John Deere PowerTech radiator-cooled, dry-exhaust manifold engines are compliant with EPA Marine Tier 3 emissions regulations and engineered to run vessels auxiliaries such as pumps, winches, deck cranes, and hydraulics. We also offer achoice of options and accessories. John Deere PowerTech radiator-cooled, wet-exhaust manifold marine engines are rated to provide dependable auxiliary power for oceangoing vessels and other applications that require type approval for marine classification societies.