Engine and personal watercraft

Details Engine and personal watercraft Engine and personal watercraft

2005-07-26

2005-07-26

Avila, Stephen (Department: 3617)

Marine propulsion

Means for accomodating or moving engine fluids

Means for handling exhaust gas

Reexamination Certificate

active

06921308

ABSTRACT:
A personal watercraft and engine therefor are provided. The engine typically is mounted in a personal watercraft and configured to discharge an exhaust gas through a water muffler. The engine typically includes a cylinder head forming a combustion chamber, wherein the cylinder head is provided with an exhaust port configured to draw the exhaust gas from the combustion chamber to the water muffler, and an air passage configured to allow the exhaust port and an outside of the engine to communicate with each other, and the air passage is provided with a valve configured to restrict a flow of air within the air passage.

REFERENCES:
patent: 4071445 (1978-01-01), Katayama et al.
patent: 5846102 (1998-12-01), Nitta et al.
patent: 5934959 (1999-08-01), Inman et al.

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