Patent ID: 7517264

Claim:
A drive system for a boat having a hull, an engine having a drive shaft, a pair of propeller shafts, and means for connecting the engine drive shaft and the propeller shafts, the drive system comprising: a primary gearbox and an outboard gearbox; the primary gearbox including a housing and a gear arrangement operatively connected to the engine drive shaft and a first propeller shaft; the outboard gearbox including a housing and a gear arrangement operatively connected to a second propeller shaft; and a transverse shaft operatively connected between the gear arrangements in the primary gearbox and the outboard gearbox; each gearbox including an upper cooling pad connected to a respective housing upper wall and a lower cooling pad connected to a respective housing lower wall, the cooling pads being supplied with cooling liquid from the engine to inhibit overheating of the respective gear arrangement within the housings.