check you float levels if it is flooding out, they maybe too high. You maybe experiencing vapor lock. Make sure your fuel lines are routed away from high temperature items. Also confirm you are getting spark at the plugs. Points might be sticking. Lot's of little things. Confirm it is getting gas. You say it maybe flooding. Ok, now we need to confirm it is getting spark. Start tracing things back from the spark plug until you find the culprit.