Info needed

I picked up a very clean engine without doing all the homework I should have and I'm sort of unsure what I have.

Data plate says:
Model IO-540-0485
Engine# L-4979-48
TC1-E4
Octane min 91/96
250HP@ 2,575

Anybody have a clue?

Lycoming website was zero help.

[Radomir]

Could it be J4A5? Is that data plate legible?

It is...and that's all the info on it in my prior post.

[mahlon_r]

Call Lycoming with the info, they should be able to help you out. Hopefully, just a typo on the data plate. I don?t recall ever seeing any 540?s with that style model number that were used for off plane use. If you send me a picture of the data plate maybe I can see if it is real from the appearance. The TC should stand for Type Certificate , but I couldn't check the number as the FAA site is down.
Good Luck,
Mahlon
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