Fuel gauge

It will, eventually.

 

There is an adjustable float on top of tank remove the three or so screws and adjust by bending rod as I remember or if you can move float up on rod. But you will also change the empty reading that is you may run out w/ gauge showing good. Only other reason is if tank is turned. That case losses straps and turn so float mechanism is on top . You can’t miss it usually on drivers side has wire running to it

 

I should clarify it could always be the gauge. My guess is you can probably run a while on empty as is. I would leave it alone better this way than risk running out of fuel

 

Mine shows full for about 25 miles then its down to 7/8 of a tank. It's a useless gauge.