Patent ID: 6478644
Filing Date: 2002-11-12
Classification: B63H,F01N,F01P,Y02T

Abstract:
A watercraft comprising an internal combustion engine having at least one exhaust port and an output shaft, a jet propulsion device driven by the engine output shaft, an exhaust system extending between the engine exhaust port and an exhaust discharge outlet to discharge exhaust gases from the watercraft, an upwardly spraying discharge nozzle formed separate from the jet propulsion device, a sensor configured to detect an operational parameter of the engine, and a water cooling system including a water jacket and a water supply system receiving water from the jet propulsion unit and communicating with both the water jacket and the discharge nozzle, said water supply system comprising a flow regulator which is disposed upstream of the discharge nozzle and the water jacket and is configured to supply water from the jet propulsion unit to both the water jacket and to the discharge nozzle in accordance with an output of the sensor.