Kent, United Kingdom
H2GO Marine is building a cleaner future for recreational boating — converting petrol outboard engines to run on hydrogen. We're currently raising funds to build our proof of concept. Follow the journey.
The Technology
A standard 4-stroke petrol outboard is an excellent candidate for hydrogen conversion. The combustion process is identical — only the fuel delivery system changes. No new engine. No electric motor. Just hydrogen.
01
Compact composite cylinders replace the petrol fuel system. Lightweight, rated to 300 bar, and safe to transport.
02
A precision regulator drops cylinder pressure to the engine's operating range. Flashback arrestors and a solenoid shutoff keep everything safe.
03
The carburettor is rejetted for hydrogen's different stoichiometry. The engine block, head, cooling system and gearbox remain completely original.
04
Combustion produces water vapour. No CO₂, no particulates, no smell. Just steam — and the sound of your engine running normally.
Coming Soon
Once our proof of concept is complete and proven, H2GO Marine will offer a full range of conversion services for recreational marine engines.
Professional hydrogen conversion for 4-stroke outboard engines. Mobile fitting service — we come to your marina.
Full hydrogen conversion for inboard petrol engines including single and twin engine setups up to 300hp.
Fill your hydrogen cylinders overnight at home from a standard mains socket. No forecourt needed.
The Roadmap
We're being transparent about every stage of this build — the funding, the engineering, the failures and the wins. All of it documented on YouTube.
Phase
Now
We've designed the system, sourced our conversion methodology, and registered H2GO Marine. Now we're raising the £500 needed to buy a donor engine and build the world's first hydrogen outboard conversion.
Phase
Next
Source a donor 4-stroke outboard, convert it to run on hydrogen, and document every step on YouTube. First start on hydrogen will be our hero moment.
Phase
3 months
Begin offering outboard conversion fitting services to boat owners across Kent, Hampshire and Devon.
Phase
Year 1
Scale to larger inboard engines and launch the H2GO home fill station product.
Phase
Future
Long-term: vessels that take on seawater, convert it to hydrogen via onboard electrolysis, and emit only clean water vapour. Effectively unlimited range, zero fuel cost at sea.
Follow the Build
Every step of the H2GO Marine journey is documented on YouTube — the engineering, the setbacks, and the breakthroughs. Subscribe so you don't miss the first start on hydrogen.
Subscribe to follow the world's first petrol outboard to hydrogen conversion — from first bolt to first start.
Every contribution goes directly toward parts, equipment, and the donor engine for our proof of concept. No salaries, no overheads — just building.
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