This is what is strange: The glitching didn't start until I re-positioned the engine when I was trying to cure the prop walk with the other hull . ( not turning right) The engine was mounted with the cylinder head on the port side of the boat, I moved it to it's present location, head down, and bam, glitching! I shielded the throttle cable with stripped down cable T.V. wire. It helped somewhat, but did not take the problem away.

I have a JR racing XR3i 75 MHz FM. radio, JR throttle servo and a Hi-tech 800bb 1/4 scale servo for steering.