Diemmax Marine

09/09/2026

They told us to cover it up, but this raw aluminum air intake was just too beautiful to hide. 🛠️

Think of it as the lungs of the Diemmax Marine V12.
Air goes in, horsepower (and a lot of feelings) comes out.

Tag a buddy who needs this kind of feelings in their boat!

28/08/2026

⚙️ Built to Perform, Machined in House. 🌊

Take a look at this setup on the Diemmax Marine 6 Series! We paired this high-performance engine with a custom-made exhaust system built precisely to handle the heavy-duty demands of the water.

Because standard brackets just don't cut it for custom builds, our team precision-engineered and machined the heavy-duty exhaust support entirely in-house. From raw metal to the final polish, we ensure every weld, curve, and mount delivers absolute reliability and maximum vibration damping.

Custom engineering means zero compromises on your vessel.

18/08/2026

Details that elevate the helm. 🛞

Here is a first look at the MTX electronic throttle, mounted and awaiting its software configuration.

Thanks to the NMEA2000 engine output, there is no need for cluttering the dash with analog gauges. All navigation and telemetry data will stream directly onto the onboard screens in real time. 📊💻

Sleek aesthetics meet peak technological performance.

10/08/2026

☀️ Zero summer shutdowns. We are OPEN every single day! 🌊

At Diemmax Marine, we know that summer is your busiest and most important time on the water. That is why our doors never close this season. We are here without interruption to support our amazing dealers and customers whenever you need us.

No summer breaks, no delays—just constant support to keep you moving. Reaching out is easy, and our team is ready to help! 🛠️⚓

30/07/2026

🚤 RE-POWER COMPLETE: Before & After the Diemmax Revolution! 🔄

Look at all that extra room in the engine bay! We just wrapped up a conversion, swapping out an old, bulky 280-300 HP cast-iron gasoline V8 for the all-new Diemmax 6 Series diesel engine. 🤯

A lot of boaters think switching to diesel means sacrificing space and adding heavy weight.
This project proves the exact opposite. When you stack this modern inline-6 up against a traditional old-school V8 block, the numbers don't lie:

Massive Space Gains 📏The inline-6 architecture of the Diemmax is only 725 mm wide. Classic gasoline V8s easily push past 800 mm. By narrowing the engine footprint, we unlocked valuable clearance on both sides of the bay, making future maintenance and bilge access incredibly easy.Shaving Off the Weight

⚖️The Diemmax 6 Series weighs a mere 280 kg (617 lbs) dry. The old cast-iron 300 hp V8 blocks routinely tip the scales between 410 and 440 kg. That means we just lightened the stern by more than 130 kg (285+ lbs)! The boat gets up on plane effortlessly now.

Slashing Fuel Consumption ⛽Older, large-displacement gasoline engines are notorious for burning fuel just to turn heavy internal parts.
By moving to modern diesel common-rail efficiency, this boat will cut its hourly fuel burn by 30% to 40% at cruise speed—massively extending its offshore range.Less weight, vastly lower fuel bills, zero range anxiety, and an engine room where you can actually breathe.

This is what a smart marine upgrade looks like.

🌊

22/07/2026

⚓ Beyond Performance: Engineering the Future of Marine Propulsion

At Diemmax Marine, we do not just build high-performance engines.

We pioneer integrated hybrid and hydraulic propulsion systems designed for the most demanding marine applications.

Pictured here is our Diemmax 6 Series engine, equipped with a specialized hydraulic pump for a high-performance sailing vessel.In competitive sailing and custom yacht builds, every single kilogram counts.
That is why we optimized this power unit to deliver maximum energy efficiency and responsiveness while keeping weight to an absolute minimum.

Why choose Diemmax hydraulic and hybrid solutions?
Weight Savings: Drastic reduction of overall onboard displacement.
Versatility: Seamless management of both propulsion and onboard systems.
Compact Footprint: Engineered specifically for tight machinery spaces.

Eco-Efficiency: Optimized fuel management to lower emissions.
Pure performance. Minimal weight. Diemmax technology.👉

Visit our website or DM us to discuss how we can power your next custom marine project.

09/07/2026

Proud to see Diemmax featured on Powertrain International! ⚓️

Our collaboration with MARIN (Maritime Research Institute Netherlands) for the FENDER USV project is a testament to what happens when you prioritize modular, scalable, and high-performance technology. By integrating the Diemmax 6-260 marine diesel and our proprietary autonomous control system, we are pushing the boundaries of what unmanned naval operations can achieve.

But this is just the beginning.

The momentum is accelerating fast:

✅ USV Projects: We are currently scaling multiple unmanned surface vessel initiatives, proving the efficiency of our "plug & play" architecture.
✅ Global Expansion: Our dealer network is expanding rapidly to meet the rising demand for reliable, high-tech propulsion solutions worldwide.

We don't settle for static. We are building the future of maritime autonomy.
Read more about the FENDER project here:
https://www.powertraininternationalweb.com/marine/diemmax-marine-fender/

For the propulsion of the FENDER prototypes, MARIN (Maritime Research Institute Netherlands) selected the DIEMMAX marine 6-260 — our inline-6 marine diesel

25/06/2026

Brainpower Behind the Horsepower. 🧠⚡
At Diemmax Marine, we don't just build world-class V12 and 6 engines—we build the intelligence that controls them.Meet the Vommax ECU, our 100% in-house engineered, custom-made engine control unit.

By developing our own hardware and software from scratch, we achieve total, seamless control over our propulsion systems.But we didn't stop at the engine. The Vommax ECU is fully optimized for Unmanned Surface Vessels (USV), delivering 100% autonomous vessel control.
From remote diagnostics to precision autonomous navigation, we bridge the gap between heavy marine muscle and next-generation smart autonomy.
Engineered in-house.

Built for the future of unmanned marine operations.

Discover our technology on the Diemmax website.

16/06/2026

Where art meets engineering. 🌊⚙️

Feast your eyes on the Diemmax V12—a true masterpiece born for the water, not just a marinized automotive engine. Crafted from billet aluminum, steel, and carbon fiber, this fully polished, CNC-machined beauty pumps out a massive 600 HP (Pleasure Duty) while weighing an astonishingly light 375 kg (Bobtail).

Built for ultimate durability, it features an incredible 5,000-hour Time Between Overhauls (TBO). Unmatched power-to-weight ratio, zero turbo-lag, and absolute precision.

Discover the ultimate marine propulsion on the Diemmax website.

09/06/2026

⚓️ DIEMMAX marine is live at Seawork! Come visit our team at Stand Q32 at ML Power Systems to talk marine propulsion and innovation. See you there! 🌊