Stihl BT 120 C Instruction Manual page 30

Ignition System
Type
Electronic magneto ignition with
electronic speed governor
Spark plug (resistor type)
Bosch WSR 6 F, NGK BPMR 7 A or
Champion RCJ 6 Y (not for all markets)
Electrode gap
0.02 in (0.5 mm)
Spark plug thread
M 14 x 1.25; 0.37 in (9.5 mm) long
Fuel System
Carburetor
All position diaphragm carburetor with
integral fuel pump
Air filter
Paper filter element
Fuel tank capacity
1.35 US pt (0.64 l)
Fuel mix
see chapter on "Fuel"
BT 120 C
Drilling Gear
Type
Two-stage spur gear drive
Gear ratio
47.5 : 1
Max. spindle speed
190 rpm
Max. torque at drilling spindle
79 Nm
Lubrication
STIHL gear lubricant for brushcutters
Weight
without drilling tool (auger)
18.1 lb (8.2 kg)
Dimensions
Length of machine
approx. 14.2 in (360 mm)
Width of handle frame
approx. 20.5 in (520 mm)
Height without drilling tool (auger)
approx. 13.8 in (350 mm)
Rewind Starter
Starter rope: 0.11 in (3.0 mm) diameter,
33.5 in (850 mm) long
English / USA
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)
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