low compression until starting

Any thoughts or ideas? Same question puzzles me too...

What are the results of a leakdown test on the cold engine?

i did a research project on this with a dozen planes years ago. I did a compression test when it was hot ehn again the next morning when it was cold. Because Rotax has nice tight tolerances vs Continental or Lycoming the differences in hot vs cold on the Rotax was anywhere from no difference to 1 psi. I have over the years seen engines where the initial test was only 87/70, but just running the engine for 2-3 minutes had it come right back up to normal. That didn't mean something inside was broken it just needed a little alignment change with rings with a quick run.

I'm old school so I still tend to use 87 psi test pressure, but 80 psi is good too.