Marine propulsion – Screw propeller – Propulsion unit casing
Patent
1988-03-31
1988-12-20
Peters, Jr., Joseph F.
Marine propulsion
Screw propeller
Propulsion unit casing
440 75, 440 88, 123196R, B63H 2124
Patent
active
047923130
ABSTRACT:
A marine drive (2) having a lower gearcase (4) with a torpedo housing (10) having an internal lubricant-containing cavity (26) has a removable drain plug (50) and drain plug hole (52) at a location away from the exterior hydrodynamic surface (46) of the torpedo housing along which water flows, to prevent cavitation burns on the torpedo housing and the propeller (24), and to aid in eliminating propeller ventilation.
REFERENCES:
patent: 1181634 (1916-05-01), Bivert
patent: 1932523 (1933-10-01), Irgens
patent: 3871324 (1975-03-01), Snyder
patent: 3896757 (1975-07-01), Kucher
patent: 4178873 (1979-12-01), Bankstahl
"MerCruiser 1987", Mercury Marine Part No. 90-11304-87, 1986.
"MerCruiser Way OUt in Front, 1988,", Mercury Marine Part No. 90-11304-88, 1987.
Brunswick Corporation
Peters Jr. Joseph F.
Sotelo Jesus D.
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