Exhaust apparatus for small boat
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United States of America Patent
Stats
-
Feb 15, 2011
Grant Date -
Oct 2, 2008
app pub date -
Mar 25, 2008
filing date -
Mar 28, 2007
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An exhaust apparatus for a small boat for reducing exhaust noise. A water muffler is provided at a midsection of the exhaust pipes extending from an engine which is provided in a boat body. An interior of the water muffler is partitioned into an expansion chamber and a resonator chamber with a front exhaust pipe connected to the engine and a rear exhaust pipe opening out of the boat being interlinked with the expansion chamber. The resonator chamber is directly connected to the midsection of the rear exhaust pipe via a connecting pipe. The water muffler is arranged in a longitudinal direction that is oriented in the fore-and-aft direction so as to extend along the side of a pump chamber in which a jet pump driven by the engine is arranged. A second resonator chamber is arranged along the water muffler on the outer side of the water muffler.
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