If you want to know what it is, then just raise the timing to 20-22 degrees and let the engine get to operating temperature and then try to see if the hesitation is gone or almost gone.
Hello, my previous post mentioned a correction. I have a Carter AVS. I had also posted pics on post #26.
going to try that later tonight if the weather holds...
the gasket was stuck on the bottom of the air cleaner base. It's there.
You very well could have a vacuum leak.
Are you using an original air cleaner?
Once again cryptic symbols that mean nothing except to the poster. We're turning into a civilization that will/has lost their ability to speak in coherent meaningful sentences.......speak first, while still able to do so....
IMO.....the origional Carter carb, Carter AVS 4968 Auto and Carter AVS 4967 Manual are emission controlled carbs. They have a factory adjusted off idle mixture adjustment device that promotes a slightly lean off idle mixture and also admits additional air flow to the idle transfer circuit during coast down. This off idle system is independent of the normal idle fuel metering circuit as it meters air not fuel. It is very likely that someone removed the origional idle mixture screws and installed ones with a different taper, trying to fix the lean off idle transfer issue. The idle fuel metering circuit is in the primary booster venturii assemblies, which is basically non adjustable. I do not believe its a timing or float level or pump pressure, or vacuum source for the distributor advance or accelerator pump settings. Enriching the primary jets or metering rods may help. Just my thoughts....
Bob, I think you’re kinda wrong. Different taper on idle mix screws?? Maybe longer/shorter of taper (?), don’t remember any difference in any of the carbs I’ve ever seen. Otherwise, you’re correct.
Some of the replacement parts from the on line suppliers show mixture screws with longer or shorter tapers in addition to being the same thread size but different overall lengths......
Yes the mixture screws are sticking out too far.
Wrong......the degree of taper accounts for the sensitivity of the adjustment.....long taper = more range-ability or sensitivity conversely, shorter or blunt taper = a more coarser adjustment.
