Airboat Lycoming's

john smith wrote:
John, if I'm putting words in your mouth, let me know.

No, you and others have covered the topic well. I was unintentionally
brief and you stepped in and filled in the gap. Thank you.

One, as alluded to here, most airboat engines are built totally or
largely from scrounged UNAIRWORTHY parts. Many if not most will fail
under power sooner or later. Airboat use puts a lot of stresses on
these engines not originally figured on and not apparent in most
aviation uses.

Two, what parts in them not unairworthy are likely as not stolen.

Airboaters are slowly abandoning LyCon power. perhaps homebuilders
should more frequently take the hint.