RE: prop installation Yamaha 115
You will know when you have the right combinaton of washers when the cotter pin hole is aligned in the center of any one of the slots in the prop nut after the nut is tightened to spec at 40 ft-lbs of torque. I have run Michigan and Yamaha props and they each have different washer configurations. But, the cotter pin hole location is constant.
MDT
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