This fuel level indicator mounts in the fuel tank wall and provides a visual reading of the remaining fuel volume. It uses a float arm that moves with the fuel surface, rotating a resistive element that changes the signal sent to the gauge on the operator display. A failed indicator typically shows a stuck or erratic reading, which can lead to unexpected fuel starvation. The original assembly matches the tank's mounting flange geometry and the resistive sweep range that the gauge expects, so no calibration adjustment is needed after replacement. When installing, ensure the sealing gasket is replaced and the retaining ring is tightened evenly to prevent leaks.