I have a 02 champion 206 with a 08 Merc 250 xs. My prop to pad has been anywhere from 3.5-2.5. I can’t get over 5500/65mph. I’ve been running a tempest 25p 3 blade. I just put on a 24p trophy plus 4blade, ran it at 3, and 2 3/4 prop to pad and nothing changed. Still 5500/65. The only thing I noticed different with the 4 blade is almost felt like I was hitting a rev limiter at 5500, and doesn’t have any power loading on trailer with 4 blade although hole shot is excellent. All speed is gps and the rpm is through a smart craft gauge.