Hi all, I joined the forum because I have a problem with a generator. I'm askin for help, PLEASE. B&S powerboss 5500 Model #030249 10 horse OHV. This is the sisterinlaws machine, which I have borrowed once before. Story is, "it was runnin fine and then it shut itself off". When I stepped up and pulled the cord, it felt like there was no compression whatsoever. I could see the generator portion spinning. It spins over and kinda freewheels a bit if you give it a good pull. I thought maybe a stuck valve. Brought it home, added oil in case it was a low oil thing. Oil looked ok but it was a little low. VERY few hours on the machine. My guess is they have never changed the oil. I pulled the plug to see if the piston was moving. No, it's not. So, that is my question. Why wouldn't the piston move when the motor seems to be spinning. It would make more sense to me if the motor spun but not the generator. I haven't torn anything apart yet, figured I start with the research. I appreciate any and all advice or suggestions.