Engine Running Behavior - Stihl FS 410 C-M Instruction Manual

Checking the Spark Plug
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.
–
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.
FS 410 C-M, FS 460 C-M
Use resistor type spark plugs with a
N
properly tightened adapter nut.
Installing the Spark Plug
Screw the spark plug into the
N
cylinder.
Press the spark plug boot firmly
N
onto the spark plug.
A
2
Fit the cap (1) on the shroud from
N
the rear and push the lug (2) into the
opening (3) in the shroud at the
same time.
Swing the cap forwards onto the
N
shroud, insert and tighten down the
screw (4) firmly.
1
4
3

Engine Running Behavior

If engine running behavior is still
unsatisfactory after servicing the air filter
and adjusting the throttle cable, the
cause may be the muffler.
Have the muffler checked by a servicing
dealer for contamination
(carbonization).
STIHL recommends that you have
servicing and repair work carried out
exclusively by an authorized STIHL
servicing dealer.
English
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