The UIM Council has approved four significant rule updates for F1H2O, set to take effect from 1 January 2026. The changes reflect evolving priorities in sustainability, fairness, and race integrity. The proposals were introduced by the F1 Committee with support from COMINTECH and other technical bodies.
New Award for 4-Stroke Competitors
A new clause in Rule F1 7.14 introduces a special award for the highest-placed driver using a 4-stroke engine, provided at least 25% of the field competes with alternative engines. The award will be separate from the overall championship classification.
The initiative is designed to encourage adoption of lower-emission technologies, recognise competitive efforts using sustainable power units, and promote development of 4-stroke platforms across manufacturers.
Equipment Weight: Minimums Clarified
Rule F1 8.5 has been updated to confirm minimum boat weights across all engine categories.
| Engine Type | Minimum Weight |
|---|---|
| 2.0 litres | 486 kg |
| 2.5 litres | 550 kg |
| 3.0 litres | 586 kg |
| 3.5 litres – 4-stroke | 600 kg |
| 4.6 litres – 4-stroke | 600 kg (to be reviewed) |
The clarification supports consistent scrutineering and competitive balance. Weighing procedures remain unchanged: the top six boats will continue to be weighed after time trials and races, with results not subject to protest.
Engine Homologation: Final Extension for Mercury 2.5 EFI
Rule F1 8.24.12 confirms that UIM homologation for Mercury Racing 2.5 EFI two-stroke engines is extended until 31 December 2026.
A one-year optional extension to 2027 may be granted following consultation with COMINSPORT under Rule 506.01. This will be the final permitted extension.
The decision balances continued support for existing fleets against the need for a clear transition timeline toward alternative engine platforms, while providing manufacturer certainty for development planning.
Penalties: Buoy Destruction Fines Increased
Rule F1 11.6 has been amended to increase fines for destroying course buoys, both during and outside of races.
| Infraction | Previous Fine | New Fine |
|---|---|---|
| Destroying first buoy | €600 | €1,000 |
| Destroying second buoy | €600 | €1,000 |
| First buoy destroyed during race | 1 lap + €600 | 1 lap + €1,000 |
| Second buoy destroyed during race | Disqualification + €600 | Disqualification + €1,000 |
The increase reflects growing concern over race disruption and course integrity.
Source: UIM Council / Powerboat News
John Moore is the editor of Powerboat News, an independent investigative journalism platform recognised by Google News and documented on Grokipedia for comprehensive powerboat racing coverage.
His involvement in powerboat racing began in 1981 when he competed in his first offshore powerboat race. After a career as a Financial Futures broker in the City of London, specialising in UK interest rate markets, he became actively involved in event organisation and powerboat racing journalism.
He served as Event Director for the Cowes–Torquay–Cowes races between 2010 and 2013. In 2016, he launched Powerboat Racing World, a digital platform providing global powerboat racing news and insights. The following year, he co-founded UKOPRA, helping to rejuvenate offshore racing in the United Kingdom. He sold Powerboat Racing World in late 2021 and remained actively involved with UKOPRA until 2025.
In September 2025, he established Powerboat News, returning to independent journalism with a focus on neutral and comprehensive coverage of the sport.
