Exhaust system for small planing boat

  • US 5,234,364 A
  • Filed: 04/08/1991
  • Issued: 08/10/1993
  • Est. Priority Date: 04/12/1990
  • Status: Expired due to Term
First Claim
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1. An exhaust system for a watercraft having a hull with an undersurface which is wetted during normal operation of said watercraft, an inboard engine mounted within said hull and driving a propulsion drive for propelling said hull through a body of water, an exhaust system for receiving exhaust gases from said engine and discharging the exhaust gases to the atmosphere, said exhaust system terminating in a downwardly facing exhaust outlet extending through said hull under surface, and an expansion chamber communicating with said exhaust system at a point above the water level and devoid of water when the watercraft is operating in the body of water for receiving water which may enter the exhaust system through the exhaust outlet when the watercraft is inverted and to receive any water in said exhaust system when said watercraft is inverted and for draining of such received water back to the body of water in which the watercraft is operating through said exhaust system exhaust outlet when the watercraft is righted for precluding water from entering the exhaust ports of the engine.

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