9
flight, the speed should not drop below 1200 rpm.
After landing, you can reduce the idle speed again for slow rolls on the ground (less than
1200 rpm)
10 Carburetor settings
At delivery, the carburetor is preset with the following values:
Main needle (side air intake):
1 ¼ - 1 ½ turns on (counterclockwise)
Idle needle (side engine casing):
2 ¼ - 2 ½ turns on (counterclockwise)
Turns to the left (counterclockwise) mean by opening the nozzle enriches the mixture.
Turns to the right (clockwise) mean by close the nozzle leaning of the mixture.
If adjustment is necessary, please proceed with the following steps:
Prepare your model to start the engine before (as described in the chapter on
starting
engine
).
Changing the full gas mixture setting:
Let the engine about two minutes at slightly elevated idling warm up.
Put full power and measure the speed.
Turn the main needle 1/8 turns in or out until you reach the maximum speed.
Beware of the rotating propeller. We recommend stopping the engine before the setting will
be changed.
Changing the idling mixture adjustment:
Let the engine for two minutes at slightly elevated idling warm up.
Measure the speed, which should be between 1000 and 1100 rpm.
If the speed varies, turn the idle needle in 1/8 turns in or out until you have reached a stable
speed.
Check the throttle response during sudden load changes. The rotational speed should not fall
under 1000 - 1100 rpm.
If in doubt, it is always a sure way to make the setting more like a 1/8 turn in the direction of
rich mixture.