Diamond Diesel Fuel Polishing

Preventative Maintenance - Marine

Diesel fuel can easily become contaminated with microorganisms such as bacteria, mold, fungi and algae.  Water in diesel will culture a microorganism or bacteria that feeds on the hydrocarbons in the fuel, therefore degrading the fuel. Water is the worst form of diesel contamination. Good fuel is clear and bright.  Fuel that has turned dark, almost black, is in a far advanced state of degradation. This darkening is accompanied by a form of contamination that clogs filters and causes poor combustion.

Diesel engines only use a small percentage of the fuel entering the system.  This allows warm diesel to return to the tank which encourages condensation and provides a ripe environment for microbial contamination.

Biocides may be added to the fuel to kill microbial activity, but this only causes solids and debris to settle to the bottom of the tank forming a thick sludge.

Fuel circulates and clogs filters causing a mechanical shut-down due to fuel starvation.

Continual filter changes address the symptom, but do nothing to correct the problem.

Contaminated fuel should be replaced with fresh fuel or polished to a clean dry state.

It is more cost effective and environmentally friendly to clean the fuel.

Symptoms of fuel problems:

  • Fuel over 1 year old
  • Loss of power or rpm’s
  • Excessive smoke
  • Transom soot
  • Clogged filters
  • Dark or hazy fuel
  • Particles or algae visible in the water separator bowl