Bad Propnut,

Try a different propnut and then pick out the solutions you like best and go with them. I have had 2 Tru Turn spinners slip and ruin 2 large APC props on my Saito 1.50 4-stroke. Now I am using a Magnum spinner and hope I have better success with it. If anyone has noticed there are prop spinners and nuts with a nurled back and some that don't. I think the star washer idea with a new nut would be the way I would go.

JMHO,

Gibbs