Hello, I am responding to a post from JohnRingoe on June 13 2015 and response from Illionois Engine. I have a similar problem with my SImplicity Regent 2002 Kohler CommandTM CV460S Typical story - mowes well until it gets hot, then breaks up and backfires, I have to keep moving the throttle from fast to full choke to keep it running, once I reduce the load, disengage the PTO, stop moving, she idles and purrs like a kitten. AT first I thought fuel starvation, so I replaced the fuel pump, filter etc. But problem persists. DId JohnRingoe have any luck by installing the part # 12 707 01-s kit DSAI?