I just got done with the carb rebuild and oil. It runs great except now it cant get any gas. it has new fuel line+filter but I'm 90% sure there is a bunch of debris in the tank that is blocking the fuel. I reasoned this because it ran great for 10min and then died out; and now it does not matter if the valve is on or off... no fuel in the line. So I want pull the tank and clean it out. How do they come off? or is this something the dealer should do?