46
English / USA
MS 650, MS 660
If the engine is down on power, check
the spark arresting screen in the muffler
: Allow muffler to cool down.
: Take out the four screws
: Remove the cover plate (1).
* see „Guide to Using this Manual“
: Bend back the retaining tabs (2)
: Remove the spark arresting
screen (3).
: Clean spark arresting screen.
If screen is damaged or heavily
carbonized, fit a new one.
: Refit the spark arresting screen in
the reverse sequence.
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 result in trouble in operation.
Spark Arresting Screen
in Muffler*
137BA025 KN
1
137BA026 KN
3
2
Checking the Spark Plug
000BA002 KN
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