Also, be VERY careful bending the arm as it is brittle. I wasn't willing to risk it. In my case the float rubbed against the side of the tank. I bent it just enough to clear the side. I filled an empty gas container a gallon at a time, marked the container and then pumped in a gallon at a time (used old electric fuel pump) while watching the fuel gauge. I also measured the resistance of the fuel sender. My gauge read half full with 15 gallons. There are a couple of threads covering this.
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