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Stihl BT 121 User Manual

Stihl BT 121
66 pages
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Instruction Manual
Manual de instrucciones
Warning!
Read and follow all safety precautions in
Instruction Manual – improper use can cause
serious or fatal injury.
Advertencia!
Lea y siga todas las precauciones de
seguridad dadas en el manual de
instrucciones – el uso incorrecto puede
causar lesiones graves o mortales.
STIH)
STIHL BT 121
BA_U1_86_02.fm Seite 0 Dienstag, 7. November 2006 11:04 11

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Stihl BT 121 Specifications

Engine Specifications IconEngine Specifications
displacement30.8 cm3
bore35 mm
stroke32 mm
engine power1.3 kW
max engine speed without drilling tool12, 300 rpm
engine idle speed2, 800 rpm
Sound and Vibration IconSound and Vibration
sound pressure level101 dB (A)
sound power level107 dB (A)
vibration left handle2.6 m/s2
Ignition System IconIgnition System
electrode gap0.5 mm
spark plug threadM 14 x 1.25; 9.5 mm long
spark plugBosch WSR 6 F, NGK BPMR 7 A, Champion RCJ 6 Y
Fuel System IconFuel System
fuel tank capacity0.64 l
carburetor typeAll position diaphragm carburetor
air filterPaper filter element
Drilling Gear IconDrilling Gear
gear typeTwo-stage spur gear drive
gear ratio47.5:1
max spindle speed190 rpm
Weight and Dimensions IconWeight and Dimensions
weight without drilling tool9.4 kg
length of unit400 mm
width of handle frame530 mm

Summary

Safety Precautions and Working Techniques

Operator Requirements and Safety

Details physical, mental, and clothing requirements for safe operation.

Proper Clothing

Specifies required protective apparel for safe operation and to prevent injury.

Fueling and Fuel Management

Fueling Instructions

Provides step-by-step guidance and safety warnings for refueling.

Starting the Engine

Operating the Earth Auger

Instructions on how to operate the earth auger safely and effectively.

Preparation and Auger Brake

Details pre-operation checks and the function of the auger brake.

Operation and Adjustments

Operating Instructions

Assembling the Machine

Fuel Handling and Maintenance

Auger Brake System

Engaging, Disengaging, and Checking Auger Brake

Covers operation and verification of the auger brake system.

Fitting the Auger

Starting / Stopping the Engine

Starting Procedures

Detailed instructions for starting the engine, including throttle and slide control.

Releasing a Trapped Auger

Cleaning the Air Filter

Adjusting the Carburetor

Checking the Spark Plug

Replacing Starter Rope and Rewind Spring

Maintenance Chart

Main Parts and Controls

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