! When you cannot set the correct idle speed, have your STIHL dealer check your hands. 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. To...
Instruction Manual
Page 10
...and/or by use of electrical shock. Wrap your fingers tightly around the handles, keeping the handles cradled between your earth auger only outdoors in severe jerking and loss of the powerhead. !Warning! Contact with electrical cables or wires can cause ...earth auger firmly with an auger brake. Work carefully. Make sure your earth auger without a properly functioning auger brake. To reduce the risk of moisture, pitch, oil or grease. If the auger hits something it will cause electrical shock or death. !Warning! Operate the earth auger under control at all times. BT 121...
...and/or by use of electrical shock. Wrap your fingers tightly around the handles, keeping the handles cradled between your earth auger only outdoors in severe jerking and loss of the powerhead. !Warning! Contact with electrical cables or wires can cause ...earth auger firmly with an auger brake. Work carefully. Make sure your earth auger without a properly functioning auger brake. To reduce the risk of moisture, pitch, oil or grease. If the auger hits something it will cause electrical shock or death. !Warning! Operate the earth auger under control at all times. BT 121...
Instruction Manual
Page 11
...maintenance or repair work. Always stop the engine before doing any signs of tool changes, check immediately for longer than a few days. 10 BT 121 Store earth auger in a high or locked place, away from stepping in particular. !Warning! Use the specified spark plug and make sure it over a...the machine down or transporting it and the ignition lead are always in your body. When taking the drilling tool out of your STIHL servicing dealer only. !Warning! Follow the maintenance and repair instructions in good condition. Check to rotate for leaks at regular short ...
...maintenance or repair work. Always stop the engine before doing any signs of tool changes, check immediately for longer than a few days. 10 BT 121 Store earth auger in a high or locked place, away from stepping in particular. !Warning! Use the specified spark plug and make sure it over a...the machine down or transporting it and the ignition lead are always in your body. When taking the drilling tool out of your STIHL servicing dealer only. !Warning! Follow the maintenance and repair instructions in good condition. Check to rotate for leaks at regular short ...
Instruction Manual
Page 15
...BT 121 Engaging the Auger Brake : Move the activating lever to position A to normal wear and tear. at idle speed, engage the auger brake and then open the throttle wide for no more than 3 seconds - the activating lever is subject to engage the brake - Check that it repaired immediately by your STIHL dealer. English / USA Auger... Brake Check Operation of Auger Brake Before you start work . the auger must not rotate. The auger brake is pressed against the operator's thigh and thus engages the auger brake. roots or stones) the earth auger ...
...BT 121 Engaging the Auger Brake : Move the activating lever to position A to normal wear and tear. at idle speed, engage the auger brake and then open the throttle wide for no more than 3 seconds - the activating lever is subject to engage the brake - Check that it repaired immediately by your STIHL dealer. English / USA Auger... Brake Check Operation of Auger Brake Before you start work . the auger must not rotate. The auger brake is pressed against the operator's thigh and thus engages the auger brake. roots or stones) the earth auger ...
Instruction Manual
Page 16
...engine. BT 121 15 Starting : Press down the throttle trigger interlock (1), squeeze the throttle trigger (2) and hold it there. : Now release the throttle trigger, slide control and throttle trigger interlock in that position. : Move the slide control (3) to position A. 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 order. Engaging Auger Brake : Move the activating lever ...
...engine. BT 121 15 Starting : Press down the throttle trigger interlock (1), squeeze the throttle trigger (2) and hold it there. : Now release the throttle trigger, slide control and throttle trigger interlock in that position. : Move the slide control (3) to position A. 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 order. Engaging Auger Brake : Move the activating lever ...
Instruction Manual
Page 18
... start: : Push the slide control in direction of c to $ At very low outside temperatures: Allow engine to warm up the engine for operation. Your earth auger is now ready for a short period. To shut down firmly. : Move the slide control to START. : Move the choke knob to position B. If.... : Start the engine - English / USA : Stand the unit on the tip of the auger. : Disengage the auger brake by moving the activating lever to e even if the engine is cold. : Now start the engine. 427BA009 KN BT 121 17 pull the starter rope briskly - 10 to 20 pulls may be necessary.
... start: : Push the slide control in direction of c to $ At very low outside temperatures: Allow engine to warm up the engine for operation. Your earth auger is now ready for a short period. To shut down firmly. : Move the slide control to START. : Move the choke knob to position B. If.... : Start the engine - English / USA : Stand the unit on the tip of the auger. : Disengage the auger brake by moving the activating lever to e even if the engine is cold. : Now start the engine. 427BA009 KN BT 121 17 pull the starter rope briskly - 10 to 20 pulls may be necessary.
Instruction Manual
Page 30
...: 0.11 in (3.0 mm) diameter, 33.5 in (850 mm) long Drilling Tools (Augers) Earth augers 1.6, 2.4, 3.5, 4.7, 5.9, 7.9 in diameter (40, 60, 90, 120, 150, 200 mm), 27.4 in (695 mm) long Planting hole auger 10.2 in (260 mm) Planting auger 6 in (150 mm) diameter, 20.6 in (525 mm) long Special Accessories Shaft extension... 17.7 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 ...
...: 0.11 in (3.0 mm) diameter, 33.5 in (850 mm) long Drilling Tools (Augers) Earth augers 1.6, 2.4, 3.5, 4.7, 5.9, 7.9 in diameter (40, 60, 90, 120, 150, 200 mm), 27.4 in (695 mm) long Planting hole auger 10.2 in (260 mm) Planting auger 6 in (150 mm) diameter, 20.6 in (525 mm) long Special Accessories Shaft extension... 17.7 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 ...