Four-cycle outboard motor

Details Four-cycle outboard motor Four-cycle outboard motor

1996-04-16

1998-03-31

Sotelo, Jesus D.

Marine propulsion

Means for accomodating or moving engine fluids

Means for handling exhaust gas

123195P, B63H 2132

Patent

active

057331570

ABSTRACT:
Embodiments of four-cycle outboard motors having an improved exhaust system. The exhaust system includes an expansion chamber that is formed in the drive shaft housing of the outboard motor below an oil tank for the engine which is positioned therein. A water chamber is formed around the expansion chamber and the lower portion of the oil tank for cooling them. An above-the-water exhaust gas discharge is provided that communicates with the area above the water jacket.

REFERENCES:
patent: 5232387 (1993-08-01), Sumigawa

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