Patent ID: 8668538
Filing Date: 2014-03-11
Classification: B63H

Abstract:
1. A marine engine comprising: a cylinder block comprising first and second banks of cylinders that are disposed along a longitudinal axis and extend transversely with respect to each other in a V-shape so as to define a valley there between; a catalyst receptacle disposed in the valley and containing at least one catalyst that treats exhaust gas from the marine engine; and an exhaust manifold conveying exhaust gas from the marine engine to the catalyst receptacle, wherein the exhaust manifold has a first port receiving exhaust gas from the first bank of cylinders, a second port receiving exhaust gas from the second bank of cylinders, and a conduit conveying the exhaust gas from the first and second ports to the catalyst receptacle; wherein from the first and second ports to the catalyst receptacle, the conduit only reverses direction once with respect to the longitudinal axis; wherein the first and second ports are inwardly oriented towards the valley and wherein the exhaust manifold extends out from the valley and then back into the valley.