Established in 2004, Seapower Marine has been working in the marine industry undertaking service work and offering technical support to commercial and recreational vessel owners.

In 2007 we became a Cummins Aftermarket Dealer and over the years we have built up a wealth of knowledge and experience of working with Cummins products; today we still continue to dedicate our business to the Cummins brand. Significant investments have been made into whole goods, such as engine and generator stocks as well as extensive stock holdings of parts, technical equipment and plant.

In 2018, Seapower Marine became the main Cummins UK MSD (Marine Specialist Dealer) for new engines and generators. This includes sales and support on HMLD (High, Medium and Low Duty) engines and the complete Onan range.

Our Aftermarket Parts and Service dealership area covers Norfolk, Suffolk, Essex and down to St Katherine’s Dock. However, with our MSD dealership we are able to offer Cummins support on engines and the complete Onan range outside of these areas, including overseas.

All of our staff are trained by Cummins UK, enabling them to assist you with  identification of service parts, technical advice, manage warranty issues, including helping you diagnose more serious operational issues. We have Cummins test generators and engines onsite, enabling us to assist with diagnostic issues and/or replicate faults.We also offer workshop training as well as onboard vessels for Captains, Owners and Crew.

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Our Services

  • Cummins Engine and Generator Supply

  • Cummins Engine and Generator Commissioning

  • Cummins Engine and Generator Servicing and Service Packages

  • Diagnostic Testing
  • Warranty

  • Engine and Generators Surveys
  • 
Upfits, Modifications, Repairs and Re-builds
  • Support Vessel and Yacht Charter Services

  • Commercial Fleet Support
  • Captain’s Briefings

  • Engineering Service training for Owners and Crew

Engine Packages

  • Cummins Engines up to 15L

  • Joint Project support for High Horsepower with Cummins
  • Recon Engines
  • Gearbox and Couplings

  • Installation Reviews, Commissioning & Sea Trials


Generator Packages

  • Cummins Onan Generator 4kW – 150kW
  • Installation Reviews and Commissioning

Spare Parts

We hold extensive stocks of service parts, accessories and consumables, all supported by technical advice when required:

  • 
Cummins Engines from B4.5 to High Horsepower QSK Range
  • 
Cummins Onan MDK & MDD Generator range

  • Fleetguard Filters & Fluids and Onan Filters

  • Halyard Exhaust, Silencers, Insulation Material & Wavestream Filters

Technical Knowledge

Our staff undergo regular OEM training and certification, including the latest advances in marine engines, diagnostics and repair. A comprehensive technical library is available on our website.