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Commercial Propulsion Engines

Industry-leading technology allows Caterpillar to create the most reliable commercial engines for a variety of applications. From tugs and container vessels to yachts and sport fishers, Cat and MaK engines have demonstrated their efficiency countless times. With remarkable reliability and durability, these engines will exceed your expectations for decades.

3512C Propulsion Engine (IMO II)

The Cat 3512C marine propulsion engine makes your investment work harder. Through a wide range of available power ratings (including High Displacement ratings), no required aftertreatment technology, and nominal rated BSFC fuel consumption - it will drive down your total cost of ownership. With a redesigned piston bowl shape to improve combustion, and improved fuel delivery, this engine is IMO II emissions compliant and committed to sustainable environmental development. Single-source support, the Caterpillar warranty, and industry-leading one-year warranty on parts make the 3512C a fully integrated marine power solution.

  • Specification Summary

  • Power Range 1280-2551 bhp (955-1902 bkW)
  • Speed Range 1200 rpm, 1600 rpm, 1800 rpm
  • Configuration Vee 12, 4-Stroke-Cycle Diesel
  • Aspiration TTA

Product Details

Power Rating

Power Range 1280-2551 bhp (955-1902 bkW)

Engine Specifications

Speed Range 1200 rpm, 1600 rpm, 1800 rpm
Emissions IMO II, EU IW
Aspiration TTA
Bore 170.0 mm
Stroke 190.0 mm
Displacement 51.8 L
Rotation (from flywheel end) Counterclockwise or Clockwise
Configuration Vee 12, 4-Stroke-Cycle Diesel

Dimensions & Weights

Minimum Dry Weight 6532.0 kg
Minimum Length 2590.0 mm
Maximum Length 2669.0 mm
Minimum Height 1904.0 mm
Maximum Height 2242.0 mm
Minimum Width 2037.0 mm
Maximum Width 2232.0 mm
  • Air Inlet System
    •  Separate circuit aftercooler core, corrosion resistant coated (air side)
    •  Powercore air cleaner
  • Control System
    •  Dual Caterpillar A4 Electronic Engine Control with Electronic Unit Injector Fuel System
    •  Rigid Wiring Harness (10 amp DC power required to drive Electronic Engine Control Module)
  • Exhaust System
    •  3500C engines:
  • Fuel System
    •  Fuel transfer pump
    •  Electronically Controlled Unit Injectors
  • Fuel transfer pump
    • Electronically Controlled Unit Injectors
      • Instrumentation
        •  Electronic service meter, instrument panel (24V), start/stop switch, emergency stop button, maintenance due light, diagnostic light, warning light, maintenance clear switch, start motor magnetic switch, 15 and 3A breakers
      • Lube System
        •  Crankcase breather groups, Top mounted
        •  Oil filler and dipstick, LH or RH
        •  Oil pump, gear type
        •  250 or 1000 hour sump oil pan
      • Mounting System
        •  Rails, engine mounting, ledge type, 203 mm x 203 mm (8 in x 8 in) or Front Trunnion
      • Power Takeoffs
        •  Accessory drives: Lower RH, lower LH
        •  Front housing, two-sided
      • Accessory drives: Lower RH, lower LH
        • Front housing, two-sided
          • Protection System
            •  A4 Electronic Monitoring System provides customer programmable engine derating strategies to protect against adverse operating conditions
            •  Emergency stop push button (located in Electronic Instrument Panel)
            •  Safety shutoff protection:
          • General
            •  Vibration damper and guard
            •  Lifting eyes
            •  NOTE: Engines for heat exchanger cooling do NOT include heat exchange
          • Flywheel and Flywheel Housing
            •  Flywheel, SAE No. 00, 183 teeth
            •  Flywheel housing, SAE No. 00
          • Cooling System
            •  Oil cooler
            •  Thermostats and housing, Full open temperature 92 C (198 F)
            •  Jacket water pump, gear driven, centrifugal
            •  Auxiliary fresh water pump
            •  Aftercooler system: If using glycol, up to maximum 20% glycol concentration is allowed
          • Oil cooler
            • Thermostats and housing, Full open temperature 92 C (198 F)
              • Jacket water pump, gear driven, centrifugal
                • Auxiliary fresh water pump
                  • Aftercooler system: If using glycol, up to maximum 20% glycol concentration is allowed
                    • Instrumentation
                      •  Graphical Unit (Color Marine Power Display) for analog or digital of:
                    • Air Inlet System
                      •  Air Inlet Adapters
                    • Charging System
                      •  Battery Chargers
                      •  Charging Alternator
                    • Control System
                      •  Throttle Control
                    • Cooling System
                      •  Coolant Shunt Tank
                      •  Cooling System Options
                    • Exhaust System
                      •  Flexible Fittings
                      •  Elbows
                      •  Flanges
                      •  Flange and Exhaust Expanders
                      •  Mufflers
                    • Fuel System
                      •  Fuel Cooler Heat Exchanger - Sea Water
                      •  Primary Fuel Filter
                      •  Fuel Level Switch
                      •  Rigid Fuel Lines
                      •  Flexible Fuel Lines
                    • Instrumentation
                      •  Communication Modules
                      •  Color Marine Power Display System
                      •  Pilot House Instrument Panels
                      •  Marine Gear Sensors
                    • Communication Modules
                      • Color Marine Power Display System
                        • Pilot House Instrument Panels
                          • Marine Gear Sensors
                            • Lube System
                              •  Sump Pumps
                              •  Lubricating Oil
                            • Power Take-Offs
                              •  Stub Shafts
                              •  Crankshaft Pulleys
                              •  Damper Guard
                              •  Flexible Coupling and Guards
                            • Marine Society Requirements
                              •  Green Passport Documentation
                              •  Spray Shielding
                            • Protection System
                              •  Shutoff and Alarm Contactors
                            • Special Appearance Packages
                              •  Special Appearance Packages with Chrome Covers
                              •  Yacht Class Finish
                            • Starting System
                              •  Air Starting Motor Options
                              •  Battery Sets - 24 Volt - Dry
                              •  Battery Rack
                            • Mounting System
                              •  Engine Supports
                              •  Vibration Isolation Mountings
                            • Transitional Vibration Analysis
                              • Packing
                                •  Shrink Wrap Protection
                                •  Storage Preservation with Glycol Solution/Vapor Corrosion Inhibitor
                                •  Export Boxing
                                •  Export Packaging
                              • Parts Kits
                                Built for it