With torque performance you can feel, the new 6GY135W from Yanmar is a durable, purpose-built marine engine with the YXH-160 gearbox precisely engineered and load tested together for the ultimate performance and reliability. The 6GY135W generates power up to 803hp (599kW), and is EPA Tier 3 and IMO Tier II Compliant. It features extremely quiet operation, a 500-hour oil service intervals, and improved fuel efficiency across the load range.