MerCruiser 7.4L 454 Blue Water Inboard Engine – Closed Cooling, No Salt

MerCruiser 7.4L 454 Blue Water Inboard Engine – Closed Cooling, No Salt

Experience raw power and marine-grade reliability with the MerCruiser 7.4L (454) Blue Water Inboard Engine. Built for serious boaters and offshore enthusiasts, this engine combines big-block performance with a closed cooling system, ensuring clean operation and long-lasting durability even in demanding marine environments. Designed to keep saltwater out of critical internal components, this powerhouse delivers dependable strength without the corrosion worries.

Big-Block Power for Unstoppable Performance

The legendary 454 cubic inch displacement delivers the kind of torque and horsepower that can handle heavy boats, long trips, and rough conditions with ease. Whether you’re cruising offshore, sport fishing, or powering a larger vessel, the MerCruiser 7.4L gives you confidence in every wave.

• 7.4L / 454 inboard marine engine

• Proven big-block power for larger boats

• Smooth and responsive acceleration

• Built for strength, endurance, and marine-grade performance

Closed Cooling System for Maximum Engine Protection

One of the standout features of this MerCruiser Blue Water engine is its closed cooling system, designed to circulate coolant internally instead of raw saltwater. This greatly reduces corrosion, extends the engine’s lifespan, and makes it a perfect choice for saltwater or mixed-environment boating.

• Closed cooling keeps saltwater out of the block

• Enhanced longevity with reduced corrosion risk

• Lower maintenance costs over time

• Dependable operation in harsh marine conditions

No Salt, No Worries – Engineered for Reliability

This MerCruiser 7.4L Blue Water engine is part of the “No Salt” series, built specifically for boaters who demand performance without compromise. By keeping corrosive saltwater away from vital components, you get a cleaner-running, longer-lasting engine that’s always ready for your next adventure.

• Designed for saltwater and freshwater use

• Marine-grade construction for extreme durability

• Dependable performance across long distances

• Trusted by offshore boaters worldwide