Stihl FS 261 Instruction Manual page 20

English
Fault
The engine idles
erratically.
The engine stops
while idling.
Cutting attachment
runs while engine is
idling.
The engine does not
reach maximum
speed.
The engine switches
off although there is
still fuel in the fuel
tank.
18.2 Replacing air filter
The air filter cannot be cleaned. The air filter
must be replaced if it is damaged or there is a
loss of engine power.
► Shut off the engine.
► Move the choke lever to the
3
2
1
► Take out the screws (1) and remove the filter
cover (2).
► Clean the area around the air filter (3) with a
damp cloth or a soft brush.
► Take out the air filter (3).
► Install the new air filter (3).
► Fit the filter cover (2).
► Insert screws (1) and tighten.
18.3 Cleaning the Spark Plug
► Shut off the engine.
► Allow trimmer to cool down.
20
Cause
The engine has floo‐
ded.
The carburetor is too
hot.
The carburetor has
iced up.
The carburetor has
iced up.
The carburetor has
iced up.
Throttle cable adjust‐
ment is not correct.
Idle speed adjust‐
ment is not correct.
Throttle cable adjust‐
ment is not correct.
The pickup body is
not located in the
right place.
position.
Remedy
► Start the engine with the choke lever in the position.
► Allow trimmer to cool down.
► Depress the manual fuel pump at least 10 times
before starting the engine.
► Allow brushcutter to warm up to +10°C.
► Allow brushcutter to warm up to +10°C.
► Allow brushcutter to warm up to +10°C.
► Adjust the throttle cable.
► Adjust the idle speed.
► Adjust the throttle cable.
► Contact a STIHL authorized dealer.
1
► Turn screw (1) counterclockwise.
► Lift the cover (2) and push it backwards.
► Pull off the spark plug boot (3).
► If the area around the spark plug (4) is soiled:
Clean the spark plug (4) with a cloth.
► Unscrew the spark plug (4).
► Clean the spark plug (4) with a cloth.
► If the spark plug (4) is corroded: Install a new
spark plug (4).
► Insert and tighten down the spark plug (4)
firmly.
► Press the spark plug boot (3) firmly home.
► Install cover (2) and tighten screw (1).
18.4 Adjust idle speed
► Start the engine.
► Warm up the engine by repeatedly opening
and closing the throttle for about 1 minute.
18 Troubleshooting
2
3
4
0458-837-0101-A