So this has happened twice to me on the Mondo. We are out on river until the needle is on the E. The next day out I stop to fill the tank and the pump shuts off at 23 gallons. With a 39 gallon tank that was on empty the last time out this is odd right?

Boat gas gages are notoriously incorrect but short by 16 gallons seems weird to me.

My question is can these be calibrated? Or is this a bad gauge?

Thanks everyone and hope your 4th is awesome!