Cummins Tier 3 Marine Engines

Posted on August 26, 2011

Cummins Inc. has announced the development of a line of EPA Tier 3 engines for marine applications. Building on the existing Tier 2-certified product line, the engines will range from 6.7 to 60 L in displacement with ratings from 150 to 2700 hp and will incorporate advanced combustion technology that the company said will enable them to reduce emissions in-cylinder without aftertreatment.

The EPA’s Tier 3 marine regulations take effect Jan. 1, 2012 for engines between 3.5 and 7.0 L per cylinder and continue through 2014. The QSK60 is the only engine in Cummins marine portfolio requiring Tier 3 certification in 2012, the company said. The QSK19, QSK38 and QSK50 are not required to meet EPA Tier 3 until Jan. 1, 2013.

The Tier 3 certified QSK60 features the same premium base engine hardware and footprint as the existing MCRS product, Cummins said. Further, the lubrication, cooling, air handling, fuel and exhaust systems are the same design as the current 60 L product ensuring minimum disruption for series-built vessels or replacement engines, the company said.

As with Tier 2, the Tier 3 engine will be available with Cummins C Command panels, the Centinel oil management system and the Eliminator filter. Production on the first Tier 3 marine engines is scheduled to begin in early 2012.