What I have learned over the years in the HVAC trade is that gauges are designed to be most accurate at mid gauge. With that in mind, when I replaced the gas tank, sending unit, and the wire between the tank and gauge, I started with an empty tank, added a measured 9 gallons of gas, adjusted the sending unit arm/float to read 1/2 tank on the gauge. Whatever the high and low readings are will have to do.


1957 Chevrolet 5700 LCF 283 SM420 2 speed rear, 1955 IH 300U T/A, 1978 Corvette 350 auto, 1978 Yamaha DT175, 1999 Harley Davidson Softail Fat Boy