Hi Guys, I have a 23' Wellcraft Eclipse 3900 lbs unloaded. Mercruiser 260 hp, Alpha 1, gen 11. It currently has plain Quicksilver stainless 17" P. It is turning 4600 - 4900 rpm depending on the lake I go to ( altitude ) and conditions about 48 mph ( stock speedo, no gps ). After a lot of reading...