Was having devil of a time getting this thing started. 50-100 pulls without firing. Ready to junk the thing. Just replaced fuel line, filter / pick up and spark plug. Got it to fire off, but now getting gas bubbling out from top of cylinder collecting around spark plug...also dripping near drive sprocket. Could carb be plugged open? cracked cyclinder? It's maybe 2-3 years old...light use until now. Any ideas? Great site, by the way. Enjoy reading about everyones projects / efforts to stay warm.