Finally found me a spark plug today. I am still having interference problems with the servos when the motor running. I have tried moving the kill switch, tried the ferrite beads on the servo wires. Even shortened down the servo leads. I even read some place to ground the carb. i also played with the spark plug gap,Only thing i haven't tried is the capacitors on the servo leads.
I am running a 75mhz receiver with an airtronics MX3 radio. The receiver is a Hitec HFS-03MM, throttle servo is an airtronics 94102, the steering servo is a old 1/4 scale world servo that i have no idea about. Battery pack is a 4 AA battery pack with new battery's in it. Any ideas, i have control over the servos but not very good.

Thanks, Dan

I got it , got the bright idea of trying a different radio system. Pulled the receiver out of my airplane and tried that. worked great, so it must be my receiver. Think i will get an airtronics receiver and ditch that hitec crap. Maybe i can test run tomorrow even though i will be using my airplane radio.

Thanks, Dan

Are you using a resistor spark plug in the engine? If not you need to replace the spark plug with a resistor plug. Doug

yes i am running a resistor plug, took me a bit to find one.

Dan