Spark Arresting Screen In Muffler; Spark Plug - Stihl TS 480i Instruction Manual

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Spark Arresting Screen in
Muffler
In some countries, the mufflers are fitted
with a spark arresting screen.
If engine performance deteriorates,
N
check the spark arresting screen in
the muffler.
WARNING
Wait until engine has cooled completely
before performing the following
operations.
2
1
Undo screw (1)
N
Pull the spark arresting screen (2)
N
upward out of the muffler
Clean the soiled spark arresting
N
screen
If the screen is damaged or heavily
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carbonized, fit a new one
Refit the spark arresting screen in
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reverse order of steps
30

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
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
Switch off the engine – move stop
N
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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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.
A
1
TS 480i, TS 500i