FL WTB Fuel Sending Unit

[maverickmk]

I have purchased 2 fuel sending units from 2 different vendors and both of the floats are filling up with fuel. Does anyone have sending unit for the in-cab tank with at least a good float? If all else fails I may try to pull the one I have and see if I can get it to dry out and then use that spray flex seal stuff

*Edit: I have an I6 - 250*

[Ironhorse]

I have a good working fuel sending unit pulled from a '70 3/4 ton with 350 V8. Not sure it has the float with it tho. Will check the parts stash later today and get back with you.

[maverickmk]

Originally Posted by Ironhorse

I have a good working fuel sending unit pulled from a '70 3/4 ton with 350 V8. Not sure it has the float with it tho. Will check the parts stash later today and get back with you.

Thanks, I appreciate it.

Not sure if it matters, but I have an I6 - 250.

[chevmn]

Had same issue couple years ago, and apparently this is very common. I ended up finding a plastic (not sure of material) float on ebay which snap right in, and still working. Seems like it was only about $5 or so. Just another option for those who might see this and having same issue. If I recall it was being sold for a Jeep of some sort that used similar float


edit: I believe this is the item

https://www.summitracing.com/parts/o...RoC83QQAvD_BwE

[Ol Blue K20]

Originally Posted by chevmn

Had same issue couple years ago, and apparently this is very common. I ended up finding a plastic (not sure of material) float on ebay which snap right in, and still working. Seems like it was only about $5 or so. Just another option for those who might see this and having same issue. If I recall it was being sold for a Jeep of some sort that used similar float


edit: I believe this is the item

https://www.summitracing.com/parts/o...RoC83QQAvD_BwE

I'm using that plastic one too. It's working great!

[Ironhorse]

Didn't find the sending unit from the '70 3/4 ton with the 350 V8. I do have a sending unit from a 67 GMC with a non-running in-line six. It looks good, moves freely on the float arm, still has the brass float and sock altho it is discolored with age.

Is there any way to test a sending unit out of the stock tank laying on the work bench?

Never have tried doing that before, no idea how. I do have a multi-meter but not sure how to attach the leads for a correct reading.

[maverickmk]

Originally Posted by Ironhorse

Didn't find the sending unit from the '70 3/4 ton with the 350 V8. I do have a sending unit from a 67 GMC with a non-running in-line six. It looks good, moves freely on the float arm, still has the brass float and sock altho it is discolored with age.

Is there any way to test a sending unit out of the stock tank laying on the work bench?

Never have tried doing that before, no idea how. I do have a multi-meter but not sure how to attach the leads for a correct reading.

I appreciate it, but I just ordered one of those floats from Summit. I'll give that a shot and see how it goes.

[chevmn]

I have seen a lot of posts on the Internet regarding this issue with the replacement sending units, and many suggest to retain the old floats from bad sending units, or purchase one of the plastic ones as described. Which reminds me, I am putting a truck together and have a new sending unit. This float actually looks decent, but I am tempted to either submerge it and see how it does or just replace it before I even put it in the tank. The other one I had issues with was very obvious it appeared to have several cracks in it, so no way it would ever work.

[RenoKeene]

I've had the same problem with aftermarket floats. Seems maybe the crap fuel they sell us in conjunction with cheap metal might have something to do with it. I'm running OEM right now but plastic might be the answer (if the crap fuel doesn't eat them too).

[Ironhorse]

Posted a question about checking the sending unit and the way I was doing it is correct. Looks like the sender is fried. Will keep the brass float and the locking ring, scrap the rest. Glad you found what you needed.

Did find a second sending unit and tested it as I was instructed via another thread. It tested good with the ohms changing with range of motion on the float arm. Only issue is looks as if the flare nut fitting was cut off at some point and guess maybe they used a rubber line and hose clamp. Works but not per the General when built. But then a lot of things on these trucks get changed thru the years.

Glad you got your float ordered. If it turn sour for you let me know as I do have an original brass float that needs a home, LOL.