1. Should I be worried about the lack of flying recently on the engine?
Mine was not flown for the year before I bought it. I spent too much time worrying whether it was a reliable engine. Here are the results from the last oil change.
We cut the filter, nothing in there that wasn't supposed to be there.
Oil metals test, all of the metals were within tolerance.
I would have the oil changed when you get the annual done. But other than that, I wouldn't worry about the engine just because of its age. I'd worry if other warning signs are found.
Get a prebuy if you decide to go forward with it. A good A&P will be able to tell you a lot from that prebuy.
Good luck.
