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Float material
#1
I have to adjust my new sending unit soon, when my gas tank is half full, it reads 3/4, so I am a quarter tank off. I installed the new sending unit with the plastic float it came with. Is that better, or should I use the original brass float? I know the old float does not leak. Any opinions?
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#2
(04-13-2018, 07:39 AM)Omie01 Wrote: I have to adjust my new sending unit soon, when my gas tank is half full, it reads 3/4, so I am a quarter tank off. I installed the new sending unit with the plastic float it came with. Is that better, or should I use the original brass float? I know the old float does not leak. Any opinions?

 Omie01, I may be able to offer something on this, having done this dance last summer. I did post on my replacing the tank, sending unit and fuel lines, but unfortunately my ineptness with computers, prevents me from linking it. (I'll have to get my Grandson to show me how!)
In my case, I ran into a problem with an incorrectly made sending unit from Spectra Premium I bought from RockAuto. The exit tube was facing the wrong way. I returned it and exchange it for a Doorman RB 692-222. It was a pretty good replica of the original with brass float and all stainless construction and yes, the exit tube was facing the correct way!! As for which float to use, I have really no idea which is best, others may be able to input on that.
As I had an empty gas tank, it was easy to calibrate it. The new tank is a Spectra Premium and a very good piece it is too. It is 20 US gallons so I put 5 US gallons in. With the car level, my gauge showed only 1/8th tank, should be 1/4. What I did was to jack up the left side of the car with 2 jacks to keep it even. It will need to be pretty high as when you remove the sending unit, no gas leaks out. It is now a simple bend of the float arm. IF I remember and got this right, I needed to bend it downward just a little resulting in a higher reading on the gauge. In your case I think you need to go the opposite way, bend it up a tad. It's a trial-and-error thing. Just be VERY careful working under a jacked up car!!
Hope that helps,
Geoff.
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#3
Last year received one from Ohio Mustang and it was a very good quality unit very similar to original w brass float.
(I needed to destroy it for my EFI needs, but thats another story)
But if you receive a unit that is similar in quality as this one and still have the previous one that was giving correct readings.
Then, you simply have to compare the angles of both floats and adjust/bend the arm to get the same readings.

I'm sure there must be some angles/specs listed somewhere or someone ( David to name one ) having an original that could help define the correct angles.

That's assuming the rheostat of the replacement unit is having the same ohms range. Because if the range is different, no matter the bending, you will never get the correct interpretation at the gauge.

https://www.youtube.com/watch?v=z4c8_NnBW4s&frags=wn

73 modified Grandé 351C. Almost done. 
71 429CJ. In progress
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#4
(04-13-2018, 09:55 AM)Fabrice Wrote: Last year received one from Ohio Mustang and it was a very good quality unit very similar to original w brass float.
(I needed to destroy it for my EFI needs, but thats another story)
But if you receive a unit that is similar in quality as this one and still have the previous one that was giving correct readings.
Then, you simply have to compare the angles of both floats and adjust/bend the arm to get the same readings.

I'm sure there must be some angles/specs listed somewhere or someone ( David to name one ) having an original that could help define the correct angles.

That's assuming the rheostat of the replacement unit is having the same ohms range. Because if the range is different, no matter the bending, you will never get the correct interpretation at the gauge.

https://www.youtube.com/watch?v=z4c8_NnBW4s&frags=wn

Ah yes, the Ohms reading. The Doorman I bought was pretty close to original spec as I recall. It didn't take much to adjust it for the 1/4 tank reading I was after. After all, it's the bottom 1/4 that's important!!
[+] 1 user Likes Stanglover's post
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#5
Omie01, I've heard from some of my friends about problems with the plastic floats.  There are also some Chinese brass floats that are very thin and leak due to poor soldering and same on the Chinese plastic versions. A Chevy buddy of mine is a member on the Tri-Five Forum (55-56-57) and the Ford float is what they suggest using on their fuel sender units. Looks like we are not the only ones dealing with inferior "Import" parts.
Most of the ones offered through Summit, Scott Drake, and a lot of the Mustang parts vendors are the genuine Ford unit (COAZ-9202-B) and much cheaper than from the dealer. If the need for just the float ever arises, I would check with Don @ OMS to see if he stocks this float and if it is the genuine Ford unit. Without knowing where you purchased your sending unit, if you find that it will not adjust to show the proper fuel level, I would.......Call Don!  Lol  
He has a pretty good handle on what is junk and what isn't on repo parts.

Steve

No Officer...I really don't know how fast I was going, my speedometer stopped at 140!
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#6
@StangLover
[ it's the bottom 1/4 that's important!!]

Very true! In fact I doubted many times that my US cars came with the "fuel tank" option Smile

73 modified Grandé 351C. Almost done. 
71 429CJ. In progress
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#7
(04-13-2018, 10:55 AM)Fabrice Wrote: @StangLover
[ it's the bottom 1/4 that's important!!]

Very true! In fact I doubted many times that my US cars came with the "fuel tank" option Smile

 Yeah, if fuel is coming out of the filler neck, it's full regardless what the "gauge" says. It's when it's about to run out that's really  important!
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#8
(04-13-2018, 10:36 AM)secluff Wrote: Omie01, I've heard from some of my friends about problems with the plastic floats.  There are also some Chinese brass floats that are very thin and leak due to poor soldering and same on the Chinese plastic versions. A Chevy buddy of mine is a member on the Tri-Five Forum (55-56-57) and the Ford float is what they suggest using on their fuel sender units. Looks like we are not the only ones dealing with inferior "Import" parts.
Most of the ones offered through Summit, Scott Drake, and a lot of the Mustang parts vendors are the genuine Ford unit (COAZ-9202-B) and much cheaper than from the dealer. If the need for just the float ever arises, I would check with Don @ OMS to see if he stocks this float and if it is the genuine Ford unit. Without knowing where you purchased your sending unit, if you find that it will not adjust to show the proper fuel level, I would.......Call Don!  Lol  
He has a pretty good handle on what is junk and what isn't on repo parts.

 Steve, While I can't be 100% sure, the Doorman I got from RockAuto, list the country of origin as United States (for import into Canada). The one thing I did look at carefully was the float, which appeared to be pretty solid and good. However I would agree with you, if it's unknown quality, get one that you know is good.
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#9
I just pulled the sending unit out this weekend, not only did the stem filter fall off in the tank, but the plastic float has started taking on gas. It was about a tenth or more of the way full!! I got the one through napa, which is the one with the inlet facing the wrong way and returned it. I ordered the most expensive one that NPD had which is the Scott Drake unit with a brass float. Hopefully this is a good unit!!
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#10
runninpony 
I don't know if Carpenter makes a brass float but I'd stay away from Drake parts!
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