Fuel Sending Unit Magnet?

[Chicago190]

I took my fuel sender out because my gauge was stuck at the 3/4 mark. Everything moves freely so I want to test it out of the water. 2 things:

1. Where does the little square magnet go? Mine came out when I removed the bottom piece and I want to make sure I put it back in correctly. This is the Isspro sender out of a 1996.

2. Silly question, but can I use a bucket of water to test its function, or does it need to be submerged in fuel?

[flipper]

There should be a hole in the foam that the magnet came out of IIRC. As far as testing it, just turn it up side down and back to see if it moves the gauge. I'd use a gas can if possible before water. To check the gauge, touch the two wires from the sender together and it should read full.

[Chicago190]

Thanks, can you confirm the picture is correct?

Also, do the magnet just stick in, or should I use something to hold them in place? I have epoxy, but I don't know if it's safe to use in gasoline. Do I have to worry about what direction the magnets go in? At the moment I am unable to remove the circuit board because the 3 screws holding the top on are a hex size I am missing from my tool box.

[flipper]

It's been a while, but I think I had to pull the board out to get the foam out, then you'll see where it goes. Not sure about the epoxy, but you have to make sure it's okay for fuel if you do use one. i just stuck the magnet in on mine and it was fine.

[JimN]

Try Super Glue. That shouldn't be affected by the gas.

[Chicago190]

Can I pull the board out from the bottom or do I have to remove the 3 screws securing the black plastic top to the metal tube to remove the board and top as 1 piece? I'm worried there are connections at the top of the board that will be damaged if I pull the board out from the bottom.

Thanks again for the assistance.

[flipper]

Yeah, you need to take out the screws on the top to get it apart. Worst case, Skidim

[Chicago190]

It seemed to work alright when I just dropped the magnet down the tube so hopefully it means I can salvage this one.

[mayo93prostar]

I sanded my float and superglued the magnet back in mine last year and it worked for a few months but then started sticking again. I bought a new metal tube type unit from skidim and it works much better other than a slight wiring problem. I recommend buying a new one so you do not have to mess with it again.

[Chicago190]

Thanks for the advice. I've determined my issue wasn't the float sticking, but rather the magnet had come out of the float. It was stuck to the 3/4 mark on the circuit, but the float was still moving freely. I'm going to reassemble it this morning and hope it works again. I've attached a picture of the fuel sending unit disassembled for future reference.