The purpose of the present invention is to make a limit starting position of the fuel injection amount to be set easily from the outside.
A governor device 11 comprises a first lever 31 connecting a governor lever 30 to a rotary speed setting lever 29 interlockingly, a second lever 32 pivotally supported by the first lever 31, and a third lever 33 pivotally supported by the second lever 32, regulated its rotation amount by the second lever 32 and interlocked with a governor weight 22. A fuel injection compensation spring 38 is provided between the first lever 31 and the second lever 32 so as to biases them for decreasing the rotary speed for a fixed amount at the time of low speed rotation. A compensation starting rotary speed setting device 50, which is a set load changing means for the fuel injection compensation spring 38, is provided on the first lever 31 near the fuel injection compensation spring 38.