Recent content by Abcmatthew

Thanks for the reply, gps is my speedo, I am picking up the boat today to see if raising motor a bolt hole will help? I will take some pictures also and post. I have to get this mystery solved

Recently re powered my 2007 208 with a 3.3 f250. I am having a hard time getting the prop figured out. Grady's test with the same rig spun a 17 pitch and Acheived 53 mph. I have tried a 17 , 19 and now a 21 pitch which is putting me right at 5800 rpms but I am barley breaking 40mph ? My bottom...