Adjusting The Throttle Cable; Specifications - Stihl Fs 251 R Notice D'emploi

22 Specifications

at partial throttle) can affect the condition of the
spark plug and cause deposits to form on the
insulator nose, degrading performance.
To clean the spark plug:
► Shut off the engine,
► Allow the trimmer / brushcutter to cool down.
1 2
► Turn the screw (1) counterclockwise.
► Lift the cap (2) and push it backwards.
► Remove the spark plug boot (3).
► Clean the area around the spark plug with a
cloth or soft brush.
► Unscrew the spark plug (4) and clean it with a
cloth.
► If the spark plug is corroded, replace it.
► If the spark plug is damp, dry it thoroughly
before re-inserting it.
► Insert the spark plug and tighten it down firmly.
► Connect the spark plug boot and press it down
firmly.
► Place the cap in position.
► Tighten the screw.
21.4 Adjusting Idle Speed
WARNING
■ To reduce the risk of personal injury from loss
of control and/or contact with the cutting
attachment, do not use your trimmer / brush‐
cutter with incorrect idle adjustment. At correct
idle speed, the cutting attachment should not
move. If the cutting attachment continues
moving when the engine is idling, have your
trimmer / brushcutter checked and repaired by
your servicing dealer.
0458-853-8201-A
12.1.
3
4
Engine stops when idling
Adjust the engine idle speed:
► Start the engine.
► Warm up the engine by opening and closing
the throttle for about 1 minute.
► Turn the idle speed screw (LA) slowly clock‐
wise until the engine runs smoothly.
Cutting attachment moves continuously when
engine is idling
Adjust the trimmer's / brushcutter's idle speed:
► Start the engine.
► Warm up the engine by opening and closing
throttle for about 1 minute.
► Turn the idle speed screw (LA) slowly counter‐
clockwise until the cutting attachment stops
moving.
21.5

Adjusting the Throttle Cable

NOTICE
■ It may be necessary to correct the adjustment
of the throttle cable after assembling the
machine or after a prolonged period of opera‐
tion.
Adjust the throttle cable only when the unit is
completely and properly assembled.
To adjust the throttle cable:
2
► Fully depress the throttle trigger (1) and hold it
in this position.
► Carefully rotate the screw (2) in the throttle
trigger in the direction of the arrow until you
feel initial resistance.
► Rotate the screw another half turn in the same
direction.
22 Specifications
22.1 CEPA
The Emission Compliance Period referenced on
the Emissions Compliance Label indicates the
number of operating hours for which the engine
has been shown to meet federal emission
requirements.
English
1
35