Friend of mine is having setup issues with his 2000 190FS with a Johnson 150. Right now he has a 6" plate set at 3.5 below the pad and turning a 23 renegade. The prop was just done over by Mark so that is good and I set his prop to pad height. The numbers he's telling me aren't adding up. He's seeing 48mph on the GPS and 5400 RPM. That's some crazy high slip numbers on the prop so I'm thinking he's trimming too fast and not letting the prop bite OR there are other issues. I'm thinking a 23 Tempest would be better choice of a prop but his current setup should be in the high 50's. I told him to trim the engine to level, eye ball it and mark a spot on the trim gauge. I said to use that as a reference point to trim to when you make a run. once he trim to that point then start watching his speed and rpms. bump trim up as necessary for his best numbers. Any other tips or advice to get his boat setup properly?