| 摘要 |
A boat propulsion device, wherein a suction casing (4) comprising a suction port (4a) opened in a bottom (1b), a suction flow passage (4b) raised aslant to the rear side from the suction port (4a), and a horizontally formed impeller chamber (4c) is disposed at the bottom part of a stern, a delivery casing (10) linked to the suction casing (4) is dipped into water below a waterline at the stern, and axial vanes (8) rotatable in forward and reverse directions are disposed in the impeller chamber (4c) of the suction casing ( 4).
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