Hello everyone, I posted about this a long time ago but can't find the thread anymore. Anyway, I wanted to post a pic to see if any of the Carter guys can help point me in the right direction. It's on a 235 and works great with the exception that high idle doesn't work. I can't find information on the Carters like I have for a Rochester 1B. Is there something missing, is the choke assembled incorrectly? The choke seems to work fine, it starts great but I have to keep pressing the accelerator a bit until it warms up.
From the image you posted it looks ok. You should install so that the bi-metal spring engages the tang you see there and then turn until the little line on the cover lines up with 1 mark to the rich side and tighten the three screws holding the cover. If you do that, the fast idle linkage should be ok. I will tell you I've noticed if the accelerator rod spring is too stiff, sometimes the fast idle mechanism on the YF won't work as it should, however.
~ Jon 1952 1/2 ton with 1959 235 | T5 with 3.07 rear end
That carb does not use a fast idle cam like some others. There a very fine-toothed ratchet assembly in the choke housing that advances the throttle linkage to increase the idle speed when the choke is applied. Inspect the teeth for wear or looseness- - - -it's a flimsy-looking exception to the usual excellent Carter carb design. Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt! There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway Love your enemies and drive 'em nuts!
Interesting! Didn't know about the teeth (arrow picture 4), looks like this? Also included pictures from the 967S spec sheet and Carter YF Features sheet all dated 1953.
"Adding CFM to a truck will only help at engine speeds you don't want to use." "I found there was nothing to gain beyond 400 CFM."
Yes, that's them and as Jerry said they do seem puny for something Carter would have developed. There will occasionally also be a small wire wrapped around the affair...please don't undo it. If you don't use a spring that's too strong, all works mostly ok. If you use a spring like the old screen door spring on your throttle rod, then it is likely it will just pull straight across them. On one very well-used one, I restored the teeth with a micro-file. It seemed to help a bit, but not enough to suggest people start doing that. I just received another well-used one. I may try that trick on it, also.
~ Jon 1952 1/2 ton with 1959 235 | T5 with 3.07 rear end
Pictures of a parts 2101S carburetor. The trip lever and cover were missing. Not much for teeth. More like nubs. Also shows the ends of the spring (second picture, top).
Last edited by buoymaker; 08/18/20216:09 PM.
"Adding CFM to a truck will only help at engine speeds you don't want to use." "I found there was nothing to gain beyond 400 CFM."
Those are the little teeth I restored with a micro-file. As I said, helped a bit. When I get around to working on the one I just received, I'll try to remember to post it. You can see the little spring wire I mentioned on yours...second image at the top. I am always watching for parts carburetors, by the way...
~ Jon 1952 1/2 ton with 1959 235 | T5 with 3.07 rear end
