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C12 ACERT™ High Performance Propulsion Engine

Cat® C12 ACERT Diesel Marine Propulsion Engines, with ratings of 669-715 mhp (660-705 bhp) at 2300 rpm, meet IMO II 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 specific pleasure craft application.

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Power Range 660-705 bhp (492-526 bkW)
Speed Range 2300 rpm
Emissions IMO II
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
Width 38.1 in
Dry Weight 2588 lb
Length 62 in
Height 39.5 in
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
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