Hi, I just started breaking in a Novarossi Mephisto .12. During my first take of the break in I noticed that when the engine stalls, I can't prime it or restart it because the carb rejects the fuel. The hottest the engine got was about 216 degrees F. Once the engine's temperature goes down to about 140 degrees it primes no problem and restarts. Does anyone know of any solutions? Any suggestions would be greatly appreciated.