I guess I need to consider selling mine. Since its 13 months old now. Actually, I kind of enjoy watching the hours add up. I'm hoping I can make this kawi go very high hours. Synthetic oil and putting clean air filter on 2 times daily, I'm betting the machine goes many hours. So far this season I've put just over 325 hours. I will still be doing leaves until the end of the year. Probably add at least another 100 hours. I would like to get a mower to last as long as the ford tractor I have. 12,320 hours on the original motor and its in great shape. Enjoy your machine, 650 hours is nothing.