31/CARBURETOR 108
18.19Carburetor - adjusting idle speed (50 SX Mini)
700522-01
– Screw in idle air adjusting screw all the way and turn it to the specified basic
position.
Guideline
Idle air adjusting screw
Open 1 turn
– Run the engine until warm.
Guideline
Warm-up time ≥ 5 min
Danger
Danger of poisoning Exhaust gases are poisonous and inhaling them may
result in unconsciousness and/or death.
– When running the engine, always make sure there is sufficient ventila-
tion, and do not start or run the engine in an enclosed space without an
effective exhaust extraction system.
– Adjust the idle speed with the adjusting screw .
Guideline
Choke function deactivated – The choke lever is pushed down all the way.
Idle speed 1,400… 1,500 rpm
– Turn idle air adjusting screw slowly in a clockwise direction until the idle speed
begins to fall.
– Note the position and turn the idle air adjusting screw slowly counterclockwise until
the idle speed falls again.
– Adjust to the point between these two positions with the highest idle speed.
Info
If the speed rise is too high, reduce the idle speed to a normal level and
repeat the preceding steps.
If the procedure described here does not lead to satisfactory results, the
cause may be a wrongly dimensioned idling jet.
If you can turn the idle air adjusting screw to the end without any change of
engine speed, you need to install a smaller idling jet.
After changing the idling jet, start from the beginning with the adjusting
steps.
Following extreme air temperature or altitude changes, adjust the idle speed
again.
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