Hello,
I have a 2000 model 216 Chaparral, with 5.0EFI Merc, Alpha 1 GenII 1.62 drive. Had this boat for about 6 years now and have always run the boat with a Michigan alum prop 21" pitch. Average numbers were around 4800rpms WOT with 46-47mph GPS. I slalom skied(4 people in boat and gear)...