Specifications - Stihl BT 131 Instruction Manual

English
Definitions
1 Stop Switch
Switches the engine's ignition off
and stops the engine.
2 Throttle Trigger Lockout
Must be depressed before the
throttle trigger can be activated.
3 Starter Grip
The grip of the pull starter, for
starting the engine.
4 Air Filter Cover
Covers and protects the air filter
element.
5 Carburetor Adjusting Screw
For setting idle speed.
6 Fuel Filler Cap
For closing the fuel tank.
7 Screw Plug
Seals filler opening for gearbox
grease.
8 Muffler with Spark Arresting Screen
Muffler reduces exhaust noises and
diverts exhaust gases away from
operator.
Spark arresting screen is designed
to reduce the risk of fire.
9 Drilling Spindle
For attaching the chuck or adapter
to the power drill.
10 Padding
Helps cushion thigh against handle
frame.
11 Choke Knob
Eases engine starting by enriching
mixture.
28
12 Manual Fuel Pump
Provides additional fuel feed for a
cold start.
13 Spark Plug Cover
Covers and protects the spark plug.
14 Throttle Trigger
Controls the speed of the engine.
15 Auger Brake Activating Lever
Lever for engaging and disengaging
the auger brake.

Specifications

EPA / CEPA
The Emission Compliance Period
referred to on the Emissions
Compliance Label indicates the number
of operating hours for which the engine
has been shown to meet Federal
emission requirements.
Category
A = 300 hours
B = 125 hours
C = 50 hours
CARB
The Emission Compliance Period used
on the CARB-Air Index Label indicates
the terms:
Extended = 300 hours
Intermediate = 125 hours
Moderate = 50 hours
Engine
STIHL single cylinder four-stroke engine
with mixture lubrication
Displacement: 36.3 cc
(2.22 cu.in)
Bore: 43 mm (1.693 in)
Stroke: 25 mm (0.984 in)
Engine power to ISO 1.4 kW
8893: (1.88 bhp) at
8,500 rpm
Idle speed: 2,800 rpm
BT 131