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Old 03-07-2005, 08:55 PM
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Simple fuel line question

I did a search and I could not find what I was looking for. I was just wondering how you measure fuel line. Is it the inside or outside diameter that you measure.

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Old 03-07-2005, 09:04 PM
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Inside diameter
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Old 03-07-2005, 09:06 PM
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neopreme line is measured on the inside, metal line is measured on the outside.
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Old 03-07-2005, 09:06 PM
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thanks I was hoping for outside but now I know thanks again
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Old 03-07-2005, 09:50 PM
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I have steel line and mesured it was 3/8 on the outside so it is 3/8 or 5/16 or something else?
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Old 03-07-2005, 09:54 PM
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If it is 3/8" on the oustide how could it be 3/8" on the inside?

You have to allow for the thickness of the tubing.
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Old 03-07-2005, 09:56 PM
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sorry I might have worded that wrong, I was just told to run 3/8 fuel line and was wondering what I have now, and it is 3/8 on the outside
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Old 03-07-2005, 10:00 PM
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I can't say for sure if it is inside or outside diameter. I have always just run new line to start out with. I get aluminum line from the hardware store, and the flaring tool. I get the 3/8" flare nuts and call it good. It is cheap, easy, and aluminum is easy to work with.
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Old 03-07-2005, 10:08 PM
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Measurement is the inside diameter.
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