Engine with turbo-charger for an outboard motor

Claim 1

An outboard motor for propelling a watercraft through a body of water, said outboard motor comprising an internal combustion engine having an output shaft, clamping means for fixing said outboard motor to a transom of the watercraft with said output shaft rotating about a vertically extending axis lying within a vertically extending transverse plane, propulsion means carried beneath said engine and driven by said output shaft, said propulsion means having means for cooperating with the water of said body of water for driving the watercraft therethrough, said engine having a plurality of vertically spaced, horizontally disposed cylinders lying on one side of said transverse plane, an induction system having an inlet lying on the other side of said transverse plane, a plenum chamber surrounding said inlet, a turbocharger having a turbine stage and having a compression stage with an outlet, said turbocharger being positioned on the one side of said transverse plane, conduit means extending from said outlet across the top face of said engine and across said transverse plane for delivering pressurized air to an inlet of said plenum chamber upstream of said induction system inlet, an intercooler extending in a vertical plane along said one vertical side of said engine and contained within said plenum chamber and interposed between the point of induction of air from said supercharger and said induction system inlet, and a protective cowling encircling said engine, said supercharger and said plenum chamber.