Originally Posted by Huckleberry
Perhaps non-functioning accelerator pump? Check if gasoline sprayed into carb throat when accelerating (engine off).
Yes, agree. Push on throttle while looking down carb throat. See if it squirts gas.
Don't think vacuum advance would totally keep motor from revving at all.
"Get it to shop" says you are not a DIY person? The stovebolt is for beginners/DIY'ers and all else. Give it a shot.
Congrats on rebuilding carb. I screwed up several at first.

You could have:
1. Forgot a part.
2. Wrong ball in a hole
3. Not cleaned it good enough
4. Messed up the needle and seat assembly
5. Not done the float level or the float drop properly
6. Wrong gasket or blocked a hole with a gasket
7. Have a warped body

I have done all these things and more. Unless you are in a hurry. Do it over again after studying the instructions and the internet and asking Stovebolt. Your problem can easily be a carb problem. The squirt test will help identify. What carb do you have? Those 1bbl are easier than most and fun to learn on. Many good carb guys on here. Do it again. On a good day with plenty of light and a clean work area.

Many of us are older than you, so, to me you are young.

The advance is operated by manifold vacuum. You can check it but sucking on the hose to see it move the lever..........maybe. But like I said it would not keep motor from revving to higher than idle.

Understand you are looking for vacuum leak. Worthwhile.

Right is right, even if everyone is against it, and wrong is wrong, even if everyone is for it. - William Penn