The Stovebolt Site Forums The Shop Area Engine Shop Carter type YH carburetors

I promised to post the article on Carter type YH carbs on my website when I found the article, and will still do so when I can update my website. My primary computer had to be replaced last week, and still waiting to get the file transfer software installed on the new one. Will post when I can. In the meantime, here is the article:


Carter type YH (horizontal or side-draft) carburetors

The type YH carburetor is a member of the Carter Y series of single barrel carburetors. The other members of the series are the type YF, YFA (a later revision of the YF), and the YS (sealed a.k.a. underwater). The YS was produced in only two varieties, both for use by the military on their "fording packages". The entire carburetor was sealed.

Carter produced 38 different versions of the YH, in 4 fairly distinct and different generations.Generation 1 consisted of the early Nash Ambassador, Jetfire, the Nash-Healy, and the 6 cylinder Corvette, and was basically produced from 1952 through 1956.

Generation 2 consisted of various marine applications such as Crusader, Dearborn, Gray, etc. from roughly 1956 through 1960.

Generation 3 consisted of more marine applications such as Chrysler, Dearborn, Gray, etc., Latham superchargers, and the most commonly seen, the turbo Corvair from about 1961 through 1964.

Generation 4 consisted of Chrysler marine, the Chrysler Cortez motorhome, and the later turbo Corvairs from 1964 through 1966.The last YH produced was the 1966 turbo Corvair tag number 4141s.

Enthusiasts can have issues when trying to interchange parts among the various generations. In general, generation 1 is unique. Virtually no parts from generations 2, 3, or 4 to include body parts, metering rods, floats, gaskets, etc. may be used on the generation 1 carbs. Virtually ALL of the FLAPS rebuilding kits for the YH did not contain the correct bowl cover gasket for generation 1 carbs; and the orifice of the fuel valve was too large. These two incorrect parts caused flooding of generation 1 carbs which led to all kinds of rumors about the quality of the carburetor. Always easy to blame something one does not understand rather than own one's mistakes.

Many components of generations 2, 3, and 4 may be interchanged, but ALWAYS safest to do so if one consults the Carter Master Parts Catalog for part numbers.The orifice size in the FLAPS kits also caused flooding in all series, and I have been told by a number of shops building carbs for Great Lakes applications that the YH's were banned from the Great Lakes because of fires. THIS IS HEARSAY, I have no proof either way. Again, not the carb's fault if incorrect parts are used.When we were still rebuilding carbs, we rebuilt many of the YH carbs with no problems.For the enthusiast trying to use these carbs in other than O.E. applications, some AFB tuning parts (low-step AFB jets, vacuum piston springs, BUT NOT metering rods) from AFB's may be used in all series of the YH.

Jon.

Thank you Jon. Very hard to tell condition from photos but do you think this is likely to be anything other than a wall ornament? If you look closely they appear to be YH's. I assume Gen 1's. No idea if carbs have guts or just shells?

http://www.ebay.com/itm/132227063884?_trksid=p2060353.m2763.l2649&ssPageName=STRK%3AMEBIDX%3AIT

Allen - difficult to tell, but believe them to be 2066s (correct) carbs.

Having said that:

Manual choke castings (used to be made from unobtanium, don't know if anyone has reproduced them) are MISSING!!!

One body is junk.

Pictures are horrible!

Just my opinion, but looks like: (1) manifold, (2) original linkage, and (3) three parts carbs.

Jon.

Thanks Jon. See I can't pm you. I'm going to call you in the morning to chat about it.