Cant say my fuel gage has ever stopped working however the speedometer did stop a couple times over the summer. It turned out to be high heat that caused it to stop reading, once the machine cooled down a little it worked fine. I have no idea why yours stopped working but you might try waiting and see if it works again. Do you have a factory service manual to see if there is anything in there about your issue. For what it is worth, I have checked my fuel gage by adding a gallon of gas at a time to see how accurate it was and mine was very close in reading correctly.