Ditto the above. Its a common misconception that you should only use PCM receivers with gas engines. Either PPM or PCM would be fine. If one is going to decide to go PCM vs PPM, it should be done on the actual merits of the technology along, and not old wives tales and incorrect information. So don't feel the need to switch because you are running a gas motor. It will only upset you when you start noticing all the airplanes on the flight line with gas engines and PPM receivers.