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Cat C32 Propulsion Engine (IMO II)

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.

Power Rating

Power Range

660-1450 bhp (492-1081 bkW)

Engine Specifications

Speed Range

1600-2300 rpm











Rotation from Flywheel End



Vee 12, 4-Stroke-Cycle Diesel

Dimensions & Weights

Minimum Dry Weight


Minimum Length


Maximum Length


Minimum Height


Maximum Height


Minimum Width


Maximum Width


Standard Equipment:

  • Air Inlet System
    • Separate Circuit After-Cooled (SCAC
    • 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
  • 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
  • Exhaust System
    • 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
  • 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

Optional Equipment:

  • 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
  • Lube System
    • 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
  • Mounting System
    • Front Support
    • Adapter Kits
    • Isolator Mounts
  • Power Take-offs
    • Front Enclosed Clutches
    • Rear Hydraulic Pump Drive
  • General
    • Fumes Disposal
  • Control System
    • Instrument Panels
    • Fuel and Oil Shielding

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