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Caterpillar C8.7 Marine Main Engine

The Caterpillar C8.7 marine main engine series is an I-6, 4-stroke cycle diesel engine, 117 mm (4.61 in) bore, 135.0 mm (5.31 in) stroke, 8.71 liters (531.5 in³) displacement. With common rail fuel system and electronic (A5E2 V2 ECM) governor.The Caterpillar C8.7 marine main engine series is rated at 2300 RPM and rated at 641 bhp (478 bkW).Caterpillar C8.7 marine main engine series complies with US EPA Tier 3/IMO II emission certification (commercial), X EU Stage IIIA emission standard, CCNR Stage II standard follows EU Stage IIIA standard, and the intake air is turbo-cooled.
Combustion air temperatures up to 45 °C (113 °F), seawater temperatures up to 32 °C (89.6 °F), and fuel temperatures up to 50 °C (122 °F) are measured at the turbocharger air compressor inlet.
As a partner of Caterpillar marine main engine for many years, EMAC is a professional power system solution provider. We provide global customers with one-stop power system sales solutions from system design to power system supply, from installation to commissioning, and from after-sales. program. With sales service support for spare parts supply, EMAC is your reliable powertrain partner for the most cost-effective and reliable system solutions.

Advantages of Caterpillar C8.7 Marine Main Engine

  • adapts to harsh working conditions, and has high-intensity and heavy-duty work capabilities.

  • The Holset wastegate valve makes the low speed performance more perfect and the power performance better.

  • Holset supercharger with integrated wastegate valve, low speed response and strong power.

  • Using forged steel camshaft and crankshaft, high-strength cylinder design, many parts are cast on the cylinder, with high rigidity, high pressure resistance, good reliability and longer service life.

  • The cylinder liner adopts a platform mesh honing design, which effectively prevents oil leakage with a perfect geometric structure, and adopts advanced technology such as new piston ring components and gasket crimping molding to reduce oil loss.

  • The cylinder block and cylinder head adopt integrated design to prevent the occurrence of engine water and oil leakage. The parts are 40% less than other similar engines, and the failure rate is greatly reduced.

Technical Specifications

Basic Introduction of Caterpillar C8.7 Marine Main Engine

Engine Model:C8.7
Engine Type:I-6, 4-Stroke-Cycle-Diesel
Displacement:8.71 L
Rated Power / Speed:478 HP @ 2300 RPM
Aspiration Method:Turbocharged-Aftercooled
Emission Standard:IMO II
Bore*Storke:117 mm (4.61 in)*135 mm (5.31 in)
Packing Size(L*W*H):1200 mm * 887 mm * 983 mm
Weight , Net Dry:1071 kg (2361 lb)
Lead Time:15-30 Working Days
Payment Terms:T/T ,L/C

Engine Model

Rated Speed


Fuel system type

C8.7478 HP @ 2300 RPMTurbocharged-AftercooledCommon Rail

General Engine Specifications of CAT C8.7 Marine Main Engine

Basic Engine SpecificationsI-6, 4-Stroke-Cycle-DieselGovernorECU
Displacement8.71 L (531.5 in³)Fuel System TypeCommon Rail
Rated Engine Speed2300 RPMLength1200 mm (47.2 in)
High Idle Speed2530 RPMWidth887 mm (34.9 in)
Low Idle Speed (Programmable)600 RPMHeight983 mm (38.7 in)
AspirationSupercharged-Turbocharged-AftercooledWeight, Net Dry (Approx)1071 kg (2361 lb)
Bore117 mm (4.61 in)Rotation (From Flywheel End)Counterclockwise
Stroke135 mm (5.31 in)Flywheel Housing/FlywheelSAE No. 01M
Peak Torque2332 N.m @ 1700 RPMFlywheel Teeth149

Tolerances of CAT C8.7 Marine Main Engine

Power+/- 3 %Exhaust Flow+/- 6 %
Exhaust Stack Temperature+/- 8 %Specific Fuel Consumption+/- 3 %
Inlet Air Flow+/- 5 %Heat Rejection+/- 5 %
Intake Manifold Pressure+/- 10 %Fuel Rate+/- 5 %

Emission Compliance of CAT C8.7 Marine Main Engine

RecreationalEPA Tier 3 (E5 Cycle – Recreational Only)CommercialEU Stage IIIA
Recreational Craft Directive (EU) RCDCCNR Stage II Through Reciprocity with EU Stage IIIA

System of CAT C8.7 Marine Main Engine

Air SystemCombustion Air Inlet System
Intake Combustion Air Flow29.8 m³/min (1052.4 cfm)
Intake Combustion Air Temperature Up to45 °C (113 °F)
Max. Allowable Intake Air Restriction5.0 kPa (20 in H2O)
Engine Room Ventilation Air
Heat Rejection to Atmosphere20.2 kW (1149 BTU/min) @ 25°C (77°F) Ambient Temperature
Fuel SystemFuel Flow Supply Line (Max)220 L/hr (58.1 gal/hr)
Fuel Flow Return Line (Max)125 L/hr (33.0 gal/hr)
Fuel Rate at Rated Speed123.8 L/hr (32.7 gal/hr)
Total Fuel Supply Restriction (Max)30 kPa (8.9 in Hg) (4.4 PSI)
Fuel Restriction Across Priming Pump and Clean Filter15 kPa (4.4 in Hg) (2.2 PSI)
Allowable Fuel Restriction of OEM Supplied Components15 kPa (4.4 in Hg) (2.2 PSI)
Fuel Temperature Engine Inlet (Max)50 °C (122 °F)
Fuel Return Line Restriction (Max)20 kPa (5.9 in Hg) (2.9 PSI)
Fuel Supply/Return Connection3/4-16 SAE J514 (-8), 37 ° FLARE
Minimum Fuel Supply Line Inside DiameterSAE -10 (15.9 mm) (5/8 in)
Electric Fuel Priming Pump Inlet/Outlet Connection7/8-14 SAE J1926-1 (No. 10) STOR
Diesel Fuel GradeUS Diesel #2 / EN590 / Biodiesel 7 % Max.
Exhaust SystemExhaust Gas Flow (Total)2048.3 kg/hr (4515.7 lb/hr)
Exhaust Stack Temperature504 °C (939 °F)
Engine Exhaust Connection V-Band Clamp150 mm (5.91 in)
Max. Allowable System Backpressure10 kPa (40.1 in H2O)
Max. Allowable Static Weight on Turbine Outlet0 kg (0 lb)
Max. Allowable Static Bending Moment on Turbine Outlet0 Nm (0 ft-lbs)
Lube SystemSump TypeCenter Sump
Sump Capacity34 L (9.0 gal)
Oil Change Interval250 hr
Max. Installation Angle (Fore-Aft)10 degrees
Max. Operating Angle (Fore-Aft)20 degrees
Max. Operating Angle (Athwart Ship)22.5 degrees
Quality Diesel Engine Oil (Min)CI-4 10W30 or 15W40
Starting SystemElectrical Starting System (24V)
Electrical Starting Motor24 VDC
Cold Starting670 CCA [at 0 °C (32 °F) Ambient Temperature]
Recommended Battery Capacity2 x 88 Ah, Series
Electrical Starting System (12V)
Electrical Starting Motor12 VDC
Cold Starting670 CCA [at 0 °C (32 °F) Ambient Temperature]
Recommended Battery Capacity2 x 88 Ah, Parallel

Cooling System of CAT C8.7 Marine Main Engine

Jacket Water Cooling SystemCooling Water Refill Capacity41 L (10.8 gal)
Coolant MediumCat Extended Life Coolant (ELC) or Equal
Expansion Tank Pressure Cap100 kPa (14.5 PSI)
Raw Water Cooling System (SWAC)Heat Rejection to Raw Water Cooling System197kW (209bkW)
Flow Raw Water Pump 442-7488 – Max180L/Min (209bkW)
Flow Raw Water Pump 442-7488 – Min39.6 gal/min (280HP)
Raw Water Pump Maximum Inlet Restriction2.0 m (6.6 ft) H2O
Raw Water Temperature Engine Out to Gear Oil Cooler (Max)42.6°C (209bkW)
Raw Water Temperature From Gear Oil Cooler 448-9439 If Equipped (Max)108.7°F (280HP)
Gear Oil Cooler 448-9439 Heat Rejection Capability11.2 kW (636.9 BTU/min)
Raw Water Connection Engine Inlet50.8 mm (2.00 inch) SAE J1231 Hose Connection
Raw Water Connection Engine Outlet45 mm (1.77 inch) SAE J1231 Hose Connection
Sea Water Strainer Mesh Hole Diameter (Max)1.6 mm (0.063 in)

Standard of CAT C8.7 Marine Main Engine

Air intake system1. Electronically Controlled Belt-Driven SuperchargerFuel System1. High Pressure Common Rail Fuel System
2. Air Filter/Fume Treatment Unit (Closed System)2. High Pressure Fuel System with Integral Low Pressure Fuel Transfer Pump
3. Water Jacket Water-Cooled Turbocharger3. Remote Mounted Primary Fuel Filter with Integrated Electric Priming Pump
4. Aftercooler Condensate Drain4. Rear Mounted Secondary Fuel Filter for Left and Right Service
Control System1. Cold Mode Start Strategycooling system1. Gear Driven Bronze Impeller Seawater Pump for Hex Cooled Engines Only
2. Pwm Auxiliary Throttle2. Sea Water After Cooling
3. Cold Mode Start Strategy3. Belt Driven Jacket Pump
4. Electronic Diagnostics and Troubleshooting4. Jw Heat Exchanger – Corrosion Resistant Shell and Tube
5. Engine and Transmission Monitoring (Temperature, Pressure)5. Fuel Cooler
6. Electronic Air-Fuel Ratio Control6. Expansion Tank
7. Engine Protection Mode for Extended Ambient Conditions7. Thermostat Housing (95 C Wide Open)
8. Three Types of Throttle Inputs (Can, Pwm and 0-5V)8. 63 Mm Hose Connector Raw Water Pump Inlet
9. 70-Pin Customer Connector9. 50 Mm Hose Connector Raw Water Pump Outlet
exhaust system1. Water-Cooled Exhaust Manifold and Turbochargerinstall the system1. Electronic Engine Monitoring System Provides Engine Power Derating Strategy for Protection In Harsh Operating Conditions
2. 90 Mm Id Round Flange Exhaust Port2. N/A
Lubrication system1. Crankcase Breathing Hole, Closed Crankcase Ventilationconventional1. Front Belt and Shock Absorber Guards
2. Rear Mounted Cartridge Oil Filter for Left and Right Side Service2. Hanging Lugs
3. Oil Cooler3. Right or Left Service Option
4. Center Sump Pan4. Top Front-to-Customer Wiring Connector and Service Tool Connector
5. Gear Driven Oil Pump5. N/A
6. Oil Dipstick, Right Service on Port, Left Service on Starboard6. N/A

Optional Accessories of CAT C8.7 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 ContactorControl System1. Control System
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

Modifiable of CAT C8.7 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
Cooling System1. Can Modify Engine Into Keel Cooling SystemEngine Auiliary Accessories1. Additional Auxiliary Systems Can Be Added for Special Applications
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 BracketFuel System1. Upgrade to Fuel Fitler That Integrated with Fuel Transfer Pump and Fuel Pre-Hearter

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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