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DCEC 6CTAA8.3-M260 Marine Engine

DCEC 6CTAA8.3-M260 marine main engine is a 6-cylinders in line, 8.3 liters four-strokes engine with 114mm bore and 135mm stroke.

Equipped with Weifu PW fuel pump and RQV-K governor, engine comes with turbocharger and Air- Air Intercooler.

The prime power at 2134RPM of DCEC 6CTAA8.3-M260 marine main engine is 260HP.

Based on standard DCEC 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 DCEC 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 6CTAA8.3-M260 Marine Engine

  • Advanced design, exquisite manufacturing technology, reliable and durable, suitable for high-strength and heavy-duty operations under severe working conditions.

  • Using high-pressure fuel pump, combustion is more complete under high fuel injection pressure, less energy loss, strong power, strong fuel adaptability, and lower emissions.

  • Adopt Holset supercharger with integral wastegate valve, low speed responsiveness and strong power.

  • Integral cylinder design, the number of parts is about 25% less than similar products, the failure rate is lower, and the maintenance is more convenient.

  • The cylinder liner adopts a platform mesh honing design and a corrosion-resistant high-nickel cast iron piston, which greatly reduces oil loss, enhances durability, and has a longer service life.

Technical Specifications

Engine Model:6CTAA8.3-M260
Engine Type:6 Cylinders
Displacement:8.3 L
Rated Speed:1500 RPM
Rated Power / Speed:189kW @ 2134 RPM
Peak Torque:1125 N.m @ 1400 RPM
Aspiration Method:Turbocharged & Air-Air Intercooler
Emission Standard:N / A
Bore*Storke:114 mm * 135 mm
Packing Size(L*W*H):1494 mm * 796 mm * 1228 mm
Wet Weight:636 kg
Lead Time:15-30 Working Days
Payment Terms:T/T ,L/C

Coming Soon

Engine Model

Peak Torque

Rated Power

Fuel System


6CTA8.3-M188732 N.m @ 1500 RPM188 Hp @ 2328 RPMBYC PB Pump / R801 Mechanical GovernorTurbocharged & Water-Air Intercooler
6CTA8.3-M205828 N.m @ 1500 RPM205 Hp @ 2328 RPM BYC PB Pump / R801 Mechanical GovernorTurbocharged & Water-Air Intercooler
6CTA8.3-M2201000 N.m @ 1500 RPM220 Hp @ 1800 RPM BYC PB Pump / RSV Mechanical GovernorTurbocharged & Water-Air Intercooler
6CTAA8.3-M2601125 N.m @ 1400 RPM254 HP @ 2134 RPMWeifu PW2000 Pump / RQV-K Mechanical GovernorTurbocharged & Air-Air Intercooler

General Infomation of DCEC 6CTAA8.3-M260 Marine Main Engine

Engine Model6CTAA8.3 – M260Displacement8.3 L
Bore * Stroke114 mm * 135 mmAspirationTurbocharged & Air-Air Intercooler
Cylinders6 Cylinders, in LineFuel SystemWEIFU PW2000 / RQV_K
Speed ControlN / ARated Power260 BHP @ 2134 RPM
Maximum Power284 BHP @ 2200 RPMMaximum Torque1125 N.m @ 1400 RPM
Dry Weight636 kgLow Idle Speed600 – 800 RPM
Instantaneous Inertia of Rotating Parts (With Flywheel)0.37 kg.m²Distance Between Center of Gravity and Rear End Face of Cylinder Block429 mm
Distance From Center of Gravity to Center Line of Crankshaft (Above Crankshaft)212 mmHigh Idle Speed2430 RPM
Piston Speed9.6 m / secThe Ignition Sequence1 – 5 – 3 – 6 – 2 – 4

Installation Data of DCEC 6CTAA8.3-M260 Marine Main Engine

Maximum (Static) Bending Moment at Front Support Mounting Surface495 N.m
Maximum (Static) Bending Moment at Rear Face of Block1356 N.m
Maximum (Static) Bending Moment Allowed for Side-mounted BossN / A
Finished Engine Instantaneous Inertia – Turning Shaft29.8 kg.m²
Finished Engine Instantaneous Inertia- Pitch Axis76.8 kg.m²
Finished Engine Instantaneous Inertia- Partial Rotation66.8 kg.m²

Fuel System of DCEC 6CTAA8.3-M260 Marine Main Engine

Maximum Fuel Flow on the Supply Side of the Fuel Pump300 litre
Maximum Fuel Supply Restriction at Fuel Pump Iinlet-with Clean Fuel Filter Element(s) at Maximum Fuel Flow13.6 kPa
Maximum Fuel Supply Restriction at Fuel Pump Iinlet-with Dirty Fuel Filter Element(s) at Maximum Fuel Flow27.1 kPa
Maximum Fuel Drain Restriction (Total Head) Before (Or Without) Check Valve69 kPa
Maximum Fuel Inlet Temperature60

Performance Curve-DCEC Cummins 6CTAA8.3-M260 Marine Main engine

System Technical Data of DCEC 6CTAA8.3-M260 Marine Main Engine

Exhaust SystemMaximum Exhaust Back Pressure10.1 kPa
Exhaust Flow RateN / A
Exhaust Temperature570
Exhaust Heat Loss WorkN / A
Recommended Exhaust Pipe Diameter75 mm
Maximum Static Support Weight Of Supercharger Outlet Flange14 kg
Air Intake SystemMaximum Allowable Intake Resistance (Using Heavy Duty Air Filter)—Clean Element3.7 kPa
Maximum Allowable Intake Resistance (Using Heavy Duty Air Filter)—Dirty Element6.2 kPa
Use A Heavy-Duty Air Filter With Minimal Dirt Blocking Capability53 g / litre / sec
Maximum Temperature Rise Of External Air To Supercharger Inlet17
Inlet Flow50 kg / hr
Environmental Heat Loss WorkN / A
Minimum Ambient Temperature For Cold Starting – 12
Minimum Inlet Pipe Diameter Allowed65 mm
LubricationSystemMaximum Lube Oil Flow for Engine Accessories7.6 litre / min
Normal Operating Oil Pressure Range-Low Idle Minimum Oil Pressure69 kPa
Normal Operating Oil Pressure Range-Maximum Oil Pressure at Rated Point426 kPa
Maximum Sump Oil Temperature121
Minimum Capacity Of Lubricating System (Oil Pan + Oil Filter)23.6 litre
By-Pass Valve Should Be FilteredYes
Sump Inclination Angle (Suitable For Intermittent Service)—The Front Of The Upward45 °
Sump Inclination Angle (Suitable For Intermittent Service)— The Front Of The Downward45 °
Sump Inclination Angle (Suitable For Intermittent Service)— Edge to Edge45 °
Cool Start SystemMinimum Battery Capacity(Below -18 )12 V 24 V
Minimum Battery Capacity(Below -18 )— Engine Cold Starting Current1250 CCA 625 CCA
Minimum Battery Capacity(Below -18 )—Engine Reserve Capacity360 * 180 min
Minimum Environmental Temperature When Cold Start Unassisted – 12
Minimum Engine Speed When Cold Start Unassisted125 RPM
Starting Torque At -12 N / A
Cooling SystemEngine Coolant Volume (Engine Only)11.4 litre
Minimum Pump Inlet Pressure (Without Pressure Cap, Thermostat Open)N / A
Maximum Static Height of Coolant Above Crankshaft Centerline of EngineN / A
Thermostat Standard Regulating Temperature (Range)82 – 95
Maximum Cylinder Block Coolant Pressure (Without Pressure Cover, Thermostat Closed)N / A
Minimum Pressure Cap50 kPa
Maximum Engine Coolant Temperature at Engine Outlet100
Minimum Engine Coolant Temperature71
Minimum Coolant Expansion Volume Relative To System Capacity6 %
Coolant Heat Loss WorkN / A
Engine Coolant Flow -4Psi(28 kPa) External Engine Cooling Cycle Resistance344 litre / min
Engine Coolant Flow -8Psi(55 kPa) External Engine Cooling Cycle Resistance314 litre / min
Maximum Engine External Cooling Cycle Resistance34 kPa
Sea Pump Flow208 litre / min
Maximum Degassing Time25 min
Minimum Coolant Water Loss Volume Relative To The Whole System Capacity0.11 %
Coolant Outlet Temperature When The Clutch Fan Is Running93

Scopes of Supply of DCEC 6CTAA8.3-M260 Marine Main Engine

Air Intake System1. Air Intake Manifold        Exhuast System1. Exhuast Manifold
2. Air Filter2. Turbocharger
3. N / A3. Exhuast Elbow
Starting System1. Starter Motor        Charging System1. Charging Alternator
2. Starter Rely2. N / A
Lubricating System1. Oil Pump        Fuel System1. Fuel Transfer Pump
2. Oil Filter2. High-Pressure Fuel Pump
3. N / A3. Machanical Governor
4. N / A4. Fuel Filter
Engine Shut-Down System1. Engine Fuel Shut-Off Solenoid        Power Output System1. Flywheel
2. N / A2. Standard Flywheel Housing

Optional Accessories of DCEC 6CTAA8.3-M260 Marine Main Engine

Air Intake System1. Air Intake Pre-Heater        Exhuast System1. Muffler & Bellows
2. Air Intake Pre-Filter2. Flame Trap
3. Air Filter Alarm System3. Spark Arrestor Type Muffler & Bellows
4. N / A4. DPF System
Fuel System1. Coarse FilterEngine Auiliary Accessories1. Hydraulic Oil Pump
2. Fuel Pre-Heater2. Hydraulic Cluch
Starting System1. Manual Magnetic DC ContactorCooling System1. Engine Monitor
2. Dual Ears Flywheel Housing2. Engine Protection System with Alarm System
3. Spring Starter Motor3. Machanical Engine Control Lever Syste
4. Air Starter Motor4. Electric Engine Control Lever System
5. Hydraulic Starter Motor5. N / A
6. Manual Magnetic DC Contactor6. N / A
Power Output System1. Gear Reduction GearboxCooling System1. Coolant Pre-Heater
2. Reverse Gear Box2. Jacket Water Heater
Lubricating System1. Oil Pre-HeaterEngine Mounting System1. Shock Absorber Pad
  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 DCEC 6CTAA8.3-M260 Marine Main Engine

Air Intake System1. Installation Position of Air FilterStarting System1. 12V Starter Motor for 12V 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. 12V Charging Alternator for 12V 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. 12V Solenoid for 12V 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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