Mercury Racing introduces 520 sterndrive

Aug 22, 2013

Mercury Racing introduced yesterday the latest addition to its high performance sterndrive family; the 520. The naturally aspirated engine provides recreational boaters a cost effective power option that fits nicely, in both value and performance, between MerCruiser’s 8.2L MAG H.O. and Mercury Racing’s 525 EFI. The low-cost sterndrive features digital throttle and shift and is backed by an unprecedented two-year limited factory warranty.
The 520 shares the same CNC machined cylinder block used on its MAG H.O. cousin and Mercury Racing’s 502 cubic-inch-based sterndrive family. Mercury Racing enhanced the 520’s power and torque by increasing the cylinder bore size for an additional 21-cubic inches of displacement to 523-C.I.D. (8.6 L). The larger displacement, combined with Mercury Racing cylinder heads, multiport fuel injection and an electronic throttle body results in nearly 100 additional horsepower over the 430hp MAG H.O. All of this power comes from 87 posted octane (R+M)/2, (91 RON) global pump gas. The 520 complies with both EPA and CARB exhaust gas emissions limits.
For more information on the new 520 sterndrive, visit:

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