Operation Manual

If 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 muffler upper
casing .
•
Bend back the retaining tabs .
•
Pull out the spark arresting screen
.
•
Clean spark arresting screen if
necessary. If screen is damaged or
coked up, fit a new one.
•
Refit the spark arresting screen in
the reverse sequence.
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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
chain begins to run -
then back off the screw one quarter
of a turn
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•
Turn the idle speed adjusting
screw /$ counterclockwise until
chain stops running -
then turn screw another
quarter turn in the same direction
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Idle setting is too lean
•
Turn the low speed adjusting
screw / counterclockwise -
no further than stop -
until engine runs and accelerates
smoothly -
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Wrong fuel mix (too much engine oil in
the gasoline), a dirty air filter and
unfavorable running conditions (mostly
at part throttle etc.) affect the condition of
the spark plug. These factors cause
deposits to form on the insulator nose
which may result in trouble in operation.
If engine is down on power, difficult to
start or runs poorly at idling speed,
first check the spark plug.
•
Remove spark plug -
see chapter “Starting”:
•
Clean dirty spark plug.
•
Check electrode gap -
it should be 0.5mm/0.02" $ -
readjust if necessary.
•
Use only resistor type spark plugs
of the approved range.
Rectify problems which have caused
fouling of spark plug:
Incorrect carburetor setting, too much oil
in fuel mix, dirty air filter,
unfavorable running conditions, e.g.
operating at part load.
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145BA043 KN
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145BA044 KN
6
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