Brunswick Corporation

Jay L Menzel

Alvin R Zemlicka

Francis E Bertram

A marine engine exhaust assembly (7) is provided with water flow path control devices which minimize back pressure. Lower intermediate elbow portions (8) and the respective bullhorn upper legs (12) are formed and joined in a manner to provide a continuous common gas-water passage which is axially linear in a fore-to-aft direction. The common gas-water passages are formed to provide a gradual reduction in cross-sectional area from top to bottom. The wall contours of the intermediate elbows gradually merge from circular at the upper end to generally elliptical at the lower end. In addition, the wall contours of the upper bullhorn legs are generally elliptical (FIG. 5) at their upper ends for communicating with the intermediate elbows, and gradually merge into a rectangular shape (FIG. 6) in the area of the bullhorn bends (13), which continues on to adjacent the bullhorn discharge portion. The leading edges of gas-water separator plates (25) are formed with a generally V-shaped downstream curve (28) which provides a slicing edge for the water. A gimbal housing (33) has water-carrying lightening pockets (38) which connect from the bullhorn to drain holes (37) in the housing body. The lightening pockets are short and terminate adjacent their respective drain holes. The inner pocket ends are broadly curved (39) in the direction of the respective drain holes.

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Oshkosh, WI, United States of America

Jay L Menzel