A friend of mine is having carb issues and today he removed it. The plate showed it as a "Ford Model F". It is similar to the NH except the throat is wider and there is no drain on it. The question is if this model carb is rebuildable or are they a poor quality carb? Thanks for any info on this.
Don, I think the model F was an early version of the NH. In my opinion they are good carbs.
They are exactly the same as an NH of the same era. Generally the NH / Model F is considered by most to be the best carburetor Ford ever supplied as original equipment.
The NH carb was produced as an aftermarket carb first. Later, it was adopted to replace the Holley G. The Ford F was later, starting around 1923, when Holley could not make enough NH carbs to keep up with Ford's demand. Ford built the Model F under license from Holley.
Royce just saved me some typing. See Page 411 of Bruce's encyclopedia on disk.
So would the same year NH parts fit the F model ?
Thanks everybody, he is ordering the parts. That's what so great about this forum. Good people with good wisdom and willing to share. Thanks again!
There is no difference, except for the patent plate. Usually, the F carburetors have the side drain. Haven't seen one with a center drain.
This one has no drain. Just the center plug on it.
You have the center drain bowl with the earlier side drain plug installed.
So a drain could be added without changing bowls?
You can add the center style drain. For it to be useful you would have to alter the carbs casting if yours doesn't already have a passage for the center drain
Thanks Bob, I will pass on the information. As always I appreciate your response and time on this. Thx
I think the only alteration needed to change to a center drain would be to add the two notches at the bottom.
Thanks Steve, the next time I get over there I will pass on the wisdom from this thread. Thx !!
Bob, your Ford-F carb on the right has about a 3/16th inch hole drilled a little ways up from the bottom that will allow gas into the carb and some sediments, dirt etc. to settle in the bowl bottom and drain out through the side drain.
It is not necessary to file notches in the bottom to use the carb, but if it is used with a bottom center drain, some debris will not be drained below that side hole, unless the notches are cut.
Steve, my Model T Ford comprehensive Encyclopedia on disk by Bruce McCalley does not have 411 pages in the Encyclopedia section, but on Page 134 it does have a note that I cannot find in his big black book at all.
6200 553A3 Holley “NH”
Off-center fuel drain. Early design used cork float and had a brass vent screw. The air passage was larger and more direct than in the later models. The later design had a “dip” in the air passage, a simple vent hole under the brass nameplate, and a brass float. The Ford “F,” which was built under license from Holley, was introduced in late 1920. The Ford unit had the later venturi design, while the Holley used the “straight-through” type. Both types were used in production.
I have one with T6340C cast above the brass FORD MOTOR CO MODEL-F DETROIT, MICH. tag.
This is still the most information that I have ever found on the Ford-F carb!
I do know that US Naval Academy Professor Jim Cowart tested one and rated it better than the NH. Those test results were not published in his article, as the carb was supposed to be the same as the Holley NH.
As said model F is ford biult NH holley licensed the NH to ford to biuld or so I been told parts interchange but no drain I say you got the wrong bowl
James, The OP carburetor has the later style bowl for a center drain. At the moment he doesn't have a drain at all. He wants to add a center drain and I suggested that he file the two passages at the bottom.
I would never file a carburetor for a center drain! The original side drains are not hard to find. Next, what is an OP carburetor?
He is referring to the Original Poster ... OP ...
That carb is rather rare.
I would not mutilate a good original casting for a drain!
The original poster ask. "So a drain could be added without changing bowls?" Adding those 2 notches will not hurt anything. I agree that finding the correct bowl would be better. I just answered his question. The model F is not as plentiful as an NH but its not rare.