Outboard motor exhaust system

Details Outboard motor exhaust system Outboard motor exhaust system

1995-07-24

1996-11-19

Avila, Stephen

Marine propulsion

Means for accomodating or moving engine fluids

Means for handling exhaust gas

B63H 2132

Patent

active

055756999

ABSTRACT:
A catalytic exhaust system for an outboard motor wherein the catalyst is positioned in the drive shaft housing to remove the source of heat from the power head. However, the catalyst is contained within a sealed compartment in the drive shaft housing lower unit. In order to protect the catalyst from water, a trap section is positioned in the power head and this is water cooled by a source of water which has not passed through the engine for its cooling prior to delivery to the trap section. In addition, the guide plate that separates the power head from the drive shaft housing and through which the exhaust gases pass is also water cooled. An arrangement is incorporated for permitting replacement and servicing of the catalytic converter. Although above the water and below the water exhaust gas discharges are employed, all gases flowing to the atmosphere through either exist pass through the catalytic converter.

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patent: 5280708 (1994-01-01), Sougawa et al.
patent: 5306185 (1994-04-01), Lassanske et al.

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