The Yanmar 6LY2A-STP is a high-performance, 4-stroke, 6-cylinder turbocharged marine diesel engine that delivers 440hp at 3300 rpm. Designed for high-speed commercial and recreational vessels, this engine is known for its exceptional power, fuel efficiency, and durability. The 6LY2A-STP is equipped with mechanical fuel injection, ensuring reliable performance, and is turbocharged with an intercooler for maximum power output.
The freshwater cooling system helps to maintain stable engine temperatures, extending the engine’s lifespan by reducing internal corrosion and heat stress. This engine is ideal for commercial operators and boaters who demand high power and performance for demanding applications such as fast ferries, patrol boats, or leisure yachts.
Technical Specifications:
- Engine Model: 6LY2A-STP
- Engine Type: 4-stroke, 6-cylinder, vertical in-line, water-cooled diesel engine
- Displacement: 5.813 litres (5813 cc)
- Bore x Stroke: 106 mm x 110 mm
- Power Output: 440hp (324 kW) at 3300 rpm
- Compression Ratio: 18.3:1
- Fuel System: Mechanical direct injection
- Turbocharged: Yes, with intercooler
- Cooling System: Freshwater cooling with heat exchanger
- Alternator Output: 12V – 80A
- Lubrication System: Forced lubrication by gear pump
- Oil Capacity: 17.5 litres
- Starting System: Electric start
- Direction of Rotation: Counterclockwise (viewed from flywheel)
- Dry Weight: Approx. 740 kg
- Gearbox Options: ZF marine transmission options
- Exhaust System: Water-cooled exhaust manifold
- Fuel Consumption: Approx. 109 litres/hour at max power
Key Features:
- Turbocharged with Intercooler: Delivers high power and torque for fast, efficient performance in high-speed applications.
- Mechanical Fuel Injection: Ensures reliable performance and fuel efficiency.
- Freshwater Cooling System: Protects the engine from internal corrosion and maintains optimal operating temperature.
- Durable Construction: Engineered for tough marine environments, perfect for commercial and recreational high-speed vessels.
- Compact Design: Fits easily in tight engine compartments.
- High Power Output: Provides 440hp for fast, demanding marine applications.
Yanmar is a global leader in marine engine technology, offering reliable, high-performance diesel engines that meet the needs of commercial and recreational boaters alike. The Yanmar 6LY2A-STP is renowned for its robust construction, turbocharged performance, and efficient fuel consumption, making it ideal for high-speed marine operations.




