Spark Plug - Stihl GS 461 Instruction Manual

Spark Plug

If the engine is down on power,
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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".
Remove the spark plug
Remove coarse dirt from the
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machine
Turn screw plug above the rear
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handle in the direction of the arrow
and remove filter cover – screw plug
is secured in the filter cover
GS 461
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2
Lift the air baffle (1) up and off
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Unplug spark plug boot (2)
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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.
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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.
Installing the spark plug
A
Install in the spark plug and tighten
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Press on the spark plug boot (1)
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firmly
Insert the air baffle (2) from above
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Mount filter cover
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