Patent ID: 6875066

Claim:
A sound insulation of an outboard motor comprising: (a) an engine, an exhaust manifold and a drive mechanism for driving a propeller, and (b) an outer cover encasing said engine, exhaust manifold and at least a portion of said drive mechanism, wherein the sound insulation comprises a substantially continuous shroud formed by at least two separable sections of a molded flexible resilient material placed in said outer cover, said molded flexible resilient material comprising a semi-closed cell or an open cell structure having a core between a first and a second outer skin said core having a substantially uniform density of between 4 and 12 lbs/ft 3 and said first and second outer skin density of between about 20 and 30 lbs/ft 3 , said shroud having an outer surface shaped substantially complementary to an inner surface of said outer cover and wherein said outer shroud surface is in contact with said inner surface of said outer cover.