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post #21 of 24 Old 10-01-2019
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Re: Diesel Fuel Treatment: Multiple Questions

If it helps, my Yanmar JH series operation manual, under Additional Technical Fuel Requirements, states, "Do not use biocide".
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Re: Diesel Fuel Treatment: Multiple Questions

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If it helps, my Yanmar JH series operation manual, under Additional Technical Fuel Requirements, states, "Do not use biocide".
If that is one of their CR Diesels, perhaps they have additional filtering requirements and the very close tolerances have some difficulty with the chemicals in a biocide. Maybe. Perhaps.
OTOH.... I have not heard of such a demand..... so, it's a puzzle.

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post #23 of 24 Old 10-01-2019
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Re: Diesel Fuel Treatment: Multiple Questions

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If it helps, my Yanmar JH series operation manual, under Additional Technical Fuel Requirements, states, "Do not use biocide".
It is an interesting statement. Several thoughts:

* Biobor, to my understanding, is used in most jet fuel. That's a rather critical use.

* Not all biocides are the same. Some (not Biobor JF) will crystallize and fall out if not mixed well. It seems odd to paint them all with one brush.

* If you use a biocide AFTER you have an infection, you will get dead bugs and clogging, and some of that will be on the other side of the filter, where it can damamge injectors.

You MUST use a biocide as a preventative, not as a treatment for existing disease.

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post #24 of 24 Old 10-01-2019
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Re: Diesel Fuel Treatment: Multiple Questions

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Originally Posted by JoeDunn View Post
If it helps, my Yanmar JH series operation manual, under Additional Technical Fuel Requirements, states, "Do not use biocide".
It is on page 35. https://www.yanmar.com/media/global/...JHM-M00201.pdf

I worry about the butyl cellosolve in the FPPF Marine Diesel Fuel Treatment that I added to my diesel fuel tank before I had an o-ring failure. Dow Chemical says "Do not use Viton, neoprene, nitrile or natural rubber gaskets or seals." http://msdssearch.dow.com/PublishedL...romPage=GetDoc on page 4.

Of course, medicine or poison, it is all in the dose.

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Last edited by wsmurdoch; 10-01-2019 at 05:39 PM.
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