If the gov't requires you to use a certified engine you must use a
certified engine. If it does not there is no reason to use a certified
engine. The price difference is the cost of getting the gov't
certification (which also usually means the engine is less advanced
since certificating authorities hate dealing with advancements). For
instance an IO-360 vs the same Lycoming engine for experiementals, you
would never buy the certified IO-360 unless you are required to.

-Robert


On Feb 15, 4:36*pm, aerojones
wrote:
Hi,

Could anyone give me a brief overview of the benefits of buying a
certified engine over a non-certified engine? Why do manufacturers sell
both? Price difference? Does the owner have to get the engine certified
after purchasing?

Thank you for your help

--
aerojones