Water jet propulsion watercraft

Abstract

A water jet propulsion watercraft includes a hull, an engine, a jet propulsion device, an exhaust channel, and an engine control unit. The engine includes a combustion chamber arranged to combust fuel therein, an exhaust port arranged to discharge exhaust gas after the combustion of the fuel in the combustion chamber, an exhaust valve arranged to open and close the exhaust port, an intake port arranged to pass air and the fuel into the combustion chamber, and an intake valve arranged to open and close the intake port. The jet propulsion device is arranged to be driven by the engine and to draw in water from around the hull and then jet the water. The exhaust channel is connected to the exhaust port of the engine and provides a channel through which the exhaust gas, discharged from the exhaust port, flows. The engine control unit is arranged to control the engine such that at least one location in a path leading from the exhaust channel to the intake port is blocked when the engine is stopped.

Dependencies are inferred from the claim text.