The Stovebolt Site Forums The Shop Area Engine Shop carter YF

I have a carter yf 966S that I would like to put on my 1958 apache with a 235 and replace a leaking Rochester B. According to what I have read it should fit ok. Does anyone know the original application for this carburetor and have any experience with this carb?.......good or bad......thanks for your input

Although I haven't installed my yf it's my understanding that it is a much better carb and doesn't suffer from zinc creep or warped flange surfaces such as the Rochester B does. It does have a leather diaphragm which according to Carbking (who used to post here all the time) is prone to drying out if you run any fuel with ethanol in it--if you don't run it on a regular basis. This is supposed to be the king of carbs for that engine. Do a search on Carbking in the "Display Name Search" box using the search function (located between "Active Topics" and "FAQ")and you'll find out all you need to know. Good luck and Merry Christmas!

I have one on my 46. Replaced the Rochester B. It was an instant improvement and has given me no trouble at all. The 966 S can be used on all 1950 and newer Chevy engines according to the sheet carbking posted here some time ago. This is a type 3 meaning it fits a 235 manifold. The type 2 is smaller and fits the 216.

The carter yf was a very versatile carb and was used on just about everything in one congiguration or another.

The YF on my '54 has given me no troubles at all and after sitting for 20 years works great, haven't even put in a rebuild kit yet.

Just make absolutly sure that it is a Chevy application carb. Some Fords used the YF also, with crossover on the part numbers. But the ford version is jetted something like 150-200% fatter than the Chevy version, which will make it run rich. I learned that lesson the hard way. Went to Holleys and never looked back!

According to the Carter books, the manual choke 966S was developed for 1950-56 passenger cars with 235, and 1950-59 trucks with 235. It was replaced by model 2100S.

The 2100S was the version that I found the issue with the Ford version.

I almost choked on a glass of proof ethanol when I read the above. Unless I'm mistaken this 2100S is for a Chevrolet. This here bulletin put my heart back where it belongs but the proof will be in the purr when I shoot some soon to be vaporized and exploded 80 octane down it's throat.

The 2100S came in both Chevy and Ford versions. I have one of each. Got them from a now defunct reman company (Tomco). Both were boxed for Chevy application, but the 2nd one i got turned out to be the Ford application. From the outside, they look idenstical, the differences are internal.

Longbox,

What is the story on using a Holly? I saw a set up on the Langdon site that looked good and reasonable. Is that what you used?

No. That's a completly different animal there. What I used is the single bbl Model 1904 Holley, which was used primarily in Internationals (which is what mine came off of), FoMoCo inline 6, and also '50s-'60s GMCs. The main problem with them is that most are meant for use on a passenger side manifold, so the throttle arm is backwards. That took a little fabrication to correct. But they are very easy to overhaul, and, other than the float, parts are easy to get. In fact, the jet is the same as what is used in current production Holley 2 and 4 bbls, making jet replacement very easy.