Stihl BT 121 User Manual

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

Stihl BT 121 Specifications

Engine Specifications

displacement	30.8 cm3
bore	35 mm
stroke	32 mm
engine power	1.3 kW
max engine speed without drilling tool	12, 300 rpm
engine idle speed	2, 800 rpm

Sound and Vibration

sound pressure level	101 dB (A)
sound power level	107 dB (A)
vibration left handle	2.6 m/s2

Ignition System

electrode gap	0.5 mm
spark plug thread	M 14 x 1.25; 9.5 mm long
spark plug	Bosch WSR 6 F, NGK BPMR 7 A, Champion RCJ 6 Y

Fuel System

fuel tank capacity	0.64 l
carburetor type	All position diaphragm carburetor
air filter	Paper filter element

Drilling Gear

gear type	Two-stage spur gear drive
gear ratio	47.5:1
max spindle speed	190 rpm

Weight and Dimensions

weight without drilling tool	9.4 kg
length of unit	400 mm
width of handle frame	530 mm