Exhaust system for outboard motor

Details Exhaust system for outboard motor Exhaust system for outboard motor

1993-11-24

1995-01-03

Swinehart, Edwin L.

Marine propulsion

Means for accomodating or moving engine fluids

Means for handling exhaust gas

F01N 328

Patent

active

053781805

ABSTRACT:
Two embodiments of outboard motors embodying tuned exhaust systems having exhaust pipes and expansion chambers into which the exhaust pipes extend. A catalyst is positioned in the exhaust system downstream of the point where the exhaust pipe terminates in the expansion chamber so as to preclude interference with the exhaust tuning. The catalyst bed is removable for ease of servicing without necessitating removal of the outboard motor from the its attachment to the associated watercraft and a trap device is provided for precluding water from entering the engine through its exhaust ports.

REFERENCES:
patent: 3644098 (1972-02-01), De Palma et al.
patent: 4023361 (1977-05-01), Kojima
patent: 4354847 (1982-10-01), Blanchard
patent: 4372111 (1983-08-01), Virk et al.
patent: 4735046 (1988-04-01), Iwai
patent: 5203167 (1993-04-01), Lassanske et al.

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