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Cummins 6LTAA8.9-M315 Propulsion Engine: The Reliable 315HP Marine Power Solution
The Cummins 6LTAA8.9-M315 marine engine is a high-performance 8.9L inline 6-cylinder diesel engine designed for continuous-duty marine propulsion. As part of the proven Cummins L-series platform, this model delivers 315 HP at 2134 RPM, making it an ideal solution for commercial vessels requiring reliable power and fuel efficiency.
Supplied by HekoPower as a trusted engine supplier, the DCEC 6LTAA8.9-M315 propulsion engine is widely used in fishing vessels, tugboats, small cargo ships, and passenger boats. Its turbocharged and aftercooled design ensures optimal combustion efficiency, lower fuel consumption, and extended engine life.
Tech Specs of Cummins 6LTAA8.9-M315
General Engine Data
Engine Model: Cummins 6LTAA8.9-M315
Type: 6 Cylinders, in Line
Displacement: 8.9 L
Bore * Stroke: 114 * 145
Net Weight (with flywheel & alternator): 674 Kg
Overall Dimension: 1360mm*780mm*988mm
Engine Configuration No.: D563014MX03
Key Performance Data
Rated Power/Max Power: 230 kW/315 HP, 253KW/344 HP
Rated Speed/Max Speed: 2134 rpm/2200 rpm
Low Idle Speed: 600-800 rpm
High Idle Speed: 2430 rpm
Fuel Consumption (Running Speed): ≤ 64 L/hr
Torque/Rated Speed: 1100 N.m @ 2134 rpm
Max Torque/Speed: 1350 N.m @ 1400 rpm
More Technical Data
Certification: CCS Certificates
Aspiration: Turbocharged and Charge Air Cooled
Compression Radio: 16.6:1
Fuel System: Bosch P7100 Pump/RQV-K Governor
Governor Type: Mechanical Control
Starting System: Electrical Start (12V/24V)
Lowest Starting Temp Without auxiliary system: -12℃
Cooling Method: Sea water pump, Heat exchanger, Water cooled
Engine Cooling Fluid Volume: 11.1 L
Torque, Fuel Consumption & Comparative Advantages
The Cummins 6LTAA8.9-M315 torque curve and fuel consumption are optimised for propulsion load, ensuring strong low‑speed torque and reduced fuel waste. When comparing Cummins marine engine 8.9L vs 8.3L, the 6LTAA8.9 series provides higher power reserve and better durability. The difference between Cummins 6LTAA8.9-M300 vs M315 lies mainly in rated power and fuel mapping, while the 6LTAA8.9-M315 vs 6CTA8.3 marine engine offers stronger performance for heavier vessel loads.
Application Scenarios for Commercial Vessels
The Cummins 6LTAA8.9-M315 commercial vessel engine serves multiple working scenarios:
- Fishing boats: Reliable for long‑distance fishing operations
- Tugboats: Suitable for the 300–350HP range marine diesel engine demand
- Small cargo vessels: Stable power for short‑sea transportation
- Passenger boats: Smooth operation and low vibration
HekoPower specialises in supplying the 6LTAA8.9-M315 for fishing boats, cargo ships, and passenger vessels, supporting both newbuilding and replacement 8.9L Cummins engine for fishing boat repower projects.
Propulsion System & Gearbox Matching Solution
Complete Marine Propulsion Package
HekoPower provides a Cummins 6LTAA8.9-M315 complete propulsion solution, including:
- Marine gearbox matching
- Propeller shaft system
- Cooling configuration
- Control system integration
The best gearbox matching for Cummins 315HP marine engine depends on vessel type, load requirements, and operating conditions.
Engine + Gearbox + Propeller Matching
A properly designed marine engine + gearbox + propeller matching system ensures:
- Maximum propulsion efficiency
- Reduced fuel consumption
- Extended service life
Comparison with Other Cummins Marine Engines
6LTAA8.9-M300 vs M315 Differences
Compared to the M300 model, the M315 provides:
- Higher output power
- Improved acceleration
- Better load capacity
Cummins 8.9L vs 8.3L Marine Engine
Compared to the 6CTA8.3:
- Larger displacement (8.9L vs 8.3L)
- Higher torque output
- Better suitability for heavier vessels
Why Choose HekoPower as Your Supplier
As a professional supplier, HekoPower provides:
- Genuine Cummins marine engines
- Complete propulsion system solutions
- Technical consultation for shipbuilding projects
- 12-month warranty support
Whether you want to buy genuine DCEC 6LTAA8.9-M315 marine engine or need a full propulsion package, HekoPower ensures reliable delivery and technical expertise.
Cummins L8.9-M Series (L8.9 Marine Engine), marine propulsion engines for commercial and recreational applications, original products from Dongfeng Cummins Engine Plant (DCEC), Cummins Joint Venture Plant since 1986, 50% shareholding by Cummins USA. This series mainly includes 6LTAA8.9-M300, 6LTAA8.9-M315. All engines complete with sea water pump, heat exchanger, CCS/IMO certificates.
