I'm gonna disagree with Lynn. Two gaskets should do the trick. You need one between the tank flange and the gauge and the second between the gauge and the lens. Since fuel shouldn't be able to get past the lens, no gasket is required between the lens and the plate. (Fuel passes through the gauge to the lens, necessitating the second gasket.
Key to all this working is sealed nut inserts in the tank flange. If fuel can get to the screws then it can follow the screws up to the heads and out. A third gasket will not prevent this as there is still metal to metal between the screw heads and the plate. The bottom of the threaded insert must be sealed. Putting fuel-lub on the threads of the screws may help if they do not seal completely. John Cooper, A&P Skyport Services PO Box 249 4996 Delaware Tnpk Rensselaerville, NY 12147 518 797-3064 Fax 518 797-3865 www.skyportservices.net
