THE machine is a Kubota Z726X zero turn, I have left the fuel cap off 4 times and run it for a total of about 12 hours with it off. I have pulled the tank a flushed with water but the fuel shut off valve barely drips water out. My thought is to pull the valve to clean it . I have a door panel removal tool that I can probably use to remove it. If I do get it out will it go back in without destroying the tank ? comments ?