MerCruiser 4.5 MPI – V6

250 HP V-6 sterndrive with multi-port electronic fuel injection.

250 HP / 186 kW V-6 4.5L / 275 cid 4800–5200 RPM WOT

Fuel Consumption (GPH)

Idle100015002000250030003500400045004800 WOT
0.71.32.24.05.96.68.110.114.619.719.7

Specifications

HP / kW250 / 186
Maximum RPM (WOT)4800 – 5200
Engine TypeV6, 2-valve/cylinder pushrod
Displacement4.5L / 275 cid
Bore and Stroke4.0 x 3.6″ / 102 x 92 mm
Recommended FuelUnleaded Regular 87 Octane Minimum (R+M/2) or 90 RON, 10% Ethanol Max
Engine Control SystemStandard SmartCraft with Electronic Throttle Control; Mechanical Shifting with Optional SmartCraft DTS
Fuel DeliveryComputer controlled Multi-Port Electronic Fuel Injection (MPI)
Air InductionPerformance-Tuned Scroll Intake Manifold
IgnitionSmartCraft PCM 112 Digital Inductive
Alternator70 amp / 882 watt (Belt-Driven)
Water DrainEasy Drain "Season Extender" (Alpha) / Air Actuated "Season Extender" (Bravo)
ExhaustThrough prop
CoolingWater cooled with thermostat; FWC available as factory option (Alpha), packaged with SeaCore Drive (Bravo)
LubricationIntegrated wet sump
Recommended OilNMMA Certified FCW 25W-40 Synthetic Blend
Dimensions (L x W x H)28 x 30 x 22″ / 696 x 740 x 559 mm
Weight (engine only)761 lbs / 345 kg
Compatible DrivesAlpha

Engine Guardian System

SmartCraft Engine Guardian
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