Patent ID: 6568968
Filing Date: 2003-05-27
Classification: B63B,B63H,F02D

Abstract:
A jet-propulsion watercraft comprising:a water jet pump including an outlet port and a steering nozzle, said water jet pump pressurizing and accelerating sucked water and ejecting the water from the outlet port to propel the watercraft as a reaction of the ejecting water; an engine for driving the water jet pump; a steering operation means operating in associated with the steering nozzle of the water jet pump; a steering position sensor for detecting a predetermined steering position of the steering operation means; an engine speed sensor for detecting an engine speed of the engine; a cruising speed calculating means to calculate a cruising speed of the watercraft from the engine speed detected by the engine speed sensor; and an electric control unit, wherein the electric control unit is adapted to increase the engine speed while a result detected by the steering position sensor is the predetermined steering position and the cruising speed calculated by the cruising speed calculating means is within a predetermined speed range.