32
English
MS 381
Adjusting Idle Speed
Engine stops while idling
:
Open the low speed screw (
L
) one
full turn.
:
Turn the idle speed screw (
LA
)
clockwise until chain begins to run –
then turn it back one quarter of a
turn.
Chain runs when engine is idling
:
Open the low speed screw (
L
) one
full turn.
:
Turn the idle speed screw (
LA
)
counterclockwise until chain stops
running – then turn screw another
quarter turn in the same direction.
Erratic idling behavior, poor
acceleration
(even though the low speed screw is
opened one turn)
Idle setting is too lean.
:
Turn the low speed screw (
L
)
counterclockwise until engine
runs and accelerates smoothly.
It is usually necessary to change the
setting of the idle speed screw
(
LA
)
after every correction to the low speed
screw (
L
).
If engine is down on power, difficult to
start or runs poorly at idle speed, first
check the spark plug.
:
Remove the spark plug –
see "Starting / Stopping the Engine".
:
Clean dirty spark plug.
:
Check electrode gap (
A
) and
readjust if necessary – see
"Specifications".
215BA011 KN
L
Checking the Spark Plug
000BA002 KN