| 摘要 |
PURPOSE:To prevent barnacles and the like from sticking in a passage without grounding a hull while it is not used by rotating a jet unit with a rotating means while the hull is moored to locate a water suction port above the draft line. CONSTITUTION:A jet unit 3 is liftably constituted with a bracket 4, a hydraulic cylinder 50, a lifting arm 5 and the like in a recess la. The lifting arm 5 is rotated around a pin 5a by the action of the hydraulic cylinder 50 via a rib 51, and the jet unit 3 is lifted via a connecting member 55. An impeller shaft 2 is folded centering on a connecting shaft 47a at the portion of a universal joint 46 serving as a connection section to a transmission shaft 13 in conjunction with the rise. The lower end section of a water guide section 31 is located above the draft line by this rise, and no water enters a passage 37. Barnacles and the like can be surely prevented from sticking in the passage 37 during mooring. |
