6068AFM85 Marine Generator Drive Engine

6068AFM85 Marine Generator Drive Engine


  • 6.8L PowerTech™
  • 139-166 kW (186-223 hp)
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Optional low rpm operation

  • A lower speed option provides the user the ability to start the engine without going to the gen-set rated speed and allows the user to clutch in an accessory that may be driven by the engine.

4-valve cylinder head

  • Excellent airflow through 4-valve cylinder head delivers greater low-speed torque and better transient response time.

High pressure common-rail (HPCR)

  • The HPCR fuel system provides variable common-rail pressure, multiple injections, and higher injection pressures. It also controls fuel injection timing and provides precise control for the start, duration, and end of injection. Electronic transfer pump is self-priming for ease of maintenance. Provides high performance, excellent fuel economy, and low emissions.

Water-cooled exhaust manifold

  • Integrated components eliminate external hoses and fittings. Wet exhaust manifold creates a cooler and quieter environment for passengers and crew.

Replaceable cylinder liners

  • Replaceable wet-type cylinder liners are precision-machined and hardened for long life. Allows engine to be rebuilt to original specifications.

Electronic engine control unit (ECU)

  • Advanced fault code diagnostics and customizable engine protections ensure reliability and uptime. Provides highly customizable features and trim to integrate your vessel.

Keel-cooled or heat exchanger

  • Closed cooling system in keel-cooled engine option eliminates the need for a sea strainer, seawater pump, or anodes. Heat exchanger option offers a lighter, more compact, and simpler engine installation.

Multiple service options

  • Either-side oil fill/dipstick combinations and remote oil and fuel filter options are available for easier service access.



EPA Commercial Marine Tier 3
IMO MARPOL Annex VI Compliant

General Data (based on standard option configuration)

Model 6068AFM85
Number of cylinders 6
Displacement-- L (cu in) 9.0 (549)
Bore and Stroke-- mm (in) 118 x 136 (4.65 x 5.35)
Engine Type In-line, 4-cycle
Aspiration Turbocharged and air-to-coolant aftercooled
Length - mm (in) 1685 (66.3)
Width Maximum - mm (in) 1027 (40.4)
Length to rear face of flywheel housing - mm (in) 1415 (55.7)
Flywheel housing SAE 2
Height - mm (in) 983 (38.7)
Height, crankshaft centerline to top - mm (in) 664 (26.1)
Height, crankshaft centerline to bottom - mm (in) 319 (12.6)
Weight, dry - kg (lb) 1055 (2326)

Classification Societies


Calculated Generator-set Rating - 1800 RPM

Rated Speed Hz (rpm) 60 ( 1800 )
Generator efficiency % 88-92
Engine Power Prime kW (hp) 166 (222.6)
Power factor 0.8
Calculated generator set rating prime - kWe 146-153
Calculated generator set rating prime - kVA 183-191

Calculated Generator-set Rating - 1500 RPM

Rated Speed Hz (rpm) 50 ( 1500 )
Generator efficiency % 88-92
Engine Power Prime kW (hp) 139 (186.4)
Power factor 0.8
Calculated generator set rating prime - kWe 122-129
Calculated generator set rating prime - kVA 153-161