The UIM has homologated four Mercury Racing engines for offshore international racing, opening them up across multiple classes from Offshore 2 through to the APBA Superstock category.
The approvals were announced by the UIM and cover engines at different power levels, each assigned a homologation number and cleared for specific class eligibility in line with the power and cubic capacity limits set out in Offshore Article 730.1.
The Approved Engines
The Mercury Racing 200R, carrying Homologation No.549, is approved for UIM Offshore 3 classes. The Mercury Racing 200 ROS, Homologation No.545, is likewise cleared for UIM Offshore 3 classes.
The Mercury Racing 300 ROS, Homologation No.547, has the broadest approval of the four. It is cleared for UIM Offshore 3 classes, the V2 class, and the APBA Superstock class.
The Mercury Racing 500R, Homologation No.548, is approved for the UIM Offshore 2 class.
Homologation files for all four engines can be accessed and downloaded via the UIM website under Competitions / Homologated Engines: uim.sport/Engine.aspx
Class Eligibility Summary
| Engine | Homologation No. | Approved Classes |
|---|---|---|
| Mercury Racing 200R | 549 | UIM Offshore 3 |
| Mercury Racing 200 ROS | 545 | UIM Offshore 3 |
| Mercury Racing 300 ROS | 547 | UIM Offshore 3, V2, APBA Superstock |
| Mercury Racing 500R | 548 | UIM Offshore 2 |
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.
