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6LTAA8.9-M315 Marine Engine

DCEC 6LTAA8.9-M315 marine main engine is a 6-cylinders in line, 8.9 liters four-strokes engine with 114mm bore and 145mm stroke.

Equipped with BOSCH P7100 fuel pump and RQV-K governor, engine comes with turbocharger and Air- Air Intercooler.

The prime power at 2134RPM of DCEC 6LTAA8.9-M315 marine main engine is 315HP.

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 6LTAA8.9-M315 Marine Engine

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

  • The integrated oil and water pipeline replaces the traditional hose, eliminating the hidden danger of leakage; the enhanced cooling and lubrication function effectively prolongs the service life of the engine.

  • The high-pressure common rail fuel system (HPCR) is adopted to ensure rapid throttle response at different speeds, better power and fuel economy, and lower noise.

  • Adopting exhaust gas bypass turbocharger, the supercharging is smoother at low speed, and the power output is more stable at high speed.

  • The engine back-end power output device (REPTO) can be used to enhance the control ability of remote equipment.

Technical Specifications

Engine Model:6LTAA8.9-M315
Engine Type:6 Cylinders
Displacement:8.9 L
Rated Speed:1500 RPM
Rated Power / Speed:315 HP @ 2134 RPM
Peak Torque:1350 N.m @ 1400 RPM
Aspiration Method:Turbocharged & Air-Air Intercooler
Emission Standard:N / A
Bore*Storke:114 mm * 145 mm
Packing Size(L*W*H):1494 mm * 796 mm * 1228 mm
Wet Weight:650 kg
Lead Time:15-30 Working Days
Payment Terms:T/T ,L/C

Coming Soon

Engine Model

Rated Power

Max. Torque

Fuel System


6LTAA8.9-M300300 BHP @ 1800 RPM1295 N.m @ 1800 RPMWeifu PW2000 Pump / RQV_K Mechanical GovernorTurbocharged & Air-Air Intercooler
6LTAA8.9-M315315 BHP @ 2134 RPM1350 N.m @ 1400 RPMPausch P7100 Pump / RQV-K Mechanical GovernorTurbocharged & Air-Air Intercooler

General Infomation of DCEC 6LTAA8.9-M315 Marine Main Engine

Engine Model6LTAA8.9 – M315Displacement8.9 L
Bore * Stroke114 mm * 145 mmAspirationTurbocharged & Air-Air Intercooler
Cylinders6 Cylinders, in LineFuel SystemPausch P7100 Pump / RQV – K Governor
Compression Ratio16.6 : 1Rated Power315 BHP @ 2134 RPM
Maximum Power344 BHP @ 2200 RPMMaximum Torque1350 N.m @ 1400 RPM
Dry Weight650 kgLow Idle Speed600 – 800 RPM
Instantaneous Inertia of Rotating Parts (With Flywheel)0.72 kg.m²C.G. from Rear End Face of Cylinder Block427 mm
C.G. from Center Line of Crankshaft163 mmHigh Idle Speed2430 RPM
Piston Speed10.3 m / secThe Ignition Sequence1 – 5 – 3 – 6 – 2 – 4

Installation Data of DCEC 6CTAA8.9-M315Marine 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 Boss250 N.m
Finished Engine Instantaneous Inertia – Turning Shaft29.8 kg.m²
Finished Engine Instantaneous Inertia – Pitch Axis76.8 kg.m²
Finished Engine Instantaneous Inertia – Partial Rotation66.9 kg.m²

Fuel System of DCEC 6CTAA8.9-M315 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 6LTAA8.9-M315 Marine Main Engine

System Technical Data of DCEC 6LTAA8.9-M315 Marine Main Engine

Exhaust SystemMaximum Exhaust Back Pressure10.1 kPa
Exhaust Flow RateN / A
Exhaust Temperature480 ℃
Exhaust Heat Loss WorkN / A
Recommended Exhaust Pipe Diameter100 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 FlowN / A
Environmental Heat Loss WorkN / A
Minimum Ambient Temperature For Cold Starting – 12
Minimum Inlet Pipe Diameter Allowed125 mm
Pressurized Intercooling SystemMaximum Allowable Inlet Manifold Temperature (Ambient Temperature 25 ℃)3.7 kPa
Maximum Allowable Pressure Difference Before And After Intercooling6.2 kPa
Maximum Allowable Inlet Manifold Temperature Difference With Ambient Temperature53 g / litre / sec
Lubrication SystemMaximum 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 Temperature138 ℃
Minimum Capacity Of Lubricating System (Oil Pan + Oil Filter)27.6 litre
By-Pass Valve Should Be FilteredYes
Sump Inclination Angle (Suitable For Intermittent Service)— The Front Of The Upward30 °
Sump Inclination Angle (Suitable For Intermittent Service)— The Front Of The Downward30 °
Sump Inclination Angle (Suitable For Intermittent Service)— Edge to Edge30 °
Cool Start SystemMinimum Battery Capacity(Below -18 ℃)12 V 24 V
Minimum Battery Capacity(Below -18 ℃)— Engine Cold Starting Current1500 CCA 750 CCA
Minimum Battery Capacity(Below -18 ℃)—Engine Reserve Capacity360 * 180 min
Maximum Voltage Drop Of Starting LoopN / A
Minimum Environmental Temperature When Cold Start Unassisted-12 ℃
Minimum Engine Speed When Cold Start Unassisted120 RPM
Starting Torque At -12 ℃N / A
Cooling SystemEngine Coolant Volume (Engine Only)11.1 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 – 93 ℃
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 Temperature70 ℃
Minimum Coolant Expansion Volume Relative To System Capacity6 %
Coolant Heat Loss WorkN / A
Engine Coolant Flow 2.5Psi(17 kPa) External Engine Cooling Cycle Resistance318 litre / min
Engine Coolant Flow 5Psi(34 kPa) External Engine Cooling Cycle Resistance303 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 6LTAA8.9-M315 Marine Main Engine

Air Intake System1. Air Intake ManifoldExhuast System1. Exhuast Manifold
2. Air Filter2. Turbocharger
3. N / A3. Exhuast Elbow
Starting System1. Starter MotorCharging System1. Charging Alternator
2. Starter Rely2. N / A
Lubricating System1. Oil PumpFuel 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 SolenoidPower Output System1. Flywheel
2. N / A2. Standard Flywheel Housing

Optional Accessories of DCEC DCEC 6LTAA8.9-M315 Marine Main Engine

Air Intake System1. Air Intake Pre-HeaterExhuast 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 6LTAA8.9-M315 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.

The picture of Sale Manual showing the accessories and scopes of supply.

Engine Sale Manual

The picture of Installation Drawing showing the accessories and scopes of supply.

Installation Drawing

The picture of Installation Manual showing the accessories and scopes of supply.

Installation Manual

The picture of Operation Manual showing the accessories and scopes of supply.

Operation Manual

The picture of Engine Parts Catalogue showing the accessories and scopes of supply.

Parts Catalogue

The picture of Test Report and Certifcate showing the accessories and scopes of supply.

Report & Certifcate

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