More info, and I do appreciate everyone's input. Boat motor again is a 2.3 ltr 4 cylinder Ford and the outdrive is an omc cobra. Had a full tune up last season, all oils and filters changed, also had a new shifter lever and all cables replaced last year by a local marina. I have owned the boat for about 10 years and like to tackle most maintenance, first time having this issue. Only run pure gas and did change fuel filter this season, also took apart fuel pump and carb to check for any issues. Boat will run fine one day and will act up the next time out. Thanks again guys. Doboy sorry for hijacking your thread. Issues sound similar and I'm getting frustrated.