Checking The Spark Plug - Stihl MS 192 T Instruction Manual

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
N
"Starting / Stopping the Engine".
Clean dirty spark plug.
N
Check electrode gap (A) and
N
readjust if necessary – see
"Specifications".
Rectify the problems which have
N
caused fouling of the spark plug.
Possible causes are:
Too much oil in fuel mix.
–
Dirty air filter.
–
Unfavorable running conditions.
–
MS 192 T, MS 192 TC
Install a new spark plug after about
N
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
N
thread and tighten it down firmly.
1
On all spark plugs
Always press the boot (2) firmly on
N
to the spark plug (3).
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