| 摘要 |
A propeller 10 for an outboard engine comprises a hub 20 comprising an outer shaft nave 21, an inner shaft nave 22 having a first axial hole 23 coaxial with said outer shaft nave 21, and a plurality of ribs 25 (which may be plate like or arcuate(fig. 4)) located between the inner edge of the outer shaft nave 21 and the outer edge of the inner shaft nave 22. The first axial hole 23 is provided in the inner wall thereof with a plurality of first retaining slots 24. A driving unit 14, which in use is splined to the shaft 17, of an outboard motor, is received in the first axial hole 23 and is provided in the outer periphery thereof with a plurality of second retaining slots 43. Relatively weak (plastics or alloy), rectangular or circular (fig. 7), transmission units 16 are disposed between the inner shaft nave 22 and the driving unit 14 such that they are engaged with the first retaining slots 24 and the second retaining slots 43. The transmission units 16, are easily replaced and the number of transmission units can be selected according to the power to be transmitted.
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