Spark Arresting Screen In Muffler; Checking The Spark Plug - Stihl HS 46 Manual De Instrucciones

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Spark Arresting Screen in
Muffler
If the engine is down on power or
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maximum speed is irregular, check
the spark arresting screen in the
muffler.
WARNING
Wait for the engine to cool down
completely before performing this work.
Use a 15 mm socket wrench to
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unscrew the spark arresting screen.
Clean the spark arresting screen. If
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the screen is damaged or heavily
carbonized, fit a new one.
Refit the spark arresting screen and
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tighten it down firmly.
20

Checking the Spark Plug

If there is a loss of engine power, the
machine is difficult to start or runs poorly
at idle, first check the spark plug.
Install a new spark plug after approx.
100 operating hours or earlier if the
electrodes are 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
Stopping the Engine
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Carefully pry open the flap (1) with a
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suitable tool (e.g. combination
wrench).
2
Remove the spark plug boot (2)
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using a suitable tool (e.g.
combination wrench).
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. See the
chapter "Specifications" in this
instruction manual
Correct the problems that have caused
fouling of the spark plug:
too much oil in fuel mix;
–
dirty air filter; or
–
unfavorable running conditions, e.g.
–
operating at part throttle.
HS 46, HS 46 C, HS 56 C
A