New | Cat® C4.4 Marine Generator Set

Cat® C4.4 Diesel Marine Generator Set has three phase ratings of 50 Hertz at 38.0, 51.5, and 69.0 ekW with heat exchanger cooling and at 36.0, 49.0, and 65.0 ekW with radiator cooling that meet EU CCNR2 emissions standards. The C4.4 also has three phase ratings of 60 Hertz at 44.0, 58.5, 76.0, and 99.0 ekW with heat exchanger cooling and of 42.0, 56.0, 72.0, and 95.0 ekW with radiator cooling. C4.4 gen set is available in 12 or 24 volt as an open gen set or as an enclosed package. Single-side servicing improves ease of maintenance and lowers overall owner operating costs. The compact package size is ideal for a wide range of commercial and pleasure craft applications. These ratings also have Marine Classification Society approved packages available.

Generator Set Specifications
Minimum Rating36.0R ekW (45 kVA)
Maximum Rating99.0 ekW (123 kVA)
Frequency50 Hz or 60 Hz
Speed1500 rpm or 1800 rpm
Generator Set Configurations
Emissions/Fuel StrategyEPA Tier 2 (60 Hz), EU 97/68EC Stage II (50 Hz)
Engine Specifications
Engine ModelIn-line 4, 4-Stroke-Cycle Diesel
AspirationNA, T, TA
Bore4.13 in
Stroke5.0 in
Displacement269.0 in3
Governor TypeElectronic
Generator Specifications
ExcitationSeparately excited from auxiliary winding to provide 300% short circuit current up to 10 seconds
Number of leads12 lead reconnectable
InsulationClass H
IP RatingIP23 water protection (IP44 available for certain models, contact your dealer for information)
Voltage regulatorSolid state voltage regulator with integral voltage adjustment potentiometer
Generator Set Dimensions
Length68.9 in
Width47.8 in
Height39.4 in
Weight805 kg (1775 lb) - 1015 kg (2338 lb)

Low Owning And Operating Costs With Competitive Pricing, Longlife Construction, And Extended Service Intervals

Plug And Play Remote Instrument Panels

Low Emission, Noise, And Vibration Levels; 60 Hz Meets Epa Tier 2, 50 Hz Meets Eu 97/68ec Stage Ii Regulations

Automatic Shutdowns For Overspeed, High Fresh Water Temperature, Low Engine Oil Pressure, And High Exhaust Temperature (when Fitted With A Wet Exhaust System).

Available As An Open Set Or With Sound Attenuated Enclosure, And With Radiator-, Heat Exchanger-, Or Keel-cooled Options

Suitable For Sophisticated On-board Equipment (computers, Etc.)

Reduced Service Costs And Port Time

Standard Equipment

Air Inlet System
  • Air cleaner, single element canister type w/ service indicator and rain cap
  • Dry insulated turbocharger (DIT and DITA models only)
  • Glowplug cold start system
Cooling System
  • Heat exchanger cooled packages w/ Cupro-nickel tube bundle (sized for 50 o C ambient air and 32 o C sea water) or Keel cooled packages (sized for 50 o C ambient air)
  • De-aeration expansion tank
  • Plate-type engine oil cooler
  • Gear driven centrifugal jacket water pump
  • Gear driven self priming sea water pump
  • Caterpillar Extended Life Coolant (heat exchanger cooled packages)
Exhaust System
  • Dry insulated turbocharger
  • Water-cooled exhaust manifolds
Fuel System
  • Primary fuel filter / water separator w/ NPT and BSP connectors (ship loose)
  • Secondary fuel filter (LH)
  • Fuel priming pump electric
  • Energize to run shutoff solenoid
  • 12 lead reconnectable
  • 3 phase all models
  • Brushless
  • Separately excited from auxiliary winding to provide 300% short circuit current up to 10 seconds
  • 2/3 pitch
  • Broad voltage band
  • IP23 water protection
  • Solid state voltage regulator w/ integral voltage adjustment potentiometer
  • Class H insulation
  • Connection poles
Lube System
  • Lubricating oil
  • Oil filter (LH)
  • Dipstick (LH)
  • Fumes disposal (closed system)
Mounting System
  • Steel base frame with drip pan
  • Anti-vibration mounts
Starting/Charging System
  • Negative isolated ground electric system
  • Single side service (LH)
  • Keel cooled gensets do not include the keel cooler(s)

Optional Equipment

On-board spars and tool kit
AC circuit breaker
Siphon break
Duplex secondary fuel filter
Governor droop kit (enables paralleling with appropriate customer supplied switchgear)
Remote expansion tank kit
Double wall fuel lines and mounted alarm reservoir
Flexible fuel lines
Primary fuel filter with water separator
Space heater kit
  • 240V AC, 120V AC
Remote start/stop panels
Air starter
Jacket water heater



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