OT430752 03 xb , when I bought the boat I was turning 5800-5900 Tournament loaded with 2 people running 76.8.It has gradually slowed down over a year and a half to 4900 rpms, regardless of what prop I run. I’ve replaced the staor, ignition ecm, flowed and cleaned injectors , new carbon fiber reeds, new pulse fuel pump kit,new bleed lines, cleaned screen in fuel pressure regulator, new electric fuel pump, fuel filter, cleaned vst out, new fuel lines from engine to tank. I’m lost, any ideas?