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Minimum Rating292 BHP (218 bkW)
Maximum Rating436 BHP (325 bkW)
Stroke5.87 in (149 mm)
The C9.3 propulsion, auxiliary, and generator set engines have a common rail fuel system for optimal combustion and lower emissions. Cooling system options for the propulsion and auxiliary engines include heat exchanger with sea water aftercooling, and keel with combined circuit or separate circuit aftercooling. The genset packages are available with heat exchanger, keel, or radiator cooling. These products are EPA Tier 3 and IMO II certified. In addition the propulsionengine ratings are EU Stage IIIA certified and auxiliary and gen sets are also CCNR Stage II certified.


Minimum Rating292 BHP (218 bkW)
Maximum Rating436 BHP (325 bkW)
Stroke5.87 in (149 mm)
Bore4.53 in (115 mm)
Displacement568 in³ (9.3 l)
Rotation from Flywheel EndCounterclockwise
ConfigurationIn-Line 6, 4-Stroke-Cycle Diesel
Width - Engine38.5 in (978 mm)
Height43 in (1093 mm)
Length - Engine57.2 in (1452 mm)
Engine Dry Weight - Approximate2083-2474 lbs (945-1122 kg)

Benefits and Features

The electronic control system provides industry-leading torque and throttle response at low speeds, while maintaining fuel efficiency at high speeds

Common rail fuel system enables optimum combustion and low emissions

RH and LH locations for fuel and oil filters and dipstick improves serviceability

Compatible with Cat® displays

Available remote-mounted display panel with start, stop, and engine diagnostics

12V or 24V electrical system

Marine classification society certificates: ABS, BV, CCS, CRS, DNV, GL, IRS, KR, LR, NK, PRS, RINA, RS

Standard Equipment

  • Separate circuit after-cooled (SCAC)
  • Open Crankcase Ventilation (OCV) system
  • Turbocharger, jacket water cooled
  • Turbocharger inlet, 152 mm (6 in) OD straight connection
  • Programmable low idle
  • Electronic diagnostics and fault logging
  • Electronic fuel/air ratio control
  • Engine Protection Mode for extended ambient conditions - EPA Tier 3 Ratings Only
  • 70-pin customer connector
  • Three types of throttle inputs (primary/ secondary PWM, 0-5V, 4-20mA
  • Separate Circuit After-Cooling (SCAC) for both HEX and Keel cooled engines
  • Engine JW and SCAC Shell & Tube Heat Exchangers for HEX cooled engines
  • SCAC pump, gear driven, for HEX cooled engines only
  • Jacket water pump, gear driven
  • Auxiliary water pump, gear driven
  • Sea water pump, bronze impeller, gear driven
  • SCAC and JW shunt tanks for maintaining proper pump inlet pressures
  • 152 mm (6 in) round flanged outlet
  • Water-cooled exhaust manifold & turbocharger
  • Flywheel Housing, SAE No. 0
  • Flywheel, 18 inch, 136 teeth
  • SAE standard rotation
  • Front service simplex fuel system
  • Fuel transfer pump, gear driven
  • Manual fuel priming pump
  • Hybrid fuel line design
  • Front service simplex oil system
  • Center sump oil pan:
  • Front and top service oil filler locations
  • Front service dipstick
  • Oil pump, gear driven
  • Front support - adjustable
  • Hydraulic Pump Drive
  • Crankshaft Pulleys
  • Front Stub Shaft
  • Front Enclosed Clutch
  • Front damper guard
  • Front service engine
  • Common electrical bonding point
  • Engine does not ship with zinc components
  • NOTE: These engines are for constant speed generator set applications only, and NOT to be used for variable speed applications

Optional Equipment

  • Dry Elbows
  • Water-Cooled Elbows
  • Flexible Fitting
  • Flange
  • Muffler
  • Muffler Spark Arresting
  • Air Inlet Adapter
  • Battery Chargers
  • Charging Alternators
  • Alternator Mounting Group
  • Ammeter
  • MECP I - Marine Engine Control Panel
  • Caterpillar Alarm and Protection
  • Load Sharing Attachment
  • Aux Expansion Flange Kit
  • Duplex Fuel Filters
  • Fuel Cooler
  • Primary Fuel Filters
  • Flexible Fuel Lines
  • Instrument Panels
  • OEM Wiring Harness
  • Gauges
  • Oil Level Sensor
  • Duplex Oil Filters
  • Sump Pump
  • Crankshaft Pulleys
  • Front Stub Shaft
  • Hydraulic Pump Drive Adapter
  • Front Enclosed Clutch
  • Marine Classification Society and SOLAS
  • Electric Starting Motors - Single 24 Volt
  • Air Starting Motor
  • Air Start Accessories
  • Starting Aids - JW Heaters
  • Battery Sets - 24 Volt - Dry
  • Front Support
  • Engine Protective Cover
  • Storage Preservation
  • Export Packing