Patent ID: 6866554

Claim:
A jet propulsion boat comprising: a vessel body constructed of a lower hull including a ship bottom and an upper hull superimposed thereon; a saddle-riding type seat extending in the fore-and-aft direction provided at the center of the upper surface of the upper hull; footrest decks provided on the left and right of the saddle-riding type seat; an engine and an exhaust system provided in an interior of the vessel body; a cooling system for forcing the engine to be cooled by water; a cooling water discharge port from the cooling system, said cooling water discharge port being provided on a rear surface of the vessel body, except for the portion immediately behind the saddle-riding type seat, the cooling water discharge port being a through hole extending from an inside to an outside of the rear surface, the cooling water discharge port having an axis inclined at a fixed angle relative to a line which is orthogonal to the rear surface of the vessel body, wherein the cooling water discharge port is inclined downwardly relative to the footrest decks.