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According to the top specialists, the most frequent source of premature engine failure in a marine application is the cooling system. This system is designed to effectively remove heat but marine growth such as barnacles and zebra mussels, or calcium are the leading cause of engine over heat and failure, especially on engines with flexible rubber impellers.

Barnacle Buster is a wonderful preventative maintenance measure for flushing your engine cooling system yearly. Barnacle Buster cleans the heat exchangers, hoses and piping of small to medium engine raw water-cooling systems, keeping your boat running in top shape and not spending days at the marina for repairs. Barnacle Buster can also be used in emergency situations when your engine overheats. It is a wonderful resource to keep onboard!

Your sea water cooling system works by circulating water to cool the heat exchangers and exhaust gasses exiting the engine. If this water flow becomes reduced due to residue buildup, you will begin to see steam or white smoke coming from the exhaust. It’s crucial that you monitor the engine temperature regularly, as this could be the first indication of a problem.

Barnacle Buster can be directly injected, and the cleaning process can include all parts of your marine engine cooling system. This includes not only the engine and heat exchanger, but all of the adjoining pipe and hose work. Once your injection and recovery points are located, you can begin with your flushing gear. Barnacle Buster works well with Trac Ecological’s Port-O-Flush Jr.

Once the marine engine cooling system flush is complete, the entire system should be rinsed with fresh water to ensure that all loose debris and leftover Barnacle Buster are completely removed. A complete flush should take 2 to 3 hours to complete, but the product can be recirculated for up to 6 hours if there is an excessive amount of buildup.

Trac Ecological is committed to providing the best products for your boat. To learn more about Barnacle Buster, or to find a list of dealers who sell our products, visit our website.


  1. Mark on November 10, 2019 at 5:54 am

    Hi is it possible to use barnacle buster to clean the cooling system in a outboard (Honda 130) thanks mark

    • Patrick Leclerc on December 11, 2019 at 2:10 pm

      Hi Mark,
      Our Barnacle Buster can and is often used to flush outboards with great results, so yes it can be used in outboards.

      Patrick Leclerc

  2. Nicholas Drew on October 5, 2020 at 2:26 pm

    I used Barnacle Buster on Cat C 18’s followed the video i have seen on U tube

    Worked great

    Well done Trac

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