2021 Mercury 4.5L 250HP ECT

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Overview

Availability Brochure
Year2021
MakeMercury
Model4.5L 250HP ECT

Product Features

Description

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.

Features
  • Built for Marine: Designing a V-6 block solely for marine use allows Mercury to build the 4.5L with the ultimate protection system, using cast-iron componentry where the engine intersects with seawater, and using corrosion-resistant aluminum and composites everywhere else.
  • Powerful Performer: Thanks to its new, long-runner scroll intake manifold which draws in more air and converts it into additional torque, the 4.5L delivers a ground-breaking power-to-weight ratio and gives you V-8 power in a V-6 package.
  • Smooth & Quiet: The 4.5L’s newly designed rear-facing throttle body, anti-whistle throttle plate, engine cover and mounts, lightweight flywheel, fuel-supply module, and structural oil pan all work together to deliver a superior idle, smoothness and low vibration. Resulting in an exceptional driving experience.
  • Corrosion Protection: The MercFusion Paint System creates an outer seal against the elements, while MerCathode® provides automatic protection against galvanic corrosion. For maximum defense against saltwater effects, the SeaCore® industrial hardcoat anodizing system and closed-cooling circuit is available with the Bravo® drive.
  • Sporty Handling: The 4.5L comes standard with Adaptive Speed Control, which automatically maintains engine rpm regardless of load or water conditions. The result is increased throttle response and a sporty feel.
  • Easy to Maintain: When service is required, maintenance is a snap with the front-mounted drive lube monitor, color-coded maintenance points – including easy-to-reach oil filter and fill – and “how-to” videos that can be accessed via the QR code on the label.
Specifications
  • 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 in. / 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 options: 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 in. / 696 x 740 x 559 mm
  • Weight (engine only): 761 lb. / 345 kg
  • Compatible drives: Alpha, Bravo One, Bravo Three, Bravo Two

Engine

Engine Type V6, 2-valve/cylinder pushrod
Horsepower 250 hp (184 kW)
Bore x Stroke 4.0 x 3.6 in. (102 x 92 mm)
Displacement 4.5 L

Dimensions

Length 28 in. (696 mm)
Width 30 in. (740 mm)
Height 22 in. (559 mm)
Weight 761 lb. (345 kg)

General

Full Throttle Operating Range 4800-5200 rpm
Fuel Induction Computer controlled Multi-Port Electronic Fuel Injection (MPI)
Alternator 70 amp / 882 watt (Belt-Driven)
Cooling Water cooled with thermostat; FWC available as factory option (Alpha) and packaged with SeaCore Drive (Bravo)
Warranty 3 Year Corrosion, 2 Year Limited

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WARNING: Operating, servicing, and maintaining a passenger vehicle, an off-highway motor vehicle, or a recreational marine vessel can expose you to chemicals including engine exhaust, carbon monoxide, phthalates, and lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm.To minimize exposure, avoid breathing exhaust, do not idle the engine except as necessary, service your vehicle or vessel in a well-ventilated area and wear gloves or wash your hands frequently when servicing your vehicle or vessel. For more information go to https://www.p65warnings.ca.gov/products/passenger-vehicle and https://www.p65warnings.ca.gov/products/marine.