Spark Arresting Screen In Muffler; Spark Plug - Stihl MS 441 C-M Manual De Instrucciones

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Spark Arresting Screen in
Muffler
In some countries, the muffler is fitted
with a spark arresting screen.
If engine performance deteriorates,
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check the spark arresting screen in
the muffler
Let the muffler cool down
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Remove screw (1)
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Pull out spark arresting screen (2)
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Clean the dirty spark arresting
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screen, replace if damaged or
heavily carbonized
Refit the spark arresting screen
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Insert and tighten down the screw
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Spark Plug

If the engine is down on power, difficult
to start or runs poorly at idling speed,
first check the spark plug.
Install a new spark plug after approx.
100 operating hours or earlier if the
electrodes are badly eroded/corroded.
The wrong fuel mix (too much engine oil
in the gasoline), a dirty air filter and
unfavorable running conditions (mostly
at part throttle etc.) affect the condition
of the spark plug. These factors cause
deposits to form on the insulator nose
which may degrade performance.
Removing the spark plug
Move the Master Control lever to the
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stop position (0).
Use the combination wrench to
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open the fasteners (1) in the
direction of the arrow.
Remove the carburetor box
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cover (2).
Pull off the spark plug boot (3).
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Unscrew the spark plug.
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Checking the spark plug
Clean the spark plug if it is dirty
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Check the electrode gap (A) and
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readjust if necessary – see
"Specifications"
Use only resistor type spark plugs of
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the approved range
Correct the problems that have caused
fouling of the spark plug:
too much oil in fuel mix,
–
dirty air filter,
–
unfavorable running conditions, e.g.
–
operating at part throttle.
A
MS 441 C-M