I just purchased a pontoon with the above engine. The motor would not run very well under a load. It was a jet plugged on the bottom carb. After rebuilding and cleaning all 3 the motor runs great but will not idle slow. I have adjusted the idle position to its lowest setting as well as the linkage and the stator timing. On muffs it is currently idling at 1700 rpm. Any ideas on what I've missed or miss adjusted?