I JUST BOUGHT A 98 LARSON W/115 JOHNSON O/B, THE FUEL GAUGE WILL READ FULL WHEN YOU FILL THE TANK AS THE BOAT RUNS THE GAUGE WILL DROP LIKE IT SHOULD UNTIL THE GAUGE READS 3/4 OF A TANK LEFT. I FOUND OUT THE HARD WAY THAT THE FUEL TANK WAS ACTUALLY EMPTY. ANY IDEAS ON HOW TO FIX THIS WOULD BE APPRECIATED