Cooling water passage structure of outboard motor

Details Cooling water passage structure of outboard motor Cooling water passage structure of outboard motor

1998-06-09

2000-01-11

Avila, Stephen

Marine propulsion

Means for accomodating or moving engine fluids

Cooling for engine

440900, 123 4109, B63H 2110

Patent

active

060129565

ABSTRACT:
An outboard motor is equipped with an engine, an engine holder, an oil pan disposed below the engine in a state of the outboard motor being mounted to a hull, a water pump disposed below the oil pan, and a cooling water passage structure. The cooling water passage structure includes a vertical cooling water passage vertically passing through inside the oil pan and communicated with the side of the engine, a lateral cooling water passage extending in a lateral direction along a bottom surface of the oil pan, a cooling water supply pipe extending upward from the water pump and connected to a side of the engine, and a water pressure relief valve provided for the lateral cooling water passage for controlling a pressure increasing of the cooling water. The lateral cooling water passage has one end communicated with a lower end of the vertical cooling water passage and has another one end to which an upper end of the cooling water supply pipe is connected.

REFERENCES:
patent: 4669988 (1987-06-01), Breckenfeld et al.
patent: 5330376 (1994-07-01), Okumura
patent: 5487688 (1996-01-01), Sumigawa
patent: 5715777 (1998-02-01), Wada et al.
patent: 5876256 (1999-03-01), Takahashi et al.

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