Nanni marine diesel engine N6.405 with ZF Hurth reversing gear CR2INVZF85AR=2.50:1

Nanni N6.405 CR2 with ZF Hurth ZF 85 A (R=2.50:1) The Nanni N6.405 CR2 is a 6-cylinder in-line marine diesel engine built on a 6.8-liter John Deere engine block. It produces an output of 298 kW (405 hp) at a rated speed of 2700 rpm. This high-performance common-rail power unit features replaceable wet-type cylinder liners, 4 valves per cylinder, a turbocharger, and an air-to-seawater aftercooler. This complete propulsion package comes equipped with a heavy-duty hydraulic ZF Hurth ZF 85 A marine gearbox featuring an 8° down angle output and a high-torque 2.50:1 reduction ratio for optimized thrust and ultimate durability under heavy loads. The package includes a closed cooling system with a heat exchanger, a transmission oil cooler, and a 24V electrical system with a 50-Amp alternator. Holding an M4 duty rating (up to 3000 annual operating hours with a load factor up to 40%), the engine complies with RCD2 2013/53/EU, EPA Marine Tier 3, and IMO Marpol Annex VI emission standards.