Here's the real head scratcher..............the new cable did the same thing before they were completely done with the installation! It was a 2000 Oviation with around 400TT on it.
I agree with Bennett. I'd be happy with a non-vernier control for the throttle. If you look at the very top of the throttle control in the picture you can see the cable that twisted off. Not sure why that happened but it would appear it just twisted off from screwing it in and out with the vernier feature. Don't know enough about the mechanics of how a vernier throttle works to diagnosis the failure but it obviously wasn't working as designed.