My prop is a black maxs 13X19 three blade. It does well and tops out about 5400 rpm. I do have a problem on turns with the prop breaking loose and over reving unless I trim down prior to turning. I am going to try a 4 blade Spitfire prop this weekend it should prevent the problem on the turns. I can let u know next week how it worked. The 4 blade should stop your over reving problem. A 12.5X19 would be what u need. The 4 blade runs about 170 and the Black Max is about 95 dollars.