If I leave this outside and it rains its getting a little water in the gas tank and it runs bad until I pump the bottom part of the fuel tank in a bucket and hook the hose back to the carb then it runs fine. Could it get threw in the small hole in the gas cap vent? Im trying to find a leak in the tank also. Im going to pull the tins and fill the tank all the way to the top and maybe I can see something.