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Never seen or heard of any such thing. The in-cab fuel tank sender (D7TZ-9275-G replaced C1TZ-9275-K) is the same 1961/66 F100/700 & 1967/77 F100/750.
I've owned 3 trucks with this sender and I sold dozens of these sending units when I was a parts guy. Not one had a rubber boot on it. And I never heard a noise from the float either.
Pic: Where is the boot? No see um.
Perhaps I am mistaken that these floats had rubber caps on them. I have seen some that do. My float has a shiny spot where it rubs on one of the ribs in the tank when it is at a certain level. Very annoying constant scraping sound. I'm sorry you have never hesrd of this problem. If you pull the sending unit from your tank, and bend the float arm, I'm sure you could enjoy it as well!
Ironically I was watching a YouTube video and in it they discovered the rubber boot on their 70 model F100. They asked the guys at parts depot and they said they could only find it on the f700’s. Weird.
This part number is not listed in any Ford truck parts catalog. No Ford dealer or obsolete parts vendor has any, none on ebay either.
I am not familiar with this 'fix' even though I worked the back (shop) parts counter for most of my 35 years (1962/97) as a parts guy.
The 'fix' covers all 1965/68 trucks with in-cab fuel tanks, which is odd when you consider the sending unit was the same 1961/76 (C1TZ-9275-K), being replaced in 1977 (D7TZ-9275-G).
The 18 gallon in-cab tank was the same 1961/69 (C1TZ-9002-J). It was replaced in 1970 with the 19 1/2 gallon in-cab tank (D0TZ-9002-A).
i came up with 2 different length floats from lmc, shorter one works good. i guess witch ever china decided to send that day.
if i remember, i bought a separate float for the original sender and it was the long one, then bought a complete sender kit and it had a shorter float.
it leaked from day one around the uncentered o ring. what a shocker. used the short one with the old factory one. before i knew how bad china crap is
