The fastest i've ever been is 98.7 back in 2005,boat developed a bad miss and wouldn't run,boat has set for 5 years till i got it fixed couple months ago,tank cleaned all hoses and filters replaced along with mass air temp sender(the problem) I've been out in it 2 times since getting it fixed and runs fine was going to try to break 100 but 70 now seems like 90 did 5 years ago! So all the 2005 motor parts ( everything except powerhead)have less than 10 hours on them!! Boat should run 102-103 with good driver. Prop shaft is a fat shaft.