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Thread: Primer Lines

  1. #1

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    Default Primer Lines

    For primer lines I have the AN800-2 compression balls, engine side, I am having difficulty finding the correct nuts for the end that connects to the primmer body?any ideas?

  2. #2

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    Default Re: Primer Lines

    I encountered a situation on an L-3 primer a while back. Someone had tried to use a compression ferrel with it when it needed a cone (an800-2) instead. More fuel would squirt inside the cockpit than would make it to the engine every time the primer was pumped. The compression fitting nut wouldn’t fit over the cone. Aircraft Spruce lists the AN805-2 nut on the same page as the cone. It should be the one unless the thread pitch is different.

  3. #3

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    Default Re: Primer Lines

    I guess I should have asked;

    Is your primer body connection different than the nozzles? If no, then the same place you got the other from. If yes, we need to know what you have. The Skyhawk I am inspecting has flared. The L-3 has cones. I saw compression fittings talked about in another thread. Nothing is interchangeable. What do you have?

  4. #4
    smcnutt's Avatar
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    Default Re: Primer Lines

    Not the expert but here's what we bought from AS

    UNION CONE AN800-2
    BRASS UNION NUT AN805-2
    COPPER TUBING 1/8 X .030
    “Common sense is in spite of, not the result of, education.”
    ― Victor Hugo

  5. #5
    Administrator Steve Pierce's Avatar
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    Default Re: Primer Lines

    I have been installing the primer system in a Super Cub Iam rebuilding. I ran out of 1/8" copper tubing and nobody in town had any. Found a kit for installing a pressure gauge with 6 feet of tubing and some fittings. The fittings had a cone with an angle on one side and since I already had fittings I sat them aside. Ran the tubing and thought this tubing shapes really nice. When I went to flare the end at the engine I discovered it was really thin, not the .030" I was use to. Since it has a tendancy to crack anyway I am pulling it back out. My 25 foot roll is supposed to be here today. Was really surprised that none of the auto parts, hardware stores or supply stores in townhad 1/8" copper tubing.

  6. #6

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    Default Re: Primer Lines

    I have forgotten where I got the copper for the L-3 but I know I couldn’t pick it up in town either.

  7. #7
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    Default Re: Primer Lines

    The difference in the copper tubing in the gauge kit from China and the Dorman Products tubing made in the USA.
    20190814_161255.jpg

  8. #8
    andya's Avatar
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    Default Re: Primer Lines

    for the Dorman tubing, do they quote a wall thickness?
    Where do you purchase that?
    Thanks
    "Progress is our most important problem"

  9. #9
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    Default Re: Primer Lines

    .030" and I ordered it through O'Reilly auto parts but Spruce has it as well.

  10. #10

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    Default Re: Primer Lines

    Thread pitch is different, but the standard 1/8 compression fitting and nut works.

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