I just read the "manual" on the NR site. To my surprise they recommend a 30 minute break-in period, at low RPM. This is not what my previous (very limited) knowledge tell me about breaking in ABC engines.

I am ready to install two new NR91's and would like to break them in the right way.

One more question: Should they be broken in on a test stand or just by flying them a bit rich?

Thanks!!!

Ed