The idle speed of the diesel generator set is too high, which means that when the accelerator is lifted, the engine speed is still higher than the specified idle speed. The reasons for the high idling speed are:

① The throttle lever is not adjusted properly.

② The accelerator return spring is too soft.

What are the reasons for the high idle speed of diesel generator sets?

③ The idle speed limit stop or adjustment screw is out of balance.

④ The idle spring is too hard or the preload is adjusted too much.

Excessive idle speed of diesel generator set is one of the faults that are easy to check and eliminate. First, check whether the throttle has returned to the small position. If it is not in place, check the throttle adjustment and throttle return. Adjust the throttle cable limit screw, if the throttle still cannot be returned, check whether the throttle return spring is too soft. If it is a fuel injection pump that has been repaired and debugged soon, it should be considered whether the idle speed adjustment is correct, and whether the idle speed spring preload adjustment is too large. If the spring has been replaced, check whether the spring is too hard.