Exhaust system for small watercraft and personal watercraft

A water-jet propulsion personal watercraft, comprising:

• an engine configured to drive a propulsion mechanism of the watercraft;
• an exhaust chamber having a predetermined volume, within which an exhaust gas discharged from the engine flows, the exhaust gas containing water supplied at a position of an exhaust system equipped in the watercraft;
• and
• an exhaust pipe having an upstream end portion in a flow passage of the exhaust gas, which is connected to the exhaust chamber, the exhaust pipe being configured to discharge the exhaust gas from the exhaust chamber,
• wherein one end portion of the exhaust pipe is configured to protrude into the exhaust chamber to a vicinity of a lower end of the exhaust chamber and has an upstream opening end face that opens substantially downward in the exhaust chamber so as to be spaced apart a predetermined distance from an inner surface of the exhaust chamber which is opposed to upstream opening end face.