I gave up on my fuel level gauge, and simply use an ohmmeter to determine fuel level. I have a 17 gallon tank with a 30 ohm float. Divide 17 by 30, and that equals .566 ohms per gallon. So if the meter reads 10 ohms, I multiply that by .566 and I know I have 5.6 gallons of fuel in the tank. You can easily calculate fuel mileage even on short trips. I keep a free HF meter connected to the float, and just check it as needed. 15 ohms is a half a tank.