GS 461
English
23
N If the engine is down on power,
difficult to start or runs poorly at idle
speed, first check the spark plug.
N 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".
Remove the spark plug
N Remove coarse dirt from the
machine
N Turn screw plug above the rear
handle in the direction of the arrow
and remove filter cover – screw plug
is secured in the filter cover
N Lift the air baffle (1) up and off
N Unplug spark plug boot (2)
N Unscrew spark plug
Checking the spark plug
N Clean dirty spark plug.
N Check electrode gap (A) and
readjust if necessary – see
"Specifications".
N Rectify the problems which have
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.
Installing the spark plug
N Install in the spark plug and tighten
N Press on the spark plug boot (1)
firmly
N Insert the air baffle (2) from above
N Mount filter cover
Spark Plug
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