Buy New Mercury 250 HP ECT 4.5L Inboard Engine Online

The 4.5L series sets new benchmarks for power-to-weight ratio, acceleration, driver experience, longevity, and ease of maintenance thanks to a number of engineering improvements.Built for maritime: Mercury was able to construct the 4.5L with the best protection system possible by designing a V-6 block specifically for maritime use. Cast-iron components are used where the engine comes into contact with seawater, while corrosion-resistant aluminum and composites are used everywhere else.

SPECS:

HP / kW
250 / 184

Maximum RPM (WOT)
4800-5200

Engine type
V6, 2-valve/cylinder pushrod

Displacement (L)
4.5

Displacement (CID/L)
275 / 4.5

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
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 Scroll Intake Manifold

Ignition
SmartCraft PCM 112 Digital Inductive

Alternator amp / Watt
70 amp / 882 watt (Belt-Driven)

Water drain system
Air Actuated “Season Extender” (Bravo)
Easy Drain “Season Extender” (Alpha)

Exhaust system
Through prop

Cooling system
Water cooled with thermostat; FWC available as factory option (Alpha) and packaged with SeaCore Drive (Bravo)

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)
28 x 30 x 22″ / 696 x 740 x 559 mm

Weight (engine only)
761 lbs / 345 kg

Compatible drives
Alpha
Bravo One
Bravo Three
Bravo Two