This is how I fit my shafts, the outer cassing is fitted in to the hull and fibra glassed in place, the shaft is then lubed and slid in place, the nuts are wound in place at either end, I get them as hand tight as possible so the shaft does not move, then I put on the prop a fraction short of the nut, then I back off the nut from the shaft, locking it on to the prop, this gives you some clearance for the shaft to move.
Now we come to the coupling, turn the nut so again it locks the shaft, put on the coupling, again bring it just short of the nut, back off the nut from the shaftand tighten it onto the coupling, the shaft should now turn and you have your coupling and your prop on very tight, I hope you can under stand all that . ARH
