860

Introducing the all-new QC4v (quad cam four valve) 860 sterndrive. Designed, developed and manufactured in-house, the naturally aspirated, 9.0 liter engine features Mercury Racing’s exclusive aluminum four-valve cylinder heads and dual overhead camshaft valve train.  This proven valve train, which greatly enhances engine performance and durability over a standard two-valve design, enables the engine to produce 860 horsepower at 6800 rpm on 89 octane (Rec 90) pump fuel. The engine’s 6300-6800 rpm operating range offers unsurpassed acceleration for its power rating. The higher rev limits expand the range of propeller options available for a variety of applications.

 

Photo of 860

Introducing the all-new QC4v (quad cam four valve) 860 sterndrive. Designed, developed and manufactured in-house, the naturally aspirated, 9.0 liter engine features Mercury Racing’s exclusive aluminum four-valve cylinder heads and dual overhead camshaft valve train.  This proven valve train, which greatly enhances engine performance and durability over a standard two-valve design, enables the engine to produce 860 horsepower at 6800 rpm on 89 octane (Rec 90) pump fuel. The engine’s 6300-6800 rpm operating range offers unsurpassed acceleration for its power rating. The higher rev limits expand the range of propeller options available for a variety of applications.

 

  • Unsurpassed Durability

    Naturally aspirated, 9.0 Liter engine features Mercury Racing’s exclusive aluminum four valve cylinder heads and dual overhead camshaft valve train for unsurpassed durability

  • Enhanced Cooling

    An all-new heat exchanger maintains engine temperatures for enhanced durability

  • Unmatched Acceleration

    The 860’s 6300-6800 rpm operating range offers unsurpassed acceleration for its power rating. Higher rev limits expand the range of propeller options available for a variety of applications

  • Efficient

    The 32 valve quad cam valve train offers extreme durability at high horsepower and engine speeds so you can be confident in knowing that the engine can handle anything you can

  • Mercury Racing Transmission

    All-new Mercury Racing transmission. Compact, hydraulic design delivers smooth and consistent shifts thanks to DTS technology

  • Noise Reduction

    Rear facing ram horn intakes direct induction noise rearward to reduce cockpit noise and enhance engine power.  The 860 can also be configured with the exhaust outlets routed below water for reduced off-plane noise.

Our color is your color

Upper Engine & Exhaust: Raven Black
Lower Block & Heads: Raven Black

Compatible with

Specifications

  • Rated Power at Transmission860 (641 kW)
  • Full Throttle RPM Range6300-6800
  • Displacement Liter/CID9.0/552
  • Bore (in/mm)4.57/116
  • Stroke (in/mm)4.21/107
  • Compression Ratio9.75:1
  • Cylinder ArrangementV-8
  • Alternator (amp/watt)95/1340
  • ControllerDistributorless
  • Fuel SystemSequential Fuel Injection
  • Fuel Requirements89 Octane Pump Fuel
  • TransmissionMercury Racinq Hydraulic
  • Drive UnitM6, M8 Optional
  • Gear RatioApplication dependent (contact Mercury Racing for additional information)
  • Length (in/mm)31/791
  • Width (in/mm)38.3/973
  • Height (in/mm)26/664
  • Weight (lbs/kg) 1420/644
  • Warranty2-Year Limited for Recreational Boating
  • Naturally aspirated, 9.0 Liter engine features Mercury Racing’s exclusive aluminum four valve cylinder heads and dual overhead camshaft valve train for unsurpassed durability
  • 860 horsepower at 6800 RPM on 89 octane (Rec 90) pump fuel
  • 6300-6800 rpm operating range offers unsurpassed acceleration for its power rating
  • Higher rev limits expand the range of propeller options available for a variety of applications
  • An all-new heat exchanger maintains engine temperatures for enhanced durability
  • Standard Mercury Digital Throttle & Shift (DTS) technology provides luxury-car-like drivability
  • Twin 92 mm electronic throttle bodies feed the intake with runners designed to optimize torque
  • Rear facing ram horn intakes direct induction noise rearward to reduce cockpit noise and enhance engine power
  • All-new Mercury Racing transmission. Compact, hydraulic design delivers smooth and consistent shifts thanks to DTS technology
  • Option to route exhaust outlets below water for reduced off plane noise
  • A total of 12 color options available (engine, transom and drive)
  • An unprecedented two years of limited factory warranty for recreational boating

 

Technical Contact

If you have a question that’s not answered in our FAQs or you need additional information, please contact us at the phone numbers listed below.

Mercury Racing Technical Services Hours
Monday through Friday
7:30 a.m. – 4:30 p.m.
(Central Time)

Outboard & Sterndrive Consumer Affairs
(920) 924-2088
(Calls may be recorded for quality purposes)

Mercury Racing Product Technical Publications
Service manuals, parts manuals; operation, maintenance, and warranty manuals.
(920) 929-5110
FAX: 920-929-4894

Merchandise 

High Performance Marine Engines