Hi, I have a 2012 Yanmar SC2450 with 20 hours on it. The fuel gauge is terribly inaccurate. I know the tank holds 5.8 gallons. When my gauge reads empty and I fill it while watching the gauge, it reads full after about 2.5 gallons. In the forums, this seems to be a rather common issue. Is there any way to recalibrate the gauge?
If not, I was thinking of wiring a little trimming potentiometer in parallel with the sending unit. I haven't checked it yet, but as I understand it, the float simply varies the amount of resistance between the gauge and ground. In another forum, it said to expect about 68 ohms when the tank is empty. As the tank fills, the resistance gradually decreases to 0 ohms.
Has anyone tried this ? Also I wonder how tough it is to get inside the dashboard behind the gauge?
Thanks,
Paul
If not, I was thinking of wiring a little trimming potentiometer in parallel with the sending unit. I haven't checked it yet, but as I understand it, the float simply varies the amount of resistance between the gauge and ground. In another forum, it said to expect about 68 ohms when the tank is empty. As the tank fills, the resistance gradually decreases to 0 ohms.
Has anyone tried this ? Also I wonder how tough it is to get inside the dashboard behind the gauge?
Thanks,
Paul