Patent ID: 6904889

Claim:
An engine of a personal watercraft, comprising: a crankcase having a front end wall and a rear end wall; a crankshaft provided inside the crankcase; a generator chamber formed in a rear portion of the rear end wall of the crankcase; a generator provided in the generator chamber, the generator being positioned at an output end portion of the crankshaft on a rear side of the engine, the generator including a rotor mounted to a portion of the output end portion of the crankshaft; a coupling configured to be coupled to a propeller shaft of the watercraft, wherein the coupling is coaxially mounted outside the generator chamber and on a rear side of the rotor; a starter motor provided on an output end side of the crankshaft outside the crankcase; a clutch provided between the starter motor and the rotor of the generator, for connecting and disconnecting the starter motor to and from the rotor; a cam chain tunnel formed on an opposite side of the output end side of the crankshaft; a cam chain sprocket mounted to an end portion of the crankshaft on the opposite side of the output end side, the crankshaft passing through a penetrating hole formed in the front end wall of the crankcase and protruding into the cam chain tunnel; and wherein the crankshaft passes through a penetrating hole formed in the rear end wall of the crankcase and the output end portion of the crankshaft protrudes into the generator chamber; and wherein the output end portion of the crankshaft is configured to transmit a propulsion force for propelling the watercraft; and wherein a seal member is provided in the penetrating hole of the crankcase to seal between an inside of the crankcase and the generator chamber.