Hi I am new to the board. I have a 1999 Sea Ray 270 with the 7.4 MFI V8. For some reason the boat feels underpowered. It struggles to come up onto plane with more than 4 people on board and that is with drive all the way down and tabs deployed. The owners manual states that with WOT it should run between 4200 - 4600 RPMs. I dont go past 3600. Any idead what to check. Thanks !! Jim