Yanmar 6LT580 Marine Engine – Long Description

The Yanmar 6LT580 marine engine is a high-performance, electronically controlled diesel propulsion system engineered for demanding recreational and light commercial marine applications. Delivering an impressive 580 metric horsepower (426 kW) at 2530 rpm, this engine is designed to provide exceptional acceleration, cruising efficiency, and reliability for modern planing and semi-planing vessels. Its compact footprint and lightweight construction make it an ideal choice for performance boats, sport cruisers, patrol craft, and workboats where power-to-weight ratio is critical.

At the heart of the 6LT580 is a robust 6-cylinder, in-line, 4-stroke configuration with an 8.71-liter displacement. The engine incorporates advanced Bosch common rail fuel injection technology combined with turbocharging and intercooling to optimize combustion efficiency, delivering smooth throttle response, reduced emissions, and improved fuel economy across the operating range. Electronic engine management ensures precise fuel delivery and monitoring, resulting in consistent performance and dependable operation even under heavy load conditions.

The engine is designed with durability and serviceability in mind, featuring a water-cooled system with heat exchanger, forced lubrication, and heavy-duty internal components engineered for long operational life. Its electronic control system integrates seamlessly with modern marine helm displays and CAN-bus networks, allowing real-time monitoring of engine data and simplified diagnostics. This connectivity enhances both vessel management and maintenance efficiency.

Environmental compliance is another key advantage of the 6LT580. The engine meets major international emissions standards, including EPA Tier 3 and EU RCD Stage 2 requirements, while also supporting cleaner fuel compatibility such as HVO (Hydrotreated Vegetable Oil). These features contribute to reduced environmental impact without compromising power output.

The Yanmar 6LT580 is available as part of a comprehensive propulsion package that can include compatible marine gearboxes, control systems, and monitoring displays. Its versatility allows installation in single or twin engine configurations across a wide range of vessel types up to approximately 55 feet, offering boat owners and operators a combination of performance, reliability, and advanced engineering that reflects Yanmar’s long-standing reputation in marine propulsion technology.