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Old 12-21-2018, 03:44 PM   #81
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A significant factor in how you manage large volumes of fuel and the potential for contamination is the number of tanks you have to work with. If you have a day tank, and other bulk tanks you can take on a bad load and clean it up with a polishing system before it makes it to the day tank. Not fun, but not a major problem. If you don't have a day tank, then if you take on a bad load of fuel you can't rely easily on excess fuel return to clean it up for you so you need a polishing system, nor can you avoid having to clean it with polishing before you have to use it unless you do so at the dock from where you got the contaminated fuel.

As long as you're confident of fuel quality, then letting fuel bypass keep the fuel clean can work. If you can't be confident, then a polishing system can save a lot of headaches.

A good practice is to fill a clear gallon jug before you start fueling if you have any questions about quality. Let it sit for 10 minutes and take a look so you know what you'll be dealing with.
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Old 12-22-2018, 04:30 PM   #82
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Originally Posted by Delfin View Post
Problem is matching the pump to the filter capacity. A Racor 1000 will only pass a bit less than 3 LPM. But if you have filters that can handle that volume....
A bit more than that

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Racor 1000 Series, Select Micron Filtration, Maximum Flow Rate: 180 GPH
180gph equates to 11.35 litres/minute
I think you were meaning gallons?
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Old 12-22-2018, 04:43 PM   #83
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A bit more than that


180gph equates to 11.35 litres/minute
I think you were meaning gallons?
I may have meant bushels.... But yes, 3 gpm, which declines a bit as soon as the filter starts getting loaded.
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Old 12-22-2018, 07:49 PM   #84
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Steve, you and I both know a certain Fleming 65 that ranges far afield on the world's oceans. How does this vessel polish and deal wth taking on new fuel whether from Scotland, Ecuador or Dutch Harbor?
Venture I has a polishing system, but it's never been used. She's been cruising AK for the last few years and the fuel there tends to be good thanks to the fishing fleet. But she's transited the Canal from the East Coast, been to the Galapagos etc, and has never had a serious fuel contamination issue. She's laid up typically for half a year, which isn't great for fuel. Venture II was used entirely in EU, no fuel issues for her either.

As I said in an earlier post, luck plays a role, as does regular use of the vessel in a seaway, to keep contaminants in suspension, where they are filtered out.

Several years ago I cruised to Antarctica aboard an ice class cruise ship, but this one was different, she was a former factory fishing vessel, and only 290 feet. Built in the early 60s to fish around Greenland year round, twin original MAK diesels, single screw a Y transmission and giant shaft generators. I spent a lot of time in the engine room and the engineer told me that not a drop of diesel made it to his engines without first passing through a centrifuge. The ship was so interesting I wrote an article about her http://stevedmarineconsulting.com/wp...Antarctica.pdf
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Old 12-23-2018, 07:02 AM   #85
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One thought for folks installing a replacement fuel tank might be to oversize the in tank pick up pipe and feed to the first filter.

Folks have at times reported blockages in the pick up pipe that might not happen with a larger pick up.
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Old 12-23-2018, 12:42 PM   #86
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so here's my testimonial...


I bought a new 05 rv with a 5.9 cummins in it and that beast smoked insanely on acceleration. The unburnt fuel was so thick I could swear I saw people using their lights and wipers behind me. LOL


At the time starbrights "startron" was new so I figured, "well its under warranty"...
The stuff was amazing. ZERO smoke whenever I added it and massive smoke when I didnt add it to a tankfull.


The next time I used it was with the trawler I just had. It came with ~400 gallons of 8 - 9 year old diesel that had so much water and bugs that it was black and lumpy. This time I dumped a whole gallon of startron in the (dewatered) fuel, and after a week of recirculating/filtering the fuel, it turned from black to a nice and clear red.


The stuff is great when shocking the fuel for bugs as well as normal concentration for black smoke.
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Old 12-24-2018, 02:37 AM   #87
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I believe there are later tests than this, but it's an interestring article:

https://www.pbo.co.uk/gear/12-diesel...s-tested-43353

BTW, i change treatments every few years in case any bug becomes resistant. Whether that's sensible or not, I just do it!

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Old 12-24-2018, 08:44 AM   #88
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I was right - here's the later test from Practical Boat Owner in 2016.

https://www.pbo.co.uk/gear/12-diesel...s-tested-43353
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Old 12-24-2018, 09:57 PM   #89
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I was right - here's the later test from Practical Boat Owner in 2016.

https://www.pbo.co.uk/gear/12-diesel...s-tested-43353

Wow, one of the very few times a survey actually agreed with my useage of anything boaty.
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Old 01-30-2019, 11:22 PM   #90
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instead of fuel polishing?

You can check www.schaefferoil.com for fuel additives that work.
Under SDS/Tech, look at 137 and 138 series performance packages. #285 is the bug killer. Yes, I do sell it, but to fuel distributors for bulk treatment.
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