Bad generator spark plug caused sputtering and pops 

If you have something that is hard to start and sputters and pops or doesn't start at all, change the spark plug. Beg my pard for the long video, tried to cut where I could.
Had an outage for an hour back in June, pulled out the generator ( ran fine than what happened ? ) and the cords and connected the window ac units because the temperature rises fast in here. The APC ups units don't like it, they stop clicking when there is a decent load though.