No backfire, pulled the plugs and figured out it was flooding out. Carb adjustment is a turn and a half out on both screws. I checked compression last night and highest was 160 and lowest was 140. I got compression and reset all my valves. It's definitely timing but I am not backfiring at all. Just cranking..... What could be my next issue? Hmmmmmm???could I be 180 out without backfiring? Does that even happen. Gonna try turning down on my fuel/ air ratio.... interesting.