if you put all back the right way then it should run.you put new gaskits on te parts?if so then make sure is tight.every were.then look at the new plug make sure it works.befor puting it in.ten set the airat 2 turns out.go with a flat blad sc.driver all the way in easy and back it out 2 full turns.make shur thereis no old gas in the motor.befor puting in a plug pull it or turn the motor ove 3 times to be sure its free.idle is go in and back it out tellit runs good.back it out allteway then start it were there is not to much gas getting toit.at one time.try that let me know