16
TUNING THE ENGINE
81
601378-10
The idle mixture is adjusted with the idle adjusting screw
1
.
601379-10
The idle speed is adjusted with adjusting screw
2
.
16.4
Carburetor - adjusting the idle speed
x
601377-10
–
Screw in idle adjusting screw
1
until it stops and then to the prescribed basic set-
ting.
Guideline
Idle mixture adjusting screw
Open
1.5 turns
–
Run the engine until warm.
Guideline
Warm-up time
≥
5 min
Danger
Danger of poisoning
Exhaust gases are toxic 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 adjusting screw
2
.
Guideline
Choke function deactivated
–
The choke lever is pushed back to the stop.
Idle speed
1,550… 1,650 rpm
–
Turn idle adjusting screw
1
slowly clockwise until the idle speed begins to fall.
–
Note the position and turn the idle adjusting screw slowly counterclockwise until
the idle speed falls.
–
Adjust to the point between these two positions with the highest idle speed.