Exhaust device for small sized boat engine

Details Exhaust device for small sized boat engine Exhaust device for small sized boat engine

1989-09-22

1991-02-05

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

Exhaust gas or exhaust system element heated, cooled, or...

440 89, F01N 302

Patent

active

049894099

ABSTRACT:
A small watercraft embodying an improved exhaust system that is substantially completely watercooled by a cooling jacket. The exhaust system includes an elastic joint that is also completely surrounded by the cooling jacket so as to insure adequate cooling under all running conditions. A damming arrangement is incorporated so as to insure that all of the exhaust portions being cooled will be completely encircled with cooling water even when low amounts of water are being circulated and a drain system is also provided so as to insure that the cooling jackets will be drained when the watercraft is removed from a body of water.

REFERENCES:
patent: 3485040 (1969-12-01), Niskanen
patent: 4194460 (1980-03-01), Sato
patent: 4707986 (1987-11-01), Takada
patent: 4773883 (1988-09-01), Nakasa

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