Installed a JD jet kit on my new-to-me 610 per their instructions (red needle, 5th notch from top, 178 main, 45 pilot, their leak jet, thin o-ring, fuel screw 1.5 turns out). It runs fine and idles smooth, but the idle rhythmically wanders...1600 rpm for 30 - 60 seconds, then up to 2200 rpm for 30 - 60 seconds, then back down, etc. Any ideas/advice? Thanks!
