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CCEC NTA855 – M450 Marine Engine

CCEC NTA855-M450 (1800 RPM) Marine Main Engine is 6-cylinder inline, 14 liters four-stroker engine with 140 mm (5.5 in) bore and 152 mm (6.0 in) stroke.

NTA855-M450 Marine Main Engine equipped with PT Fuel System, comes with turbocharger and Water-Air intercooler, this marine diesel engine compiles with IMO-NOx requirements of the International Maritime Organization (IMO). The continuous power at 1800 RPM of CCEC NTA855-M450 Marine Main Engine is 450 HP (336 kW).

Based on standard CCEC marine main engines, SeaMac provides both heat exchanger cooling and keel cooling marine main engines, we also provide complete propulsion system that including marine engine, gearbox, shaft, propeller as complete power system.

SeaMac provides full life cycle services for all our customers, from design to power system supply, from installation to commissioning, from after-sales service training to spare parts supply, from trouble shooting to overhaul technical support.

All of CCEC marine main engine are comes with dry type exhaust system, which means dry type exhaust manifold and dry type turbocharger, SeaMac provides upgrading services for water-cooled exhaust system, which modify dry type exhaust system into water-cooled exhaust system, which are quite important and often requested by passenger boat projects.

Advantages of CCEC NTA855 – M450 Marine Engine

  • NT series marine engine has stable performance, sufficient combustion, low failure rate, fast starting, good acceleration, strong cooling, high injection pressure, perfect detection characteristics, good transient response, high reliability and durability.

  • It meets the requirements of IMO TIER2 emission regulations, and adopts CMI high-efficiency supercharger and high-efficiency intercooler to make the engine run efficiently, and the application of low-temperature intercooler technology greatly reduces fuel consumption and emissions, while enhancing engine reliability.

  • With high injection pressure, overspeed protection, low-pressure fuel supply, fewer pipelines, and low failure rate, it can ensure full fuel combustion and achieve high-efficiency energy-saving effects. The equipped ESTC electronic oil timing control valve can accurately supplement and adjust the timing and improve the combustion smoke color at low idle speed.

  • Overall modular design, block integration, compact structure, detachable parts, high reusability.

  • Cylinder block and cylinder head adopt integrated design, low failure rate, excellent lubrication system, low parasitic power, durability and excellent reputation.

Technical Specifications

Basic Introduction of CCEC NTA855 – M450 Marine Main Engine

Engine Model:NTA855 – M450
Engine Type:6 Cylinders, in Line
Displacement:855 in3 / 14 L
Rated Power / Speed:450 HP @ 1800 RPM
Aspiration Method:Turbocharged & Water-Air Intercooler
Emission Standard:Euro II
Bore * Stroke:140 mm * 152 mm
Packing Size (L * W * H):1534 mm * 781 mm * 1355 mm
Dry Weight:1303 kg
Lead Time:15-30 Working Days
Payment Terms:T / T , L / C

coming soon

Engine Model

Advertised Power


Compression Ratio

Fuel System

NT855 – M147110 kW (147 HP) @ 1600 RPMTurbocharged14.5 : 1PT
NT855 – M200149 kW (200 HP) @ 1800 RPMTurbocharged14.5 : 1PT
NT855 – M220164 kW (220 HP) @ 1800 RPMTurbocharged14.5 : 1PT
NT855 – M240179 kW (240 HP) @ 1800 RPMTurbocharged14.5 : 1PT
NT855 – M250187 kW (250 HP) @ 1800 RPMTurbocharged14.5 : 1PT
NT855 – M270201 kW (270 HP) @ 1800 RPMTurbocharged14.5 : 1PT
NT855 – M300224 kW (300 HP) @ 1800 RPMTurbocharged14.5 : 1PT
NTA855 – M350261 kW (350 HP) @ 1800 RPMTurbocharged & Water – Air Intercooler14.5 : 1PT
NTA855 – M400A298 kW (400 HP) @ 1800 RPMTurbocharged & Water – Air Intercooler14.5 : 1PT
NTA855 – M400B298 kW (400 HP) @ 2100 RPMTurbocharged & Water – Air Intercooler14.5 : 1PT
NTA855 – M450336 kW (450 HP) @ 1800 RPMTurbocharged & Water – Air Intercooler14.5 : 1PT

General Infomation of CCEC NTA855 – M450 Marine Main Engine

Engine ModelNTA855 – M450ConfigurationD093348MX02
Curve No.M – 194CPL Code0990
Displacement855 in3 / 14 LBore * Stroke140 mm * 152 mm / 5.50 in * 6.00 in
Fuel SystemPTCylinders6, in Line
Advertised Power336 kW (450 HP) @ 1800 RPMAspirationTurbocharged & Water-Air Intercooler
Rating TypeHeavy DutyPeak Engine Torque @ RPMN / A
Brake Mean Effective Pressure232 PSI / 1600 kPaMinimum Idle Speed Setting575 – 650 RPM
Normal Idle Speed Variation± 25 RPMHigh Idle Speed Range Minimum1962 RPM
High Idle Speed Range Maximum2106 RPMCompression Ratio14.5 : 1
Piston Speed1791 ft/min / 9.1 m/secWeight (Dry) – Engine Only – Average2870 lb. / 1303 kg
Weight (Dry) – Engine With Heat Exchanger System – Average3150 lb. / 1430 kgInstallation Diagram No4061314


Performance Curve CCEC Cummins NTA855-M450 Marine Main Engine

System Technical Data of CCEC NTA855 – M450 Marine Main Engine

Fuel SystemFuel Consumption at Rated Speed22 GAL/hr / 83 L/hr
Approximate Fuel Flow to Pump66 GAL/hr / 249 L/hr
Maximum Allowable Fuel Supply to Pump Temperature160 °F / 71 °C
Approximate Fuel Flow Return to Tank TemperatureN / A
Maximum Heat Rejection to Drain FuelN / A
Fuel Pressure – Pump Out / Rail Mechanical Gauge163 PSI / 1123 kPa
Air SystemIntake Manifold Pressure58 in. Hg / 196 kPa
Intake Air Flow932 CFM / 440 L/sec
Heat Rejection to Ambient2391 BTU/min / 42 kW
Exhaust SystemExhaust Gas Flow2097 CFM / 990 L/sec
Exhaust Gas Temperature (Turbine Out)790 °F / 421 °C
Heat Rejection to Exhaust (Manifold)1060 °F / 571 °C
Cooling SystemSea Water Pump SpecificationsMAB 0.08.17 – 07 / 16 / 2001
Pressure Cap Rating (With Heat Exchanger Option)7 PSI / 50 kPa
Engines without Low Temperature Aftercooler (LTA) Jacket Water Aftercooled Engine (JWAC)
Coolant Flow to Engine Heat Exchanger70 GAL/min / 264 L/min
Standard Thermostat Operating Range (Start to Open)180 °F / 82 °C
Standard Thermostat Operating Range (Full Open)201 °F / 94 °C
Heat Rejection to Engine Coolant314344 BTU/min / 252 kW


Scopes of Supply of CCEC NTA855 – M450 Marine Main Engine

Exhaust System1. SilencerLubricating System1. Oil Pump
2. Bellows2. Oil Filter
Fuel System1. Fuel PumpStarting System1. Starter Motor
2. Oil Cut Solenoid Valve2. Fywheel Housing
3. Fuel Filter3. Flywheel
Charging System1. AlternatorControl System1.Stadnby Control Panel
Cooling System1. Seawater Pump
2. Heat Exchanger

Optional Accessories of CCEC NTA855 – M450 Marine Main Engine

Exhaust System1. SilencerPower  System1. Battery
Fuel System1. Float Fuel TankCooling System1. Radiator
2. Oil – Water Separator2. Cooling Fan
3. Manual Fouling Pump3. Sea Water Pump
4. Fuel Inlet and Outlet Hose4. Heat Exchanger
Remote Control System1. Sea Water Pump
2. Heat Exchanger

Committed to providing reliable premium propulsion system and power system for all kinds of ships around the world, SeaMac is a sub-brand of EMAC group that focused on maritime application. SeaMac’s ranges of products mainly inclduing marine main engine, marine gearbox, marine propellers, marine control lever system, marine auxiliary engine, marine generator set and emergency generator set.
For more information of our marine proplusion and power system products, you are welcome to visit SeaMac homepage:

Modifiable components of CCEC NTA855 – M450 Marine Main Engine

Air Intake System1. Installation Position of Air FilterStarting System1. 12 V Starter Motor for 12 V Electric System
2. Upgrade to Heavy – Duty Type Air Fitler2. Upgrading to Specified Brand and Speicifications of Starter Motor
Exhuast System1. Can Modify Installation Position and Direction of TurbochargerCharging System1. 12 V Charging Alternator for 12 V Electric System
2. Water – Cooled Exhuast Manifold2. Explosion – Proof Charging Alternator
3. Water – Cooled Turbocharger3. Upgrading to Specified Brand and Speicifications of Charging Alternator
Fuel System1. Upgrade to Fuel Fitler That Integrated With Fuel Transfer Pump and Fuel Pre – HearterEngine Auiliary Accessories1. Additional Auxiliary Systems Can Be Added for Special Applications
Engine Shut-Down System1. 12 V Solenoid for 12 V Electric SystemCooling System1. Can Modify Engine Into Keel Cooling System
2. Explosion – Proof Solenoid2. N / A
Lubricating System1. Oil Pan PositionPower Output System1. Can Modify Size of Flywheel Housing and Flywheel.
2. Number of Dipstick2. Dual – Ear Flywheel Housing (for Twin – Starter System)
3. Position of Dipstick Can Choose From 6 Positions3. Some of Models Can Modify Flywheel Housing Into Pto Integrated Type
4. Can Modify Oil Filter to Be Remote Installation4. Engine Have Connecting Port of Ptos, That Able to Provide Power Output
Engine Mounting System1. Can Modify Engine Mouting Bracket

Note: All Above Data are Just for Reference, All Data Might Change Without Notices or Updates, Please Contact Our Sales Team to Confirm All Details Via WhatsApp or Email.


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