32
English
MS 380
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".
:
Rectify the problems which have
caused fouling of spark plug:
–
To much oil in fuel mix.
–
Dirty air filter.
–
Unfavorable running conditions.
:
Fit a new spark plug after
about 100 operating hours
– or
sooner if the electrodes are badly
eroded.
Install only suppressed spark plugs
of the type approved by STIHL –
see "Specifications".
To reduce the risk of arcing
and fire:
:
If the spark plug comes with a
detachable adapter nut (
1
), screw it
on
firmly
.
Checking the Spark Plug
000BA002 KN
1
000BA045 KN
