Patent ID: 8845371
Filing Date: 2014-09-30
Classification: B63H,F01N,Y02T

Abstract:
1. A water jet propulsion watercraft comprising: a hull; an engine including an exhaust port, the engine housed inside the hull; a jet propulsion unit arranged to be driven by the engine and configured to draw in water from around the hull and jet the water out; a first exhaust pipe fixed to the engine and connected to the exhaust port; a damper section configured to reduce a vibration from the engine; a catalytic converter unit connected to the first exhaust pipe and attached to the engine through the damper section; a second exhaust pipe including a first flexible pipe connected to the catalytic converter unit; a water lock fixed to the hull and connected to the second exhaust pipe a bolt to attach the catalytic converter unit to the engine; and a support member fixed to the engine; wherein the engine supports the catalytic converter unit through the damper section and the support member; the damper section includes an elastic member in which a through hole is provided; the catalytic converter unit includes a mounting hole in which the elastic member is installed; the bolt is arranged to pass through the through hole of the elastic member and is fastened to the support member; the catalytic converter unit includes a catalyst member and a pipe body housing the catalyst member; and an outer surface of the pipe body includes a recessed section positioned above the mounting hole.