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DMT25AL - DONG-I

56–75 kW (75–101 HP) The gearbox is available with the following reduction ratios: 1.64, 2.07, 2.52, 2.96, 3.32 Optional trolling valve and electric shift solenoid.

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We have successfully replaced gearboxes from major brands, and the result is the same quality and robustness, but at a lower price

DMT25AL - MARINE GEARBOX

Discover the complete Dong-I gearbox lineup and find detailed information about all models, specifications, and options. Our brochure provides everything you need to know to choose the right gearbox for your engine and vessel, including reduction ratios, coupling options, and additional features. For assistance or guidance in selecting the perfect gearbox, contact us directly, and our specialists will help you find the solution that fits your needs perfectly.

SEE SPECIFICATION HERE

Dong-I Gear: 413–565 kW (553–758 HP)

This gearbox is designed for engines producing 413–565 kW (553–758 HP) and offers reduction ratios of 3.53, 4.08, 4.52, and 5.04. It comes standard with a rubber block coupling, and options are available for a flexible coupling, electronic shift valve, and trolling valve, providing maximum flexibility for different marine applications.

Selecting the right gearbox can sometimes be challenging, as each installation depends on the engine, propeller system, and vessel configuration. We therefore recommend contacting us directly, so we can work together to ensure you get the optimal gearbox solution for your setup, guaranteeing the best performance, reliability, and longevity.

 

Marine Gear Replacement – Switch to Dong-I

In most cases, it is entirely possible to replace your existing marine gearbox with a Dong-I gear. While some installations may require adapter kits, flexible couplings, or other modifications, in the vast majority of cases, it can be done smoothly.

We have successfully replaced gearboxes such as ZF, Twin Disc, PRM, Mekanord, and many others with Dong-I. The result is the same quality and robustness as the major brands, often at a lower cost, without compromising reliability or performance.

Just as Reliable as the Leading Brands

Many people wonder if Dong-I gears can match the most recognized marine gearbox brands. The answer is absolutely yes!

Dong-I gearboxes are manufactured in Korea, have been produced for many years, and have proven their reliability in countless commercial and private marine applications. We have never experienced issues with these gearboxes — they perform flawlessly.

With a Dong-I gearbox, you get the same quality and durability as the leading brands, often with additional advantages that make it a smart choice.

Compatible Engines

Dong-I gearboxes are designed for medium- and high-speed marine engines and can be adapted to a wide range of brands, including:

Volvo Penta, Yanmar, John Deere, Scania, Mitsubishi, Cummins, Iveco, Perkins …and many more.

They can be used just like ZF or Twin Disc gearboxes, but often offer lower cost and higher flexibility.

We can also assist in mapping the gearbox to your engine, ensuring a perfect fit and a smooth, trouble-free installation.

 

West Diesel – Your Marine Gear Specialists

At West Diesel, we are true specialists in marine gearboxes and we know exactly which gearbox you need for your engine and vessel. We take care of all the calculations to ensure you get a solution that is highly reliable, extremely durable, and vibration-free. Our expertise guarantees that the gearbox fits perfectly with your engine, propeller system, and vessel, providing the longest possible service life and optimal performance.

The Advantages of Dong-I Gear

Dong-I gearboxes offer a range of significant advantages compared to other marine gear brands. Example:

  • Forward and reverse capabilities (FWD & REV) — many marine gearboxes cannot provide both efficiently.
  • Flexible installation options with adapter kits and bell housings
  • Lower cost without compromising quality
  • High reliability and durability, Smooth and vibration-free operation and more

With Dong-I, you get a robust, proven gearbox that meets the demands of medium- and high-speed marine engines while delivering performance and convenience.

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Want to find the perfect Dong-I gearbox for your engine and vessel? Our specialists at West Diesel are here to help. Whether you need guidance on selecting the right model, compatibility with your engine, or details on installation, we provide expert support every step of the way.

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Contact

Rasmus Sørensen

COO

[email protected]
+45 76 11 41 62

Erling Sørensen

CEO

[email protected]
+45 76 11 41 61

About West Diesel

West Diesel specializes in providing complete power solutions tailored to your unique requirements, focusing on high quality and flexible configuration. Our customer-centric products offer you excellent value and reliability.

Contact

H E Bluhmes Vej 6
6700 Esbjerg
Denmark


Tel.: (+45) 75 12 70 44
Email: [email protected]

CVR: 76393710

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