Spark Plug - Stihl TS 410 Instruction Manual

English

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
Switch off the engine – move stop
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switch to STOP or 0
2
Unscrew screw (1) and remove
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cap (2) – screw (1) is secured in the
cap (2) to prevent loss
3
4
Remove the spark plug boot (3).
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Unscrew the spark plug (4).
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32
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.
–
1
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.
Use resistor type spark plugs with a
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properly tightened adapter nut.
Installing the spark plug
Fit the spark plug by hand and
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screw it in
Tighten spark plug with combination
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wrench
A
Press the spark plug boot firmly
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onto the spark plug
Position the cap for the spark plug
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boot and screw it down
1
TS 410, TS 420