Wema sending unit fuel tank fix

[Blue_Heron]

Originally Posted by McGillicuddy

Dave, I think Big John's referring to the screw hole alignment. The holes on the flange are not equidistant, so they will require lining up with the under ring. IIRC, the screw pattern is not an equilateral pentagon although it appears to be.

Gillie. Dude,

Maybe my solution is so simple it's hard to understand. I know the screw pattern isn't symmetrical. That's so the float arm will point in the right direction and won't hit the side of the tank, or a baffle. But the Wema unit doesn't have a float arm and it doesn't care if it lines up with the original screw pattern.

If you rotate it a few degrees either way, so it no longer lines up with the wallered out (southern technical term) original holes, and drill and tap nice new holes, the flange and gasket will cover the old holes, and the nifty backup ring becomes unnecessary. This is what I did with both of the tanks in my Seafari, and they don't leak.