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Grove Harbour Marine
2017 Mercury MerCruiser 6.2L 300 ECT
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Rethink the V-8.

A 6.2-liter V-8 engine with unparalleled torque and acceleration to get you on plane quickly and smoothly.

Standard Features
  • Easy To Maintain.
    Accessible, easy-to-reach, color-coded maintenance points.
  • Powerful Performer.
    Power and acceleration is delivered with 6.2 liters of displacement and a long-runner scroll intake manifold that optimizes air flow for higher torque.
  • Quiet Ride.
    An unmatched boating experience thanks to an intake resonator and aft-facing throttle body that work together to dramatically reduce noise, while directing the engine sound away from the cockpit.
  • Repower Financing
    With Mercury Repower Financing, you can easily power up everything from fishing boats, to runabouts, to cruisers with flexible financing on the engine. You can also choose to finance rigging, gauges, controls and even labor. Mercury Repower Financing offers low rates and low monthly payments to fit a boater's budget.
  • Rethink the V-8.
    We certainly did. Everything, part by part, system by system, with a total design and engineering commitment to marine use. The result? A 6.2-liter V-8 engine with unparalleled torque and acceleration to get you on plane quickly and smoothly. A whole new sporty feel at the wheel. Significant reductions in sound and vibration at the helm. Major improvements in the cockpit environment, by design. All wrapped in the legendary reliability you've come to expect from Mercury.®
  • Smooth Operator.
    Front and rear engine mounts isolate vibration for a smooth, quiet performance.
  • Sporty Handling.
    Adaptive Speed Control maintains rpm during hard turns, creating a sportier, more intuitive driving experience without needless throttle adjustments.
Engine Specs
Max RPM (WOT)5000 - 5400
Engine TypeV8, 2-valve/cylinder pushrod
Bore & Stroke (in/mm)4.0" x 3.75" / 101.6mm x 95.25mm
Lubrication SystemIntegrated wet sump
Cooling SystemFresh water cooled available with SeaCore option
Water-cooled with thermostat
Ignition SystemSmartCraft PCM 112 Digital Inductive
Engine Guardian SystemSmartCraft Engine Guardian
Recommended OilNMMA Certified FCW 25W-40 Synthetic Blend
Engine Control SystemMechanical Shifting with Optional SmartCraft DTS
Standard SmartCraft with Electronic Throttle Control
Fuel Requirements90 RON 10% Ethanol Maximum
Unleaded Regular 87 Octane Minimum (R+M/2)
Fuel Delivery SystemComputer controlled Multi-Port Electronic Fuel Injection (MPI)
Water Drain SystemAir Actuated "Season Extender" (Bravo)
Exhaust SystemThrough prop
Displacement377 / 6.2 (CID/L)
Compatible drivesBravo One
Bravo Three
Bravo Two
Weight (engine only)862 lbs / 391 kg
Displacement (L)6.2
HP / kW300 / 224
Alternator amp / Watt70 amp / 882 watt (Belt-Driven)
Dimensions (L x W x H)32 x 30 x 22" / 813 x 762 x 559 mm
Air Induction SystemPerformance-Tuned Scroll Intake Manifold
Recommended FuelUnleaded Regular 87 Octane Minimum (R+M/2) or 90 RON 10% Ethanol Maximum
Fuel / Ethanol ToleranceUp to 10%