C12 Commercial Propulsion Engines

Commercial Propulsion Engines C12

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Key Specs

Power Range
340-490 bhp (254-366 bkW)
340-490 bhp (254-366 bkW)
Speed Range
1800-2300 rpm
1800-2300 rpm
Emissions
IMO I, IMO II
IMO I, IMO II

Overview

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.

Product Specifications for C12

Power Range 340-490 bhp (254-366 bkW) 340-490 bhp (254-366 bkW)
Speed Range 1800-2300 rpm 1800-2300 rpm
Emissions IMO I, IMO II IMO I, IMO II
Aspiration TA TA
Bore 5.1 in 130 mm
Stroke 5.9 in 150 mm
Displacement 732 in³ 12 l
Rotation from Flywheel End Counterclockwise Counterclockwise
Configuration In-line 6, 4-Stroke-Cycle Diesel In-line 6, 4-Stroke-Cycle Diesel
Width 38.1 in 969 mm
Length 62 in 1574 mm
Dry Weight 2588 lb 1174 kg
Height 39.5 in 1005 mm

C12 Standard Equipment

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)

C12 Optional Equipment

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

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