New Gas Tank Sending Unit Leaks

69KillerFish said
Yeah, I did. I am starting to get that stupid feeling....

Well, don't, you ain't alone, lol. For some reason those new lock rings don't put enough pressure on the sending unit/seal.

If you have the old one, I hope, put it in. Make sure and tap the ring so those little tangs seat in the slots.

By the way, try and use something brass if you can, sparks baaad.