2023 Mercury MerCruiser 300 HP 6.2L V8 ECT

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Year2023

MakeMercury

ModelMerCruiser 300 HP 6.2L V8 ECT

Rethink the V-8.

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

Key Features

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.®
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.
Sporty Handling: Adaptive Speed Control maintains rpm during hard turns, creating a sportier, more intuitive driving experience without needless throttle adjustments.
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.
Smooth Operator: Front and rear engine mounts isolate vibration for a smooth, quiet performance.
Easy To Maintain: Accessible, easy-to-reach, color-coded maintenance points.

Specifications

HP: 300 HP (224 kW)
Maximum RPM (WOT): 5000-5400 RPM
Engine type: V8, 2-valve/cylinder pushrod
Displacement: 377 cu. in. (6.2 L)
Bore and stroke: 4.0 x 3.75" (101.6 x 95.25 mm)
Recommended fuel: Unleaded Regular 87 Octane Minimum (R+M/2); 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: Mechanical Shifting with Optional SmartCraft DTS; Standard SmartCraft with Electronic Throttle Control
Fuel delivery system: Computer controlled Multi-Port Electronic Fuel Injection (MPI)
Air induction: Performance-Tuned Long-Runner Intake Manifold
Ignition: SmartCraft PCM 112 Digital Inductive
Alternator: 70 amp (882 watt), belt-driven
Water drain system: Air Actuated "Season Extender" (Bravo)
Exhaust system: Through prop
Cooling system: Water-cooled with thermostat; Optional SeaCore pack: Fresh water cooled
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)
Compatible drives: Bravo One; Bravo Three; Bravo Two

Full Throttle Operating Range	5000-5400 RPM
Fuel Induction	Computer controlled Multi-Port Electronic Fuel Injection (MPI)
Alternator	70 Amp (882 W), belt-driven
Cooling	Water-cooled with thermostat; Optional SeaCore pack: Fresh water cooled