I have a 2021 Triton 206 Fish Hunter(walleye boat) with a Mercury proxs 250 fs. Tempest 23 prop. Hydraulic jackplate and no kicker. My first few months with the boat I was able to do between 59-62 mph. I did not notice what my rpms were. I had best speed with jackplate at 7. Recently best I can reach is 54-56 and rpms max at 5200( too low). Also I need to have the jackplate at 1. Any higher and I lose more speed. Is this setup very weight sensitive to lose that much speed? I also heard of merc having issue with not going full throttle. Any help is appreciated. I am 3 hours from my dealer and its tournament season.