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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 43 C Marine Propulsion Engine

Since its introduction into the market, the MaK long-stroke engine series M 43 has achieved an outstanding position on the marine applications market as an in-line engine in 6, 7, 8 and 9 cylinder versions. More than 650 engines with a total power of more than 6,500 MW have already been sold making the M 43 the market leader in the 5–9 MW power class. All the cylinder configurations have contributed to this market success. More than 90% of the marine engines run on heavy fuel within IMO regulatory limits.

  • Specification Summary

  • Power Range6000 - 9450 kW
  • Speed Range500-514 rpm
  • EmissionsIMO II
  • AspirationTurbocharged
  • Bore430 mm
  • Specification Sheet


Product Details

Power Rating

Power Range 6000 - 9450 kW

Engine Specifications

Speed Range 500-514 rpm
Emissions IMO II
Aspiration Turbocharged
Bore 430 mm
Stroke 610 mm
Displacement 88.6 L
Rotation (from flywheel end) Counterclockwise / Clockwise
Configuration 6,7,8,9 Cylinder

Dimensions & Weights

Minimum Dry Weight 91.0 kg
Minimum Length 8271 mm
Maximum Length 10528 mm
Minimum Height 5130 mm
Maximum Height 5501 mm
Minimum Width 2878 mm
Maximum Width 2878 mm
  • Air Inlet System
    •  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 / canbus)
    •  Speed governor
    •  Start / stop panel
  • Cooling System
    •  Electronic cooling water preheater
    •  HT cooling water pump (engine driven)
    •  2-stage charge air cooler
  • Exhaust System
    •  Exhaust gas expansion joint
    •  Exhaust gas insulated manifolds
    •  Turbocharger at flywheel end
  • Exhaust gas expansion joint
    • Exhaust gas insulated manifolds
      • Turbocharger at flywheel end
        • Fuel System
          •  Fuel circulating pump (electric driven / for MGO/MDO only)
          •  Fuel indicator filter
          •  Fuel pressure valve (separate / for MGO/MDO 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 duplex filter
                  •  Lube oil plate cooler (separate)
                  •  Lube oil pump (engine driven)
                  •  Lube oil self-cleaning filter
                  •  Pressure regulating valve
                • Dry sump
                  • Lube oil duplex filter
                    • Lube oil plate cooler (separate)
                      • Lube oil pump (engine driven)
                        • Lube oil self-cleaning filter
                          • Pressure regulating valve
                            • Mounting System
                              •  High flexible coupling
                              •  Rigid mounting
                            • High flexible coupling
                              • Rigid mounting
                                • Starting System
                                  •  Electrical barring device
                                  •  Starting air valve
                                • General
                                  •  Lifting device (rental)
                                  •  Torsional Vibration Calculation (TVC)
                                • Lifting device (rental)
                                  • Torsional Vibration Calculation (TVC)
                                    • Air Inlet System
                                      •  Air inlet shut-off valve
                                      •  Air intake transition piece
                                      •  Expansion joint
                                      •  Silencer / filter
                                    • Air inlet shut-off valve
                                      • Air intake transition piece
                                        • Expansion joint
                                          • Silencer / filter
                                            • Control System
                                              •  Electronic speed governor cabinet
                                              •  Engine alarm system
                                              •  Remote control system
                                              •  Remote indicators (start air pressure, engine speed, etc.)
                                              •  Starter for electric 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
                                            • Exhaust System
                                              •  Silencer (with or without spark arrestor)
                                              •  Turbocharger at counter-flywheel side
                                            • Silencer (with or without spark arrestor)
                                              • Turbocharger at counter-flywheel side
                                                • Fuel System
                                                  •  Fuel oil cooler
                                                  •  HFO final preheater
                                                  •  HFO pressure regulating valve
                                                  •  HFO self-cleaning automatic filter
                                                  •  HFO supply and booster pumps (electrical driven)
                                                  •  HFO treatment and supply modules
                                                  •  HFO viscosity control device
                                                  •  Mixing tank
                                                • Lube System
                                                  •  Lube oil pump (electrical driven)
                                                  •  Lube oil treatment and combined modules
                                                  •  Pre-lubricating oil pump (electrical driven)
                                                  •  Temperature control valve
                                                • Lube oil pump (electrical driven)
                                                  • Lube oil treatment and combined modules
                                                    • Pre-lubricating oil pump (electrical driven)
                                                      • Temperature control valve
                                                        • Mounting System
                                                          •  Flexible pipe connections
                                                          •  Resilient mounting
                                                        • Flexible pipe connections
                                                          • Resilient mounting
                                                            • Starting System
                                                              •  Starting air compressor
                                                              •  Starting air receiver
                                                            • Starting air compressor
                                                              • Starting air receiver
                                                                • 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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