Oil pan mounting arrangement for four cycle outboard motor

Details Oil pan mounting arrangement for four cycle outboard motor Oil pan mounting arrangement for four cycle outboard motor

1998-03-30

1999-09-21

Kamen, Noah P.

Internal-combustion engines

Frame construction

Horizontal cylinder

440 89, F02F 700

Patent

active

059540222

ABSTRACT:
A four cycle outboard motors that have water cooled engines and an oil pan that is formed in the upper portion of the drive shaft housing. An exhaust pipe collects exhaust gases from an exhaust guide and delivers to a cavity that is formed in the oil pan by an interior wall thereof. The exhaust pipe does not terminate below the lower surface of the oil pan and idle exhaust gases are delivered to the area between the exterior of the exhaust pipe and the interior surface of the oil pan that defines the cavity. These idle exhaust gases are discharged to the atmosphere through and above the water exhaust gas discharge. The oil pan lower surface has a drain opening that is aligned with a vertical drain opening in the drive shaft housing. At least a pair of elastomeric members are clamped between the drive shaft housing and the oil pan to provide stiffness and sound damping.

REFERENCES:
patent: 5118316 (1992-06-01), Kakizaki et al.
patent: 5232387 (1993-08-01), Somigawa

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