I don't know the number for a 1 1/8 shaft, but I had a 13 X 13 OJ 3 blade and switched to a 12.5* pitch Acme 4 blade and it works great with 2000-3000 in ballast and still gives a solid top end for skiing in my DD. If he were to try to run more ballast than that, I would say running a 11.5* might be better. I am still really happy with the 12.5*.
|