I replaced the main check screen with a nos ball check kit. It's kinda a pain to install, but it's also kinda hard to screw it up at the same time. (I had this same issue before I rebuilt the carb.)I'm not really familiar with the carb on these saws but is there a check valve/ball of some sort that might be leaking? Can you get a mirror/borescope in there to see where the gas is coming from?
Yes, I may be able to get a little mirror in there, but I'm fairly certain it's leaking out of the main jet.