Patent ID: 6213828
Filing Date: 2001-04-10
Classification: B63H,F01N,F02B

Abstract:
An exhaust pipe of a personal watercraft, comprising an exhaust pipe having an outlet opening formed on a rear end thereof, the outlet opening being positioned above a water surface and behind a transom board at least during planing of the personal watercraft to discharge an exhaust gas behind the personal watercraft, wherein the exhaust pipe is projected from the transom board rearward, at least a rear portion of a projected portion is curved obliquely downward, and an opening face of the outlet opening provided on the rear end of the exhaust pipe is turned obliquely rearward with respect to the water surface further comprising a connecting structure of the exhaust pipe, including:a flange provided on a front end of the exhaust pipe;a second exhaust pipe provided for leading an exhaust gas discharged from an engine to the transom board in a body of the watercraft, having a flange provided on a rear end of the second exhaust pipe configured for fixing the second exhaust pipe to a transom board and for being connected to the flange of the exhaust pipe, the flanges having fixing through holes formed correspondingly for connecting the flanges to each other;an annular projected portion provided on an end face of one of the flanges for surrounding an exhaust gas passage hole in a central portion;an annular groove is formed on an end face of the other flange for surrounding an exhaust gas passage hole in a central portion to house the projected portion therein; and the flange of the second exhaust pipe and the flange of the exhaust pipe being connected by a fasteners through the fixing through holes in such a manner that the annular projected portion is housed in the annular groove.