Abstract: A second hull adaptor is provided for use with a jet powered personal water craft. The second hull provides for the craft to be more buoyant and stable even when used by full-sized adults. The second hull has a water induction channel which specifically directs the movement of water through the jet pump thereby increasing speed. It further has angled sides and diverging chines for increased speed and improved handling. An adjustable sleeve surrounds the water exhaust nozzle allowing for further adaption of the craft to water conditions or for specific riding styles. The sleeve may be adjusted so as to be flush with the rear transom to a position fully extend beyond the transom as desired.