Patent ID: 7128027

Claim:
A cooling system for an outboard motor, comprising: an oil reservoir having a central passage formed therein; an exhaust opening formed in said oil reservoir; an exhaust gas conduit having an attachment end and a distal end, said exhaust gas conduit being disposed at least partially within said central passage, said exhaust opening and said exhaust gas conduit being disposed in fluid communication with each other to define an exhaust passage extending in a generally downward direction at least partially through said central passage, said exhaust gas conduit being shaped to define a space between an outer surface of said exhaust gas conduit and an inner surface of said central passage; a first water channel formed in said oil reservoir; a second water channel formed in said attachment end of said exhaust gas conduit; a first water transfer passage formed through a portion of said oil reservoir and disposed in fluid communication between said first and second water channels; and a second water transfer passage formed through a portion of said attachment end of said exhaust gas conduit and disposed in fluid communication between said second water channel and said space between said outer surface of said exhaust gas conduit and said inner surface of said central passage, said first and second water transfer passages being disposed on generally opposite sides of said exhaust passage.