초록 ▼

A marine propulsion device (12) including a sleeve (32) formed around an exhaust conduit (26) to form an air cooling passage (34) there between. Cooling air (38) is moved through the cooling passage (34) by an active fan (42) and/or a passive venturi (56). Cooling air (38) is drawn from within an en

A marine propulsion device (12) including a sleeve (32) formed around an exhaust conduit (26) to form an air cooling passage (34) there between. Cooling air (38) is moved through the cooling passage (34) by an active fan (42) and/or a passive venturi (56). Cooling air (38) is drawn from within an engine compartment (24) for a predetermined time before and after the engine (16) is operated. A water-cooled discharge support (70) is located above the waterline (28), thereby preventing the intermixing of exhaust gasses (36) with the environmental water (27).

대표청구항 ▼

1. An exhaust apparatus for a marine engine having an exhaust port, the exhaust apparatus comprising:an exhaust conduit having an inlet end connected to the exhaust port and having a discharge end; a first sleeve disposed around a portion of the exhaust conduit forming a first cooling passage there

1. An exhaust apparatus for a marine engine having an exhaust port, the exhaust apparatus comprising:an exhaust conduit having an inlet end connected to the exhaust port and having a discharge end; a first sleeve disposed around a portion of the exhaust conduit forming a first cooling passage there between; a gas moving apparatus in fluid communication with the first cooling passage; a second sleeve disposed around another portion of the exhaust conduit forming a second cooling passage; and a water circulation system in fluid communication with the second cooling passage.