I own a few other FPs ranging from the .15 up to the .35. None of my other FPs have ever behaved like this one. It is an engine line I am very familiar with having flown them for over 15yrs. This one is a complete anomaly.

FWIW, I always run all my engines on the rich side. I have never damaged an engine from running it lean. I still own and fly several engines that I bought in the early '90s and they all run as good or better than new. You could easily say that I baby my engines.

I think it's just worn out. I got it second-hand in a trade and never used it until recently. I have no idea how much abuse it saw from the previous owner(s).

Thanks.