I have this mower that will start once but not start when hot. I removed the coil and the ends had some build up on then I cleaned, set the gap and it started only once again. I see no engine number on this mower, its a 6.75hp commercial hi-vac model. There's the mower tag but no engine info? Edit: I found a video that show the engine numbers above the muffler, I saw those numbers but didn't think it was for the engine. Problem solved .