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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 32 E Marine Propulsion Engine

Caterpillar Motoren designed the M 32 E based on the reliable M 32 C engine series. The M 32 E will share the same footprint as the successful M 32 C. The M 32 E is the first MaK 5 MW engine in the 320 mm bore segment. The new design still supports operation at any ambient condition without load reduction.

  • Specification Summary

  • Power Range3300 - 4950 kW
  • Speed Range720-750 rpm
  • EmissionsIMO II
  • AspirationTurbocharged
  • Bore320 mm
  • Specification Sheet

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Product Details

Power Rating

Power Range 3300 - 4950 kW

Engine Specifications

Speed Range 720-750 rpm
Emissions IMO II
Aspiration Turbocharged
Bore 320 mm
Stroke 480 mm
Displacement 37.0 L
Rotation (from flywheel end) Counterclockwise/Clockwise
Configuration 6,8,9 Cylinder

Dimensions & Weights

Minimum Dry Weight 37.5 kg
Minimum Length 6055 mm
Maximum Length 7850 mm
Minimum Height 3862 mm
Maximum Height 4406 mm
Minimum Width 2195 mm
Maximum Width 2195 mm
  • Air Inlet System
    •  Air intake silencer/filter
  • Air intake silencer/filter
    • Control System
      •  Load sharing unit (for multiple engine plant only)
      •  Modular Alarm Control and Protection System (MACS)
      •  Serial link interface (MODbus / canbus)
      •  Speed governor
    • Load sharing unit (for multiple engine plant only)
      • Modular Alarm Control and Protection System (MACS)
        • Serial link interface (MODbus / canbus)
          • Speed governor
            • Cooling System
              •  2-stage charge air cooler
              •  Electronic cooling water preheater
              •  HT cooling water pump (engine driven)
            • Exhaust System
              •  Exhaust gas expansion joint
              •  Exhaust gas insulated manifolds
              •  Turbocharger at flywheel end
            • Fuel System
              •  Fuel circulating pump (attached / for MDO/MGO only)
              •  Fuel indicator filter
              •  Fuel pressure valve (attached / for MDO/MGO only)
            • Instrumentation
              •  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
            • Electrical barring device
              • Starting air valve
                • General
                  •  Lifting device (rental)
                  •  Torsional Vibration Calculation (TVC)
                • Air Inlet System
                  •  Air inlet shut-off valve
                  •  Air inlet transition piece
                  •  Expansion joint
                  •  Silencer/filter
                • Control System
                  •  Air injection control (for better load acceptance)
                  •  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
                • Air injection control (for better load acceptance)
                  • 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
                              • 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 spart arrester)
                                            •  Turbocharger at counter-flywheel side
                                          • Silencer (with or without spart arrester)
                                            • 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 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
                                              • 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
                                                        •  Part load optimization kit for constant speed engine (SFOC improvement, smoke reduction)
                                                        •  Part load optimization kit for variable speed engine (massive SFOC improvement,…)
                                                        •  PTO alternator
                                                        •  PTO shaft on counter-flywheel side
                                                        •  Reduction gear
                                                        •  Reduction gear PTO coupling
                                                      • Cat Propulsion Systems
                                                        • Engine PTO coupling
                                                          • Part load optimization kit for constant speed engine (SFOC improvement, smoke reduction)
                                                            • Part load optimization kit for variable speed engine (massive SFOC improvement,…)
                                                              • PTO alternator
                                                                • PTO shaft on counter-flywheel side
                                                                  • Reduction gear
                                                                    • Reduction gear PTO coupling

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