Outboard motor

Details Outboard motor Outboard motor

1998-02-04

2000-03-14

Basinger, Sherman

Marine propulsion

Means for accomodating or moving engine fluids

Means for handling exhaust gas

440 76, B63H 2024

Patent

active

060365587

ABSTRACT:
An outboard motor generally comprises an engine holder to be mounted to a hull, an engine disposed in an upper portion of the engine holder in a mounted state thereof, an oil pan disposed in a lower portion of the engine holder, and a drive-shaft housing disposed below the oil pan and adapted to house a drive shaft of the engine, in which an exhaust gas from the engine is guided to the drive-shaft housing through an exhaust gas passage and the exhaust gas in the drive-shaft housing is discharged outward through an exhaust release passage connected to the drive-shaft housing at a time of low-speed revolution of the engine such as idling operation. There is further provided a partition wall integrally with an inside portion of the drive-shaft housing so as to divide the inside thereof into an expansion chamber communicated with the exhaust gas passage and a release chamber communicated with the exhaust release passage, and the partition wall has a cutout portion at an upper end portion thereof, through which the expansion chamber and the release chamber are communicated with each other.

REFERENCES:
patent: 4795383 (1989-01-01), Binversie et al.
patent: 5595515 (1997-01-01), Hasegawa et al.

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