/ Marine Diesel Engines

Marine Diesel Engines

Leave your worries behind with the power and reliability of John Deere engines

With expanded power from 56 to 559 kW (75 to 750 hp), John Deere PowerTech™ engines can take you wherever you want to go. Cruise with the confidence and satisfaction only John Deere propulsion, auxiliary, and generator drive engines can deliver. With high torque and low rated RPM, you also get excellent vessel control and reliable auxiliary drives.

Recreational and commercial boat owners have been relying on John Deere engines for more than 30 years. John Deere marine engines are powerful, reliable, quiet, and fuel efficient. And they are backed by our vast service and support network that can keep you operating — no matter where you go.

Marine Tier 3 Engines

Our U.S. EPA Tier 3 marine engines* are quiet and fuel efficient, making long work days seem a little shorter or your relaxation time on the water last a little longer.

    Learn More About Our Tier 3 EnginesLearn More About Our Tier 3 Engines
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    Which Vessel Is Right For You?

    Find the propulsion engine that best meets your needs with our Marine Product Selector.

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    Hull Types

    Boats perform in the water based on the physical shape of the hull, and how it sits in the water. The two general types of hulls are displacement and planing. Other types of hull construction combine features of the displacement and planing hulls and are called semi-displacement or semi-planing.

    Displacement Hull

    Displacement hulls push through the water as they have no hydrodynamic lift, or the boat does not rise out of the water as speed increases. The maximum speed of these hulls is typically between 1 and 1.5 times the square root of the boat length based on hull design. Some general characteristics of a displacement hull are:

    • Rugged construction
    • Easy to propel through the water at low speeds
    • Large interior spaces

    Image of displacement hull

    Planing Hull

    Planing hulls are designed to run on top of the water at high speeds. To achieve this they typically have a very flat stern. The hull design (shape) does not limit the maximum attainable speed but does affect the power required for it to get on plane (on top of the water). Some general characteristics of a planing hull are:

    • At high speeds in rough water, the vessel will have a jarring ride as it pounds into waves and swells
    • At high speeds, has a tendency to slide sideways in a turn
    • Tends to roll at rest
    • Inefficient at low speeds (takes more power to push through the water)

    Image of planing hull

    Combination Hull

    Semi-displacement or semi-planing hulls have features of both planing and displacement hulls. They have a maximum hull design speed. Exceeding this speed can result in erratic handling and unstable operation. There is not one hull design characteristic that differentiates semi-displacement from semi-planing hull. The greater the hydrodynamic lift and higher the hull design speed the more likely it will be referred to as a semi-planing hull. Some general characteristics of a semi-planing/displacement hull are:

    • Has a pronounced chine (angular break where the bottom joins the hull sides) forward
    • Has versatility of combining speed with sea-worthiness
    • Offers a degree of useable interior spaces

    Image of semi-displacement or semi-planing hulls

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    Customer Profiles

    Boat owners and captains around the world rely on John Deere engines — several of our customers share insight into what aspects of our engines they value. Their vessels span a variety of types, from small yachts to deep blue workboats.

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      Follow the link to learn more about repowering your vessel.

      Repowering Your Vessel

      John Deere Power Systems offers several options and items to consider before repowering your vessel with a marine diesel engine.

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        Marine Tier 3 Engines

        Marine Tier 3 Engine

        John Deere Power Systems is pleased to announce new Marine Tier 3 PowerTech 4.5L and 6.8L propulsion and generator-drive engines.

        Learn more about our Tier 3 engines