Spark Plug - Stihl SP 92 T 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
N
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
2
1
Turn screw (1) in cap (2) until cap
N
can be removed
Lay down cap
N
3
Pull off the spark plug boot (3)
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Unscrew spark plug,
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18
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.
Use resistor type spark plugs with a
N
properly tightened adapter nut.
Installing the Spark Plug
Fit the spark plug and tighten it
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down firmly.
Press the boot firmly onto the spark
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plug.
A
2
Fit the cap (1), insert the screw (2)
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and tighten it down firmly.
1
1
SP 92 TC