Outboard engines
Updated 12 March 2020
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This publication is available at https://www.gov.uk/government/publications/engine-power-monitoring-and-testing/outboard-engines
Only the engine manufacturer’s specified power output will be considered when applying for fishing vessel registry and fishing licences with the Registry of Shipping and Seamen and UK fisheries administrations.
Multiple outboard engines will be recorded as the combined engine power of the vessel.
You have been allowed to register and licence your vessel with a de-rated outboard engine if you can provide satisfactory evidence of having bought and de-rated the engine before the changes to outboard engine power declaration for fishing vessel registration and licensing in October 2011. You must provide details of the methodology used to de-rate the engine as performed and certified by the manufacturer.
A throttle stop is not considered as a suitable method to de-rate an engine, and the power will be considered to be that of the engine itself.
In all other cases, you cannot apply to register and license a vessel equipped with an outboard engine less than the manufacturer’s specified power.