A friend of mine was asking me about his fuel sender as the gauge was reading empty with 3 gallons of fuel in the tank. Explained to him how to check the ohms of his sender and the results were 18 full 255 empty then I needed to know if that was what they should be. Due to the covid restrictions I have not been able to have look at it myself. Like the look of that ohms checking box, I just use a 500 ohms potentiometer. Thanks for your help.
The guy is going to see if bending the arm down will solve his problem. I used a pot as I already had a couple. I would recommend to anyone wanting to check the sender or a gauge ohms to buy a Decade box.