Patent ID: 8590509

Claim:
A speed governor for an engine having a drive gear on a crankshaft and a balancer shaft arranged substantially in parallel to the crankshaft, the speed governor comprising: a driven gear configured to transmit mechanical power from the drive gear to the balancer shaft; a plurality of support pins; a plurality of flyweights pivotally supported on the driven gear of the balancer shaft by the plurality of support pins; and an interlock mechanism for connecting the plurality of flyweights to a fuel feed portion for feeding fuel to a combustion chamber of the engine, wherein the driven gear has a recess portion on an end surface thereof, and the support pins supporting the flyweights are arranged in the recess portion, wherein the recess portion has an annular shape substantially concentric to the driven gear, wherein a plurality of through holes is formed in the driven gear, wherein each of the support pins has two ends in a longitudinal direction, and the through holes are respectively located at the ends of the support pins.