| 摘要 |
An exhaust system of an outboard motor includes: an exhaust passage forward portion including exhaust passages for leading exhaust in the exhaust passage of an exhaust manifold; an exhaust passage reversed portion formed in parallel with the exhaust passage of the exhaust passage forward portion and including exhaust passages communicating with an exhaust passage in an engine holder; and an exhaust passage U-turn portion including an exhaust passage communicating with the exhaust passage of the exhaust passage forward portion and the exhaust passage of the exhaust passage reversed portion. A catalyst for purifying the exhaust is disposed at a junction between the exhaust passages.
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