Mercury News

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Mercury Marine launches MerCruiser 4.5L 200hp sterndrive unit

Mercury Marine this week is introducing its 4.5L 200hp sterndrive, which was designed and is manufactured at Mercury Marine’s world headquarters in Fond du Lac, Wisconsin. The 4.5L 200hp is based on the 4.5L 250hp sterndrive introduced by Mercury in May 2014.

The MerCruiser 4.5L established new standards for acceleration and overall performance, thanks to design innovations such as a long runner scrolled intake manifold and high displacement, which produces an outstanding power-to-weight ratio.

The 4.5L delivers maximum fuel efficiency and exceptionally quiet operation. Its 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 superior sound quality and smoothness from idle all the way through the power band for a better boating experience.

The 4.5L V-6 also offers Adaptive Speed Control (ASC), which automatically maintains the set rpm point regardless of load or condition changes, such as tight turns, tow sports and lower speeds on plane. The result is increased throttle response and a “sportier” feel for the driver, who no longer has to make continual throttle-control adjustments.

Mercury Marine built the ultimate anti-corrosion protection system into the 4.5L V-6, using durable cast-iron componentry wherever the engine encounters seawater, and corrosion-resistant aluminum and composites everywhere else. Digital rather than analog sensors are used throughout. As with all MerCruiser engines, the 4.5L sterndrive comes with a standard three-year corrosion warranty, plus Mercury’s limited manufacturer’s warranty of up to two years.

Mercury paid particular attention to ease of maintenance when designing the MerCruiser 4.5L V-6, eliminating the need for the traditional “20-hour service.” This unit features a maintenance center near the top-front section of the engine, ensuring that consumer touch-points – including oil filter and fill – are easily identifiable and accessible. Additionally, the valve train is maintenance-free for the life of the engine, and a QR code on the engine’s service label allows smartphone users to access “how-to” videos online. The 4.5L V-6 also boasts a “season-extending” drain system that can keep you boating during the transition times between seasons.

Available in single or twin installations and compatible with Mercury’s Alpha drive, the MerCruiser 4.5L offers ultimate flexibility to OEMs, marine dealers and consumers in creating the ideal propulsion package for a wide range of boats, from runabouts to cruisers. The engine’s smaller size leaves extra space for additional options by boatbuilders.