Older small engines....

Once you get that carb cleaned and rebuilt, if it wont idle, dont tear your hair out looking for why,cause Ill tell you a secret;there is/may be, at the end of that brass tube that pokes down through the float, a very tiny orifice that serves as the idle jet. If it is plugged and you didnt know that it was there you might never see it.Dont ask me how I know. If you buy a kit that tube is usually included. If not you will have to hunt for it(the hole).You may need a magnifying glass. The hole is less than maybe .020 inch. Not all Briggs have that orifice, just the bigger(like auger motors) ones. Try not to enlarge it. I use number drills.......But if it idles the passage/orifice is working.Best of luck to you.