Cat C32 Propulsion Engine (IMO II)

The C32 marine propulsion engine is available at ratings that meet IMO II emissions regulations. It has a separate circuit aftercooling system (SCAC) for A through C ratings, six 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 marine engine is supported by the extensive Cat global dealer network and Caterpillar’s standard warranty.


IMO II - meets the International Maritime Organization's Regulation 13 of Revised Annex VI to the MARPOL Convention.

Worldwide Support

Extensive service network of Cat Dealers and unparalleled service from authorized marine dealers


The C32 ACERT has proven engine operating history. It consists of performance iron with thousands of hours of validation testing for quality and durability.


Backed by Caterpillar's standard warranty

Six Ratings with Wide Operating Speed Range (WOSR)

Excellent reserve power for acceleration, Ideal for applications requiring the engine to operate normally at more than one speed or load, Provides an alternative to torque converters, multi-speed transmissions, Controllable Pitch Propeller (CPP)

Extended Oil Change Intervals

Seperate Circuit Aftercooling System: A-C Ratings

No seawater circulating through the aftercooler, isolator mounts available as optional attachments, mounting and isolator base require wider stringer without vertical adjustment nut (adjustable height), thrust (recommended for remote gear) and non-thrust (recommended for close gear) options available

Standard Equipment

  • Separate Circuit After-Cooled (SCAC
  • Air cleaner
  • Turbochargers, jacket water cooled
  • Turbochargers inlet, 152 mm (6 in) OD straight connection
  • 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
  • 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
  • 4 Bolt 130 mm (5.12 in) diameter flanged outlet
  • Water-cooled exhaust manifold & turbocharger
  • SAE standard rotation (CCW facing exciter end)
  • Flywheel Housing: SAE No. 0, Flywheel: 18 inch, 136 teeth
  • 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
  • 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
  • Front support - adjustable
  • Front Poly-V groove pulley (Quantity 1) for auxiliary drives
  • Common electrical bonding point
  • Engine does not ship with zinc components

Additional information

Offering Type

Power Rating - Power Range

660-1450 bhp (492-1081 bkW)

Engine Specifications - Speed Range

1600-2300 rpm

Engine Specifications - Emissions


Engine Specifications - Aspiration


Engine Specifications - Bore

145.0 mm ( 5.71 in )

Engine Specifications - Stroke

162.0 mm ( 6.38 in )

Engine Specifications - Displacement

32.1 l ( 1959.0 in³ )

Engine Specifications - Rotation from Flywheel End


Engine Specifications - Configuration

Vee 12, 4-Stroke-Cycle Diesel

Dimensions & Weights - Minimum Dry Weight

3152.0 kg ( 6950.0 lb )

Dimensions & Weights - Minimum Length

2121.0 mm ( 77.8 in )

Dimensions & Weights - Maximum Length

2284.0 mm ( 83.5 in )

Dimensions & Weights - Minimum Height

1547.0 mm ( 60.9 in )

Dimensions & Weights - Maximum Height

1587.0 mm ( 62.5 in )

Dimensions & Weights - Minimum Width

1528.0 mm ( 60.17 in )

Dimensions & Weights - Maximum Width

1528.0 mm ( 60.17 in )

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