YANMAR 6HYM-WET 441 kW (600 mhp)

The YANMAR 6HYM-WET is a high-performance, heavy-duty marine diesel engine delivering 441 kW (approximately 600 mhp), engineered for demanding commercial and industrial marine applications. Designed with reliability, efficiency, and durability in mind, this engine is ideal for workboats, ferries, patrol vessels, and other medium to large vessels requiring consistent power under prolonged operation.

Featuring a 6-cylinder in-line configuration with advanced turbocharging and intercooling, the 6HYM-WET ensures optimized combustion, excellent fuel efficiency, and reduced emissions. The engine robust construction allows for long service intervals and straightforward maintenance, even in harsh maritime environments.

YANMAR proven engineering ensures smooth operation with low vibration, reliable torque delivery across the rpm range, and excellent responsiveness under load. Compact yet powerful, this engine delivers high performance without compromising space, making it suitable for vessels where engine room layout is critical.

Applications:

Workboats and tugs
Ferries and passenger vessels
Patrol and coast guard boats
Offshore support vessels

Highlights:

Power Output: 441 kW (≈ 600 mhp)
6-cylinder inline marine diesel engine
Turbocharged and water-cooled for optimal efficiency
Robust, durable construction for heavy-duty use
Smooth operation with low vibration and reliable torque
Easy maintenance with accessible service points

Technical Specifications

General Engine Data

Engine Model: 6HYM-WET
Engine Type: 4-stroke, water-cooled marine diesel engine with direct injection
Cylinder Configuration: 6 in-line
Total Displacement: ~8.4 L
Bore × Stroke: 115 × 125 mm
Aspiration: Turbocharged and water-cooled intercooler
Compression Ratio: 16.0:1
Flywheel & Housing: SAE standard
Dry Weight: ~1,050 kg
Cooling System: Freshwater cooling with heat exchanger; seawater-cooled circuit

Performance

Rated Power Output: 441 kW (≈ 600 mhp)
Rated Engine Speed: 2,300 rpm
Torque: ~2,200 Nm @ 1,600 rpm
Emission: Meets IMO Tier II / EPA Tier II standards (depending on year/model)

Operation & Use

Designed for medium to large commercial vessels and workboats
Provides consistent torque and smooth operation under heavy loads
Easy maintenance with accessible service points
Durable construction ensures long service life in harsh marine environments
Optimized for fuel efficiency and reliability

YANMAR 6HYM-WET

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