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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.

VM 46 DF Marine Propulsion Engine

Based on the successful M 43 C MaK medium speed engine, the M 46 DF was designed by Caterpillar Motoren, Kiel to meet and exceed the reliability and lifetime expectations of the M 43 C while maintaining its class leading position regarding operational efficiency. With its clean design, the M 46 DF does allow fast and easy access to the system and components supporting the operation, service and maintenance simplicity MaK products are known for. Designed to operate on gaseous- as well as liquid (MDO HFO) fuels, the M 46 DF will meet IMO III emission limits while operating in gas mode and injecting a small amount of ignition fuel to control combustion. Attention was paid to the customers´ demand for a safe and reliable operation at varying engine loads and gas qualities.

  • Specification Summary

  • Power Range10800 - 15440 kW
  • Speed Range500 / 514 rpm
  • EmissionsIMO II in diesel mode / IMO III in gas mode
  • AspirationTurbocharged
  • Bore460 mm
  • Specification Sheet


Product Details

Power Rating

Power Range 10800 - 15440 kW

Engine Specifications

Speed Range 500 / 514 rpm
Emissions IMO II in diesel mode / IMO III in gas mode
Aspiration Turbocharged
Bore 460 mm
Stroke 610 mm
Rotation (from flywheel end) Counterclockwise / Clockwise
Configuration 12,16 Cylinder

Dimensions & Weights

Minimum Dry Weight 160.0 kg
Minimum Length 9847 mm
Maximum Length 11943 mm
Minimum Height 5098 mm
Maximum Height 5122 mm
Minimum Width 3890 mm
Maximum Width 4027 mm
  • Air Inlet System
    •  Air intake silencer / filter
  • Control System
    •  Load sharing unit
    •  Modular Alarm Control Protection System (MACS)
    •  Speed governor
  • Cooling System
    •  Electric cooling water preheater
    •  HT cooling water pump (engine driven)
    •  2-stage charge air cooler
  • Electric 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 / counter-flywheel end
        • Fuel System
          •  Fuel circulating pump (electric driven / for MDO/MGO only)
          •  Fuel indicator filter
          •  Fuel pressure valve (separate / for MDO/MGO only)
        • Fuel circulating pump (electric driven / for MDO/MGO only)
          • Fuel indicator filter
            • Fuel pressure valve (separate / for MDO/MGO only)
              • Gas System
                •  Gas valve unit
              • Instrumentation
                •  Control push buttons and lamps
                •  Emergency stop lever
                •  Local control panel
                •  Pressure and temperature indicator
              • Lube System
                •  Dry sump
                •  Lube oil plate cooler (separate)
                •  Lube oil pump (engine driven)
                •  Lube oil safety filter
                •  Lube oil self-cleaning filter
                •  Pressure regulating valve
              • Mounting System
                •  High flexible coupling
                •  Rigid mounting
              • Starting System
                •  Electrical barring device
                •  Starting air valve
              • General
                •  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
                        •  Engine alarm system
                        •  Remote control system
                        •  Remote indicators (start air pressure, engine speed, etc.)
                        •  Starter for electric driven pumps
                        •  24 DC UPS
                      • Engine alarm system
                        • Remote control system
                          • Remote indicators (start air pressure, engine speed, etc.)
                            • Starter for electric driven pumps
                              • 24 DC UPS
                                • Cooling System
                                  •  Cooling water preheater steam / thermal oil / electrical
                                  •  FW/SW plate cooler
                                  •  HT cooling water pump (electric driven)
                                  •  LT cooling water pump (electric driven)
                                  •  Sea water cooling pump (electric driven)
                                  •  Temperature control valve
                                • Cooling water preheater steam / thermal oil / electrical
                                  • FW/SW plate cooler
                                    • HT cooling water pump (electric driven)
                                      • LT cooling water pump (electric driven)
                                        • Sea water cooling pump (electric driven)
                                          • Temperature control valve
                                            • Exhaust System
                                              •  Exhaust gas ventilation module
                                              •  Silencer (with or withour spark arrester)
                                            • Exhaust gas ventilation module
                                              • Silencer (with or withour spark arrester)
                                                • 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
                                                • Gas System
                                                  •  Gas flowmeter
                                                  •  LNG vaporizing unit
                                                • Lube System
                                                  •  Lube oil centrifuge
                                                  •  Lube oil pump (electrical driven)
                                                  •  Lube oil treatment and combined modules
                                                  •  Pre-lubricating oil pump (electrical driven)
                                                  •  Temperature control valve
                                                  •  Wet sump with dip stick
                                                • Mounting System
                                                  •  Flexible pipe connections
                                                  •  Resilient mounting
                                                • Propulsion System
                                                  •  Control system
                                                  •  Thrusters
                                                • Starting System
                                                  •  Starting air compressor
                                                  •  Starting air receiver
                                                • Starting air compressor
                                                  • Starting air receiver
                                                    • General
                                                      •  Engine PTO coupling
                                                      •  PTO alternator
                                                      •  PTO shaft on counter-flywheel side
                                                      •  Reduction gear
                                                      •  Reduction gear PTO coupling
                                                    • Engine PTO coupling
                                                      • PTO alternator
                                                        • PTO shaft on counter-flywheel side
                                                          • Reduction gear
                                                            • Reduction gear PTO coupling

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