MTS Plastic Fuel Tank

[JWestfall]

I recently installed the MTS plastic fuel tank in my 72 Wagoneer. It is advertised as 21 gallons like the stock tank, but mine only holds about 18 and the fuel gauge only shows a little 3/4 full. I have filled it to the point where I can see standing gas in the filler tube. Has anyone else experience this? Thanks

[Moosehead]

Yes, you describe my experience exactly. I had to place a few foam pucks around the tank to keep it from moving around.

[tgreese]

Fuel gauge reads the level in the tank, not its capacity. The tank would have to be 3/4 as tall as the original to measure 3/4 of a tank at full, assuming it correctly reads empty. You have both the tanks and could measure.

Did you use a new sender? Quality control on such parts is not great. I would adjust the sender arm so that it reads empty to full over the full depth of the tank.

One option would be to have your tank cleaned and coated by a shop, usually a radiator shop. Or find a used tank that you can use. Otherwise, MTS is pretty much the only option.