| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a water jet propulsion boat improving durability of a crankshaft while arranging a center of gravity rearward. Ž<P>SOLUTION: This water jet propulsion boat 1 includes an auxiliary machine room 63 arranged at the rear of a crankcase 54, auxiliary machines (a rotor unit 65, a stator unit 70 and the like) stored inside of the auxiliary machine room 63, the crankshaft 62 having a rear stored inside of the auxiliary machine room 63 and a rear end projecting outward of the auxiliary machine room 63, and a drive shaft 83 connected to the rear end of the crankshaft 62 and rotated together with the crankshaft 62. The crankshaft 62 is provided with a flange 62a for attaching at least one of the auxiliary machines (the rotor unit 65 and the like) to the crankshaft 62. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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