Stihl FS 131 User Manual

FS 131, FS 131 R
English
37
The carburetor has been set at the
factory to provide an optimum fuel-air
mixture under most operating
conditions.
Adjusting Idle Speed
Engine stops while idling
N Warm up the engine for about
3 minutes.
N Turn the idle speed screw (LA)
slowly clockwise until the engine
runs smoothly – the cutting
attachment must not run.
Cutting attachment runs when engine is
idling
N Turn the idle speed screw (LA)
slowly counterclockwise until the
cutting attachment stops running
and then turn the screw about
another 1/2 to 3/4 turn in the same
direction.
WARNING
If the cutting attachment continues to run
when the engine is idling, have your
machine checked and repaired by your
servicing dealer.
N If the engine is down on power,
check the spark arresting screen in
the muffler.
N Wait for the muffler to cool down.
N Take out the screw (4).
N Lift the spark arresting screen (5)
and pull it out.
N Clean the spark arresting
screen (5). If the screen is damaged
or heavily carbonized, install a new
one.
N Refit the spark arresting screen (5).
N Insert the screw (4) and tighten it
down firmly.
If there is a loss of engine power, the
machine is difficult to start or runs poorly
at idle, first check the spark plug.
Install a new spark plug after
approximately 100 operating hours or
earlier if the electrodes are
eroded/corroded.
The wrong fuel mix (too much engine oil
in the gasoline), a dirty air filter and
unfavorable running conditions (mostly
at part throttle etc.) affect the condition
of the spark plug. These factors cause
deposits to form on the insulator nose,
which may degrade performance.
Removing the Spark Plug
N Remove the cover (1).
N Pull off the spark plug boot (2).
N Unscrew the spark plug (3).
Adjusting the Carburetor
0000-GXX-0495-A0
Spark Arresting Screen in
Muffler
0000-GXX-0486-A0
4
5
Spark Plug
3
2
1
0000-GXX 0537-A0

Stihl FS 131 Specifications

General

Type	Brush cutter
Cordless	Yes
Head type	Blade
Handle type	U-type handle
Engine power	1.9 hp
Product color	Black, Metallic, Orange
Uncertainty K	2 m/s²
Rotational speed	8500 RPM
Number of strokes	4
Sound power level	109 dB
Fuel tank capacity	0.71 L
Vibration emission	4.9 m/s²
Engine displacement	36.3 cm³
Sound pressure level	98 dB
Cutting diameter (max)	- mm
Power source	Gasoline

Weight and Dimensions

Length	1800 mm
Weight	5800 g