Patent ID: 7398755

Claim:
An internal combustion engine including a crankcase having a bottom portion and a top portion, and a base plate connected to the bottom portion of the crankcase, the crankcase having a peripheral wall defining at least in part at least one cooling chamber and at least one partition wall inside the at least one cooling chamber; the base plate having an inner surface, an outer surface and an outer edge joining the inner surface to outer surface, the inner surface of the base plate including at least one partition ridge, the at least one partition ridge mating with the at least one partition wall of the crankcase when the base plate is assembled to the bottom portion of the crankcase, the at least one partition ridge and the at least one partition wall together defining at least one cooling fluid passageway in the at least one cooling chamber; the base plate having a plurality of engine mountings integrally formed with the base plate and extending from the outer edge of the base plate for securing the engine to a frame.