[Adger Smith]

I've seen a few that have had the bowl screws tightend too tight repeatedly and cause the main body to pull in at the screw thread area. It keeps the gasket from sealing in the middle. Run a "new" very fine toothed flat file over the carb body and then a very fine sanding block to make sure the gasket surface is flat. Don't try to "Mill" it with the file, just take out any small imperfections. I have had to put a few in my mill and make a cleanup cut to get them flat.