Lubrication and oil drain system for 4 cycle outboard motor

Details Lubrication and oil drain system for 4 cycle outboard motor Lubrication and oil drain system for 4 cycle outboard motor

1998-08-11

2000-08-08

Morano, S. Joseph

Marine propulsion

Means for accomodating or moving engine fluids

Cooling for engine

123196M, 123196W, B63H 2110

Patent

active

06099374&

ABSTRACT:
An outboard motor having a multi-cylinder four-cycle, internal combustion engine as a power plant. The engine is provided with an oil reservoir in the upper portion of the drive shaft housing and lower unit. Oil is drained back to this oil reservoir by separate drain passages formed in the cylinder head and in the crankcase. In addition, an improved crankcase ventilating system is provided wherein the crankcase ventilating gases follow a circuitous path through the crankcase chamber, camshaft chambers and then to the intake system so as to reduce the emissions of hydrocarbons.

REFERENCES:
patent: 4928641 (1990-05-01), Niizato et al.
patent: 5123385 (1992-06-01), Sado et al.
patent: 5163394 (1992-11-01), Koishikawa et al.
patent: 5524581 (1996-06-01), Rush, II et al.
patent: 5687688 (1997-11-01), Tsunoda et al.
patent: 5704819 (1998-01-01), Isogawa
patent: 5845616 (1998-12-01), Schwarzenthal et al.

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