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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.

M 20 C Marine Propulsion Engine

Developed and designed in response to special requirements of marine applications, the M 20 C is characterized by high reliability and economy. These features help to explain the continued high market demand for the M 20 C. The long-stroke design principle is the backbone of an excellent combustion process with low fuel and lubricating oil consumption, as well as low NOx emission. The M 20 C engine is SOLAS compliant. Its intelligent simplicity means high functional integration of fewer components. Fewer components mean greater reliability and easier maintenance. Overall, this leads to outstandingly low operating costs and rapid returns on investment. Reliability and ease of maintenance are convincing arguments in favor of the engines of this series.

  • Specification Summary

  • Power Range1020-1800 kW
  • Speed Range900-1000 rpm
  • EmissionsIMO II
  • AspirationTurbocharged
  • Bore200 mm
  • Specification Sheet


Product Details

Power Rating

Power Range 1020-1800 kW

Engine Specifications

Speed Range 900-1000 rpm
Emissions IMO II
Aspiration Turbocharged
Bore 200 mm
Stroke 300 mm
Displacement 9.4 L
Rotation (from flywheel end) Counterclockwise/Clockwise
Configuration Inline 6,8,9 Cylinder

Dimensions & Weights

Minimum Dry Weight 10.9 kg
Minimum Length 4049 mm
Maximum Length 5176 mm
Minimum Height 2344 mm
Maximum Height 2797 mm
Minimum Width 1591 mm
Maximum Width 1727 mm
  • Air Inlet System
    •  Air intake silencer / filter
  • Air intake silencer / filter
    • Control System
      •  Load Sharing Unit (for multiple engine plant only)
      •  Protection panel (emergency stop, override, reset push buttons)
      •  Protection System
      •  Serial Link Interface (MODbus RTU/canbus)
      •  Speed governor
      •  Start/Stop panel
    • Load Sharing Unit (for multiple engine plant only)
      • Protection panel (emergency stop, override, reset push buttons)
        • Protection System
          • Serial Link Interface (MODbus RTU/canbus)
            • Speed governor
              • Start/Stop panel
                • Cooling System
                  •  Charge air cooler
                  •  Electronic cooling water preheater
                  •  HT cooling water pump (engine driven)
                  •  LT cooling water pump (engine driven)
                • Charge air cooler
                  • Electronic cooling water preheater
                    • HT cooling water pump (engine driven)
                      • LT cooling water pump (engine driven)
                        • Exhaust System
                          •  Exhaust gas expansion joint
                          •  Exhaust gas insulated manifolds
                          •  Turbocharger at flywheel side
                        • Exhaust gas expansion joint
                          • Exhaust gas insulated manifolds
                            • Turbocharger at flywheel side
                              • Fuel System
                                •  Fuel circulating pump (attached / for MDO/MGO only)
                                •  Fuel indicator filter
                                •  Fuel pressure valve (separate / for MDO/MGO only)
                              • Instrumentation
                                •  Control push buttons and lamps
                                •  Emergency stop lever
                                •  Local Control Panel
                                •  Pressure and temperature indicator
                              • Control push buttons and lamps
                                • Emergency stop lever
                                  • Local Control Panel
                                    • Pressure and temperature indicator
                                      • Lube System
                                        •  Dry sump
                                        •  Lube oil cooler
                                        •  Lube oil pump (engine driven)
                                        •  Lube oil self-cleaning filter
                                        •  Pressure regulating valve
                                      • Mounting System
                                        •  High flexible coupling
                                        •  Rigid mounting
                                      • Starting System
                                        •  Air starting motor
                                        •  Manual barring device
                                      • General
                                        •  Lifting device (rental)
                                        •  Torsional Vibration Calculation (TVC)
                                      • Air Inlet System
                                        •  Air inlet shut-off valve
                                        •  Air intake transition piece
                                        •  Expansion joint
                                        •  Silencer / filter
                                      • Control System
                                        •  Electronic speed governor
                                        •  Engine alarm system
                                        •  Remote control system
                                        •  Remote indicators (start air pressure, engine speed, etc.)
                                        •  Starter for electroc driven pumps
                                        •  24 DC UPS
                                      • Electronic speed governor
                                        • Engine alarm system
                                          • Remote control system
                                            • Remote indicators (start air pressure, engine speed, etc.)
                                              • Starter for electroc driven pumps
                                                • 24 DC UPS
                                                  • Cooling System
                                                    •  FW/SW plate cooler
                                                    •  HT cooling water pump (electric driven)
                                                    •  LT cooling water pump (electric driven)
                                                    •  Sea water cooling pump (electric driven)
                                                    •  Steam / thermal oil cooling water preheater
                                                    •  Temperature control valve
                                                  • FW/SW plate cooler
                                                    • HT cooling water pump (electric driven)
                                                      • LT cooling water pump (electric driven)
                                                        • Sea water cooling pump (electric driven)
                                                          • Steam / thermal oil cooling water preheater
                                                            • Temperature control valve
                                                              • Exhaust System
                                                                •  Silencer (with or without spark arrester)
                                                                •  Turbocharger at counter-flywheel side
                                                              • Fuel System
                                                                •  Fuel oil cooler
                                                                •  HFO treatment and supply modules
                                                                •  HFO supply and booster pumps (electrical driven)
                                                                •  HFO self-cleaning automatic filter
                                                                •  HFO pressure regulating valve
                                                                •  HFO final preheater
                                                                •  HFO viscosity control device
                                                                •  Mixing tank
                                                              • Fuel oil cooler
                                                                • HFO treatment and supply modules
                                                                  • HFO supply and booster pumps (electrical driven)
                                                                    • HFO self-cleaning automatic filter
                                                                      • HFO pressure regulating valve
                                                                        • HFO final preheater
                                                                          • HFO viscosity control device
                                                                            • Mixing tank
                                                                              • Lube System
                                                                                •  Lube oil centrifuge
                                                                                •  Lube oil pump (electrical driven)
                                                                                •  Lube oil treatment and combined modules
                                                                                •  Pre-lubricating oil sump (electrical driven)
                                                                                •  Wet sump
                                                                              • Mounting System
                                                                                •  Flexible pipe connections
                                                                                •  Resilient mounting
                                                                              • Flexible pipe connections
                                                                                • Resilient mounting
                                                                                  • Starting System
                                                                                    •  Starting air receiver
                                                                                    •  Starting air compressor
                                                                                  • Starting air receiver
                                                                                    • Starting air compressor
                                                                                      • General
                                                                                        •  Cat Propulsion Systems
                                                                                        •  Engine PTO coupling
                                                                                        •  PTO alternator
                                                                                        •  PTO shaft on counter-flywheel side
                                                                                        •  Reduction gear
                                                                                        •  Reduction gear PTO coupling

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