We played hell with my wife's pontoon with a Suzuki 2 stroke outboard. Had to take it to the dealer finally and had all the fuel lines replaced, fuel pump and all three carbs rebuilt. Dealer recommended that we use an ethanol absorbing product called Startron. In Michigan I have had to run ethanol fuel in my Scarab for over three years now. Knock on wood that I have not had a problem. I do keep Stabil in the fuel year round though. Maybe that is helping me out.