QSB4.5 Marine Engine
QSB4.5 is a 4.5L medium-duty marine engine, designed for mid-sized fishing boats, tour vessels, marine generator sets, and government boats, balancing power and fuel efficiency, making it a mainstream choice for medium-sized vessels.
Key Specifications
- Configuration: 4-cylinder in-line, four-stroke
- Displacement: 4.5 liters
- Bore × Stroke: 107 mm × 124 mm
- Aspiration: Turbocharged + water-to-air aftercooled
- Fuel System: High-pressure common rail electronic fuel injection
- Exhaust Type: Wet Exhaust
- Rated Power: 200-300 hp (147-220 kW)
- Rated Speed: 2600–3000 rpm
- Max Torque: 450–700 N·m (at 1500-1600 rpm)
- Cooling Method: Liquid-cooled
- Fuel System: High-Pressure Common Rail (HPCR)
- Applications: Mid-sized fishing boats, tour vessels, marine generator sets, government boats
Key Technologies & Advantages
- Power & Fuel Efficiency
- High-pressure common rail system improves fuel atomization for excellent fuel economy to reduce navigation costs.
- Turbocharger system delivers quick low-speed torque response to adapt to changing sea conditions.
- Comfort & Reliability
- Low-vibration design enhances passenger comfort, ideal for tour/passenger vessels.
- Reinforced structure offers excellent fatigue resistance, suitable for long-distance navigation.
- Marine Environment Adaptability
- Salt-spray resistant and waterproof sealing design, with anti-corrosion treatment, adapts to marine environments.
- Customizable cooling and intake/exhaust systems are available to adapt to different vessel types.
- Maintenance & Service Support
- Modular design enables easy maintenance with high parts commonality.
- Multi-scenario Adaptability
- Can be used as main propulsion power or generator sets, adapting to the diverse needs of medium-sized vessels.
Contact us now for price, lead time, and technical support.
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.
