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Cat® C6.6 Diesel Marine Generator Set has three phase ratings of 50 Hertz at 100, 125, and 143 ekW with heat exchanger cooling and at 93, 118, and 136 ekW with radiator cooling that meet U.S. EPA Tier 2 commercial, IMO II, and EU IW emissions standards. The C6.6 also has three phase ratings of 60 Hertz at 125, 150, and 170 ekW with heat exchanger cooling and of 113, 138, and 158 ekW with radiator cooling that meet U.S. EPA Tier 2 commercial, IMO II, and EU IW emissions standards.

Generator Set Specifications

Minimum Rating 93R ekW (212 kVA) 93R ekW (212 kVA) Less
Maximum Rating 170 ekW (116 kVA) 170 ekW (116 kVA) Less
Frequency 50 hz or 60 hz 50 hz or 60 hz Less
Speed 1500 rpm (50 hz) or 1800 rpm (60 hz) 1500 rpm (50 hz) or 1800 rpm (60 hz) Less

Engine Specifications

Engine Model In-line 6, 4-Stroke-Cycle-Diesel In-line 6, 4-Stroke-Cycle-Diesel Less
Bore 4.13 in 105.0 mm Less
Displacement 402.7 in3 6.6 L Less
Stroke 5.0 in 127.0 mm Less
Aspiration Turbocharged-Aftercooled Turbocharged-Aftercooled Less
Governor Type Electronic Electronic Less
Fuel System Common rail Common rail Less

Generator Set Configurations

Emissions/Fuel Strategy EPA Tier 2/IMO II, EU IW EPA Tier 2/IMO II, EU IW Less

Generator Set Dimensions

Weight 2972 lb - 3675 lb (1348 kg - 1667 kg) 2972 lb - 3675 lb (1348 kg - 1667 kg) Less
Length 75.0 in - 104.7 in (1905 mm - 2660 mm) 75.0 in - 104.7 in (1905 mm - 2660 mm) Less
Width 51.8 in - 55.7 in (1315 mm - 1416 mm) 51.8 in - 55.7 in (1315 mm - 1416 mm) Less
Height 37.8 in (961 mm) 37.8 in (961 mm) Less

Generator Specifications

Frame Size 44.2/46.2 44.2/46.2 Less
Excitation AREP AREP Less
Pitch 2/3 2/3 Less
Number of leads 12 12 Less
Insulation Class H Class H Less
Voltage Regulation ±0.5% ±0.5% Less


The electronic control of the 6.6 liter engine with ACERT Technology simultaneously optimizes fuel economy and performance while meeting the most stringent emissions standards. The electronic governor ensures power quality that’ssuitable for sophisticated equipment, such as computers and other electronics.


Competitive pricing, outstanding fuel efficiency, extended serviceintervals, and ultra long life, all contribute to the overall low owning and operating costs of the C6.6 ACERT

Environmental responsibility

The C6.6 ACERT is IMO emission-compliant; both 60 Hz and 50 Hzmeet EPA Tier II regulations.

Peace of mind

The Caterpillar 12-month warranty and available ExtendedService Coverage keep the C6.6 ACERT — and your operation — on a smooth course.


C6.6 ACERT packages offer six ratings. Three standard coolingoptions are also available: Sea water after cooling, keel cooling, and radiator cooling. In addition, the C6.6 ACERT is compatiblewith a variety of fuels, including kerosene, jet aviation fuel, and 20 percent bio-fuel.


Automatic safety shutdowns include low oil pressure, high water temperature, and overspeed.

C6.6 ACERT Standard Equipment

Air Inlet System
  • Air cleaner, single element canister type withservice indicator and rain cap; dry insulatedturbocharger; glowplug cold start system

Cooling System
  • Radiator cooled package (sized for up to 50°Cambient air) incorporating deaeration expansiontank, plate-type engine oil cooler, gear-drivencentrifugal jacket water pump, Caterpillar®Extended Life Coolant

Exhaust System
  • Dry insulated turbocharger, water-cooled exhaustmanifoldsA

Fuel System
  • Primary fuel filter/water separator, secondary fuelfilter (LH), fuel priming pump

  • 12-lead reconnectable, 3-phase all models,brushless, separately excited from auxiliarywinding to provide 300% short circuit current upto 10 seconds, 2/3 pitch, broad voltage band, IP23water protection, solid state voltage regulator withintegral voltage adjustment potentiometer, Class Hinsulation, connection poles

Governing System
  • Electronic governor

Lube System
  • Lubricating oil, oil filter (RH), dipstick (RH), fumesdisposal (crankcase ventilation system)A

Mounting System
  • Anti-vibration mountsA

Starting/Charging System
  • Negative isolated ground electric system

C6.6 ACERT Optional Equipment

Control System
  • Governor droop kit (selecting this kit enablesparalleling with appropriate customer-suppliedswitchgear

Generators & Generator Attachments
  • Space heater kit, installed — 120V AC, 240V AC

Fuel System
  • Double wall fuel lines and mounted alarm reservoir

Starting System
  • Jacket-water heater options, additional 12 or24 volt starter

Marine Classification Society (MCS) Approval
  • MCS approved packages in process at time of print

  • PGS test report @ 0.8 power factor, extra literature,
  • storage preservation
  • export packing:

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