Mike, first of all welcome to the forum. My dealer recommends a product called Sea Foam, it's a fuel conditioner and stabalizer. However they do make Marine versions of fuel conditioner/carb cleaner for carbed boats. I just put some in with a full tank before I went to Tablerock Lake for the National. Check out your local dealer or marina, they should have what you are looking for.
Bill Burns
2004 180 BR 4.3 190 HP
Chicago,IL
"My Little Lady"