New | Cat® C4.4 ACERT Marine Generator Set

The C4.4 ACERT marine genset packages with heat exchanger or keel cooling are available with 60 Hz ratings of 60, 75, 99, 118 ekW and 50 Hz ratings of 65, 80, 99 ekW. Radiator cooled gen sets are with 60 Hz ratings of 51, 66, 90, and 105 ekW and 50 Hz ratings of 58, 73, and 88 ekW. The C4.4 ACERT meets U.S. EPA Tier 3 and EU CCNR Stage II emissions regulations. The C4.4 ACERT is electronically controlled with a Common Rail fuel system.

Generator Set Specifications
Minimum Rating58R ekW (50 Hz), 51R ekW (60 Hz)
Maximum Rating88R ekW (50 Hz), 105R ekW (60 Hz)
Frequency50 Hz or 60 Hz
Speed1500 rpm or 1800 rpm
Emissions/Fuel StrategyU.S. EPA Tier 3 / CCNR Stage 2
Engine Specifications
Bore4.13 in
Stroke5 in
Displacement269 in³
Governor TypeElectronic
Engine ModelI-4, 4-Stroke-Cycle-Diesel
Generator Set Dimensions
Weight2518-2844 lb (1142 - 1290 kg)
Length66.9-69.6 in (1699-1769 mm), 80.2R in (2037R mm)
Width37.6 inches (radiator - 38.8 inches)
Height49.0 inches (1245 mm)
Generator Specifications
Number of Leads12-lead reconnectable
InsulationClass H
IP RatingIP23
Voltage Regulator±0.5%

New Block For Low Noise And Vibrations, Insulated Timing Case Cover, Isolated Oil Pan (also Provides Ease Of Maintenance), Improved Pump And Gear Train System, Stiffer Crankshaft, Multiple Fuel Injection Strategy, 4 Valve Cross Flow Head, Double Curvature On Thick Walled Crankcase, Piston Optimized For High Speed Operation

Hydraulic Tappet Adjustment Removes The Need For Manual Tappet Adjustment, That On The 1006 (c6.6) Needed To Happen Every 500 Hours. This System Is Operated By Oil Pressure, And This Saves The Customers A Considerable Amount Of Cost From An Operating Perspective.

Improved Smoke Levels From C4.4 Mechanical Engine

These Belts Are More Efficient, As They Provide More Drive Surface. Less Heating Is Created During Running, And The Belt Will Also Last Longer. The Poly V Belt Cannot Twist Over Like A Single V Belt, And Any Wear Of The Poly V Belt Becomes Apparent A Long Time Before Failure.

Suitable For Wide Range Of Auxiliary Accessories

Lower Servicing Costs, Reduced Down Time

Suitable For “gas Tight” Applications

Meets Customer Requirements In: Voltage, Cooling, Twin Pocket Fly Wheel Housing, And Factory Options For Starting

Fully Packaged Generator Set

Advanced fuel and combustion system with 4 valves per cylinder

Oil System Holds 11l (2.8 Gal), 500-Hour Oil Change Interval, Max Continuous Operation Angle Is 25⁰ (any Direction), Max Intermittent Operation Angle 30⁰ (any Direction), Simplex And Duplex Oil Filters Options Available

Control Panel Standard On Lhs With Single Leg Box, Control Panel Location Interchangeable Between 3 Positions Available As Option

Standard Equipment

Air Inlet System
  • Open Crankcase Ventilation (OCV) system
  • Turbocharger, jacket water cooled
  • Integrated coolant lines into manifold utilizing EGR circuit
Cooling System
  • Integrated heat exchanger and aftercooler
  • Compact design integral coolant passages
  • Thermostat and housing
  • Jacket Water Heater 120/240V option
  • Auxiliary seawater pump, gear driven
  • Engine mounted heat exchanger, removable tubeBundle (for sea water) (heat exchanger engines only)
  • Engine oil cooler
  • Auxiliary sea water lines
  • Keel cooling
Exhaust System
  • Dry insulated turbocharger
  • Water-cooled exhaust manifolds
  • 102 mm (4 in) round flanged outlet
  • Dry Elbow/Bellows/Flange options
Fuel System
  • Common Rail Fuel System
  • Simplex and Duplex Fuel options
  • Flexible fuel line option
  • Fuel transfer pump, gear driven
  • 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
  • Class H insulation
  • Generator winding temperature rise meets marine society requirements.
Governing System
  • Electronic governor
  • Electronic
Lube System
  • Lubricating oil
  • Oil filter, RH Service
  • Simplex and Duplex options
  • Crankcase breather
  • Oil filler, in valve cover and timing case (option)
  • Oil level gauge, RH service
  • Oil pan
  • Oil pan drain, RH
  • Engine oil pump (gear driven)
Mounting System
  • Formed C-channel rails
  • Anti vibration isolators between base and engine-generator
Control System
  • Panels available in RH, LH, and rear configurations with a remote mount option
  • Electronic diagnostics and fault logging
  • Electronic governor
  • Electronic Control Module (ECM)
  • SAE J1939 data link Ratings Only
  • Electronic fuel/air ratio control
Flywheels & Flywheel Housings
  • Flywheel Housing, SAE No. 3
  • Flywheel, 126 teeth
  • SAE standard rotation
Power Take-Offs
  • Multi-V groove for alternator drive
  • PTO Shaft Kit (optional)
  • Single side service (LH)
  • Keel cooled gensets do not include the keel cooler(s)
  • Lifting eyes
  • Protective lifting covers
  • Battery disconnect switch
  • Note: Keel-cooled gen sets do not include the keel cooler(s).

Optional Equipment

Power Take-Offs
  • Crankshaft Pulley - Crankshaft PTO Shaft, Engine Turning Device
Special Tests/Reports
  • Test Certificate at Rated PWR
Generators and Generator Attachments
  • 110V Anti-Condensation Heater
  • 230V Anti-Condensation Heater
Exhaust System
  • Dry Elbow
  • Dry Flange
  • Dry Elbow and Bellows



Other Models in this Category

Select Marine Power System Type

Hawthorne Power Systems Logo

Request a Quote

Why Cat is Better. Machine Comparison

With only a few days notice, we were able to get the emergency system working properly. Hawthorne Cat provided great leadership and excellent field support.
Mark Cripe
Helix Electric

San Diego - Power
Kyle Farmer
Engine Business Manager
858.376.6821 office
760.715.9565 mobile

Tim Roberts
Product Support
General Manager
858.376.6820 office
858.583.8460 mobile

Mark Reza
Used Engine Sales Manager
858.376.6840 office
858.688.0076 mobile

Jeff Reid
Service Manager
858.376.6890 office
858.472.1852 mobile

Hawaii – Power
Cliff Yuen
Director of Sales & Rentals
808.676.0322 office
808.349.7767 mobile

Guam – Power
Myver Hecita
Power Systems Rental &
Sales Representative
671.649.4241 office
671.898.2740 mobile