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  1. 10-08-2012, 02:26 PM #1
    prawntrap
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    anti siphon valve

    Hey Guys

    I installed a new fuel tank on my boat and now am getting a periodic check engine light. I know this is fuel restriction. I called the manufacture of the tank and confirmed that they have installed anti siphon valves. I know where they are. When you are re=installing the barbed part of the 90 deg fuel outlet fitting. do I need to use teflon tape etc before I screw it back on?
    Thanks
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  2. Bassmeister
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    #2 10-08-2012, 03:49 PM
    I would... Making sure none gets over the end of the fitting.
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  3. ChampioNman
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    #3 10-08-2012, 05:09 PM
    I use thread sealant.
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  4. prawntrap
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    #4 10-09-2012, 08:07 PM
    Thanks guys, I have not removed it yet. Do I just pull out the spring with needle nose and ball bearing should come right out?
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  5. prawntrap
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    #5 10-09-2012, 08:11 PM

    Thumbs Up

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  6. SEAHORSE
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    #6 10-10-2012, 07:08 AM
    You can't reach the spring with pliers. Use a punch through the nipple while it's held in a vise, then hammer out the internal ball, spring, and retainer.

    The brass and stainless steel anti-siphon valve sold through the Evinrude Parts and Accessories catalog is a quality item for those who want to keep the safety feature of the item or where it is Federally required on an inboard engine craft.

    Use a gasoline resistant thread sealant on installation. Thread tape is not recommended as it tears and leaves bits of material when the fitting is eventually removed.
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  7. Bassmeister
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    #7 10-10-2012, 03:51 PM
    Quote Originally Posted by SEAHORSE View Post
    You can't reach the spring with pliers. Use a punch through the nipple while it's held in a vise, then hammer out the internal ball, spring, and retainer.

    The brass and stainless steel anti-siphon valve sold through the Evinrude Parts and Accessories catalog is a quality item for those who want to keep the safety feature of the item or where it is Federally required on an inboard engine craft.

    Use a gasoline resistant thread sealant on installation. Thread tape is not recommended as it tears and leaves bits of material when the fitting is eventually removed.
    I stand corrected by Fred and SH on the tape!!
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  8. JER-1 BIG BASS
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    #8 10-11-2012, 08:48 PM
    I used gasoline resistant thread sealant , picked it up at NAPA Just a little tube pricey but better than a future unwanted leak.
    BIG BASS


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  9. DTW2
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    #9 10-13-2012, 05:37 PM
    how do you build pressure and hold pressure if you remove the ball and spring?
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  10. SEAHORSE
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    #10 10-13-2012, 06:00 PM
    Fuel is "sucked up" from the gas tank to the fuel pump and/or primer ball, there is only vacuum in the lines. The anti-siphon valve lives up to its name in case a fuel line leaks or breaks by preventing gravity from filling up your boat's bilge with gasoline.
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