Marine propulsion device low-speed exhaust system

Details Marine propulsion device low-speed exhaust system Marine propulsion device low-speed exhaust system

F - Mech Eng,Light,Heat,Weapons

01

N

115/6

F01N 13/12 (2010.01) F02B 61/04 (2006.01)

Patent

CA 1302796

ABSTRACT OF THE DISCLOSURE A marine propulsion device comprising an engine including an exhaust outlet, a lower unit adapted to be mounted on a boat for pivotal movement relative thereto about a generally vertical steering axis, the lower unit including a rotatably mounted propeller driven by the engine, an annular chamber having a circumferential length and including a lower portion filled with water, an exhaust gas inlet located below the level of the water and communicating with the exhaust outlet, and an exhaust gas outlet located above the level of the water, and a seal for requiring exhaust gases flowing from the chamber inlet to the chamber outlet to flow around the chamber through a distance substantially greater than 50% of the circumferential length of the chamber.

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