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Old 30-12-2009, 20:59   #1
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Yanmar and Biocide

So is anyone using Biocide in their Yanmar engine?
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Old 30-12-2009, 21:59   #2
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The biggest problem with this stuff is "operator error"

when it says x ounces for y gallons....that's it.

more is NOT better!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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Old 31-12-2009, 05:02   #3
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Yes. Religiously! Never had a fuel problem with our 4JH3BE, and we bought diesel from some very iffy locations in the eastern Caribbean.

I used the Yanmar-recommended FPPF Killem biocide. I also used FPPF Cetane enhancer. No filter clogs and no black smoke on the transom. As the Chief says, follow the label directions.
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Old 31-12-2009, 05:59   #4
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Quote:
Originally Posted by Chief Engineer View Post
The biggest problem with this stuff is "operator error"

when it says x ounces for y gallons....that's it.

more is NOT better!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
At the same time as a chemical treater: less is worthless! These are non-oxidizing biocides that have to be a minimum dose level to be effective. If you don't get to the level all you are doing is giving the bugs a chance to adapt to and become resitant to the biocide. If in doubt to your fuel capacity, or if you have a biological problem now, add a little higher dose just don't go too crazy.
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Old 31-12-2009, 06:11   #5
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Just started using Startron. Those that use it swear by it. Never use to use anything but my fuel line got plugged with black goop last year while crossing the Gulf Stream.
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Old 31-12-2009, 06:33   #6
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I have not needed it in the Med,
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Old 31-12-2009, 07:38   #7
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FPFF Killem

Quote:
Originally Posted by Hud3 View Post
Yes. Religiously! Never had a fuel problem with our 4JH3BE, and we bought diesel from some very iffy locations in the eastern Caribbean.

I used the Yanmar-recommended FPPF Killem biocide. I also used FPPF Cetane enhancer. No filter clogs and no black smoke on the transom. As the Chief says, follow the label directions.
Since the Yanmar Operator's manual cautions against any biocide use, I was concerned that my warranty could be affected. However, my inquiry to Yanmar Corp. was forwarded to the Northeast region distributor (Mack Boring), who advised that FPPF Killem is the only approved biocide for Yanmar diesels. I took this as an official endorsment and have used Killem since with no ill effects.

Killem is not easy to find--you may have to mail order it. But if used as directed, one quart should be enough for your lifetime!
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Old 31-12-2009, 07:43   #8
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I just installed a new Yanmar and that is still the instructions. Don't use anything but if you just have to use Killem.

Jim
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Old 31-12-2009, 07:53   #9
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... Killem is not easy to find--you may have to mail order it. But if used as directed, one quart should be enough for your lifetime!
A 16 oz. Bottle of “FPPF Killem” biocide treats 1,920 Gallons of fuel.

http://www.fppf.com/msds/msds_Killem.pdf

On another allied topic ➥ Magnetic water treatment pseudoscience
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Old 31-12-2009, 07:56   #10
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Been using Bio-Bor since new. Following directions I have only used 1/2 of a bottle in 750 engine hours. I had been told that if you use too much BIO-BOR it turns to jelly in the bottom of the tank. I also started using STARTRON a while back to clean injectors. I don't know if it works but it doesn't cost much and has no limited use recomendations. Fuel is sparkling clean. I change filters every 100 hours max and they are as clean as new when I change them. Yanmar 3GM30F.
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Old 31-12-2009, 07:59   #11
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PS: I always keep the fuel tank full to limit condensation.
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Old 31-12-2009, 08:36   #12
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Originally Posted by Hud3 View Post
I used the Yanmar-recommended FPPF Killem biocide. I also used FPPF Cetane enhancer. No filter clogs and no black smoke on the transom. As the Chief says, follow the label directions.
I use the exact same procedure per Larry Berlin at Mack Boring.
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Old 12-09-2010, 00:34   #13
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Just to bump this thread, amazon is now carrying (or distributing?) the FPPF Killem stuff:

Amazon.com: 16 Oz. Bottle Killem FPPF Fuel Bacteria Slime Killer: Automotive
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Old 12-09-2010, 07:13   #14
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I see someone touched on the full fuel tank to prevent condensation myth. This one has been around for a long time. The physics of this myth do not compute. The guy on this link covers it very well.
The Myth of Condensation in Fuel Tanks by David Pascoe: Boat Maintenance, Repairs and Troubleshooting
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Old 12-09-2010, 07:20   #15
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Diesel (more than gasoline) has entrained water in it....So, I use biocide.
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