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Cat® C12 Diesel Marine Propulsion Engines, with ratings of 340-490 bhp (254-366 bkW) at 1800-2300 rpm, meet IMO II emission standards with the exception of the 497 mhp (490 bhp) rating at 2300 rpm which meets IMO I emissions 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.
Request a QuotePower Range340-490 bhp (254-366 bkW)
Speed Range1800-2300 rpm
EmissionsIMO I, IMO II
AspirationTA
Bore5.1in
Stroke5.9in
Displacement732in³
Rotation from Flywheel EndCounterclockwise
ConfigurationIn-line 6, 4-Stroke-Cycle Diesel
Width38.1in
Length62in
Dry Weight2588lb
Height39.5in
Standard
Aftercooler - sea water; corrosion resistant, Air Cleaner/Fumes Disposal (closed system), Turbocharger, Jacket Water Cooled
Optional
Low Profile Air Inlet Line, Shield (Air Inlet Line)
Standard
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)
Standard
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)
Optional
Sea Water Pump, Coolant Recovery Tank, Flange Kit
Standard
Watercooled Manifold & Turbocharger
Optional
Flexible Fitting, Elbow, Dry Elbow, Watercooled Elbow, Exhaust Connection, Exhaust Outlet Pipe, EXH Outlet Flange, Rain Cap, Muffler
Standard
Flywheel; SAE No. 1; 113 teeth, Flywheel housing; SAE No. 1 (10 degree slant pad), SAE standard rotation
Standard
Fuel filer; RH service on Port; LH service on Starboard, Fuel transfer pump, Fuel priming pump, Flexible fuel lines
Optional
Fuel Cooler, Fuel Connections, Primary Fuel Filter, Primary Fuel/Water Separator
Standard
Service meter, electric
Optional
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
Standard
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
Optional
Manual sump pump, Transmission oil cooler
Standard
Front support
Optional
Vibration Isolators
Standard
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
Optional
Crankshaft Pulley, Front Stub Shaft, Front Stub Shaft & Pulley
Standard
Shutdown; electronic; 12 or 24 volt; energized to run
Standard
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)
Optional
Wiring Harness Removal, Belt Guard - Alternator, Belt Guard - Alternator Pulley, Filter Cover Kit
Optional
Charging Alternators, Voltmeter Guages, Voltmeter Guage Mounting, Alternator Mounting Group
Optional
Air Pressure Regulator, Air Start Silencer, Start Switch, Jacket Water Heater, Battery sets (24 volt - dry)
Optional
Overseas Preservation, Engine Protective Cover, Storage Preservation, Export Packing
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