Marine engine with galvanic circuit protection

Details Marine engine with galvanic circuit protection Marine engine with galvanic circuit protection

1989-06-19

1991-07-16

Sotelo, Jesus D.

Marine propulsion

Means for accomodating or moving engine fluids

Means for handling exhaust gas

60321, B63H 512

Patent

active

050320955

ABSTRACT:
Disclosed herein is a stern drive unit comprising an engine including a coolant jacket and an exhaust port, an exhaust gas discharge system including an exhaust gas manifold communicating with the exhaust port, a high-rise elbow communicating with the exhaust gas manifold, and an exhaust pipe communicating with the high-rise elbow and adapted to convey exhaust gas to an overboard discharge, a high-rise elbow and exhaust gas manifold coolant jacket surrounding the exhaust gas manifold and at least partially surrounding the high-rise elbow and communicating with the exhaust pipe for discharge of coolant from the high-rise elbow and exhaust gas manifold coolant jacket and through the exhaust pipe to an overboard discharge, which high-rise elbow and exhaust gas manifold coolant jacket includes a coolant discharge surface over which coolant is discharged from the high-rise elbow and exhaust gas manifold coolant jacket for flow to the exhaust pipe, a coolant conduit communicating between the engine coolant jacket and the high-rise elbow and exhaust gas manifold coolant jacket and including a portion extending at least as high as the discharge surface of the high-rise elbow and exhaust gas manifold coolant jacket and over which coolant flows, and a supply conduit for supplying coolant to the engine coolant jacket in response to engine operation.

REFERENCES:
patent: 3431882 (1969-03-01), Irgens
patent: 3541786 (1970-11-01), Sarra
patent: 3759041 (1973-09-01), North et al.
patent: 3921398 (1975-11-01), Kashmerick
patent: 3968767 (1976-07-01), Blanchard
patent: 4212281 (1980-07-01), Ernest
patent: 4399797 (1983-08-01), Iwai
patent: 4759181 (1988-07-01), Biritz
patent: 4831822 (1989-05-01), Yoshimura

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