There are three common reasons why the fuel injection pump of the diesel generator set supplies too much fuel:
1. The fuel injection pump plunger is adjusted so that the fuel supply is too large, or the adjusting ring gear locking screw is loosened and the adjustment ring gear is displaced, resulting in excessive fuel supply of the fuel injection pump.
2. The adjustment screw in the governor to limit the maximum oil volume of the rack is too large or the throttle handle limit screw is adjusted too large.
3. Too much oil in the governor will increase the oil supply and lead to "speeding".
