Gas Gauge

[GaryOR]

1978 Scout II restoration.

New fuel tank and float sending unit.
New continuous voltage regulator attached to fuel/alternator gauge and registering the proper 5v.

Full fuel tank measures 1/2 on gauge. Meter progresses towards empty with driving.

Is there some sort of calibration or other correction to be made so that the gauge reads full when full?

 

[RMScout]

To narrow it down to the sender/float versus gauge disconnect the wires and take an resistance reading with a full tank.

If the reading is off you either have a bad sender, bent float arm, or the wrong sender for that tank.