I bought a high end fuel station for my new and first jet. It uses the standard blue 5 gal tank that is seen in the dozens at any jet meet. I filled up the jug today and it is leaking like crazy at the cap! It has a white foam gasket, I tried loosely tight, grunt hand tight, and pipe wrench tight. If I slosh it around the diesel runs right out. Any suggestions? Because this ain't gonna work. Thanks