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2018 Mercury MerCruiser Sterndrive 4.5L 250HP ECT

MerCruiser Sterndrive 4.5L 250HP ECT

The Next Generation

Featuring a host of engineering innovations, the 4.5L series establishes new standards for power-to-weight ratio, driver experience, acceleration, durability, and ease of maintenance.

Information

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Specifications

Engine Specs
  • Displacement (CID/cc) : 275 / 4.5
  • Engine Type : V6, 2-valve/cylinder pushrod
  • Bore & Stroke (in/mm) : 4.0 x 3.6 in. / 102 x 92 mm
  • Lubrication System : Integrated wet sump
  • Cooling System : Water cooled with thermostat; FWC available as factory option (Alpha) and packaged with SeaCore Drive (Bravo)
  • Ignition System : SmartCraft PCM 112 Digital Inductive
  • Engine Guardian System : SmartCraft Engine Guardian
  • Recommended Oil : NMMA Certified FCW 25W-40 Synthetic Blend
  • Engine Control System : Mechanical Shifting with Optional SmartCraft DTS, Standard SmartCraft with Electronic Throttle Control
  • Fuel Requirements : 90 RON 10% Ethanol Maximum, Unleaded Regular 87 Octane Minimum (R+M/2)
  • Fuel Delivery System : Computer controlled Multi-Port Electronic Fuel Injection (MPI)
  • Water Drain System : Air Actuated "Season Extender" (Bravo), Easy Drain "Season Extender" (Alpha)
  • Exhaust System : Through prop
  • Air Induction System : Performance-Tuned Scroll Intake Manifold
  • Alternator amp / Watt : 70 amp / 882 watt (Belt-Driven)
  • Compatible drives : Alpha, Bravo One, Bravo Three, Bravo Two
  • Dimensions (L x W x H) : 28 x 30 x 22 in. / 696 x 740 x 559 mm
  • Displacement (L) : 4.5
  • Fuel Ethanol Tolerance : Up to 10%
  • HP / kW : 250 / 186
  • Maximum RPM (WOT) : 4800-5200
  • Recommended Fuel : Unleaded Regular 87 Octane Minimum (R+M/2) or 90 RON 10% Ethanol Maximum
  • Weight (engine only) : 761 lb. / 345 kg