Re: Finding an Off the Shelf Gas Tank Fuel Sender for 47 Packard

Posted by Wesley Boyer On 2017/3/27 20:41:26

Okay to follow up on Howards question, first I meant to say I'm going to use the 35 - 240 since the windings work better not the 16 - 158. Second I did look at yours and I was thinking that with a 350 ohm pot I could adjust the arm length and get my 0 - 100 ohms, but as I said I'm looking for something that is off the shelf. Third I was thinking that I could adjust the arm for a 0 - 100 ohm swing with the 35- 240 ohm unit. But I had already cut the arm and bent it for the float. The next one I will try using the arm to get the 0 - 100 ohm swing without a resistor added in parallel.

I have run into one problem, if you break the circuit ( wire comes off or you disconnect the power) then Empty does not read correct. This has something to do with the gauge. It also happened with the Packard Sending Unit. The needle will go way pass Empty ( Needle on left hand side of the Dot). but once you drive the gauge back up then Empty reads correct. So I'm looking into running some test and see what happens.

Now if you look at the pictures you will see the arm is almost 4 inches long with a slight bend so it can touch the top of the inside of the tank.
The resistor I use was a Red Violet Brown 270 ohm using that with the 240 ohm Fuel sender comes out to be 127.059 ohms when I put my meter on it it read 130 ohms, close enough.

I know we were looking for 0 - 100 ohms but with the testing 130 looks like it works better. More testing to come.

So just to recap 270 ohm resistor, 4 inch arm and this is for a 17 gallon tank.

P.S. If anybody would like some slightly use fuel senders, let me know. I can't guarantee them, the cost of playing around.

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