Morgans wrote:
How about running the engine over 100% for normal operations. That's
gotta be good on it, don't 'cha think?

Oh, I know, you-know-who has an answer for that one, too.

You bet I do, after all, I know what I'm doing, and done it a lot.

I don't run the engine at 100% power. I run the engine at 100% RPM, that
different. So does ALL rotax powered helicopters. Here is what I posted
about that;
Rotax 582 for power:

"The Rotax 582 aircraft engine does not run “full bore” in a Mini-500.
That engine comes from a snowmobile, where it could run at 10,000rpm and
put out 110hp. It is de-rated by Rotax only by lowering the RPM for
aircraft use. So long as it is cooled to 180F and has proper jetting, it
will run even at full bore for hundreds and hundreds of hours. At this
reduced power level, this engine is designed to continuously operate at
that power level, and in some cases does so.

I have never had a Rotax two stroke engine just quite due to over
exertion out of nearly 2000 aircraft I have delivered. Those that did
failed, failed from mainly two reasons. Even after the owner fixed the
engine, the same failure would occur time and time again, because it was
not a problem with the engine, but the installation. 98% of all Rotax
engine failures are due to improper customer installation. The other 2%
are due to improper maintenance.

The Mini-500, as well as all helicopters that use any reciprocating
engine, run at full RPM, but that is not full bore, since a helicopter
reduces or increases its power setting to operate."

Keep the questions coming!