Patent ID: 8899029
Filing Date: 2014-12-02
Classification: B63H

Abstract:
1. An apparatus for a marine propulsion system having an internal combustion engine, the apparatus comprising: an exhaust conduit that is configured to convey exhaust from the internal combustion engine; a cooling jacket on the exhaust conduit; a cooling passage between the exhaust conduit and the cooling jacket, the cooling passage configured to guide flow of cooling liquid from upstream to downstream towards a location where the cooling liquid is mixed with exhaust in the exhaust conduit; and first and second baffles on an exterior of the exhaust conduit, wherein the first and second baffles are axially spaced apart and extend transversely with respect to the cooling passage so as to disperse the flow of cooling liquid at the location where the cooling liquid is mixed with the exhaust, thereby reducing reversion of cooling liquid in the exhaust conduit; wherein the first baffle comprises a ridge that transversely extends along a top portion of the exhaust conduit, the ridge having an upstream radially extending side face that also extends transversely to the cooling passage along the top portion of the exhaust conduit.