Maintenance And Repairs - Stihl BT 131 Instruction Manual

Cut-off speed: 9,500 rpm
Valve clearance
Inlet valve: 0.10 mm
(0.004 in)
Exhaust valve: 0.10 mm
(0.004 in)
Ignition System
Electronic magneto ignition
Spark plug (resistor
type): NGK CMR 6H
Electrode gap: 0.5 mm
(0.020 in)
Fuel System
All position diaphragm carburetor with
integral fuel pump
Fuel tank capacity: 0.71 l (24 fl.oz)
Drilling gear
Two-stage spur gear drive
Gear ratio: 47.5:1
Max. spindle speed: 200 rpm
Max. torque at drilling 81 Nm
spindle: (59.74 lbf. ft)
Lubrication: STIHL gear
lubricant for
brushcutters
Weight
Dry, without drilling tool
(auger): 10 kg (22 lbs)
BT 131
Dimensions
Length with handle 400 mm
frame: (15.8 in)
Width with handle frame: 530 mm
(20.9 in)
Height without drilling 365 mm
tool (auger): (14.4 in)
Features
Z Spark arrestor equipment

Maintenance and Repairs

Users of this unit should carry out only
the maintenance operations described
in this manual. STIHL recommends that
other repair work be performed only by
authorized STIHL servicing dealers
using genuine STIHL replacement parts.
Genuine STIHL parts can be identified
by the STIHL part number, the
{ logo and, in some cases, by
the STIHL parts symbol K. The
symbol may appear alone on small
parts.
For repairs of any component of this
unit's air emissions control system,
please refer to the air emissions
systems warranty in this manual.
English
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