Patent ID: 6913499

Claim:
An exhaust passage configured to discharge an exhaust gas from an engine for driving a propulsion device of a small watercraft, comprising at least: a first exhaust pipe; a second exhaust pipe connected to the first exhaust pipe; and a connecting structure configured to connect the first exhaust pipe and the second exhaust pipe to each other, the connecting structure including: a first tubular insertion end portion provided at a connecting end portion of the first exhaust pipe so as to protrude toward a connecting end portion of the second exhaust pipe; a second tubular insertion end portion provided at the connecting end portion of the second exhaust pipe so as to accommodate the first tubular insertion end portion of the first exhaust pipe; a ring groove formed on an outer peripheral face of the first insertion end portion so as to extend circumferentially over the entire first insertion end portion; and a seal ring configured to engage in the ring groove such that the seal ring is biased to increase a diameter so as to allow sealing between an outer peripheral face of the seal ring and an inner peripheral face of the second insertion end portion of the second exhaust pipe.