Patent ID: 7442103

Claim:
A drive system for a boat having a hull with a longitudinal axis and a single engine mounted in the hull, the drive system comprising: a primary gearbox and opposed first and second outboard gearboxes; a drive shaft connected between the engine and the primary gearbox; a first shaft connected between the primary gearbox and the first outboard gearbox and a second shaft connected between the primary gearbox and the second outboard gearbox; the hull including a transom; first and second stern drive units mounted to the transom; a third drive shaft connected between the first outboard gearbox and the first stern drive unit through the transom; and a fourth drive shaft connected between the second outboard gearbox and the second stern drive unit through the transom and the third and fourth drive shafts being operatively connected to the first and second stern drive units; at least one gearbox including an associated housing and a cooling pad connected to said housing and supplied with cooling liquid.