I have a 1998 Ranger 491VS with a 2006 250hp Yamaha HPDI with a 25P Prop. I am maxing out at about 64mph at 5200-5300 RPM. The boat does not have a jackplate on it. I am looking for setup tips to hopefully get to 70mph. If I add a jackplate, what is the best size for the boat? What would be the best pitch prop for this setup? 3 blade or 4 blade?
Thank you