John Deere LX176 MOL176X072078. Powered by a FC420V-AS10. 38 inch cut with electric PTO. I had to get parts for the carb from JD only place available. The electrical system has been modified several times, just FYI. I have it starting and running good my problem..... When I engage the PTO at 3200RPMs it will run all day. If I idle down from 3200 to about 2500 RPMs it will sometimes backfire but will always cough and die. If I engage blades at idle it dies.
Is it designed to be wide open when the blades are engaged?
Is it possible that at less than high RPM the charging system is not putting out enough juice to run the system. Battery is a little sketchey.
TIA