Well I fiiddled and farted with the thing with no measurable success. So I bought another Y.S. 91FZ off of here and that thing runs much better and am much happier with that motor. The one issue that I do notice though is that even this motor will stop if it idles for too long, but I took a tach to it and it was at about 8k rpm at full stick. Isn't the optimum rpm for a Y.S. .91 closer to 10k? Could my prop be bogging down the motor? I am running a MA14X8 so maybe I am running a too large of diameter prop? I guess I could go with an APC 13X9 or 10 or something, but I was just paranoid that the radial cowl of the 190 would affect the thrust since it is like a big salad bowl behind the prop. Should I just prop this sucker down and get the rpm up? This is where those with the experience and "know how" chime in.....

BTW: What is the best rpm for idle? I have it currently at about 3.6-3.9K