Patent ID: 7954314

Claim:
An engine of a marine propulsion system, comprising: an engine head portion having a first exhaust conduit formed integrally within said engine head portion; an engine block portion having a second exhaust conduit formed integrally within said engine block portion, said engine block portion and said engine head portion being attachable to each other at a connection plane, to form said engine; said first and second exhaust conduits being connectable to each other in fluid communication at an intersection to direct exhaust from said engine head portion to an exhaust outlet of said engine, said first exhaust conduit being configured to direct said exhaust upwardly from said engine head portion toward said intersection, said second exhaust conduit being configured to direct said exhaust downwardly from said intersection to said exhaust outlet of said engine; a catalyst member; and a cavity formed within the body of said engine, said cavity being shaped to receive said catalyst member therein, said catalyst member being disposed within said cavity.