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Caterpillar C7.1-ME350 Marine Main Engine

The Caterpillar C7.1-ME350 marine main engine is an I-6, 4-Stroke-Cycle-Diesel engine with a 105.0 mm (4.13 in) bore, 135.0 mm (5.31 in) stroke and 7.01 L (428 in³) displacement. Lube oil system with replaceable oil filter: 20 L (5.3 gal) with common rail fuel system, heat exchanger or keel cooling and electronic (A5E2 V2 ECM) governor.The Caterpillar C7.1-ME350 marine main engine is rated at 2300 RPM and rated at 350 bhp (261 bkW).

Caterpillar C7.1-ME350 marine main engine complies with US EPA Tier 3/IMO II emission certifiCaterpillarion (commercial), RCD 2016, EU Stage IIIA emission standard, CCNR Stage II standard by following EU Stage IIIA standard, air intake is turbocharged After cooling.

As part of EMAC, Caterpillar Marine also offers high performance propulsion and handling solutions. Engine, engine provides electronic control and mechanical, fuel common rail system for customers to choose, we provide full life cycle service for all customers, from design to ship power system supply, from installation to commissioning, from after-sales service training to spare parts supply, from Troubleshooting to Overhaul Technical Support.

Advantages of Cat C7.1-ME350 Marine Main Engine

  • It is synchronized with Cummins’ advanced design and sophistiCaterpillared manufacturing, 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 C7.1-ME350 Marine Main Engine

Engine Model:C7.1-ME350
Engine Type:I-6, 4-Stroke-Cycle-Diesel
Displacement:7.01 L
Rated Speed:2300 RPM
Aspiration Method:Turbocharged-Aftercooled
Emission Standard:IMO II
Bore*Storke:105 mm (4.13 in)*135 mm (5.31 in)
Packing Size(L*W*H):1095 mm * 798 mm * 876 mm
Weight , Net Dry:760 kg (1676 lb)
Lead Time:15-30 Working Days
Payment Terms:T/T ,L/C

Engine Model

Rated Speed

Aspiration

Fuel system type

C7.1-ME280209 bkW (280 BHP) @ 2300 RPMTurbocharged-AftercooledCommon Rail
C7.1-ME350261 bkW (350 BHP) @ 2500 RPMTurbocharged-AftercooledCommon Rail
C7.1-ME400298 bkW (400 BHP) @ 2600 RPMTurbocharged-AftercooledCommon Rail
C7.1-ME425317 bkW (425 BHP) @ 2700 RPMTurbocharged-AftercooledCommon Rail
——END——

General Engine Specifications of CAT C7.1-ME350 Marine Main Engine

Basic Engine SpecificationsI-6, 4-Stroke-Cycle-DieselGovernorECU
Displacement7.01 L (428 in³)Fuel System TypeCommon Rail
Rated Engine Speed2500 RPMLength1095 mm (43.1 in)
Target Speed at Sea TrialRated Speed +/- 2% RPMWidth798 mm (31.4 in)
High Idle SpeedRated Speed +10% RPMHeight876 mm (34.5 in)
Low Idle Speed (Programmable)600-800 RPMWeight, Net Dry (Approx)760 kg (1676 lb)
AspirationTurbocharged-AftercooledRotation (From Flywheel End)Counterclockwise
Bore105 mm (4.13 in)Flywheel HousingSAE No. 03
Stroke135 mm (5.31 in)FlywheelSAE 11.5” with 126 Teeth
Peak Torque1231 Nm @ 1800 RPM (261 bkW)908 ft-lb @ 1800 RPM (350 HP)

Tolerances of CAT C7.1-ME350 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 C7.1-ME350 Marine Main Engine

RecreationalEPA Tier 3 (E3 Cycle)CommercialEPA Tier 3 (E3 Cycle)
IMO II (EPA, GL, CCS)IMO II (EPA, GL, CCS)
Recreational Craft Directive (EU) RCD 2016
——END——

System of Cat C7.1-ME350 Marine Main Engine

Air SystemCombustion Air Inlet System
Intake Combustion Air Flow23.2 m³/min (261 bkW)
Intake Combustion Air Flow817.7 cfm (350 HP)
Intake Combustion Air Temperature Up to50 °C (122 °F)
Max. Allowable Intake Air Restriction6.5 kPa (26 in H2O)
Engine Room Ventilation Air
Heat Rejection to atmosphere9.3 kW (261 bkW) @ 25 °C Ambient Temperature
Heat Rejection to atmosphere528 BTU/min (350 HP) @ 77 °F Ambient Temperature
Fuel SystemFuel Flow Supply Line (Max)270 L/hr (71.3 gal/hr)
Fuel Flow Return Line (Max)270 L/hr (71.3 gal/hr)
Fuel Rate at Rated Speed69.2 L/hr (261 bkW)
Fuel Rate at Rated Speed18.3 gal/hr (350 HP)
Total Fuel Supply Restriction (Max)30 kPa (8.9 in Hg) (4.4 PSI)
Fuel Restriction Across Primary Fuel Filter (Clean)3.5 kPa (1.0 in Hg) (0.5 PSI)
Fuel Temperature Engine Inlet (Max)60 °C (140 °F)
Fuel Return Line Restriction (Max)37 kPa (10.9 in Hg) (5.4 PSI)
Fuel Supply/Return Connection3/4″-16 SAE J514 (-8), 37° FLARE   13/16”-16 STOR (Optional)
Minimum Fuel Supply Line Inside DiameterSAE -8 (12.7 mm) (1/2 in)
Primary Fuel Filter Inlet/Outlet Connection3/4″-16 SAE J514 (-8), 37 °F LARE
Diesel Fuel GradeUS Diesel #2 / EN590 / Biodiesel 20 % Max
Exhaust SystemExhaust Gas Flow (Total)1658 kg/hr (261 bkW)
Exhaust Gas Flow (Total)3655 lb/hr (350 HP)
Exhaust Stack Temperature380 °C (261 bkW)
Exhaust Stack Temperature716 °F (350 HP)
Max. Allowable System Backpressure15 kPa (60.2 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 Capacity20 L (5.3 gal)
Oil Change Interval500 hr
Max. Installation Angle (Fore-Aft)10 degrees
Max. Operating Angle (Fore-Aft)20 degrees
Max. Operating Angle (athwart Ship)30 degrees
Quality Diesel Engine Oil (Min)CI-4 10W30 or 15W40
Starting SystemElectrical Starting Motor24 VDC, 12 VDC
Cold Starting520 CCA (24 VDC), 520 CCA (12 VDC)  [at -5 °C (23 °F) Ambient Temperature]
Recommended Battery Capacity2×100 Ah, Series (24 VDC), 2×100 Ah, Parallel (12 VDC)
——END——

Cooling System of CAT C7.1-ME350 Marine Main Engine

HTC Cooling Water System

(Engine Jacket Water)

Heat Rejection to HTC Cooling Water System189 kW (261 bkW)
Heat Rejection to HTC Cooling Water System10754 BTU/min (350 HP)
Flow HTC Cooling Water Pump (Nominal)430 L/min (261 bkW)
Flow HTC Cooling Water Pump (Nominal)94.6 gal/min (350 HP)
HTC Cooling Water Temperature Engine Out (Max)92 °C (203 °F)
HTC Cooling Water Refill Capacity (Keel Cooled Only)38 L (10 gal)
Coolant MediumCat Extended Life Coolant (ELC) or Equal. 50% Glycol
Expansion Tank Pressure Cap50 kPa (7.25 PSI)
HTC Cooling Water Connection Engine Inlet57 mm (2.25 in) OD
HTC Cooling Water Connection Engine Outlet57 mm (2.25 in) OD
LTC Cooling Water System (Aftercooler)Heat Rejection to HTC Cooling Water System50.0 kW (261 bkW)
Heat Rejection to HTC Cooling Water System2846 BTU/min (350 HP)
Flow HTC Cooling Water Pump (Nominal)195 L/min (261 bkW)
Flow HTC Cooling Water Pump (Nominal)42.9 gal/min (350 HP)
Ltc Water Temperature Engine In (27°C Sea)46 °C (261 bkW)
Ltc Water Temperature Engine In (81°F Sea)115 °C (350 HP)
Ltc Cooling Water Refill Capacity5 L (1.3 gal) Engine Only
Coolant MediumCat Extended Life Coolant (ELC) or Equal. 50% Glycol.
Expansion Tank Pressure Cap50 kPa (7.25 PSI)
Ltc Cooling Water Connection Engine Inlet (138)45 mm (1.75 in) OD
Ltc Cooling Water Connection Engine Outlet (139)45 mm (1.75 in) OD
Raw Water Cooling System (SWAC)Cooling Water Refill Capacity43 L (11.4 gal)
Coolant MediumCat Extended Life Coolant (ELC) or Equal. 50% Glycol
Expansion Tank Pressure Cap100 kPa (14.5 PSI)
Heat Rejection to Raw Water Cooling System239 kW (261 bkW)
Heat Rejection to Raw Water Cooling System13542 BTU/min (350 HP)
Flow Raw Water Pump (Nominal)195 L/min (261 bkW)
Flow Raw Water Pump (Nominal)42.9 gal/min (350 HP)
Raw Water Pump Maximum Inlet Restriction2.0 m (6.6 ft) H2O
Raw Water Temperature Engine Out to Gear Oil Cooler (27°C Sea)44.6 °C (261 bkW)
Raw Water Temperature Engine Out to Gear Oil Cooler (81°F Sea)112.3 °F (350 HP)
Gear Oil Cooler 473-0282 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)
——END——

Standard of CAT C7.1-ME350 Marine Main Engine

Cooling System1. Gear Driven Jacket PumpFuel System1. Common Rail Fuel System
2. Corrosion-Resistant Seawater Aftercooler2. Electric Fuel Priming Pump
3. Fuel Cooler
Universal1. Shock Absorbers and GuardsLubrication System1. Closed Crankcase Ventilation System
2. Self-Tensioning Multi-V-Belt Drive2. Integrated Engine Oil Cooler
Install the System1. Front and Rear Engine Mounting BracketsStarting System1. 12 V or 24 V Starter Motor
Exhaust System1. Water-Cooled Turbocharger and Exhaust Manifold
——END——

 

Optional of CAT C7.1-ME350 Marine Main Engine

Air Intake System1. Various 6″ Water Cooled Exhaust Elbow ConfigurationsFuel System1. SOLAS Double Wall High Pressure Fuel Line Kit
Lubrication System1. Left and Right Oil DipsticksStarting System1. Auxiliary Alternator Mounted on Engine – 24V 100A or 12V 175A
2. Transmission Gear Oil Cooler (Installed Engine)2. Glow Plug
Cooling System1. Engine Mounted Bilge Pump and Auxiliary Water Pump with Electromagnetic ClutchProtection System1. Additional Engine Transmission Sensor Kits for Monitoring onboard or Offboard
2. Tube Bundle Type Jacket Water Heat Exchanger and Gear Driven Sea Water Pump (Rubber Impeller)2. N/A
3. Jacket Water Heater3. N/A
4. Cab Heater (Heater) Connection4. N/A
——END——

Modifiable of CAT C7.1-ME350 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
——END——

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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