Patent ID: 8070538

Claim:
A jet pump of a personal watercraft comprising: a pump casing provided with a fairing vane part including a plurality of fairing vanes, and an impeller placement part for disposing an impeller in front of the plurality of fairing vanes, each of the plurality of fairing vanes having a front portion directed towards the impeller; wherein the front portion of each of the fairing vanes has two attack angles with respect to an axis of the pump casing as viewed in a longitudinal sectional view, the two attack angles being a fairing vane attack angle and a front end attack angle, the front end attack angle being larger than the fairing vane attack angle, the two attack angles gradually changing at a front end of the fairing vane from the front end attack angle to the fairing vane attack angle; and wherein the front end attack angle is on an outer peripheral portion of each fairing vane and extends from a front end of each fairing vane at a predetermined angle in a rearward direction of the pump casing, away from the impeller, by a predetermined amount to a deepest point to form a cut portion having a semicircular shape and a radial dimension that is half of a radial dimension of the fairing vanes.