Hello WFM experts...I bought a little 130 with a 9hp Kawasaki and bagger to use to cleanup the yard after de-thatching. (I have older 100, 200, and 300 series tractors to do the real workThe unit starts only with the throttle in the low-idle position. It won't pop at all with full choke. Once it starts at low idle I must let it run there for a while before I can gradually increase throttle. If I try to increase rpm's before it idles for a while, it will shut down. I have put (2) carbs on and the same problem occurs. Compression is at about 70 cold which is where I think it needs to be with the acr system. I have a new plug in and new fuel. Once it idles for a while, no problem increasing idle and power seems to be really good. I did adjust the valves a couple of times and they seem to be right on and the adjustments did not affect this situation. Any ideas why it is hard starting and will only fire with the throttle in idle position?