Rich is bad? Rich is never bad. It's never bad to run an engine on the rich side.. that means it's getting lots of lubrication.

Now I would not suggest that he fly it that way, but it isn't bad. He should understand how to know when it's to rich or when it's to lean.. now lean is definitely not good, engines burn up that way.

The best thing for the OP to do is to carefully read what Downunder put in the linked post, then work with someone that KNOWS how to tune the engine properly, watch closely, and learn from that.

CGr