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.

Less visible white or black smoke

Lower compression ratio, resulting in less steady state smoke

Improved transient response

Standard Caterpillar warranty

Parts and service support from worldwide dealer organization

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
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)

Additional information

Offering Type

Ratings - Power Range

660-705 bhp (492-526 bkW)

Engine - Speed Range

2300 rpm

Engine - Emissions

IMO II

Engine - Aspiration

TA

Engine - Bore

130.0 mm ( 5.1 in )

Engine - Stroke

150.0 mm ( 5.9 in )

Engine - Displacement

12.0 l ( 732.0 in³ )

Engine - Rotation from Flywheel End

Counterclockwise

Engine - Configuration

In-line 6, 4-Stroke-Cycle Diesel

Dimensions & Weights - Width

969.0 mm ( 38.1 in )

Dimensions & Weights - Dry Weight

1174.0 kg ( 2588.0 lb )

Dimensions & Weights - Length

1574.0 mm ( 62.0 in )

Dimensions & Weights - Height

1005.0 mm ( 39.5 in )

Select Up To 3 Models To Compare