Dear Mr. ygaabofm
Sorry we couldn't help you. Have you tried asking NASA?


" wrote in message
nk.net...
All these replies and not one serious answer.

Let me rephrase the question.

On the Big Lycoming engines, at what compression reading would indicate a
need for an investigation. In other words, what compression reading is
considered a warning sign?

ygaabofm


"kage" wrote in message
...

" wrote in message
ink.net...
On a Lycoming O-550, at what compression reading would you start to
consider
doing a top or complete overhaul?




There is no such engine.

KG