John Deere Marine: 6068AFM85

6068AFM85
Marine Propulsion Engine
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6.8L PowerTech™
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172-246 kW (230-330 hp)
Features
High torque and low rated RPM
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High torque provides excellent vessel control and maneuverability. Lower rated propulsion RPM reduces vibration and noise for improved crew comfort.
4-valve cylinder head
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Excellent airflow through 4-valve cylinder head delivers greater low-speed torque and better transient response time.
High-pressure common-rail (HPCR)
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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
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Integrated components eliminate external hoses and fittings. Wet exhaust manifold creates a cooler and quieter environment for passengers and crew.
Replaceable cylinder liners
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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)
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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
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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
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Either-side oil fill/dipstick combinations and remote oil and fuel filter options are available for easier service access.
Specifications
Emissions Certifications
EPA Tier 3
IMO Tier 2
RCD 2
General Data (based on standard option configuration)
787 (1735)
644 (25.4)
Model
Number of cylinders
Displacement-- L (cu in)
Bore and Stroke-- mm (in)
Engine Type
Aspiration
Width Maximum - mm (in)
Length - mm (in)
Length to rear face of flywheel housing - mm (in)
6068AFM85
6
6 (6)
107 x 127 (4.21 x 5.00)
In-line, 4-cycle
1172 (46.1)
Turbocharged and air-to-coolant aftercooled
1489 (58.6)
862 (33.9)
Flywheel housing SAE
2
Height - mm (in)
Height, crankshaft centerline to top - mm (in)
935 (36.8)
Height, crankshaft centerline to bottom - mm (in)
Flywheel housing SAE
291 (11.5)
Engine Specifications
Performance Rating
M1
M2
Power KW (bhp)
Rated Speed (rpm)
Rated fuel consumption {L/hr(gal/hr)}
172 ( 230 )
2300
198 ( 266 )
2400
57.9 ( 15.3 )
M3
224 ( 300 )
2500
76.0 ( 20.1 )
M4
246 ( 330 )
2600
71.2 ( 18.8 )
M Rating
Unrestricted
88-92
>65%
0.8
16 of each 24 hr
M1 - Typical annual usage (hr)
Uninterrupted
M1 - Typical full-power operation (hr)
M1 - Typical load factor
000-5
M2 - Typical annual usage (hr)
<=65%
M2 - Typical full-power operation (hr)
M2 - Typical load factor
M3 - Typical annual usage (hr)
4 of each 12 hr
M3 - Typical full-power operation (hr)
M3 - Typical load factor
000-3
M4 - Typical annual usage (hr)
<=40%
M4 - Typical full-power operation (hr)
M4 - Typical load factor
000-4
<=50%
1 of each 12 hr
