Jay L Menzel

US Patent:

47340711, Mar 29, 1988

Filed:

Apr 13, 1987

Appl. No.:

7/037646

Inventors:

Alvin R. Zemlicka - Elkhart Lake WI
Francis Bertram - Malone WI
Jay L. Menzel - Oshkosh WI

Assignee:

Brunswick Corporation - Skokie IL

International Classification:

B63H 2132

US Classification:

440 89

Abstract:

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.