it's the oil that is the problem. oil soaked wood is not strong and bends easily. you will probably have to repair that. i would replace all the fuel lines. however, you say you see bubbles in your fuel line. let a piece of line stick that goes to the needle so you can see it. if the fuel has bubbles coming in, it is behind the needle valve. if you see no bubbles coming in but there are bubbles coming out, guess what! you suffer from leaky needle valve syndrome. however if you do see bubbles coming into the needle and you have replaced all the fuel lines, (including the clunk line) than you have a leaky tank. process of elimination guys.