John Deere Power Systems (JDPS) announced new Marine Tier 3 PowerTechTM 4.5L and 6.8L propulsion and generator-drive engines. John Deere will meet U.S. EPA Marine Tier 3 emissions regulations that began to take effect in 2009 based on cylinder displacement and power per displacement with a complete lineup of PowerTech 4.5L and 6.8L propulsion and generator-drive engines. They also will achieve compliance with IMO Tier II emissions regulations and EU 97/68/EC. New EPA Marine Tier 3 regulations will impact John Deere 4.5L and 6.8L engines beginning January 1, 2013.