Patent ID: 8287324
Filing Date: 2012-10-16
Classification: B63H,F01N,Y02T

Abstract:
1. A water jet propulsion watercraft comprising: a hull including a sealed engine room; an engine installed in the engine room, the engine including a rear surface facing a rear direction of the water jet propulsion watercraft; a jet propulsion unit arranged to be driven by the engine so as to suck in water from around the hull and jet the water; a saddle type seat disposed above the engine room; a first exhaust pipe attached to a side of the engine inside the engine room and arranged to guide exhaust gas discharged from the engine; an exhaust pipe cooling unit arranged to cool the first exhaust pipe; and a catalyst unit connected to the first exhaust pipe, disposed inside the engine room so as to oppose the rear surface of the engine such that at least a portion of the catalyst overlaps with the rear surface of the engine when the engine is viewed from the rear direction of the water jet propulsion watercraft; wherein the engine includes a cylinder head including an exhaust port connected to the first exhaust pipe; and the catalyst unit is disposed at substantially the same height as the exhaust port of the cylinder head.