Engine: Cummins QSK60 2700hp

Cummins Inc presented a new QSK60 series engine during the 2015 Miami boat show. The QSK series, which includes the QSK95, QSK60, QSK50, QSK38 and QSK19, has had a long, successful history of delivering great performance and durability in tugboats, crew boats and offshore supply vessels. The QSK series of engines is also used in recreational displacement and semi-displacement vessels. In response to increased demand from the recreational market, Cummins is offering a QSK60 dedicated to this market segment.  The QSK60 is a 16-cylinder engine of 60 liters displacement. The U.S. Environmental Protection Agency Tier 3 engine features a Modular Common Rail Fuel System, allowing Cummins to reduce nitrogen oxides and particulate matter in-cylinder. Other benefits of the MCRS include low noise and vibration for quiet operation, idle stability and improved low-end torque. The QSK60 has ratings between 2000hp and 2700hp.

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Engine: Cummins QSB6.7 550hp

Cummins presented its new QSB6.7 550hp during the Miami boat show, past February 2013. The Cummins 550 hp diesel engine, now offers the power density needed to reach high speed with a dedication going to the performance boat market in making of this new power unit. Diesel engines offer a number of benefits compared to gasoline engines, and this is particularly evident in the performance power boat market. Diesel engines have lower maintenance costs, better overall dependability and longer warranty coverage period. There are also significant service interval differences between diesel and gasoline engines. The Cummins QSB6.7 requires an oil change every 250 hours while an the same thing is required every 25 hours on a comparable performance gasoline engine. A comparable gasoline engine also requires valve spring replacements between 100-125 hours as well as a major refresh between 200-300 hours neither of which are required with the Cummins QSB6.7. Diesel engines provide better overall dependability than gasoline engines, as well. The Cummins QSB6.7 provides 550hp turning only 3300 RPM while a comparable gas engine provides similar hp between 5000 - 5400 RPM. Higher engine speed causes more stress and wear on the internal components resulting in a shorter life expectancy. The QSB6.7 550hp is backed by the standard Cummins 2-year/1000 hour warranty with additional 4-year/2000 hours of coverage for major components. www.cummins.com

Engine: Cummins QSB6.7 480hp

Cummins presented the new QSB6.7 at the latest 2012 Miami boat show.  This new engine offers better performance, improved sociability, and improved operations over Cummins beloved QSB5.9 model, all without sacrificing fuel economy. The initial launch of the QSB6.7 will provide both commercial and recreational ratings from 380 up to 480 hp.  The Cummins QSB6.7 provides more torque, which means better acceleration and maintained speed through turns. A pair of QSB5.9 480 hp engines installed in a pod-driven 44 feet express cruiser test boat accelerated the boat to 20 mph in 14 seconds, while the same boat powered by QSB6.7 480 hp engines accelerated to 20 mph in just 8 seconds, with little change to the legendary QSB fuel economy. The QSB6.7 also employs a new fuel calibration strategy: Unlike most marine engines, the QSB6.7 is calibrated for optimal fuel economy at cruising speeds, where the engine is most often used, rather than at wide-open throttle.  The QSB6.7 is sociably improved, capable of meeting EPA Tier 3 emissions standards. This new engine offers exceptionally low cold-start smoke levels, and significant sound reduction at cruise and rated speeds compared to the QSB5.9.  Operationally the QSB6.7 has improved with loads of new features. The standard fuel system is compatible with low lubricity fuels. With the use of Ultra Low Sulfur Diesel this engine offers extended oil change intervals, providing fewer oil changes and more time on the water. Another notable feature of the QSB6.7 is the PTO capability. The power steering and hydraulic pumps are gear driven, providing a substantial reliability improvement over belt-driven systems. For accessories that must be belt driven, such as a clutched Freon compressor, there is an additional belt driven PTO location above the seawater pump. 

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Engine: Cummins QSD2.0 170hp

Cummins MerCruiser Diesel has extended its innovative Quantum diesel technology on the QSD2.0 platform with the release of the QSD2.0-170hp for inboard applications. This propulsion system is well suited for small, single-engine boats. The new package is EPA, RCD and IMO certified, and the QSD2.0-170hp engine, first introduced last spring, will still be offered with the Bravo One, Two and Three sterndrives. As announced last fall, the QSD2.0-170 is also available with the Alpha sterndrive with a 1.62:1 gear ratio, perfect for small runabouts. The QSD2.0 is offered in ratings from 115 to 170hp. The entire 2.0 family boasts a new turbocharger for increased power and an advanced ECM with SmartCraft compatibility to monitor various engine parameters. The QSD2.0 line also features advanced components such as the integrated heat exchanger and exhaust manifold, which help reduce overall package size and weight. Impressive acceleration and precise throttle response are the result of a proven high-pressure common-rail fuel system that includes seawater aftercooling.

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