By Rennie Sterle, EFYC Power Boat Captain
We’ve all seen enough “unprecedented” weather events lately to realise that climate change might not just be coming—it’s here. In fact, many of these events are no longer unprecedented at all.
Reducing emissions is a hot topic, but in the world of boating, finding viable options is tricky. And yes, I can already hear the centreboard and keelboat members shouting their eco-credentials from across the marina—point taken, sailors.
But what about powerboats and other fuel-driven vessels? Recently, I partnered with a transport business to trial a new hydrogen injection technology designed to reduce diesel emissions—and the results were too promising not to share.
The Trial: Hydrogen from Water
The system uses hydrogen generated from distilled water via membrane separation technology. The hydrogen is injected into the engine to enhance the burn process, reducing emissions and improving efficiency.
The trial involved fitting a compact unit (about the size of a small esky) to two trucks:
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🚛 2002 Scania 141 – operating in the Perth metro area, 70t rated road train
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🚚 2007 Columbia Freightliner – regular 90t road train on the Perth–Pilbara route
The unit was filled with 15L of distilled water and wired into the vehicle’s battery system. An extra 20L bottle was provided for top-ups during the trip.
Expected Benefits (According to the Manufacturer)
The unit was said to:
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Reduce particulate matter and NOx emissions
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Lower fuel consumption
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Improve engine, oil, and exhaust system life
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Replace the need for AdBlue® (Diesel Exhaust Fluid)
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Increase torque and overall performance
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Operate using a proprietary electronic control module
What We Found
The system worked—and better than expected:
✅ Emissions dropped from 28% to just 3%
✅ Fuel consumption decreased
✅ Torque increased
✅ Engine cleanliness improved, as seen during servicing
We ran this trial over six months, and the Freightliner in particular showed significant gains due to its longer and harder workload.
There were no negative impacts on the engines or components, and minimal maintenance was needed—just checking water levels and topping up as required.
Is It Worth It?
At the time, each unit cost around $15,000. Developed in Australia (WA & SA), multiple manufacturers are now offering similar systems. On a commercial transport level, the investment pays for itself in 2–3 years, with a 10-year shelf life.
What About Boats?
According to the manufacturer, this system can be used on any engine, including petrol and marine engines. So yes, it can be fitted to a boat.
But is it cost-effective for recreational vessels? Probably not. Most private boats don’t clock up the engine hours or distances needed to make the investment worthwhile—especially for larger boats with twin engines.
However, if your goals include:
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Reducing emissions from the outset
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Improving engine performance
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Saving on fuel
…then this system will deliver on all fronts.
Why It Matters
We need to be having these conversations and exploring new technology. Even if it’s not a perfect fit right now, it’s a step in the right direction for responsible boating and environmental awareness.
If you’re curious about the system or want to chat more about sustainable boating options, I’m always happy to talk.
Stay safe—and greener—on the water.
– Rennie Sterle
EFYC Power Boat Captain