Spark Arresting Screen In Muffler - Stihl MS 381 Instruction Manual

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