The Stovebolt Site Forums The Shop Area Engine Shop Finished rebuild on the Carter yf 2100S

I finished the rebuild on the Carter YF 2100S today, and got it installed on my '51 Suburban. The Carter replaced the manual choke Rochester carb which I have been running on my '53 Powerglide engine with an 848 head.

This carburetor had been sitting in a shed for many years, and had a lot of corrosion and stuck parts. Much thanks to Dave (homer52) who gave me an old YF carb from which I could salvage a bunch of good parts and the advice I received from others here on the Bolt.

Here is a couple of pictures of the rebuild:

rebuilt Carter YF 2100S

Rebuilt accelerator pump assembly

Accelerator pump installed

After the installation and a little gas down the throat, the truck fired right up. It was around 35 degrees outside. I tend to cut the choke off shortly after starting, which I did, and the engine then stumbled a bit on acceleration. After she warmed up, it was smooth going easy peasy. Good acceleration and smooth. Did I say smooth?

I am just amazed at how the truck runs with this Carter carb. WOW. Worth every penny. I'll post some more pics of the installation tomorrow.

Kurt

Congrats on the rebuild! I switched to the Carter a few years ago and was very glad I did. Extremely smooth exceleration. If I can help it, I will never go back to the Rochester B.

Nice Kurt! I don't believe it though. Why don't you send it up here and I'll test it for you for a few years!

Want to do another one? I've got one that I rebuilt and it won't run. I obviously did something wrong. It will run only holding a rag over carb to suck more gas. I know- sounds like it is sucking too much air from somewhere. Stumped on this one in Va. I would gladly pay to have it looked at by someone that knew what he/she was doing. I just can't see the $200 that is required by a core charge to get it rebuilt. Any ideas?

Nice job on the carb.I to have a Carter YF on my 235 and would never run a "B" again.You're right about being smooth.


Pete

Mr Lang,

I love the idea of testing my carb on your truck. Probably the best way to do this would be for you to drive your truck down to North Carolina, and I will test it here for the next few years until we are satisfied with the results.

Kurt

Panhead,

I would be glad to correspond about your carburetor. I think we could get it to work.

Kurt

Hahahahaha!!

And for the curious, here is a picture of the Carter installed in the truck...

Carter YF 2100S installed in truck

Kurt

Looks good

Is that a 216 valve cover?
did you have to move the horn?

The valve cover is original. In 1953 the 235 Powerglide engine still used the two stud cover.

I will have to look at the horn installation in the morning. The engine is out of a '53 car, which had the horns up by the radiator.I think the manifold had the boss for the horn mount, and I may have drilled it for the horn. This was about 40 years ago....


Kurt

Very nice

One thing I've noticed about the YF I'm running is that I've had to change the accelerator pump out, Twice in the last year. I don't know if it's the gas or the rubber they are using in the carb parts.

Where did you get your accelerator pump?

I have heard that the Ethanol in the gas is bad for these carter diaphragms. Supposedly if they stay wet they are all right, but if you don't drive for a while they will crack.

As it happens, I had two to choose from. One came from a Walker kit that I got with the carb, The other came from "The Carburetor Shop"

I put the Walker one in because it looked much newer. The one from the Carburetor shop looked to be NOS. The brass shaft was quite oxidized and it was dusty. Not meaning to disparage the Carburetor Shop kit, by any means. It was the more complete and better kit.

The material of the diaphragms was also somewhat different. My hope is that the newer looking one was made with Ethanol in mind.

We will see, and if it fails, I will put the other one in and give it the test..

Kurt

Great. I am pretty good at these sort of things. Usually. I'm 53 and have been a "tinkering wrench" since around age 10. I feel like I just put something back together wrong, and can't seem to figure out what it is that is incorrect. Maybe with it opened up and in front of me with u on the phone, might just solve this question. They are just not that complicated!!! Thanks for the reply. My cell ph. # 540-520-3418 Best time is @ night since I drive T-T @ night. All night so time is not important. EXample- how late it is. Thanks again. Mark (Panhead)

I have used pumps from the walker kit 15306A, and from CarbKing. Same results.

I use the Walker kit mostly because my local Oreilles Auto carries it on the shelf.
I have stayed with the original metal needle and have not tried the rubber tip needle yet.

I think you right. The key is to drive the truck more.

Mark,

I agree, they are pretty simple. I think that the big thing is making sure all the passages are free and clear. I did pop the brass plug off the side of the cast iron base, near the idle screw, and found a bunch of junk there. Some of the other passages associated with the idle circuit were also plugged. I was very careful to make sure all was clear. High pressure air and a small nozzle are your friends.

There is also a check valve in the accelerator pump cover that will need attention The CarbKing kit had a new ball for this.

It is also easy to assemble the accelerator pump in a way that the metering rod does not fit into the metering rod jet -something to check-

I have plenty of pictures I could email you that may be helpful. We will talk soon.

Kurt

Way to go Kurt. I rebuilt the original Rochester on my '53 but just couldn't get it to run right...always had a bad flat spot. The 235 still had the 216 manifold so I found a 235 manifold with a 2100S attached. Except for a little surface rust the carb looked good inside and out so I thought I would try it without rebuilding it. I got the manifold and carb re-assembled, fired up the engine and it runs MUCH better with the Carter...amazing.

The 2100S has two ports on the bottom of the throttle body. Were you able to find a gasket that cleared both or did the one get covered up? I went ahead and cut an opening for the left one.

Pic1
Pic2

Allan,

I bet you got that good deal for the manifold and YF 2100S that was advertised on Craigs List recently. I tried to jump on it, but being on the opposite coast made it difficult.

I was slightly puzzled by the gaskets. I had two kits for the Carter YF 2100S, and they both had the same gasket. The gasket would cover the notches in the heat riser block, and would cover one of the ports on the bottom of the carb. If you didn't use a gasket, then this port would align with the notch on the heat riser block and the other port would be blocked. I decided this must be intentional, and installed it with the gasket, and all is fine.

Here is a composite picture:

carb to manifold with gasket

And here is a picture showing the gaskets blocking the notches:

Photo of gasket on manifold.

Interesting eh?

Kurt

I have a YF 2100S that will replace the Rochester Monojet that I first put on my rebuilt '61 261. But the Monojet runs so well I haven't done it yet.
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Carter YF 2100S in the kitchen. Thanks, Mrs. Wally!
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Wally,

Your are a lucky man to have Mrs. Wally

Kurt

I did Kurt, apparently I was the first to call on it, but it took the guy forever to get it ready for shipping.

You are probably correct in surmising that the gasket covers the port by design. It's probably some type of vacuum port but I don't know what purpose it serves.