Need some advice...how much does timing effect deceleration exhaust burps
? I know that too lean a mixture is a cause of exhaust burps. I open the mixture screw and that helped maybe I need to go more ( I hate to have the screw fall out while on the road)... Should I also re-time the engine? Perhaps it's too advanced? I have the ball on the pointer but I can also time with a vacuum gauge?

Thanks in advance, Steve