US Patent 7344424 Water-jet propulsion personal watercraft

A water-jet propulsion personal watercraft is disclosed, including a multiple-cylinder engine mounted in a body of the watercraft and configured to drive a water jet pump configured to propel the watercraft, and a mechanically driven supercharger configured to supply air taken in from outside to the engine. The engine typically has air-intake ports configured to open toward one side relative to the engine and exhaust ports configured to open toward an opposite side relative to the engine. The supercharger is typically disposed on the one side relative to the engine.