Basic radio installation 101:

When using a gasoline engine with an ignition system that fires thousands of volts to a spark plug.........................................

Keep all your RX stuff at least 12" away from the ignition (magneto), ignition switch and ignition battery if using electronic ignition.

That means you keep your RX battery, servos, RX, switch and everything else related to the receiver at least 12" away from that engine/ignition/sparkplug/switch.


Dump the PCM RX and get an FM PPM RX for the initial range checks. When you get it all sorted out and you have no more glitches using the PPM RX, THEN you switch back to the PCM RX.

PCM will hide glitches and RF problems. Hiding a problem like that will bite you in the butt one of these days. Use the PPM RX to "prove" your installation because it won't hide anything. If you have a problem, it will show up during range checks with the PPM RX. Once you get it all sorted out you can switch back to PCM if you want.

Of course, I'm probably a total idiot and somebody MUCH smarter than me will come on here and tell you it's the metal clevis on the elevator pushrod.