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View Full Version : Mercruiser 454 mag.



jimmy_ahlvik
03-05-2005, 04:30 PM
Just bought a 25zx -97 with a 454 mag. and wonder if anyone know how many hp it has?

Thanks Jimmy

Air 22
03-05-2005, 05:43 PM
Get the serial number from the block...starts w/ OF.... then post back or call a certified Mercruiser dealer w/ info. Is it a carb or EFI? Carb should be 350hp range EFI should be 385hp range...assuming the engine is stock. HP of engine is measured at crank not prop. Depending on gear ratio ie...BRAVO I is 1:5:1 you loose some power at the prop usually 15-20hp because of the drive. If all else fails take it to an engine shop and have it dyno tested. That is the no BS way to find out the HP...but that costs some $$$ Good Luck :smash: