When you are approaching TBO, Lycoming offers more choices.
Choosing a Zero-Time Factory Rebuilt engine means you’ll get an engine built to new tolerances and tested to the performance specifications of a new engine, a zero-time log book, and the same two-year warranty as a factory-new engine.
Choosing a Lycoming Factory Overhauled engine means you’ll get all the most current parts and features, the same testing and factory production capabilities as a brand new Lycoming engine, and a time continued engine backed by a full year warranty on parts and labor.
Both options entail an engine core exchange.
Zero-Time Rebuilt Engines
Lycoming Factory Overhauled Engines