520

The naturally aspirated 520 sterndrive provides recreational boaters a cost effective power option that fits nicely, in both value and performance, between the MerCruiser 8.2L MAG HO and Mercury Racing 540.  It  features digital throttle and shift and is backed by an unprecedented two-year limited factory warranty.

Joystick Piloting is available on select 520 models featuring the Mercury Racing Bravo Three XR drive. Applications require through transom exhaust. An optional X-haust Noise Reducer Kit available.

The 520 complies with EPA emissions requirements. CARB (California Air Resources Board) emissions compliant models are available upon special request.

 

Photo of 520

MODEL DETAILS

The naturally aspirated 520 sterndrive provides recreational boaters a cost effective power option that fits nicely, in both value and performance, between the MerCruiser 8.2L MAG HO and Mercury Racing 540.  It  features digital throttle and shift and is backed by an unprecedented two-year limited factory warranty.

Joystick Piloting is available on select 520 models featuring the Mercury Racing Bravo Three XR drive. Applications require through transom exhaust. An optional X-haust Noise Reducer Kit available.

The 520 complies with EPA emissions requirements. CARB (California Air Resources Board) emissions compliant models are available upon special request.

 

Specifications

  • Horsepower
    520 (388 kW)
  • Full Throttle RPM Range
    4800-5200
  • Displacement Liter/C.I.D
    8.6/523
FULL SPECS
  • Stroke (in/mm)
    4.00/101.6
  • Compression Ratio
    8.7:1
  • Cylinders
    V-8
  • Alternator (amp/watt)
    65/917
  • Ignition Type
    PCM
  • Fuel System
    Sequential Fuel Injection
  • Fuel Requirements
    87 Octane Minimum (R+M/2), (91 RON) Global
  • Drive Unit
    Bravo One XR, Bravo One XR Sport, Bravo One XR Sport Master (std. & short), Bravo Three XR; (Integrated Transom System Optional)
  • Gear Ratio
    Bravo One XR, Bravo One XR Sport, Bravo One XR Sport Master (std. & short), 1.35:1, 1.50:1, Bravo Three XR, 1.65:1, 1.81:1 or 2.00:1
  • Length
    (in/mm) 34.2/869 (Transom mount to front of engine)
  • Width
    (in/mm) 33.8/858
  • Height
    (in/mm) 24.2/615
  • Weight
    (lbs/kg) 1218/553 (Lightest available engine package (engine, transom plate and drive)
  • Warranty
    2-Year Limited for Recreational Boating
HIDE SPECS
  • Complies with EPA emissions requirements. CARB (California Air Resources Board) emissions compliant models are available upon special request.
  • 8.6 Liter multiport fuel injected V-8 engine features a premium forged micro- alloy crankshaft, induction hardened and precision balanced for maximum performance.
  • Precision CNC cast iron cylinder block features large 4.560-inch cylinder bores for enhanced power and torque.
  • Forged 4340 steel, I – Beam, shot-peened connecting rods.
  • Forged aluminum pistons, designed by Mercury Racing®, for maximum strength and durability.
  • Mercury Racing® aluminum cylinder heads feature optimized valve angles for improved air flow.
  • Carburized hardened cam shaft for enhanced durability.
  • Performance cam profiles, combined with larger valves, pack more air into the combustion chamber for greater power and torque.
  • Broad torque band for enhanced hole shot, unprecedented mid-range punch and consistent pull through the top-end engine rpm operating range.
  • Digital electronic throttle and shift for smooth, “Zero Effort” operation.
  • The engine propulsion control module (PCM) optimizes fuel and spark control for each cylinder independently, enhancing engine running quality and performance.
  • The Engine Guardian System monitors engine functions to forewarn of possible problems that could lead to engine damage.
  • Fuel delivery is ensured with twin electric fuel pumps operated in a water cooled housing.
  • The thermostatically-controlled oil system ensures faster oil warm up. The high-capacity cooler maintains good oil temp under all operating conditions.
  • Closed-cooling system features five-year coolant for reduced maintenance and increased corrosion protection.
  • 65-amp (917-watt) charging system.
  • Two year limited warranty for recreational boating.
  • Suitable for: Catamaran Race, Catamaran Sport/Poker Runner, Sport Cruiser, Vee-Bottom Race, Vee-Bottom Sport/Poker Runner

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High Performance Marine Engines