Exhaust passage structure of outboard motor
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United States of America Patent
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-
Jan 16, 2018
Issued Date -
N/A
app pub date -
Dec 22, 2015
filing date -
Jan 30, 2015
priority date (Note) -
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status (Latency Note)
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Abstract
In an exhaust passage structure in a V-type four-stroke engine of an outboard motor, an exhaust passage is connected to the respective exhaust ports of a plurality of cylinders so that a first exhaust passage portion is provided on at least one lateral side of the cylinder block in a width direction and collects exhaust gas discharged from the respective exhaust ports of the plurality of cylinder assemblies, while a second exhaust passage portion connects the first exhaust passage portion with an exhaust muffler chamber installed outside the engine, and an exhaust guiding portion is provided so as to oppose to a joint surface between the cylinder block and the cylinder head in a manner to be located in the first exhaust passage portion to guide the exhaust gas discharged from the exhaust ports to a connecting portion between the first exhaust passage portion and the second exhaust passage portion.
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