Wow...thanks for all the input. As for servo choice the HS-225MG is an analog servo. I have to agree with QS that a digital servo is not the best choice for a throttle servo on a vibrating gas engine. I was able to run a few tests today and figured it out. I switched the servos connection to make sure that it was not the receiver so I put the throttle in the rudder slot and used that to control the throttle. Still got the glitching. So I tried a different location for the ignition battery...still glitching. I unplugged the servo and and manually adjusted the throttle by turning the servos head. I then plugged a brand new servo into the throttle spot and held it next to my installed throttle servo...IT STARTED TO TWITCH!!!. SPEKTRUM is not imunue to RF noise!!!! I found that the Roy Scholl Ignition module that comes with the Brillelli engine has had some problems with their circuitry. Not a big problem. I called Scott at Brillelli (a wonderful person to deal with) and he is sending me a new CH ignition module FREE of CHARGE. That is excellent customer service. He also took some time to mentally trouble -shoot the issue. I hope this fixes the problem.

Will post the results once everything is installed.