Dan, I had to put a recess in my wing tanks also. I just made the recess diameter 1/8 inch bigger than I needed, installed the gasket with no sealer then poured a little jeffco tank sealer around the probe mount. I hauled these tanks around in the back of an old van full of fuel for a couple of weeks to test for leaks. Missouri has the worst roads in the nation so I considered this a good test. So far no leaks.
Mike Turner Jackson, Missouri When putting the fuel probe in the tank, do you use gasket sealer or just the gasket. The probe seller man said to use sealer and I did. It was Locktite sealer and it just gooed all over and leaked. Other than that, the fuel gauge is working now. . Daniel R. Heath - Columbia, SC _______________________________________