I have a 2008 Smokercraft 18 ft Pro-Mag with 150 Optimax. I have been following this site for awhile and there is a lot of good insight here.
I bought the boat with a 3 blade 19 pitch prop that ran up to WOT rpm but he boat ran at 4 mph or 47.2 GPS mpr well but porpoises a lot a mid range...