ShawnD2112 wrote:
Same question applies as that is what TBO is.

Actually, TBO is the manufacturer's recommended time between overhauls. The
engine may last a lot longer than that if it's babied. If you abuse the engine
(and competion aerobatics abuses engines), it will have to be rebuilt long
before TBO. I don't know if John's figure of 600-700 hours is correct, but it
wouldn't surprise me.

George Patterson
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