Fond du Lac, Wisconsin-based Mercury Marine unveiled its brand new MerCruiser 6.2-liter V-8 sterndrive on July 21, available in 300hp and 350hp versions. The engine, which is already being shipped, was made available for testing on a variety of vessel types at Mercury's recent media event held in Charlotte, North Carolina.
Like the company's 2014 introduction of the 4.5L V6 sterndrive, the 6.2L is specifically built as a marine engine – replacing the MerCruiser 350 MAG and 377 MAG models – and is manufactured at Mercury's world headquarters in Fond du Lac. The 6.2L gains the technological improvements of the 4.5L and a few additional features, including a new air-intake resonator and Active Trim (which will eventually be applied to the engine builder's lineup from 40hp and up).
On-water testing aboard a series of 23-foot-and-up bowriders displayed the 6.2L's responsiveness, power and torque as well as its ability to deliver a quiet and smooth ride on numerous vessel types.
"With the introduction of our new 6.2-liter V-8 sterndrive engines, Mercury continues to build on its success of designing and manufacturing propulsion systems that deliver the most intuitive, powerful, worry-free, smooth and quiet boating experience,' said John Pfeifer, President of Mercury Marine. "Like the purpose-built 4.5-liter V-6 sterndrives we introduced a year ago, we're extremely proud of the remarkable reliability and ease of maintenance delivered by the 6.2. This is a terrific engine platform that will improve boating everywhere.'
Mercury has been quick to point out that its latest generation of sterndrive blocks are made specifically for marine use, rather than adapting and ‘marinizing' a GM automotive engine. The addition of the 6.2L brings the company's lineup of marine purpose sterndrives to four, including the 4.5L, 8.2L HO/MAG and 8.6L 540/520.
Power, Acceleration and Performance
The MerCruiser 6.2L engine features a long runner scrolled intake manifold designed to optimize airflow for increased acceleration and boat performance.
MerCruiser's 350hp 6.2L is said to raise the performance bar. According to Mercury, the sterndrive offers a 10 percent torque increase in the mid-power range and a 10 percent increase in speed in the higher rpm range over the older 377 MAG it supersedes.
Meanwhile, the 300hp version of the 6.2L edges out MerCruiser's 350 MAG in acceleration, moving a Sea Ray 250 SLX from 0 to 20mph in 5.75 seconds versus the 350's 6.89 seconds. However, that said, the new 6.2L 300hp and 350 MAG each pushed the 5,880-pound Sea Ray to an equal top speed of 48.7mph.
The 6.2L V-8 also offers Adaptive Speed Control (ASC), which automatically maintains a set rpm point regardless of load or condition changes, such as tight turns, tow-sports and lower speeds on plane. This means the driver no longer needs to make continual throttle-control adjustments.
Optionally, the 6.2L V-8 with DTS is available with Axius Joystick Piloting for Sterndrives, making docking a cinch for even the newest boaters.
"The new 6.2-liter V-8 engine is another outstanding example of a Mercury product designed from the ground up with technologies, design features and materials that deliver unmatched value to our marine customers,' said David Foulkes, chief technology officer for Brunswick Corporation and Vice President of Mercury Product Development, Engineering and Racing. "It joins our extensive and proven portfolio of products that provide exceptional performance, fuel economy, durability, smoothness and quietness, combined with intuitive operation, service and maintenance.'
Smooth and Quiet
Multiple advancements on the 6.2L combine to offer a more pleasant cruise. An air-intake resonator suppresses harsh sound frequencies throughout the engine operation range for a quieter experience while underway. Like the 4.5L, the 6.2L also has aft-facing throttle body that directs noise away from the cockpit. Also, larger engine mounts isolate engine vibration and reduce resonant vibration sounds, making the ride event quieter and smoother.
Durability and Corrosion-Resistance
Offering an anti-corrosion protection system, Mercury's new V-8 uses a combination of rugged cast-iron components wherever the engine encounters raw water as well as composites and marine alloys for lightweight efficiency in other places.
A convenient freshwater flush system helps ensure the engine's long-term durability, corrosion-resistance and ease of maintenance.
Simplifying Maintenance and Service
A maintenance center can be found near the top-front section of the 6.2L, a feature Mercury has begun to incorporate into its outboard engines as well. This helps ensures that consumer touchpoints such as the 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 6.2L V-8 also has a ‘season extending' drain system that can keep people boating during the transition times between seasons.
Another new consumer benefit is the elimination of the traditional 20-hour service.
The 6.2L is available with optional freshwater cooling and the SeaCore drive corrosion protection treatment, which provides extra corrosion protection only when needed, such as saltwater environments. Freshwater cooling uses a heat exchanger and coolant fluid to maintain engine temperature, rather than raw water from a lake or ocean. The coolant travels through the entire engine and the exhaust manifolds, and is designed to prevent internal corrosion of the cooling passages. The SeaCore drive is a hard-anodizing process that alters the surface layer of the aluminum drive casting to prevent saltwater penetration that leads to corrosion.
The 6.2L V-8 300hp and 350hp engines qualify for Mercury's current Power of Protection Sales Event, providing five years of coverage – two years of Mercury Limited Warranty and three years of Mercury Extended Service. The 6.2L also comes with three years of anti-corrosion warranty.