I have a gas 3020. Just rebuilt the carb and it idles fine but when I hit the gas it dies. I decided to check the timing and it was a little off so I reset it with a light but it still does it. If I set the timing by ear it runs great but ends up being 35-40 (guessing) advance instead of the 20 that the book calls for. The centrifugal advance appears to be working fine but I'm not really sure how to check it. The book gives degrees at different rpms measured at the distributor but I don't know how to test. Test bench maybe? Its been converted to electronic ignition but everything else is stock