I had the same problem when I first hooked mine up to my 250SHO last year. I was very frustrated because there are no instructions out there. I can’t remember exactly, but when you are in one of the sub menus selecting what to put in the gauge cluster you have to hit the check mark button and it brings you to a hidden menu. I went from only being able to see RPM and temp to seeing hours, rpm, temp, oil pressure, fuel consumption and maybe something else I’m forgetting.