2012 Mercury MerCruiser Sterndrive 377 MAG ECT

MerCruiser Sterndrive 377 MAG ECT

Dependable and versatile, MerCruiser small block engines are ideal for runabouts and cruisers, delivering rock-solid performance and allowing you to enjoy the activities you want to, when you want to

- MerCruiser small block V8s are the premier option for runabout owners seeking the best available power configuration
- Owners of dual-engine cruisers up to 38 feet will find steadfast performance in MerCruiser small blocks with features such as the intuitive joystick control of Axius, which allows precise and easy boat maneuverability
- Reap the benefits of standard SmartCraft Digital Throttle & Shift: smooth shifting, immediate throttle response, and cutting-edge digital controls and information displays
- SmartCraft features such as ECO-Screen help you optimize fuel economy; MercMonitor lets you customize data readouts displayed on an easy-to-read LED screen


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Engine Specs
  • HP at Prop : 320 / 235
  • Displacement Liter/CID : 377 CID / 6.2 L
  • Cylinder/Configuration : V-8
  • Bore & Stroke (in/mm) : 4.00 x 3.75in / 101 x 95mm
  • Compression Ratio : 9:0:1
  • Cooling System : Raw water, Thermostatically controlled
  • Full Throttle RPM Range : 4800-5200
  • Ignition System : Crank fired high voltage switch with knock control
  • Accessory Drive System : Serpentine belt
  • Engine Guardian System : High coolant temperature, Knock control, Low oil pressure, Low sea water pressure, Low voltage, Over-rev
  • Alternator Amp : 65 amp / 917 watt
  • Recommended Oil : Mercury MerCruiser Full-Synthetic Engine Oil, 20W-40, NMMC FC-W rated
  • Engine Control System : PCM 09 with SmartCraft CAN capability, OBD-M diagnostics, Dual oxygen sensors
  • Fuel Delivery System : Cool Fuel
  • Fuel Injection System : Multi-point electronic fuel injection (EFI), Sequential Fuel Injection with Digital Throttle & Shift
  • Water Drain System : Three-point manual (Bravo)
  • Dimensions (LxWxH) in : 32in x 30in x 22in
  • Dimensions (LxWxH) mm : 814mm x 740mm x 559mm
  • Digital Throttle and Shift : Yes
  • Exhaust System : Electro-deposition paint coated iron manifold with dry joint elbow
  • Weight (lbs/kg) : 868lbs / 393kg
  • Boat Types : Cruiser, Deckboat, Performance (more than 60mph), Pontoon, Race, Runabout (cuddy), Runabout (open bow), Sport Yacht, Sportboat (sterndrive)
  • Emissions Control Technology : Yes*
  • Recommended Fuel : 87% octane / up to 10% ethanol