How to adjust the speed of Carter 320c engine?

1. First, screw the air conditioning screw to the bottom, and then turn it. Second, adjust the throttle screw to ensure that the engine can run at a certain speed after the throttle knob is completely loosened.

2. Secondly, try to reduce the idle speed to reduce the engine speed as much as possible.

3. Then try to increase the idle speed, and adjust the air conditioning screw to make the engine speed as high as possible.

4. Finally, repeat the above steps and adjust several times to find a satisfactory idle speed.