For the sake of honesty and fairness, you should clearly state when this conversation took place? Leaving out any time reference is just not right. Zenith waited many years before adding the Viking to its engine forums. So your comment would fit historically years ago but may not match the current situation ten years on at all.When I was looking seriously at building a Zenair Cruzer, I spoke to Sebastian directly and we discussed engines and when I brought up Viking and his reply was. "well that is an option but for what its worth we dont use them"
As I mentioned, a friend at the last Zenith Factory FlyIn went around and checked what engines were on the Zenith aircraft that flew in for the function. More than half were Viking engines. So shall we make a call to Sebastian and discuss your comment and see if it is still his intention to discourage this choice of engine. I think I know the answer.