Water jet propulsion watercraft
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United States of America Patent
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Apr 25, 2017
Grant Date -
Aug 27, 2015
app pub date -
May 11, 2015
filing date -
Jul 6, 2011
priority date (Note) -
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Abstract
A water jet propulsion watercraft includes an exhaust passage, a catalyst member, a water lock, a first oxygen sensor, and a second oxygen sensor. The exhaust passage guides exhaust gas from an engine to an exterior of a hull of the watercraft. The catalyst member is arranged inside the exhaust passage. The water lock is arranged in the exhaust passage downstream of the catalyst member. The first oxygen sensor is arranged in the exhaust passage upstream of the catalyst member. The second oxygen sensor is arranged in the exhaust passage at a position downstream of the catalyst member and upstream of the water lock.
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