so my engine gave out on me a few months back and i thought it might have been due to bypassing and not removing the governor. so i opened it up and pulled it out. still wouldnt fire up. checked compresion, nothing. cleaned the carb, still nothing. then my wife came out to the garage after listening to me cuss it up and down and said" have you checked the spark plug?" that made me even more mad. i told her that it doesnt have enough hours to even think about it. but i pulled it back out, went to the parts store and picked up an ngk. sure enough, she was right. props to my wife.
I have had that happen to me on my lawnmower. The plug is the first thing that I check now