Mercury MerCruiser 6.2L 300 ECT

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New Mercury MerCruiser 6.2L 300 ECT & ZF 45A

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Mercury MerCruiser 6.2L 300 ECT

One size doesn't fit all

Proven technology, rock-solid reliability and an unbeatable combination of performance and fuel efficiency.

Features may include:

Corrosion Protection.

  • The freshwater closed-cooling system (standard) dramatically limits potential corrosion. In fact, Mercury® is so bullish about the anti-corrosion technology built into these engines, we offer a standard four-year limited corrosion warranty in addition to the three-year limited factory-backed warranty.


  • The Mercury MerCruiser 6.2L offers exceptional fuel efficiency. Wide band oxygen sensors continuously monitor oxygen levels, which enables the engine control module to deliver precisely the correct amount of fuel. The result is fuel economy that stretches your boat’s range and your dollar.

Joystick Piloting for Inboards.

  • The only joystick piloting system that’s compatible with gasoline or diesel inboard and tow sport engines.
  • The only joystick piloting system for single-inboard boats.

Power & Performance.

  • High-displacement volume and premium MPI fuel injection combine to deliver outstanding acceleration, instant planing and smooth performance throughout the rpm band. Mercury® SmartCraft® Digital Throttle & Shift is standard, providing precision throttle response and effortless steering.

Durable & Reliable.

  • Mercury’s Engine Guardian continually monitors critical sensors for any sign of a problem and immediately takes action, while the water-cooled Cool Fuel delivery system on the 8.2L Inboard engine prevents vapor lock. Rugged construction, including stainless-steel exhaust, ensures long-term, hassle-free operation.


HP / kW

          300 / 224

Maximum RPM (WOT)

          5000 - 5400

Engine type

          V8, 2-valve/cylinder pushrod

Displacement (L)


Displacement (CID/L)

          377 / 6.2

Bore and stroke

          4.0" x 3.75" / 101.6mm x 95.25mm

Recommended fuel

          Unleaded Regular 87 Octane Minimum (R+M/2) or 90 RON 10% Ethanol Maximum

Fuel ethanol tolerance

          Up to 10%

Fuel requirement

          90 RON 10% Ethanol Maximum

         Unleaded Regular 87 Octane Minimum (R+M/2)

Engine control system

          Optional SmartCraft DTS

Fuel delivery system

        Computer controlled Multi-Port Electronic Fuel Injection (MPI)

Air induction

         Performance-Tuned Scroll Intake Manifold


          SmartCraft PCM 112 Digital Inductive

Alternator amp / Watt

          70 amp / 882 watt (Belt-Driven)

Water drain system

          Air Actuated "Season Extender" (Bravo)

Cooling system

          Water-cooled with thermostat

Lubrication system

          Integrated wet sump

Recommended oil

          NMMA Certified FCW 25W-40 Synthetic Blend

Engine guardian system

          SmartCraft Engine Guardian

Dimensions (L x W x H)

          32 x 30 x 22" / 813 x 762 x 559 mm

Weight (engine only)

          862 lbs / 391 kg


          ZF 45 A – 8o Down angle, direct mount marine transmission

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