Exhaust system for marine propulsion

  • US 4,811,560 A
  • Filed: 09/11/1987
  • Issued: 03/14/1989
  • Est. Priority Date: 09/16/1986
  • Status: Expired due to Term
First Claim
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1. An expansion chamber for the exhaust system of an internal combustion engine powering a small watercraft, said expansion chamber being comprised of an outer housing defining a generally horizontally extending expansion chamber, exhaust gas inlet means for delivering exhaust gases into said expansion chamber at one end thereof, said exhaust gas inlet means having an opening into said expansion chamber of lesser dimensions than the cross sectional area of said expansion chamber for the expansion of exhaust gases as they enter into said expansion chamber, exhaust gas outlet means at the other end of said expansion chamber for delivering exhaust gases to the atmosphere, said exhaust gas outlet means extending through a lower wall of said outer housing and upwardly into said expansion chamber and being defined by a vertically extending wall having an inlet opening disposed above the lower surface of said expansion chamber and of smaller area than said cross sectional area of said expansion chamber for reducing the likelihood of water entering said expansion chamber from said exhaust gas outlet means.

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