Description
Cummins QSL9 525HP Marine Diesel Engine
The Cummins QSL9 525HP Marine Diesel Engine is a powerful and reliable marine propulsion engine engineered for demanding commercial vessels, offshore service boats, patrol craft, and high-performance sportfishing yachts. Built on the trusted Cummins QSL9 platform, this 9-liter inline-6 turbocharged diesel engine delivers strong torque, dependable operation, and excellent fuel efficiency for vessels operating in coastal, offshore, and inland waters.
At Coastal Wave Marine, the Cummins QSL9 525HP Marine Engine is supplied as a brand-new genuine Cummins marine propulsion engine, configured with standard manufacturer accessories and prepared for professional marine installation. The QSL9 series is widely recognized across the marine industry for its durability, compact footprint, and ability to deliver consistent propulsion power even under continuous heavy load conditions.
Powered by an advanced high-pressure common-rail fuel system and electronic engine control module (ECM), the engine provides precise fuel delivery and optimized combustion efficiency. This technology improves fuel economy, reduces smoke emissions, and ensures smooth throttle response throughout the operating range. Cummins engineered the QSL9 platform with a turbocharged and aftercooled air system, enabling the engine to produce high horsepower output while maintaining dependable thermal management.
The Cummins QSL9 525HP marine diesel engine is also valued for its high power-to-weight ratio, allowing vessel builders and marine engineers to maximize propulsion performance without increasing engine room space requirements. With proven performance in commercial marine fleets and private vessels, this engine is frequently selected for repower projects, vessel upgrades, and new boat construction.
Through Coastal Wave Marine’s global supply network, the Cummins QSL9 propulsion engine can be delivered worldwide with secure export packaging and documentation suitable for shipyards, marine service centers, and vessel operators.
Cummins QSL9 525HP Marine Engine Specifications
| Specification | Details |
|---|---|
| Engine Model | Cummins QSL9 Marine Diesel |
| Power Output | 525 HP |
| Engine Configuration | Inline 6-Cylinder, 4-Stroke Diesel |
| Displacement | 8.9 Liters |
| Bore × Stroke | 114 mm × 145 mm |
| Aspiration | Turbocharged and Aftercooled |
| Fuel System | High-Pressure Common Rail |
| Cooling System | Seawater Heat Exchanger / Keel Cooling Options |
| Electronic Control | Cummins Electronic Control Module |
| Typical Dry Weight | Approx. 907 kg (≈ 2000 lb) |
| Overall Dimensions (L × W × H) | Approx. 1174 × 842 × 1086 mm |
| Engine Rotation | Counterclockwise (facing flywheel) |
| Application | Marine Propulsion |
| Engine Condition | New |
| Manufacturer | Cummins Marine |
The QSL9 platform features an inline 6-cylinder configuration, 8.9-liter displacement, turbocharged aftercooling, and high-pressure common-rail injection, which together deliver strong torque and efficient marine propulsion performance.
Key Features of the Cummins QSL9 525HP Marine Propulsion Engine
High-Performance Marine Power
The 525 horsepower output provides reliable propulsion for demanding vessel operations including commercial fishing fleets, offshore support vessels, and high-speed patrol boats.
Advanced Electronic Engine Control
Cummins electronic control systems continuously monitor engine parameters to optimize fuel injection timing, improve combustion efficiency, and maintain consistent engine performance.
Fuel Efficiency and Long-Range Operation
The common-rail fuel injection system improves atomization and combustion efficiency, helping reduce fuel consumption while maintaining strong torque throughout the RPM range.
Proven Reliability for Marine Duty
The QSL9 engine platform is designed for continuous marine operation, offering robust internal components, durable sealing systems, and corrosion-resistant materials for long service life.
Repower and New Build Flexibility
With its compact design and strong performance characteristics, the Cummins QSL9 marine diesel engine is widely used in repowering existing vessels or installing in new vessel builds where reliable propulsion is essential.
Typical Vessel Applications
The Cummins QSL9 525HP Marine Diesel Engine is commonly installed in:
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Commercial fishing vessels
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Offshore service boats
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Sportfishing yachts
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Patrol and security vessels
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Passenger transport boats
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Workboats and utility vessels
Global Supply and Export Support
Coastal Wave Marine supplies new Cummins marine engines, propulsion systems, marine generators, and marine gearboxes to clients worldwide. Engines can be shipped to shipyards, vessel operators, and marine service facilities with professional export handling.
Available supply services include:
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International shipping and export documentation
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Marine transmission pairing options
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Engine configuration consultation
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Export crating for sea or air freight
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Support for vessel repower projects
Request a Quote
If you are searching for a Cummins QSL9 525HP Marine Diesel Engine for sale, Coastal Wave Marine provides global access to genuine marine propulsion engines with international delivery options. Contact our team to request pricing, configuration details, and shipping arrangements for your vessel or marine fleet.
