Carburetor - Adjusting The Idle Speed - GAS GAS MC 125 2022 Owner's Manual

15.5

Carburetor - adjusting the idle speed

–
Screw in idle air adjusting screw
specified basic setting.
Info
The basic adjustment is shown under the respective model.
–
Run the engine until warm.
Guideline
Warming-up phase
402799-11
Danger
Danger of poisoning Exhaust gases are toxic and inhaling
them may result in unconsciousness and death.
–
Always make sure there is sufficient ventilation when
running the engine.
–
Use effective exhaust extraction when starting or run-
ning the engine in an enclosed space.
–
Adjust the idle speed with adjusting screw
Guideline
Choke function deactivated – The choke lever is pushed in to the
stop. ( p. 16)
Idle speed
–
Turn idle air adjusting screw
the idle speed begins to fall.
–
Note the position and turn the idle air adjusting screw slowly coun-
terclockwise until the idle speed again begins to fall.
–
Adjust to the point between these two positions with the highest
idle speed.
Info
If there is a big engine speed rise, reduce the idle speed to a
normal level and repeat the above 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 with-
out any change of engine speed, mount a smaller idling jet.
After changing the jet, start from the beginning with the
adjusting steps.
Following extreme air temperature or altitude changes,
adjust the idle speed again.
TUNING THE ENGINE 15
1
all the way and turn it to the
≥ 5 min
2
.
1,400 ... 1,500 rpm
1
slowly in a clockwise direction until
99