Patent ID: 9199710
Filing Date: 2015-12-01
Classification: B63H,F01N,Y02T

Abstract:
1. A water jet propulsion assembly comprising: an engine including a cylinder head including an exhaust port, and a rear surface facing a rear direction of the water jet propulsion assembly; a jet propulsion unit configured to be driven by the engine so as to suck in water from outside of the water jet propulsion assembly and jet the water; a first exhaust pipe attached to a side of the engine, connected to the exhaust port, extending rearward from the exhaust port to a rear end of the engine when the engine is viewed from a side direction, and configured to guide exhaust gas discharged from the engine; an exhaust pipe cooling unit configured to cool the first exhaust pipe; and a catalyst unit connected to the first exhaust pipe, extending in a width direction of the water jet propulsion assembly in a region that is rearward of the rear surface of the engine, and configured to promote reaction of components contained in the exhaust gas.