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Marine Diesel Engines

John Deere Marine Engines are at Home on the Water

Whether you're relaxing on your yacht or hard at work — worrying about your propulsion or generator engine is the last thing you want to do. That's why recreational and commercial boat owners have been relying on John Deere engines for more than 30 years. John Deere PowerTech™ 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.

When you can't see the shore, reliability takes on a whole new meaning. However, with more than 4,000 John Deere service locations worldwide, you're never far from help when you need it. John Deere marine engines serve the unique needs of marine applications and share the same reputation for quality and performance that their agricultural and industrial counterparts have enjoyed for decades. When you choose John Deere, you get the support of one of the strongest engine and equipment companies in the world.

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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


Imge 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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    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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