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John Deere 6090SFM85 Constant-Speed Auxiliary & Generator Engine

Model Photo


  • 9.0L PowerTechâ„¢
  • 222-278 kW (297-373 hp)



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 controls fuel injection timing and provides precise control for the start, duration, and end of injection.

Water-cooled exhaust manifold

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

Turbocharged with air-to-seawater aftercooling

  • Cooler turbocharger operation enables higher ratings and efficiencies for applications that require high power or speed.

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.

Heat exchanger

  • High-capacity heat exchanger provides reliable operation in adverse conditions.

Multiple service options

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

Emissions Certifications

IMO Tier 2  
EPA Tier 3  

General Data (based on standard option configuration)

Model 6090SFM85
Number of cylinders 6
Displacement-- L (cu in) 9.0 (549)
Bore and Stroke-- mm (in) 118.4 x 136 (4.66 x 5.35)
Engine Type In-line, 4-cycle
Aspiration Air-to-sea water
Length - mm (in) 1685 (66.3)
Length to rear face of flywheel housing - mm (in) 1415 (55.7)
Width Maximum - mm (in) 953 (37.5)
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) 1056 (2328)

Calculated Generator-set Rating - 1800 RPM

Rated Speed Hz (rpm) 60 ( 1800 )
Generator efficiency % 88-92
Engine Power Prime kW (hp) 278 (372.8)
Power factor 0.8
Calculated generator set rating prime - kWe\ 245-256
Calculated generator set rating prime - kVA 306-320

Calculated Generator-set Rating - 1500 RPM

Rated Speed Hz (rpm) 50 ( 1500 )
Generator efficiency % 88-92
Engine Power Prime kW (hp) 222 (297.7)
Power factor 0.8
Calculated generator set rating prime - kWe 195-204
Calculated generator set rating prime - kVA 244-255