Hey there "Mach 1" owners. Bought an 84 Mach 1, 20 foot (19' 10") with a Mercury 898 and alpha outdrive. Tuned her all up and she runs great. She struggles to get on plane with two adults and 2 kids in the boat. Mechanic says most likely wrong prop. It has a 14.25" x 19p on it now. I looked up...
