Mercury MerCruiser 4.5L 250hp ECT
The Next GenerationFeaturing 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. |
Advanced MPIThe multi-point electronic fuel injection system fine-tunes the air-to-fuel ratio for the ideal combination of power and efficiency. |
Adaptive Speed ControlThe Adaptive Speed Control feature lets you maintain engine rpm despite changes in load or conditions. Climbing large swells is easier. Cruising at low speeds is smoother. Carving out tight turns is effortless. |
SeaCoreTake on the toughest marine conditions with the available SeaCore® system. It’s an entire package of durable, corrosion-fighting technology that offers an extraordinary level of protection, including hard-coat anodizing on the drive, stainless-steel fasteners and components, and a closed cooling system. |
Ample Charging OutputA powerful alternator delivers 70 amps of charging power at wide-open throttle – perfect for keeping onboard electronics running long into the fun. |
Engine GuardianExplore farther with confidence knowing that the Engine Guardian system is at work. It monitors the engine and, if necessary, can adjust engine functions to help get you home safely. |
Smooth & QuietFrom the mounts to the throttle system, we’ve fine-tuned the 4.5L engine to minimize noise and vibration – all for an exceptional driving experience. |
Exceptional Fuel EconomyElectronic fuel injection optimizes efficiency so you can get maximum fun from every fill-up. Plus, MerCruiser engines deliver full performance on 87-octane fuel for additional savings at the pump. |
Exciting SpeedsDon’t waste a second on the water. With V6 muscle and performance, the 4.5L engine will get you where you want to go fast – and you’ll have a whole lot of fun on the way. |
Noise ReductionHear your friends and family talk. Hear yourself think. Enjoy your time on the water. A MerCruiser engine is still as powerful as ever. Thanks to sound-dampening advancements, it’s just not so loud about it. |
PerformanceHigh-displacement engines and multi-port fuel-injection systems maximize performance from every drop of fuel. You’ll enjoy quick acceleration, instantly responsive power and total fun. |
Effortless OwnershipA redesigned service access has simplified what was once a hassle, bringing all service points to a single easily reachable location, color-coded for owner-friendly maintenance. |
DurabilityThrough grueling endurance test cycles – in the lab and on the water – Mercury has refined every MerCruiser engine into an unflinching workhorse, built with better alloys and superior paints that can stand up to the harshest conditions. |
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Digital Throttle & Shift
Joystick Piloting for Sterndrives
VesselView
Active Trim
8M0215645_Mercury_BrandBook_2023_Web.pdf