Upgrade or replace your power source with this 1999 John Deere 6081 mechanical diesel engine, a proven 8.1‑liter six‑cylinder workhorse built for reliability and long‑term service. With only 900 operating hours, this engine provides excellent life expectancy and is ready to power marine, industrial, or generator applications right out of the box.
The John Deere 6081 is a turbocharged, aftercooled Powertech diesel that delivers strong torque and smooth operation across a wide RPM band, making it ideal for continuous‑duty use. It maintains proper oil pressure at idle and rated load, accepts standard 12 V or 24 V electrical systems, and was originally designed for commercial marine and industrial installations, so it pairs well with Prop governor, marine gear, or generator set setups.
This unit is currently running perfectly, with no known mechanical issues, and is available as‑removed for easy integration into your existing platform. Whether you’re rebuilding a boat, refurbishing a workboat, or upgrading a standby generator set, this 1999 John Deere 6081 offers John Deere quality and proven performance at a fraction of the cost of a new engine.
Product Specifications
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Year: 1999
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Manufacturer: John Deere
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Model: 6081 (8.1‑liter Powertech mechanical diesel)
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Engine Type: 6‑cylinder, turbocharged, aftercooled marine/industrial diesel
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Displacement: 8.1 L (496 cu in)
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Bore × Stroke: 116 mm × 129 mm (4.56 in × 5.06 in)
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Compression Ratio: 10:1
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Power Range: Typically 235–375 hp depending on rating (marine/industrial variants)
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Torque: Up to nearly 1,000 lb‑ft at peak, providing strong low‑ and mid‑range pulling power
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Lubrication System: Wet‑sump with standard oil‑filter configuration; 23 L (24 qt) capacity with filter change
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Oil Pressure: Rated ~310 kPa (45 psi) warm; idle ~207 kPa (30 psi)
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Electrical System: Compatible with 12 V or 24 V setups
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Condition: Used
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Usage: 900 hours
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Stock Number: 3577
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