What is an idle adjustment screw?

Idle adjustment screw-adjust the oil output of idle nozzle by changing the size of idle nozzle;

More specifically, the idle nozzle is not pure oil, but foamed gasoline mixed in the idle air metering hole;

The mixture adjusting screw-also known as the minimum throttle opening adjusting screw-can adjust the load condition at idle speed by adjusting the minimum throttle opening.

For an exaggerated example, increasing the minimum throttle opening is equivalent to the effect of lightly stepping on the throttle when you are idling, and the idle speed naturally increases.

Usually two screws are used to adjust the idle speed. First, adjust the idle speed adjusting screw to the maximum, and then move the mixed gas adjusting screw to stabilize the idle speed at the required speed. Finally, screw in the idle speed adjusting screw gradually until the idle speed swings, and then turn it back to 1/4 turns.