6068AFM85Marine Propulsion Engine

6.8L PowerTech™
172-246 kW (230-330 hp)

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Marine Selection Guide

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6068AFM85

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Features

Features

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High torque and low rated RPM

High torque provides excellent vessel control and maneuverability. Lower rated propulsion RPM reduces vibration and noise for improved crew comfort.

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.

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Specifications

Specifications

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Specifications

John Deere

6068AFM85

Marine Propulsion Engine

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Emissions Certifications

IMO Tier 2
EPA Tier 3
RCD 2

General Data (based on standard option configuration)

Model	6068AFM85
Number of cylinders	6
Displacement--L(cu in)	6 (6)
Bore and Stroke-- mm (in)	107 x 127 (4.21 x 5.00)
Engine Type	In-line, 4- Cycle
Aspiration	Turbocharged and air-to-coolant aftercooled
Length - mm (in)	1489 (58.6)
Length to rear face of flywheel housing - mm (in)	1172 (46.1)
Width Maximum - mm (in)	862 (33.9)
Flywheel housing SAE	2
Height - mm (in)	935 (36.8)
Height, crankshaft centerline to top - mm (in)	644 (25.4)
Height, crankshaft centerline to bottom - mm (in)	291 (11.5)
Weight, dry - kg (lb)	787 (1735)

Engine Specifications

Performance Rating	Power KW (bhp) Rated Speed (rpm) Rated fuel consumption L/hr(gal/hr)
M1	172 ( 230 ) 2300
M2	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

M1 - Typical annual usage (hr)	Unrestricted
M1 - Typical full-power operation (hr)	Uninterrupted
M1 - Typical load factor	>65%
M2 - Typical annual usage (hr)	000-5
M2 - Typical full-power operation (hr)	16 of each 24 hr
M2 - Typical load factor	<=65%
M3 - Typical annual usage (hr)	000-4
M3 - Typical full-power operation (hr)	4 of each 12 hr
M3 - Typical load factor	<=50%
M4 - Typical annual usage (hr)	000-3
M4 - Typical full-power operation (hr)	1 of each 12 hr
M4 - Typical load factor	<=40%

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