How to adjust the idle time of 19 model?

Screw in the idle adjustment screw with a screwdriver.

Step 1: firstly loosen the throttle opening adjusting screw to make the engine reach the lowest stable speed.

2. Then screw in the idle adjustment screw with a screwdriver, and then slowly unscrew the idle adjustment screw when the engine is about to stall, so that the engine can run smoothly and reach a high speed.

3. Then loosen the throttle opening adjustment screw to make the engine speed as low as possible.

4: Then adjust the idle adjusting screw to increase the engine speed.