WATER JET PROPULSION APPARATUS

摘要

To enable a thrust force acting on an impeller shaft to be received by a sufficiently large bearing member. A water jet propulsion apparatus is provided with a stator 31 forming a channel 18, an impeller 32 rotatably disposed in the stator 31, and an impeller shaft 35 rotatably supported by bearing members 61 and 62 provided in front and rear parts of a bearing 33 disposed in the stator and coupled to the rear part of the impeller 32, and is characterized in that the bearing member 62 on the rear side which receives a thrust force of the impeller shaft 35 is larger than the bearing member 61 on the front side. Both of the bearing members 61 and 62 on the front and rear sides are assembled to the bearing 33 from the rear.