Fuel Tank sender 100/6

[Leew]

I have just changed my fuel tank sender but it appears I have inadvertently bought and installed the sender for a BJ8 rather than for my BN4

However looking at the Moss pictures the sender for my BN4 looks exactly the same as the BJ8

Does anyone know what the difference may be?

Is it that the BJ8 tank is a lot bigger than the BN4 ( 2.6ltr engine vs 3 litre engine ) and therefore the BJ8 and BN4 although looking identical on the outside would be calibrated differently

Ta

 

[healeyblue]

The tanks should be the same size. I would think the difference is in the ohms range it operates within.

 

[CraigC]

Tank size is the same. Resistance of the senders is the same. The location of the terminal on sender is different from what I can tell.

 

[Leew]

Swopped out the sender yesterday for the correct model.....Craig you are right, but it is the float position that is reversed. On the early model car and sender the float faces to the rear of the car, on the BJ8 it faces forward

 

[British_Recovery]

Float has to have room in the lowest part of the tank where the drain plug is. All the six cylinder tanks are the same, so the float position should be the same.
Bob

 

[Leew]

Bob

It's a mystery then...if the resistance is the same, the float faces the same way and it's just the position of the terminal then why did it not work properly in my BN4?

 

[John Turney]

Bob

It's a mystery then...if the resistance is the same, the float faces the same way and it's just the position of the terminal then why did it not work properly in my BN4?

Do you have the sender grounded to the frame? I had to put in a small wire from one of the mounting screws to a screw on the front wall of the boot.

 

[Keoke]

Do you have the sender grounded to the frame? I had to put in a small wire from one of the mounting screws to a screw on the front wall of the boot.

Yep me too John:
I took one look at that poor ground path back through the fuel line and added a short ground wire from the sender directly to the car's structure in the boot.

 

[Keoke]

Swopped out the sender yesterday for the correct model.....Craig you are right, but it is the float position that is reversed. On the early model car and sender the float faces to the rear of the car, on the BJ8 it faces forward

Does it work correctly now?