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Carburetor – adjusting the idle speed
15.7
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 sat-
isfactory results, the cause may be a wrongly dimen-
sioned idling jet.
If you can turn the idle air adjusting screw to the end
without any change of engine speed, mount 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.
(50 SX Mini)
–
Screw in idle air adjusting screw
the specified basic setting.
Guideline
Idle air adjusting screw
Open
–
Run the engine until warm.
Guideline
Warming-up phase
H00078-10
Danger
Danger of poisoning Exhaust gases are toxic and inhal-
ing 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
running the engine in an enclosed space.
–
Adjust the idle speed using idle speed adjusting screw
Guideline
Choke function deactivated – The choke lever is pushed
down all the way to the stop. (
Idle speed
–
Turn idle air adjusting screw
tion until the idle speed begins to fall.
–
Note the position and turn the idle air adjusting screw slowly
counterclockwise until the idle speed again begins to fall.
–
Adjust to the point between these two positions with the high-
est idle speed.
TUNING THE ENGINE 15
2
all the way and turn it to
1 turn
≥ 5 min
1
p. 18)
1,400 ... 1,500 rpm
2
slowly in a clockwise direc-
.
101
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