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C12 High Performance Marine Propulsion Engine

Cat® C12 Diesel Marine Propulsion Engines, with ratings of 578-609 mhp (570-600 bhp) at 2300 rpm, meet IMO I emission standards. The C12 takes full advantage of the electronically controlled unit injection fuel system, resulting in an environmentally friendly engine with outstanding performance and fuel economy. There is also a wide range of optional equipment available to meet the needs of your marine commercial or pleasure craft application.

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Power Range 578-609 mhp (570-600 bhp)
Speed Range 2300 rpm
Emissions IMO I
Aspiration TA
Bore 5.1 in
Stroke 5.9 in
Displacement 732 in³
Rotation from Flywheel End Counterclockwise
Configuration In-line 6, 4-Stroke-Cycle Diesel
Height 39.5 in
Length 62 in
Width 38.1 in
Dry Weight 2588 lb
Air Inlet System
  • Aftercooler - sea water; corrosion resistant, Air Cleaner/Fumes Disposal (closed system), Turbocharger, Jacket Water Cooled
Control System
  • Electronic governing, Cold mode start strategy, Power compensation for fuel temperature, Programmable low idle, Electronic diagnostics and fault logging, Engine and transmission monitoring (speed, temperature, pressure), Fuel/air ratio control, Emergency stop switch (A&B ratings only)
Cooling System
  • Thermostat and housing, Jacket water pump; gear driven, Sea water pump; rubber impeller; self-priming; gear-driven, Integral heat exhanger/expansion tank; removable tube bundle; replaceable copper-nickel tubes, Keel cooling - combined circuit (includes pipe thread flange kit)
Exhaust System
  • Watercooled Manifold & Turbocharger
Flywheels & Flywheel Housings
  • Flywheel; SAE No. 1; 113 teeth, Flywheel housing; SAE No. 1 (10 degree slant pad), SAE standard rotation
Fuel System
  • Fuel filer; RH service on Port; LH service on Starboard, Fuel transfer pump, Fuel priming pump, Flexible fuel lines
Instrumentation
  • Service meter, electric
Lube System
  • Crankcase breather, Oil cooler, Oil filter; spin-on; RH service on Port; LH service on Starboard, Oil filler, Dipstick; RH service on Port; LH service on Starboard, Oil pump; gear driven
Mounting System
  • Front support
Power Take-Offs
  • Hydraulic pump drive; SAE A; 11 tooth spline, 57 ft-lbs max torque; counterclockwise as viewed from the rear of hte engine looking into the pump drive and turns 1.41 x engine speed, Crankshaft pulley; 345 mm (13.6 in) single groove; 15.88 mm (.63in) width
Protection System
  • Shutdown; electronic; 12 or 24 volt; energized to run
General
  • Vibration damper, Lifting eyes, RH or LH service options, Literature, Variable engine wiring, Upper rear-facing customer wiring connector and ECAP connection, Electronic installation kit (connectors, pins, sockets)
Air Inlet System
  • Low Profile Air Inlet Line, Shield (Air Inlet Line)
Charging System
  • Charging Alternators, Voltmeter Guages, Voltmeter Guage Mounting, Alternator Mounting Group
Cooling System
  • Sea Water Pump, Coolant Recovery Tank, Flange Kit
Exhaust System
  • Flexible Fitting, Elbow, Dry Elbow, Watercooled Elbow, Exhaust Connection, Exhaust Outlet Pipe, EXH Outlet Flange, Rain Cap, Muffler
Fuel System
  • Fuel Cooler, Fuel Connections, Primary Fuel Filter, Primary Fuel/Water Separator
Instrumentation
  • OEM Wiring Harness, Engine to Engine Harness, Digital Tachometer, Tachometer Mounting, Magnetic Pickup, RH 4 Hole Instrument Panel, LH 4 Hole Instrument, Marine Power Display System, Marine Power Display Unit (for additional monitoring stations), Marine Power Display Bracket, Wiring Group, Transmission Sensors
Lube System
  • Manual sump pump, Transmission oil cooler
Mounting System
  • Vibration Isolators
Power Take-Offs
  • Crankshaft Pulley, Front Stub Shaft, Front Stub Shaft & Pulley
Starting System
  • Air Pressure Regulator, Air Start Silencer, Start Switch, Jacket Water Heater, Battery sets (24 volt - dry)
General
  • Wiring Harness Removal, Belt Guard - Alternator, Belt Guard - Alternator Pulley, Filter Cover Kit
Packing
  • Overseas Preservation, Engine Protective Cover, Storage Preservation, Export Packing