Patent ID: 6652337
Filing Date: 2003-11-25
Classification: B63H

Abstract:
An exhaust system for a marine propulsion engine, comprising:an exhaust manifold; an internal exhaust cavity, formed within said exhaust manifold, which is connectable in fluid communication with a plurality of cylinders of said engine for conducting exhaust gases away from said cylinders; an internal coolant cavity, formed within said exhaust manifold, which is connectable in fluid communication with a coolant conduit of said engine for conducting coolant away from said coolant conduit of said engine; a first surface formed on said exhaust manifold, said internal exhaust cavity intersecting said first surface to form a first opening through which said exhaust gases can flow out of said internal exhaust cavity of said exhaust manifold; and a second surface formed on said exhaust manifold, said internal coolant cavity intersecting said second surface to form a second opening through which said coolant can flow out of said internal coolant cavity of said exhaust manifold, said first and second surfaces being noncontiguous with each other, said first surface being flat and said second surface being flat, said first and second surfaces being disposed in a common plane.