Cooling arrangement for outboard motor

Details Cooling arrangement for outboard motor Cooling arrangement for outboard motor

1998-06-30

2000-05-09

Basinger, Sherman

Marine propulsion

Means for accomodating or moving engine fluids

Cooling for engine

440 89, B63H 2138

Patent

active

060596198

ABSTRACT:
An improved and simplified outboard motor construction wherein the exhaust system for the engine is formed with a minimum number of components and sealing joints. The exhaust system includes an elongated expansion chamber formed in the drive shaft housing. In addition, the drive shaft housing has a cylindrical section that is journaled within a swivel bracket for its steering movement. The volume between the external portion of the drive shaft housing and the internal portion of the swivel bracket forms a second expansion chamber that is employed for the low speed above the water exhaust gas discharge. The flow of cooling the water to and from the engine is controlled so that the exhaust gas interchange area between the power head and the drive shaft housing will be well cooled, as will the oil reservoir for the engine.

REFERENCES:
patent: 3961595 (1976-06-01), Meyer
patent: 4684351 (1987-08-01), Watanabe et al.

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