What is the cause of backfire when trying to start my blaster. Can't seem to get it going sounds like it wants to start but no start. I checked spark which is kinda weak looking .checked compression 120 open throttle new Chinese carb replacement no tors. My plug sometimes comes out wet sometimes not tryed to reject but cannot fit regular jets and no numbers on jets also. Anything I missed please lmk thanks and Aloha pono kapu......
