How to tell the HP of a 496 Mag HO

[nasdaqsam]

I was under the impression when I bought this boat it had a 425 HP 496 Mag HO. We just went to pick up exhaust gaskets and gave the parts person at the local Mercruiser dealer the VIn she states it shows its a 525 hp.

the VIN is OW652707 i searched a coupe sights and can find the parts lay out etc but nothing showing the actual HP.

 

[Tail_Gunner]

496 MAG (375hp)
Block: Cast Iron
Cylinder Head: Cast Iron (with exhaust valve seat inserts)
Intake Manifold: One Piece coated Cast Aluminum
Crankshaft: High-Density Nodular Iron (with undercut and rolled fillets)
Pistons: Hypereutectic Cast Aluminum
Connecting Rods: Forged 1141 SAE Steel (short -peened and magnafluxed, with 9-mm diameter connecting rod bolts.

496 MAG HO (425hp)
Block: Cast Iron
Cylinder Head: Cast Iron (with exhaust valve seat inserts)
Intake Manifold: One Piece coated Cast Aluminum
Crankshaft: Forged Steel (with undercut and rolled fillets)
Pistons: Hypereutectic Cast Aluminum
Connecting Rods: Forged 1141 SAE Steel (short -peened and magnafluxed, with 9-mm diameter connecting rod bolts.

 

[nasdaqsam]

Great thanks. I wonder how she came up with the 525 version. I was pretty sure it wasn't but if it was.............lol

 

[HT32BSX115]

Great thanks. I wonder how she came up with the 525 version. I was pretty sure it wasn't but if it was.............lol

The 525 usually has "Mercury Racing" on it someplace visible...........

 

[gm280]

If you like it and enjoying it, what real difference would it make? IDK :noidea: