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)

Idle	1000	1500	2000	2500	3000	3500	4000	4500	4800	WOT
0.7	1.3	2.2	4.0	5.9	6.6	8.1	10.1	14.6	19.7	19.7

Specifications

HP / kW	250 / 186
Maximum RPM (WOT)	4800 – 5200
Engine Type	V6, 2-valve/cylinder pushrod
Displacement	4.5L / 275 cid
Bore and Stroke	4.0 x 3.6″ / 102 x 92 mm
Recommended Fuel	Unleaded Regular 87 Octane Minimum (R+M/2) or 90 RON, 10% Ethanol Max
Engine Control System	Standard SmartCraft with Electronic Throttle Control; Mechanical Shifting with Optional SmartCraft DTS
Fuel Delivery	Computer controlled Multi-Port Electronic Fuel Injection (MPI)
Air Induction	Performance-Tuned Scroll Intake Manifold
Ignition	SmartCraft PCM 112 Digital Inductive
Alternator	70 amp / 882 watt (Belt-Driven)
Water Drain	Easy Drain "Season Extender" (Alpha) / Air Actuated "Season Extender" (Bravo)
Exhaust	Through prop
Cooling	Water cooled with thermostat; FWC available as factory option (Alpha), packaged with SeaCore Drive (Bravo)
Lubrication	Integrated wet sump
Recommended Oil	NMMA 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 Drives	Alpha

Engine Guardian System

SmartCraft Engine Guardian

← All MerCruiser Engines All Manufacturers