Stihl Brushcutter - Checking Spark Plug; Adjusting idle speed; Engine stops while idling; Cutting tool rotates when engine is idling

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It is usually necessary to change
the setting of the idle speed
adjusting screw/$ after every
correction to the low speed
adjusting screw /.
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Turn the idle speed
adjusting screw/$
clockwise until engine runs
smoothly - cutting
tool must not rotate.
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Turn the idle speed adjusting
screw /$ counterclockwise until
cutting tool stops rotating -
then back off screw about
another one half turn from that
position.
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Idle setting is too lean.
Turn the low speed adjusting
screw/ counterclockwise until
engine runs and accelerates
smoothly.
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343BA046
0
00BA002 KN
Wrong fuel mix (too much engine oil in
the gasoline), a dirty air filter and un-
favorable running conditions (mostly at
part throttle etc.) affect the condition of
the spark plug. These factors cause
deposits to form on the insulator nose
which may result in trouble in operation.
If engine is down on power, difficult to
start or runs poorly at idling speed,
first check the spark plug.
•
Remove spark plug -
see "If engine doesn’t start:"
•
Clean dirty spark plug.
•
Check electrode gap $ -
it should be 0.7 - 0.8 mm
(about 0.03") -
readjust if necessary.
343BA046
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