Stihl FS 240 R Instruction Manual page 20

English
Fault
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.
1 2
► 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.
20
Cause
Throttle cable adjust‐
ment is not correct.
The pickup body is
not located in the
right place.
position.
3
4
Remedy
► Adjust the throttle cable.
► Contact a STIHL authorized dealer.
► 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.
The engine stops while idling
► Turn the idle speed screw (LA) clockwise until
the engine runs smoothly.
Cutting attachment rotates when engine is idling
► Turn the idle speed screw (LA) counterclock‐
wise until the cutting attachment stops rotat‐
ing.
18.5 Adjusting the Throttle Cable
2
► Press the throttle trigger (1) and keep pressed.
► Turn screw (2) clockwise until resistance is
felt.
► Turn the screw (2) clockwise through another
half-turn.
18 Troubleshooting
1
0458-891-0101-A