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Racor filters
I use a Parker/Racor fuel filtering funnel when pouring diesel fuel in my tractor to keep moisture out and it drives me nuts that it doesn't drain all the way. It leaves a good 1/8" of fuel in the bottom of the filter no matter what I do. It's apparent from the design that it will never drain all the way and the problem is so obvious I can't believe they screwed this up.
Anyone else use one of these? Mine is the large size, and if the small one doesn't have this problem I'll get a small one instead.
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Where did you buy your filter funnel Ken. I have been looking for one but have not found any locally or on the internet for a sane price. I have the filter on my fuel tank but another sure does not hurt.
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Why from Mr. Funnel, where else 
Seriously. See link.
Link:
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The documentation on their website says that this small amount of fuel in the bottom is normal and you just have to dump it out.
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I didn't see that. It may be normal but it's normal for a flawed design and it didn't have to be that way. From a design standpoint all they had to do was recess the filter another 1/8" toward the spout to fix the problem. Oh well, I still like the funnel but this was just bad design.
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This problem is not that big a deal, but I had a thought about how to fix it. I think if I mixed up some epoxy (is epoxy fuel safe?), poured it into the bottom of the funnel and let it pool around the base of the filter (which sticks up out of the center of the funnel) it would act as sort of a leveling compound and fill in the space that causes wasted fuel.
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This was taken from the FAQ section
Q. What do I do with the stuff left in the sump at the bottom of the funnel after refueling?
A. This technology requires the sump to help separate the contamination from the fuel so it can't be eliminated. You can pour it back into the gas can you were using or have a separate container to place it into. When the container gets full you can run it back through the funnel and you will never waste a drop of useable fuel
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Thanks for the info BountyHunter. I still don't see how this sump is required. Do you have one of these funnels to look at? There is a large filter element sticking up out of the center of the funnel. If you fill the funnel to the brim with straight water, covering the filter element completely, no water will come through the funnel. I don't understand how the presence or absence of the sump would make a bit of difference. Out of curiosity I may plug it up anyway to see what happens. When I don't understand something like this it drives me crazy. Maybe I've already reached that destination
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I haven't quite got a pic in mind of the filter but I wonder if it works like a sediment bowl to separate large pieces of sediment and water. I think some filter elements may stop water and others won't so a bowl would be needed. If that's what it is, it seems a little generous of them to call a sediment bowl a technology.
Myself, I have a hand pump that fits on standard fuel jugs. The inlet tube doesn't go quite to the bottom so the pump doesn't pick up condensation and sediment. Every year or so I use what the pump won't pick up for parts cleaning or just dump it in the furnace oil tank. There hasn't been enough condensation or sediment to bother the furnace filter.
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I suppose it's purpose could be used to allow sediment to settle out, but it's a funnel. It seems that the volume of fuel passing through and the swirling action of fuel being poured into the funnel and draining out of it would stir up enough sediment to make the small "sump" not very useful. But what the heck do I know?
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Racor filters: Diesel Fuel Lubrication Engine Additives -- Tractor Maintenance Discussion Forum
Shibaura SD2203 rear axle oil 
10-24-2003, 14:55 
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