Replacing the tank is not fun. BEfore you go there I would check your fuel pressure at the carb first. I went through many different things before figuring out I had a fuel pressure problem (too much). My pressure reading was over 7 lbs and was pushing fuel through the carb to the point I could see it dripping into the throat. This could also happen if you have dirt trapped within....the top of these carbs are very easy to take off and see if dirt is the issue.