hi there, i just bought my brand new O.S. .18 CV-RX motor a few weeks ago. I did a proper heat cycle method break-in and tuned it and it ran amazing. it idled perfectly and it had tons of power. untill today when i tryed to start it, and everytime after it started it kept stalling. I DID NOT change any of the tunning settings nor the idle speed. The engine also seemed like as if it sounded alot more high piched. every single time i let go of the throttle the slightest it would just stall. i tryed turning the low speed 1/2 a turn to the left (rich). That didnt help at all. I also checked the glow plug and it seems to be burning nice and bright. The engine has only been through less than 1/2 a gallon including break-in and i have ALWAYS used after run oil, and cleaned the air filter everytime. So i highly doubt that the engine is damaged in any way. Thanks for your help in advance.