spun prop on 165 (250) inline six ran numbers on prop 031036 it was a michican 15.75. 17 pitch. 15 spline. the boat is an old winner 18ft, after researching for two day's, I'm thinking about going with the solas amita 19 pitch, diameter is 15.3/10 prop. I know this will reduce my hole shot and rpms, and should add a little to top end. any suggestion on this would be greatly appreciated