Featuring a host of engineering innovations, the MerCruiser 4.5L series establishes new standards for power-to-weight ratio, driver experience, acceleration, durability, and ease of maintenance.

Advanced MPI
The multi-point electronic fuel injection system fine-tunes the air-to-fuel ratio for the ideal combination of power and efficiency.

Ample charging output
A powerful alternator delivers 70 amps of charging power at wide-open throttle – perfect for keeping onboard electronics running long into the fun.

Adaptive Speed Control
The 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.

Engine guardian
Explore 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.

SeaCore
Take on the toughest marine conditions with the available SeaCore® system. It is an entire package of durable, corrosion-fighting technology that offers an extraordinary level of protection, including hard-coat anodisation on the drive, stainless-steel fasteners and components, and a closed cooling system.