Spark Plug - Stihl 410 C-M Instruction Manual

Note for FS 460 with tank cap with
hinged grip: The O-ring supplied with the
cover plate kit can be left on the
machine's filler cap.
Depending on the ambient temperature:
Set the shutter (2) to the summer or
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winter position.
Clean the air filter.
Loosen filter cover mounting
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screws.
Remove the filter cover.
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Clean away loose dirt from around
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the filter (5) and inside the filter
cover.
Knock the filter (5) out on the palm
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of your hand or blow it clear with
compressed air from the inside
outwards.
In case of stubborn dirt or sticky filter
fabric:
Wash the filter in a clean, non-
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flammable solution (e.g. warm
soapy water) and then dry.
Always replace a damaged filter.
FS 360 C-M, FS 410 C-M, FS 460 C-M, FS 490 C-M

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".
Removing the Spark Plug
1
Rotate the screw (1) in the cap (2)
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until the screw head projects from it.
3
Lift the front of the cap (2) and push
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it to the rear to disengage.
Leave the cap to one side.
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Pull off the spark plug boot (3).
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Unscrew the 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
Arcing may occur if the adapter nut (1) is
loose or missing. Working in an easily
combustible or explosive atmosphere
may cause a fire or an explosion. This
can result result in serious injuries or
damage to property.
English
A
1
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