Patent ID: 8783217

Claim:
An apparatus for cooling an engine of a marine propulsion system, the apparatus comprising: an engine having a cylinder block and a cylinder head; an exhaust manifold that conveys hot exhaust gases from the engine; a pump that pumps water from a body of water in which the marine propulsion system is operating to cool the hot exhaust gases in the exhaust manifold and to cool the engine; an exhaust manifold water jacket that conveys the water along a first stream for cooling the hot exhaust gases in the exhaust manifold; a first outlet conduit on the water jacket of the exhaust manifold, the first outlet conduit discharging the first stream to a second stream for cooling the engine; and a second outlet conduit located between the water jacket of the exhaust manifold and the engine, the second outlet conduit diverting a portion of the water away from the engine so that the portion of the water that is diverted away removes heat from the exhaust manifold but does not affect temperature of the engine, including the cylinder block and the cylinder head.