Treat the air before combustion, not the exhaust after it.
Plasmoid X is a retrofit for yacht diesel engines, designed to cut fuel burn, emissions and soot by changing the air the engine breathes. It is in development, and we are looking for our first trial vessels.
- In development Final design under way
- For yacht diesel engines Retrofit or new build
- Trial vessels wanted Be one of the first
Exhaust after‑treatment wasn't built for yachts
SCR and diesel particulate filter systems are bulky, high-maintenance and prone to failure. They add weight, take up engine room space and give the crew another system to service at sea.
| Question | SCR and DPF | Plasmoid X |
|---|---|---|
| Where it works | On the exhaust, after combustion | On the intake air, before combustion |
| Fitting | Bulky units in the engine room | Connects to your existing exhaust runs |
| Upkeep | Filters to service, chemicals to dose | No filter media to clog. Only consumables to top up |
Plasmoid X works on the air before it reaches the engine.
Air in
Fresh air is drawn into the system instead of going straight into the turbo.
Ionizer
The air bubbles through water under UV light, which turns it into plasmoids. Filters keep the water out of the engine.
Vajra
The plasmoid air spirals through two linked stainless spheres around a sealed core.
Heat exchange
Hot exhaust spirals the other way through the outer chamber and warms the plasmoids through the wall.
Into the engine
The warmed plasmoids feed the turbo, where they are designed to give a more complete burn.
Exhaust out
The exhaust leaves through the outer chamber, cooler, and out of the boat.
What it is designed to do: burn less fuel for the same work, send cleaner exhaust out of the boat, and cut the soot that wears cylinders and internals.
Read the full technology
Built by a yacht engineer
Ricardo Negri spent 13 years as an engineer on sailing and motor yachts, looking after their engines day to day, before starting Plasmoid X to help marine engines run cleaner and last longer.
Plasmoid X oversees every installation, and any contractors we bring in are vetted to the same standard.
Meet the founderBe one of our first trial vessels
Refitting an existing vessel or planning a new build? Tell us about it and we'll reply directly. One price covers the full installation, and we stay available after the work is done.