Outboard motor

Details Outboard motor Outboard motor

2011-01-11

2011-01-11

Olson, Lars A (Department: 3617)

Marine propulsion

Means for accomodating or moving engine fluids

Means for handling exhaust gas

C440S08900C, C440S08900C

Reexamination Certificate

active

07867048

ABSTRACT:
An outboard motor includes an engine, and a top cowling and a bottom cowling that are arranged to cover the engine. A flow-joining pipe is connected to each exhaust port of a plurality of cylinders of the engine. A first exhaust pipe, a second exhaust pipe, and a third exhaust pipe are connected to the flow-joining pipe in sequence. The flow-joining pipe and the first exhaust pipe are connected generally at the same height as a bottommost of the cylinders of the engine. The third exhaust pipe is disposed above a topmost of the cylinders of the engine. A catalyst is disposed in a connecting portion between the first exhaust pipe and the second exhaust pipe so as to be housed in an upper end portion of the first exhaust pipe and in a lower end portion of the second exhaust pipe. The outboard motor is thus able to prevent water from adhering to a catalyst while avoiding any increase in size.

REFERENCES:
patent: 5174112 (1992-12-01), Sougawa et al.
patent: 5494467 (1996-02-01), Sohgawa et al.
patent: 5911608 (1999-06-01), Nakayama et al.
patent: 6662555 (2003-12-01), Ishii
patent: 6884133 (2005-04-01), Ishii
patent: 2000-356123 (2000-12-01), None
Ochiai; “OutBoard Motor”; U.S. Appl. No. 12/391,332, filed Feb. 24, 2009.

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