Will just add my 2 cents worth....My Evolution 46 has been run for 2 years with the following observations: As new, ran great, although idle mixture set at far side of limiter. One off runway excursion w/ filp over and then engine would only run for 3 to 5 minutes and quit, both in the air, and on the engine stand. Cause......metal chips in the high speed needle area, I guess came loose during my "excursion". Chips removed, new seals installed, motor runs great again.

NCDaveD