33
MS 381
English
:
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
.
On all spark plugs:
:
Always press the boot (
2
)
firmly
on
to the spark plug (
3
).
:
If the engine is down on power,
check the spark arresting screen in
the muffler.
:
Wait for the muffler to cool down.
:
Take out the screw (
1
).
:
Remove the muffler exhaust casing
(
2
).
* see “Guide to Using this Manual”
1
000BA045 KN
3
000BA050 KN
2
Spark Arresting Screen in
Muffler*
1
1
1
1
2
538BA003 KN