2024 Mercury MerCruiser 250 HP 4.5L V6 ECT
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Year2024
MakeMercury
ModelMerCruiser 250 HP 4.5L V6 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.
Key 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.
- Repower Financing.: With Mercury Repower Financing, you can easily power up everything from fishing boats, to runabouts, to cruisers with flexible financing on the engine. You can also choose to finance rigging, gauges, controls and even labor. Mercury Repower Financing offers low rates and low monthly payments to fit a boater’s budget.
- 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.
- 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: 250 HP (184 kW)
- Maximum RPM (WOT): 4800-5200
- Engine type: V6, 2-valve/cylinder pushrod
- Displacement (L): 4.5 L
- Displacement (CID/L): 275 cu. in. (4.5 L)
- 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
NOTES:
The specifications displayed here may not be indicative of the entire engine family; click on the “See All Models and Specs” link to view the specs in detail.Engine
| Engine Type | V6, 2-valve/cylinder pushrod |
| Horsepower | 350 HP (239 kW) |
| Bore x Stroke | 4.0 x 3.6 in. (101.6 x 92 mm) |
| Displacement | 275 cu. in. (4.5 L) |
Dimensions
| Length | 28 in. (696 mm) |
| Width | 30 in. (762 mm) |
| Height | 22 ft. (559 mm) |
| Weight | 761 lb. (345 kg) |
General
| Full Throttle Operating Range | 4800-5200 RPM |
| Cooling | Water cooled with thermostat; FWC available as factory option (Alpha) and packaged with SeaCore Drive (Bravo) |
