Specialists in Marine Diesel Polishing

*Free analysis provided for Portsmouth, Chichester, Southampton, Lymington. Please ring for details. A small charge may apply outside these areas

FREE* Diesel Analysis

We will come to you and analyse your fuel & tank without any obligation 

What ClearlyNo1 can do for you?

80% of marine diesel engine breakdowns are caused by contaminated diesel or diesel bug. ClearlyNo1 are specialists in marine Diesel Polishing and, Diesel Bug Removal and Diesel Tank Cleaning in Portsmouth, Hampshire. Unlike most marine fuel polishers our professional industrial filtration equipment cleans your diesel to a much higher standard than the diesel supplied by marinas and other fuel suppliers. We also clean and remove all of the water and contaminants from your tank and fuel.

We operate throughout the South Coast including; Portsmouth, Southsea, Isle of Wight,

Gosport, Chichester, Hayling Island, Southampton, Hamble, Swanwick, Lymington, 

Poole, Brighton. West Sussex, East Sussex, Dorset, Hampshire.


ClearlyNo1 is fully mobile and we bring all our services to your boat including:


  • Diesel Fuel & Engine Oil Analysis

  • Fuel Tank Water & Sediment Removal

  • Elimination of Diesel Bug

  • Diesel Polishing to 1 micron & 100ppm

  • Diesel Conditioning & Stabilisation

  • Preventative Maintenance

  • Ongoing Maintenance Contracts

  • Diesel Fuel Additives

  • Insurance approved Inspection Hatches Supplied and Fitted

  • Marine, Agriculture, Plant & Industrial Diesel Polishing & Tank Cleaning Service

Symptoms of contaminated diesel

Prevention is always better than cure but water ingression is almost unavoidable in marine craft. If you have any doubt about the state of your diesel please contact ClearlyNo1. Some of the symptoms you may experience if you have contaminated diesel :


  • Difficulty starting engines

  • Poor engine performance

  • Fuel related warning alarms

  • Clogged fuel filters

  • Black/brown sludge

  • Clogged fuel injectors, pump or fuel lines

  • Cloudy diesel

  • Bad smelling diesel or exhaust

  • Excess engine wear

  • Engine failure due to water or contamination entering the engine

For up to date information & Photos Click Here
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Call us today on 07512 078554

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© 2018 ClearlyNo1 Diesel Solutions

Marine Fuel Polishing & Tank Cleaning

Here at The Clean Diesel Company we offer Fuel Polishing and Tank Cleaning Services for your Boat, helping to ensure your fuel is Diesel bug, Water and Contamination Free!