How to solve the low voltage of Wei Chai 79 1 idling switch?

Wei Chai 79 1 The solution to the low idle switch voltage is as follows.

When the idle speed of the engine is too high, start the engine first, and then control the throttle arm by hand to close the throttle.

If the idle speed is normal at this time, it means that the throttle tension spring is too soft and should be replaced. If closing the throttle manually is ineffective, check whether the throttle shaft is loose or whether the throttle is closed tightly. If the throttle valve is not tightly closed or the throttle shaft is loose, repair it.

If the throttle valve is normal, check whether there is slight air leakage under the throttle valve. If there is, eliminate the air leakage. If not, further adjust the idle speed until the idle speed is appropriate.