I just got a 2015 X19 with 175 hpdi. First trip out by myself chinewalk was so bad I couldn’t control it above 60. I could get 63mph and 5600 rpms. If I slowed down to stop chinewalk 58 to 60 it would porpoise. Trimming down to stop the porpoise I could only get 56 to 58 mph. I got home and measured prop to pad and it was 5 3/8” so I raised to 3.5”. Took the boat out for a small club tourney today and with me and my 16 year old son I could only get 57 mph and 5400 rpm and trimmed a hair over half way. Anything over 57 it would start to porpoise again but no chinewalk whatsoever. I could run 59 to 60 with the porpoise but stayed at 5500 rpms. The boat came with a 23m prop. I’ve never had problems with porpoising at higher speeds before. My Skeeter zx225 would only do it when I was slowing down to around 30 or 35. I need set up help on where to go from here please.