Spark Arresting Screen In Muffler; Checking The Spark Plug - Stihl MS 192 Instruction Manual

Spark Arresting Screen in
Muffler
In some countries the muffler is
equipped with a spark arresting screen.
If the engine is down on power,
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check the spark arresting screen in
the muffler.
Wait for the muffler to cool down.
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Remove the sprocket cover.
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Take out the screw (1).
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Remove the baffle plate (2).
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Remove the spark arresting
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screen (3).
Clean the spark arresting screen. If
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the screen is damaged or heavily
carbonized, fit a new one.
Refit the spark arresting screen.
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Fit the baffle plate.
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MS 192 C

Checking the Spark Plug

If the engine is down on power, difficult
to start or runs poorly at idle speed, first
check the spark plug.
Remove the spark plug – see
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"Starting / Stopping the Engine".
Clean dirty spark plug.
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Check electrode gap (A) and
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readjust if necessary – see
"Specifications".
Rectify the problems which have
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caused fouling of the spark plug.
Possible causes are:
Too much oil in fuel mix.
–
Dirty air filter.
–
Unfavorable running conditions.
–
Install a new spark plug after about
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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:
Screw the adapter nut (1) onto the
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thread and tighten it down firmly.
English
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