Fuel tank sending unit rebuild service

BrianT said

I'm running the Spectra unit in mine and I must have gotten lucky. This weekend it was reading 1/8th tank, so I stopped and filled up. It took 15 gallons to fill an 18 gallon tank and the fuel gauge moved to full when I was done. I don't trust it's accuracy below 1/4 tank so I try to keep it filled when it gets that low.

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First of all, you have an 18 gallon tank in name only. If you put 15 gallons in the tank, you were definitely running on EMPTY. I put 3 gallons in a completely empty 18-gallon Spectra tank, and the float did not move and the suction tube was not covered. Just after 3 gallons, the float starts to move and the suction tube starts to get submerged.