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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
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.


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
Bore4.13 in (105 mm)
Stroke5 in (127 mm)
Displacement269 in³ (4.4 l)
Governor TypeElectronic
Number of Leads12-lead reconnectable
InsulationClass H
IP RatingIP23
Voltage Regulator±0.5%
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)
Engine ModelI-4, 4-Stroke-Cycle-Diesel
Emissions/Fuel StrategyU.S. EPA Tier 3 / CCNR Stage 2

Benefits and Features

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

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

  • Open Crankcase Ventilation (OCV) system
  • Turbocharger, jacket water cooled
  • Integrated coolant lines into manifold utilizing EGR circuit
  • 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
  • Dry insulated turbocharger
  • Water-cooled exhaust manifolds
  • 102 mm (4 in) round flanged outlet
  • Dry Elbow/Bellows/Flange options
  • 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.
  • Electronic governor
  • Electronic
  • 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)
  • Formed C-channel rails
  • Anti vibration isolators between base and engine-generator
  • 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
  • Flywheel Housing, SAE No. 3
  • Flywheel, 126 teeth
  • SAE standard rotation
  • 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

  • Crankshaft Pulley - Crankshaft PTO Shaft, Engine Turning Device
  • Test Certificate at Rated PWR
  • 110V Anti-Condensation Heater
  • 230V Anti-Condensation Heater
  • Dry Elbow
  • Dry Flange
  • Dry Elbow and Bellows