Patent ID: 6746290
Filing Date: 2004-06-08
Classification: B63H,F01M,F01N,F02B

Abstract:
An outboard motor comprising a housing unit adapted to be mounted on an associated watercraft, an internal combustion engine disposed above the housing unit, the engine having a first exhaust passage to discharge exhaust gases from the engine, and a lubricant reservoir disposed below the engine, the housing unit having a second exhaust passage that communicates with the first exhaust passage and extends below the lubricant reservoir, the second exhaust passage extending to a first exhaust discharge port that communicates with an external location, the housing unit having a third exhaust passage, the lubricant reservoir having at least one wall extending generally vertically, the wall having an internal exhaust conduit that defines at least a portion of the third exhaust passage, the third exhaust passage having an inlet that communicates with the second exhaust passage at a point below the lubricant reservoir, the third exhaust passage extending upwardly to a point at about the same elevation as an upper end of the lubricant reservoir, and the third exhaust passage extending to a second exhaust discharge port that communicates with another external location and is disposed higher than the first exhaust discharge port.