I know this could be a number of things causing these symptoms. I just want an idea of what may be causing this to get an idea on the dollar damage its gunna take to fix. One of my guys was mowing in around 4 hour blocks on this mower with the Honda and it usually dosn't get operated in such long cycles. What got me was when I asked him how long It'd been doing this he said "Ohw around 1/2 an hour" I was Pi$$ed that he didn't shut it down as soon as it started playing up. So what may have been a minor problem could have become a fatal engine issue?................I don't know? It stil runs..........Just as I described in the thread title. It's just hit 220 hours. Thanks for any help.