31HT 70, HT 75
english
Erratic idling behavior
Idle setting too rich:
: Turn low speed screw (L) clockwise
(about 1/4 turn) until the engine runs
and accelerates smoothly.
If the engine is low on power, check the
spark arresting screen in the muffler.
: Lift spark arresting screen and pull it
out sideways.
: Clean spark arresting screen if
necessary.
: If screen is damaged or coked up, fit
a new one.
: Refit the spark arresting screen.
* see “Guide to Using this Manual”
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
392BA035 KN
Checking the Spark Plug
000BA002 KN
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