QSB6.7 Marine Engine
QSB6.7 is a 6.7L in-line 6-cylinder fully electronic turbocharged and Water-to-air aftercooled diesel engine engineered specifically for medium-sized marine vessels, widely used as main propulsion or marine generator set power for medium cargo ships, tugboats, government service boats, tour vessels, and offshore working vessels. It stands out for its efficient power output, proven reliability, and superior adaptability to marine environments, making it a mainstream choice for shipowners worldwide.
Key Specifications
- Configuration: 6-cylinder in-line, four-stroke
- Displacement: 6.7 liters
- Bore × Stroke: 107 mm × 124 mm
- Aspiration: Turbocharged + water-to-air aftercooled
- Fuel System: High-pressure common rail electronic fuel injection
- Exhaust Type: Dry Exhaust / Wet Exhaust
- Rated Power: 300-420 hp (220-309 kW)
- Rated Speed: 2600–3000 rpm
- Max Torque: 800–1250 N·m (at 1400–1800 rpm)
- Cooling Method: Liquid Cooling
- Cooling System: Heat Exchanger
- Applications: Main propulsion, marine generator sets, power for government/tour vessels
Key Technologies & Advantages
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Power & Fuel Efficiency
- Equipped with a high-pressure common rail electronic fuel injection system for precise fuel delivery and complete combustion, delivering robust power while achieving excellent fuel economy to reduce long-distance navigation costs.
- Paired with a variable geometry turbocharger, it provides quick low-speed torque response to handle sudden load changes from varying sea conditions, making towing and acceleration operations more seamless.
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Structural Reliability & Durability
- A high-strength cast iron block combined with a modular cylinder head design offers excellent impact and fatigue resistance, enabling long continuous operation with extended maintenance intervals and lower total lifecycle costs.
- Reinforced pistons, connecting rods, and bearing systems, along with optimized oil cooling and filtration, maintain stable performance under high-temperature and high-load conditions, minimizing downtime due to failures.
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Marine Environment Adaptability
- The entire engine features a salt-spray resistant and waterproof sealing design, with anti-corrosion coatings on key components, enabling it to resist erosion from seawater and high humidity, suitable for coastal, inland waterway, and offshore operations.
- Customizable cooling systems and intake/exhaust layouts are available to flexibly adapt to the engine room space and heat dissipation requirements of different vessel types, ensuring easy installation.
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Maintenance & Service Support
- Modular component design ensures high commonality of core parts (cylinder heads, injectors, filters, etc.), making spare parts easily accessible. Maintenance does not require full engine teardown, significantly reducing downtime.
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Multi-scenario Adaptability
- Supports dual applications as main propulsion power and marine generator sets, with options for single-engine propulsion or twin-engine parallel operation, adapting to the needs of different vessel types such as tugboats, cargo ships, and tour vessels.
- Customizable power tuning and speed configurations are available to balance power and quiet operation, making it especially suitable for noise- and vibration-sensitive tour and government vessels.
Quality Assurance & Compliance
Warehouse Storage
FAQ
A: Our core business covers diesel engine development, production, customized modification, maintenance and testing; explosion-proof engine R&D and manufacturing; Cummins spare parts supply, as well as engine overhaul and testing services.
A: Export-standard wooden box packaging
A:The specific delivery time depends on the items and the quantity of your order. We will confirm it with your detailed order.
A. Please provide us with your engine model, required rated power and speed, and application scenario. We will then recommend the most suitable model based on those information.
A: We offer professional engine customization services and can fully tailor the products to your specific requirements, with a variety of options available for pricing, specifications and configurations. The minimum order quantity (MOQ) for customized engines is 1 unit.
A:Yes, every engine is subjected to rigorous and comprehensive performance tests prior to shipment. We also provide clients with detailed test videos and electronic data.
A: EXW, FOB, CFR, CIF，DDU，DDP.
A: T/T, X Transfer, L/C, MoneyGram, PayPal, Cash etc
A:Yes, the warranty period is 6 months, covering main engine components. Consumable parts and failures caused by improper operation are excluded.
