• Banner
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.

Cat C32 ACERT Marine Propulsion Engine (EPA Tier 3)

The C32 ACERT marine propulsion engine is available at ratings that meet both EPA Tier 3 and IMO II emissions regulations. It has a separate circuit aftercooling system (SCAC) for A through C ratings and a seawater aftercooling system (SWAC) for D and E ratings. The C32 ACERT has seven ratings with Wide Operating Speed Range (WOSR) and extended oil change intervals. Other benefits include proven engine operating history and performance iron with thousands of validation testing hours for quality and durability. The C32 ACERT marine engine is supported by the extensive Cat global dealer network and Caterpillar’s 60 month standard warranty.

  • Specification Summary

  • Power Range 750-1450 bhp (559-1081 bkW)
  • Speed Range 1600-2300 rpm
  • Emissions EPA Tier 3, IMO II, EU IW
  • Aspiration TTA

Product Details

Power Rating

Power Range 750-1450 bhp (559-1081 bkW)
Continuous Ratings - Maximum Power 746 bkW
Heavy Duty Ratings - Maximum Power 895 bkW
Maximum Continuous Ratings - Maximum Power 1081 bkW

Engine Specifications

Speed Range 1600-2300 rpm
Emissions EPA Tier 3, IMO II, EU IW
Aspiration TTA
Bore 145 mm
Stroke 162 mm
Displacement 32.1 L
Rotation (from flywheel end) Counterclockwise
Configuration Vee 12, 4-Stroke-Cycle Diesel

Dimensions & Weights

Minimum Dry Weight 3152 kg
Minimum Length 2121 mm
Maximum Length 2284 mm
Minimum Height 1547 mm
Maximum Height 1587 mm
Minimum Width 1528 mm
Maximum Width 1528 mm
  • AIR INLET SYSTEM
    •  Separate Circuit After-Cooled (SCAC)
    •  Seawater After-Cooling (SWAC) System
    •  Air cleaner
    •  Turbochargers, jacket water cooled
    •  Turbochargers inlet, 152 mm (6 in) OD straight connection
  • CONTROL SYSTEM
    •  Programmable Low Idle (550 - 750 rpm)
    •  WOSR (Wide Operating Speed Range) available for - A, B, & C Ratings
    •  Programmable High Idle Limit for WOSR Ratings
    •  Electronic diagnostics and fault logging
    •  Engine and transmission monitoring (speed, temperature, pressure)
    •  Electronic fuel/air ratio control
    •  Engine Protection Mode for extended ambient conditions
    •  Torque Limiting functionality for WOSR ratings only
    •  70-pin customer connector
    •  Throttle Input signal options
  • Programmable Low Idle (550 - 750 rpm)
    • WOSR (Wide Operating Speed Range) available for - A, B, & C Ratings
      • Programmable High Idle Limit for WOSR Ratings
        • Electronic diagnostics and fault logging
          • Engine and transmission monitoring (speed, temperature, pressure)
            • Electronic fuel/air ratio control
              • Engine Protection Mode for extended ambient conditions
                • Torque Limiting functionality for WOSR ratings only
                  • 70-pin customer connector
                    • Throttle Input signal options
                      • COOLING SYSTEM
                        •  Separate Circuit After-Cooling (SCAC) for Heat Exchanged (HEX) & Keel cooled engines
                        •  Jacket Water (JW) and SCAC Heat Exchangers Shell & Tube for HEX cooled engines
                        •  SCAC pump, gear driven
                        •  Jacket water pump, gear driven
                        •  Sea water pump, bronze impeller, gear driven, for HEX cooled engines only
                        •  Sea water Pump & JW Heat Exchanger Connection: 76.2 mm (3in) ID Standard
                        •  Keel Connections: 76.2 mm (3in) ID Standard 4 Bolt ANSI Flange Connection
                        •  SCAC and JW shunt tanks for maintaining proper pump inlet pressures
                        •  Seawater After-Cooling (SWAC) System
                      • EXHAUST SYSTEM
                        •  4 Bolt 130 mm (5.12 in) diameter flanged outlet
                        •  Water-cooled exhaust manifold & turbocharger
                      • 4 Bolt 130 mm (5.12 in) diameter flanged outlet
                        • Water-cooled exhaust manifold & turbocharger
                          • FLYWHEELS & FLYWHEEL HOUSINGS
                            •  SAE standard rotation (CCW facing exciter end)
                            •  Flywheel Housing: SAE No. 0, Flywheel: 18 inch, 136 teeth
                          • FUEL SYSTEM
                            •  Duplex Fuel Filters, Spin-on, RH & LH service
                            •  Fuel connections size:Supply JIC 37 Deg -10 (7/8-14), Return JIC 37 Deg -8 (3/4-16)
                            •  Plate Type Fuel Cooler installed behind Aftercooler Shunt Tank
                            •  Fuel transfer pump, gear driven
                            •  Manual fuel priming pump
                            •  Hybrid fuel line design
                          • Duplex Fuel Filters, Spin-on, RH & LH service
                            • Fuel connections size:Supply JIC 37 Deg -10 (7/8-14), Return JIC 37 Deg -8 (3/4-16)
                              • Plate Type Fuel Cooler installed behind Aftercooler Shunt Tank
                                • Fuel transfer pump, gear driven
                                  • Manual fuel priming pump
                                    • Hybrid fuel line design
                                      • LUBE SYSTEM
                                        •  Simplex Oil Filters, RH or LH service
                                        •  Deep sump oil pan
                                        •  RH or LH service oil filler locations
                                        •  RH or LH service dipstick
                                        •  Oil pump, gear driven
                                      • MOUNTING SYSTEM
                                        •  Front support - adjustable
                                      • POWER TAKE-OFFS
                                        •  Front Poly-V groove pulley (Quantity 1) for auxiliary drives
                                      • GENERAL
                                        •  Common electrical bonding point
                                        •  Engine does not ship with zinc components
                                      • Air Inlet Systems
                                        •  Air Inlet Cleaner
                                        •  Air Inlet Adapter
                                      • Charging Systems
                                        •  Battery Charger
                                        •  Charging Alternators
                                        •  Ammeter
                                      • Cooling System
                                        •  Marine Gear/Transmission Oil Coolers
                                        •  Connections
                                      • Exhaust System
                                        •  Dual Elbow
                                        •  Flexible Fitting
                                        •  Dual Muffler
                                        •  Muffler Spark Arresting
                                        •  Flange
                                      • Fuel System
                                        •  Water Separator
                                      • Instrumentation
                                        •  OEM Wiring Harness
                                        •  Engine to Engine Harness
                                        •  Instrument Panels
                                        •  Exhaust Temperature Sensors
                                        •  Wiring Harness
                                        •  Gauges
                                        •  Transmission Sensors
                                      • OEM Wiring Harness
                                        • Engine to Engine Harness
                                          • Instrument Panels
                                            • Exhaust Temperature Sensors
                                              • Wiring Harness
                                                • Gauges
                                                  • Transmission Sensors
                                                    • Lube System
                                                      •  Transmission Oil Cooler
                                                      •  Manual Sump Pump
                                                      •  Duplex Oil Filters
                                                    • Transmission Oil Cooler
                                                      • Manual Sump Pump
                                                        • Duplex Oil Filters
                                                          • Protection System
                                                            •  Fuel and Oil Shielding
                                                          • Starting System
                                                            •  Air Starting Motor
                                                            •  Air Start Accessories
                                                            •  Electric Starting Motors - Single 24 Volt
                                                            •  Starting Aids
                                                            •  Battery Sets - 24 Volt - Dry
                                                            •  Dual Starting Motors (Electric and Air)
                                                          • Packing
                                                            •  Engine Protective Cover
                                                            •  Export Packing
                                                            •  Storage Preservation
                                                          • Engine Protective Cover
                                                            • Export Packing
                                                              • Storage Preservation
                                                                • Mounting System
                                                                  •  Front Support
                                                                  •  Adapter Kits
                                                                  •  Isolator Mounts
                                                                • Front Support
                                                                  • Adapter Kits
                                                                    • Isolator Mounts
                                                                      • Power Take-Offs
                                                                        •  Front Enclosed Clutches
                                                                        •  Rear Hydraulic Pump Drive
                                                                      • GENERAL
                                                                        •  Fumes Disposal
                                                                      • Fumes Disposal
                                                                        • CONTROL SYSTEM
                                                                          •  Instrument Panels
                                                                          •  CATERPILLAR ALARM AND PROTECTION
                                                                          •  Fuel and Oil Shielding
                                                                        Built for it