The Stovebolt Site Forums The Shop Area Engine Shop Carter YF

I need some information. I have a Carter YF and it appears the model number stamped on the base is 789 SA. It has been converted to a manual choke. Does anyone know where this carburetor was originally used and will it work on a 235? The current Rochester is in sad need of replacement.
Thanks for any input.
Pete

Not original equipment. Replacement unit specifically calibrated for Chevrolet 235. One of the finest carbs ever produced for the 235.

Jon.

Thanks Jon, I'm glad to hear that the carburetor wasn't misrepresented. With that information I will bolt it on tonight and see if it goes. Do I need to block off the internal vaccuum channel that used to provide air suction into the choke, or can I just cap off the external air tube connection?
Pete

Cannot answer last question without knowing how the conversion was done.

Jon.

Jon, the choke housing is still there but the black cap and internal mechanism was removed and a replacement cap installed with a shaft in it that runs through to engage the choke plate in the carburetor throat.

It's not as neat as a carburetor top designed for a manual choke but it looks like it will work. I would say it is a kit manufactured to provide a method to install a cheap fix when the automatic choke malfunctioned.

There is a threaded connection that goes into the old choke housing that was open so I have a temporary plug in it now. I figured this was where a heat tube would connect from a manifold oven or something. I thought this would be an open vaccuum leak that could affect carburetor performance. Could also take the top off the carburetor and plug up the passage that runs up through the casting.

I put the carburetor on last night so will see if it runs today. It must be designed as a replacement for the Rochester, as you said, because all the lines hooked up without modification and the throttle rod was the same location. Thanks for sharing your knowledge - it makes these old trucks more enjoyable for the rest of us and we appreciate it. --- Pete

Pete - just capping the housing where the heat line screws on (as you have done) should be sufficient.

Jon.

Hey Pete, I was wondering if yu got your carb working. I have a YF and tried putting it on a 235 and had nothing but problems. I couldn't get it to idle, and it kept fouling my plugs. Never could get it to lean down. I was just wondering if you had any luck. I also heard they were the best carbs you could put on a 235? I'm baffled.

Shredder,
I got it on and it started right up. I am still working on getting it dialed in. The rochester had more internal return spring than the carter so I need to put a little more spring on the throttle rod to get it to let off quickly.

I can't see where there is a lot of adjustment except the idle screw. There may be something internal to lean it out if I need to -- don't know yet. Was yours rebuilt before you put it on?Mine is a lot smoother at low end now with no hesitation. Will let you know after I have had a chance to work on it. Making a living has been getting in the way of working on it.
Pete

Hey Pete, I'm glad to hear that you got it up and running.

My carb is rebuilt. I took it to a shop that works on old cars and the gentelman that owns the shop said he wouldn't work on it because he has had nothing but trouble with rebuilt Carters. Hey said they get warped and don't work properly. I explained my problem to him and he siad he bet it was my carb and not my mechanical skills. I think I am going to go to NAPA and get a rebuild kit, go thru it myself and try it again.

I know what your saying about your job getting in the way of working on your truck. I guess it makes it that much more enjoyable when you do get the time to work on your truck. I know it does for me.

All this Rochester leaking is scary I will be rebuilding mine but I fear the most from what I have heard.....

Can someone....maybe CarbKing..... tell me which model of the Carter YF would be properly jetted and of sufficient CFM to fit on a 1958 261 Chev
..and will the regular size Chev oil bath air filter fit on the Carter.....

...and any suggestion where I would find one...such as what make and model of vehicle would have had them stock so I can go hunting in junk yards.....

Thanks for your help...

Bob C.