Rebuilt is the FAA term for what pilots call a factory remanufactured engine, or "reman." Only the original engine maker can legally rebuild an engine to true zero time with a new serial number, new logbook and no carry forward hours. Continental only reuses the major nonwearing components, such as connecting rods and gears, in its rebuilt engines, so the vast majority of all parts are brand new. The rebuilt engines are assembled using the same people and techniques as a new engine. Because so many parts in a rebuilt engine are new, the price of an entirely new engine is not a lot more, and Continental offers both.