Spark Arresting Screen In Muffler; Spark Plug - Stihl HT 131 Instruction Manual

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Spark Arresting Screen in
Muffler
In some countries the muffler is
equipped with a spark arresting screen.
If the engine is down on power,
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check the spark arresting screen in
the muffler.
Wait for the muffler to cool down.
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Move the slide control to STOP-0.
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Take out the screw (1).
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3
2
Take out the screws (2) and remove
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the shroud (3).
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Take out the screw (4).
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Lift the spark arresting screen (5)
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and pull it out.
Clean the spark arresting screen. If
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the screen is damaged or heavily
1
carbonized, fit a new one.
Refit the spark arresting screen.
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Insert the screw and tighten it down
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firmly.
Fit the shroud.
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2

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
Move the slide control to STOP-0.
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1
Pull off the spark plug boot (1).
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Unscrew the spark plug.
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HT 100, HT 101, HT 130, HT 131