This is a used Mercruiser 496 Mag HO 425hp with only 132 hours it has just received a service and the run time was verified via the ECM.This engine is out of a 2008 model year boat. This is not a rebuilt of remanufactured engine with a who knows what for parts in it, It is a factory Mercruiser engine with a good maintnence history. The owner simply upgraded to a Mercury Racing 525. this engine is in perfect condition with little signs of use, you will not be dissappointed !!!!