Infinite. However there tends to be a big "depends" with this. And at the top of the list is how you maintain the engine over its OH cycle and who performs the overhauls that usually determine the number of OHs a specific engine can endure.what's a reasonbale/rational limit on the number of overhauls?
Also, there may be case modifications that could be a benefit. I adhered to the "overhaul twice" rule.
But I agree, the Rebuilt prices are insane. I watched the price increase almost 20% while I was waiting over a year for mine (ordered in 2021). At the current price for my engine, I would probably sell the plane.
Update - one overhaul only, was done at 2700 hours - I guess someone treated it gently. It has about 500 since, with two cylinders replaced. It's well past calendar TBO.
Oh, less than 50 per year - it's 15 years past calendar TBO. Guesstimating about $30K to do the deed, overhaul and labor. That would hurt. A lot.Wait; only 500hrs in 12 years? That’s less than 50hrs/year on average. Not necessarily a bad thing, but be aware an OH may be on the menu, so price it accordingly.
Oh, less than 50 per year - it's 15 years past calendar TBO. Guesstimating about $30K to do the deed, overhaul and labor. That would hurt. A lot.
along with a few thousand for various firewall forward stuff like hoses, etc. that gets done.
Probably ran it decently hard and often to get to 2700 hours. Not uncommon for that engine.Update - one overhaul only, was done at 2700 hours - I guess someone treated it gently. It has about 500 since, with two cylinders replaced. It's well past calendar TBO, has good compressions, and the logs (engine & airframe) are complete. A&P/IA is the original and current owner. I might be talking myself into something. . .