Man these float valves and seats are becoming hard to find. Actually Parts and More doesn't list them for 81-82. Sirius has them but for $57 EACH plus rip off shipping. I won't pay that. MikesXS in Canada is having online gremlins and I can't order anything. Does anyone know the measurements of a fresh O ring on the brass float seat? The push in one, not the threaded style. I measured an old hard shrunk one at 10 x 2 mm. I may solve my problems by replacing the O ring with a viton one if I can find the right size. I'm currently soaking a test O ring in brake fluid to see if it will swell.