Details
Cummins NTA855-M240 Marine Propulsion Diesel Engine (179kW / 240HP)
When vessel operators select a 14-liter class propulsion unit, the margin for error is razor-thin. The Cummins NT855-M240 6-cylinder 14 liter marine engine is built by CCEC to deliver continuous, heavy-duty torque under demanding marine conditions. Operating at a rated output of 179kW (240HP) at 1800 RPM, this turbocharged aftercooled diesel engine utilizes a robust 140x152 mm bore and stroke architecture designed specifically for sustained workboat schedules.
Unlike higher-rated iterations in the same family, the M240 is intentionally tuned for lower thermal and mechanical stress. By moderating output to 240HP, the combustion chamber maintains lower peak pressures, which directly extends overhaul intervals. Operators frequently misidentify this unit as a standard automotive or generator-drive block converted for marine use. In reality, the genuine CCEC NT855-M240 integrates a specialized marine gear-driven seawater pump, an engineered freshwater heat exchanger expansion tank, and a corrosion-resistant keel or raw-water cooling circuit that cannot be substituted with land-based components.
Tech Specs of Cummins NTA855-M240
General Engine Data
Engine Model: Cummins NTA855-M240
Type: 6 Cylinders in Line
Displacement: 14 L
Bore * Stroke: 140 * 152
Net Weight (with flywheel & alternator): 1385 Kg
Overall Dimension: 1453mm*947mm*1296mm
Engine Configuration No.: D092347MX02
Key Performance Data
Rated Power: 179 kW/240HP
Rated Speed: 1800 rpm
Low Idle Speed: 575-675 rpm
High Idle Speed: 1962-2106 rpm
Rating Type: Continuous Running Power
Fuel Consumption (Running Speed): ≤ 47 L/hr
Max Torque/Speed: 1044 N.m @ 1300 rpm
More Technical Data
Certification: CCS/IMO Certificates
Governor Type: Mechanical Control
Aspiration: Turbocharged/Aftercooled
Compression Radio: 14.5:1
Fuel System: Cummins Pressure Time (PT Pump)
Starting System: Electrical Start (24V/100AMP)
Lowest Starting Temp Without auxiliary system: -12℃
Cooling Method: Sea water pump, Heat exchanger, Water cooled
Technical Comparison: Why Select the 240HP Tier Over Adjacent Models?
Choosing the correct power band within the NT855 family requires a clear understanding of vessel load profiles. A common misconception among buyers is that jumping to a higher horsepower variant always yields better performance.
When evaluating the NT855-M240 vs NT855-M220, the M240 provides an additional 20 horsepower, giving small commercial tugs and displacement hulls the extra thrust needed against heavy river currents without pushing fuel consumption past economical thresholds. Conversely, when comparing the Cummins NT855-M240 vs NTA855-M300 or looking at a 240HP vs 250HP Cummins marine engine, the differences lie in duty cycles and turbocharger matching. While an M300 or M270 offers higher top-end speed, it demands cleaner fuel management and subjects the drive train to higher continuous torsional vibration.
For operators running displacement fishing hulls or cargo barges at constant speeds, the Cummins 179kW vs 187kW marine engine comparison favors the M240 for its optimal balance of thermal efficiency and torque backup. It prevents the engine from lugging under sudden wave resistance while keeping exhaust gas temperatures within safe limits.
Real-World Application Scenarios for the 14L Marine Diesel
The Cummins 240HP NTA855-M240 for coastal fishing boats is a preferred choice because of its low-end grunt. Coastal trawlers require substantial propeller torque at low shaft speeds during net hauling, and the 14.5 compression ratio combined with the proven PT fuel pump marine engine layout delivers instantaneous throttle response.
Another primary application is found in inland waterway cargo vessels and double-ended passenger ferries. These vessels operate upwards of 16 hours a day in shallow, silt-heavy waters. The NT855-M240 1800 RPM marine engine handles the abrasive sediment loads exceptionally well when paired with a robust raw-water filtration system. Because HekoPower functions as a direct industrial engine supplier, we frequently supply these power packs to marine retrofit yards looking to replace older, smoke-heavy two-stroke units with a clean-running, mechanical governor marine engine that meets local tier requirements without complex electronic control modules.
Maintenance, Troubleshooting, and Replacement Strategies
Sourcing a genuine CCEC NT855-M240 complete marine engine for sale requires close attention to factory configuration markers. Before ordering a replacement, operators must verify the engine configuration number and the specific CPL number stamped on the gear cover data plate.
A frequent technical misconception involves mixing up automotive and marine-grade NT855 cylinder heads and camshafts. Using a truck specification camshaft in an NTA855-M240 replacement engine will alter valve overlap, severely reducing low-end marine torque and causing overheating under load.
- Fuel System Care: The PT fuel pump requires strict water separation. Even minor moisture contamination in marine environments can score precision injector plungers.
- Cooling Maintenance: Inspect the zinc anodes inside the seawater pump heat exchanger every 250 operational hours to prevent galvanic corrosion of the tube bundle.
- Torsional Vibration: Always verify alignment between the marine reduction gear and the flywheel housing to prevent premature rear crankshaft seal failure.
Explore the Complete Cummins Marine Propulsion Series
When planning a fleet upgrade or seeking matching auxiliary units, evaluating the broader engine family ensures structural compatibility across your vessel layout. This series mainly includes a comprehensive range of heavy-duty power configurations designed for commercial marine operations.
As you review our broader catalog, remember that HekoPower also supports related propulsion lines, including the higher-output KTA series and compact auxiliary drives. Cummins N855-M Series (N855 Marine Engine), marine propulsion engines for commercial and recreational applications, original products from Chongqing Cummins Engine Plant(CCEC). This series mainly includes NTA855-M350, NTA855-M400, NTA855-M450, NTA855-M200, NTA855-M220, NTA855-M240, NTA855-M250, NTA855-M270, NTA855-M300. All engines complete with sea water pump, heat exchanger, CCS/IMO certificates.
Frequently Asked Questions
What is the exact Cummins NTA855-M240 fuel consumption per hour at 1800 RPM?
Under 100% full continuous load, the engine consumes approximately 46 to 48 liters per hour. At a typical 75% cruising load, fuel consumption drops significantly to around 34 to 36 liters per hour, depending on hull hydrodynamics and propeller pitch.
Can I use an NTA855-M240 replacement engine to substitute an older NT855-M250?
Yes, but you must recalibrate or verify your marine transmission rating and propeller sizing. Because the M240 operates at a slightly different fuel rate curve, dropping down from a 250HP rating requires checking your maximum vessel speed under full load to avoid over-pitching.
Does HekoPower provide the complete accessories with the engine assembly?
As a dedicated supplier, HekoPower provides comprehensive engine packages including the turbocharger, intercooler, seawater pump, heat exchanger, starter motor, and alternator, tailored to your exact vessel specifications.
Where can I buy a genuine CCEC Cummins NTA855-M240 diesel engine?
You can buy authentic units directly through HekoPower, a trusted genuine CCEC Cummins NTA855-M240 supplier. Every engine comes with a verifiable factory serial number, official CCEC performance test sheets, and an international warranty.
How does the NTA855-M240 differ from the NTA855-M300 version?
The differences lie entirely in the internal fuel pump calibration, injector cup sizes, and turbocharger boost settings. The M240 is detuned to 240HP to maximize continuous component lifespan and fuel thriftiness, whereas the M300 is tuned for higher power outputs.
Does this engine comply with current global marine emission standards?
The CCEC NTA855 mechanical series is generally optimized for IMO Tier I or specific regional non-emission regulated waters due to its mechanical nature. Contact our sales department to verify if this model meets your specific flag state registry rules.
Can HekoPower supply matching marine gearboxes?
Yes. As a full-service Chongqing Cummins marine engine distributor, we can provide a complete propulsion package. This includes matching Advance, Twin Disc, or Dong-I marine gearboxes with ratios configured specifically for your vessel's propeller pitch.
