C12 Propulsion Engine

Power Range	340-490 bhp (254-366 bkW)
Speed Range	1800-2300 rpm
Emissions	IMO I, IMO II
Aspiration	TA
Bore	5 in
Stroke	6 in

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Power Rating

Power Range	340-490 bhp (254-366 bkW)
Power Range	340-490 bhp (254-366 bkW)

Engine Specifications

Speed Range	1800-2300 rpm
Emissions	IMO I, IMO II
Aspiration	TA
Bore	5 in
Stroke	6 in
Displacement	732 in3
Configuration	In-line 6, 4-Stroke-Cycle Diesel
Rotation from Flywheel End	Counterclockwise
Speed Range	1800-2300 rpm
Emissions	IMO II, U.S. EPA T3
Aspiration	Turbocharged - Aftercooled
Bore	5 in
Stroke	6 in
Displacement	732 in³

Dimensions & Weights

Dry Weight	2,588 lb
Width	38 in
Length	62 in
Height	40 in
Dry Weight	2,588 lb
Width	38 in

ADEM III Control System

More control inputs and outputs, capacity for additional features, additional monitoring capabilities, expansion capability for future enhancements

Most Advanced Electronic Control System

Adjustment free control of engine speed, customer defined operating characteristics, protection and warning system, optional display systems available

Future Enhancement Capability

The electronic control system has additional capacity for future enhancements to ensure a long useful engine life.

Redesigned Exhaust Manifold

Provides a smoother passage for improved exhaust gas flow to the turbocharger which leads to more usable energy and lower exhaust temperatures.

Easy Replacement for 3196

The C12 has the same physical size, same footprint, and the same connection points as the 3196 engine as well the same optional attachments.

Optional Monitoring System

Caterpillar offers several “plug and play” monitoring systems which display everything from the basic engine operating parameters to engine load factor and trip totals. Ask your local Caterpillar dealer for additional information on our Marine Power Display (MPD), Marine Analog Power Display (MAPD), and our Engine Vision Display (EVD).

Product Support

Trained technicians at over 1800 authorized service locations worldwide support Caterpillar products. Use our Internet Dealer Locator www.cat.com to identify the Caterpillar dealer location nearest to you.

Warranty

C-12 Marine Propulsion engines used in commercial applications are covered for 12 months from the date of delivery to the end user. Engines used in non-revenue producing pleasure craft applications are covered for 24 months, unlimited hours, from the date of delivery. Concurrently, specific engine components are covered for 60 months, unlimited hours, from the date of delivery to the end user.

Extended Service Coverage (ESC)

Optional engine protection coverage for up to 60 months from date of delivery may be purchased through your local Caterpillar dealer.

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