Welcome to the forum. You've come to the right place for help but we're going to need more information.
I don't know what you mean by "won't turn over". Do you mean the engine is seized, or won't start?
It needs three things to run: Fuel, air and ignition. Confirm that you have all three and get back to us with a little more details of what you have done and what you found.
Age and Treachery Will Always Triumph
Over Youth and Skill & "Charlie Don't Ride"