Spark Plug - Stihl MS 201 T Instruction Manual

Spark Plug

If the engine is down on power,
N
difficult to start or runs poorly at idle
speed, first check the spark plug.
Fit a new spark plug after about 100
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operating hours – or sooner if the
electrodes are badly eroded. Install
only suppressed spark plugs of the
type approved by STIHL – see
"Specifications".
Removing the spark plug
Move the master control lever to the
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stop position 0
H
L
Releasing the chain brake
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MS 201 T
2
1
Turn the captive nut (1) to the left
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until it hangs loosely in the chain
sprocket cover
Remove the chain sprocket
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cover (2) with captive nut
Pull off the spark plug boot
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Unscrew spark plug
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Checking the spark plug
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.
–
WARNING
If the spark plug comes with a
detachable adapter nut (1), screw the
adapter onto the thread and tighten it
down firmly to reduce the risk of arcing
and fire.
English
A
1
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