RE: Fuel spitter thru muffler! help
It really think you had it flooded. The excess fuel coming out of the exhaust is the sign. The bubles from you glow plug indicate that the plug is either not secured tightly or the insulation is bad and you are loosing compression thrugh the glog plug. If my glow engine floods I will remove the glow plg and turn it upside down and rotate the propp to get the excess fuel out. Or tip it sideways such that the exhaust port is facing down and rotate the prop forcing the excess fuel out of the exhaust.
Turn your needle all the way in carefully as to not score/sctatch the needle then turn it out 2-2.5 turns and atemt to start the engine again.