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Thread: pilot screw washer and o ring

  1. #1
    Junior Member numb41's Avatar
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    pilot screw washer and o ring

    Hey. Got a 1998 t dub. it has an older style carb, as the pilot screw is inside the bowl, not outside. anyways, the washer that goes on the pilot screw after the spring, does not allow the threads to reach the threads in the carb body. I can see why the washer is there (so it doesn't tear up the o ring). Did I get the wrong carb kit?
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    Senior Member elime's Avatar
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    The o-ring goes in the groove on the head of the screw.

    P3190024 (2).JPG

    You can tell if it is making a good seal by inserting it backwards. If it is real loose it is a bad seal. I was having troubles tuning my bike but then I replaced the little o-ring it made a huge difference. I guess air leaking around the o-ring prevented fuel from being drawn in. Put a drop of oil on the o-ring so it slides in easily.

    P3190026 (2).JPG
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    Long live the internal combustion engine!

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    Super Moderator littletommy's Avatar
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    Welcome to the forum!!
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    Ken
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    Quote Originally Posted by elime View Post
    The o-ring goes in the groove on the head of the screw.

    P3190024 (2).JPG

    You can tell if it is making a good seal by inserting it backwards. If it is real loose it is a bad seal. I was having troubles tuning my bike but then I replaced the little o-ring it made a huge difference. I guess air leaking around the o-ring prevented fuel from being drawn in. Put a drop of oil on the o-ring so it slides in easily.

    P3190026 (2).JPG
    That's a good trick to see if that seals well.
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    Ken
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    Welcome to the forum from Texas.
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  7. #6
    Junior Member numb41's Avatar
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    Hey guys, it's just me, the KING of stupid questions. So, where is that little washer supposed to go?

  8. #7
    Junior Member numb41's Avatar
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    I put the o ring where its supposed to go and it don't even fill up half the space...idk, don't look right to me.

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    Senior Member elime's Avatar
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    Quote Originally Posted by numb41 View Post
    Hey guys, it's just me, the KING of stupid questions. So, where is that little washer supposed to go?
    I took the idle mixture screw out of a spare carburetor and there is no washer. If it were me I would put it between the screw and the spring.
    P8240046.JPG


    Quote Originally Posted by numb41 View Post
    I put the o ring where its supposed to go and it don't even fill up half the space...idk, don't look right to me.
    If you look into the hole the where the mixture screw goes you will see a step about a 1/4" or so inside. The o-ring is supposed to make a seal between the screw and the outer wall of the hole as it goes past this step. If it only fills half the groove it doesn't matter as long as the seal between the wall and screw is maintained.

    Try putting the screw in backwards without the o-ring and see how it feels. Then try with the o-ring. I should be more difficult as the o-ring gets compressed. If not, then the o-ring is to small.

    P8240044.JPGP8240045.JPG
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  10. #9
    Banned Vishwa Kau's Avatar
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    Quote Originally Posted by elime View Post
    The o-ring goes in the groove on the head of the screw.

    P3190024 (2).JPG

    You can tell if it is making a good seal by inserting it backwards. If it is real loose it is a bad seal. I was having troubles tuning my bike but then I replaced the little o-ring it made a huge difference. I guess air leaking around the o-ring prevented fuel from being drawn in. Put a drop of oil on the o-ring so it slides in easily.

    P3190026 (2).JPG
    Where Did You Buy It ? The Little O- Ring

  11. #10
    Senior Member DougDotyTW200's Avatar
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    Quote Originally Posted by numb41 View Post
    I put the o ring where its supposed to go and it don't even fill up half the space...idk, don't look right to me.
    can you share a picture ??
    2016, stock'ish and a 2003 Starting on a 225 or bigger 6 speed build as a spare for now and install later when done and ready on this bike.

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