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Should fuel come out of the petcock in ON or RES?

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  • Should fuel come out of the petcock in ON or RES?

    From what I read this shouldn't happen. I'm trying to get a poorly stored bike running again. It ran on first try with bad battery about two weeks ago, but I think bad fuel and/or too much seafoam (full can in like half a tank) is leading to no starting now. When I pulled the fuel hose off the petcock gas kept coming out of it, not much like a half stream, but it was steady. I had it in the ON position. I thought without pressure applied to the vacuum hose this shouldn't happen. Does this point to a problem with the petcock?

  • #2
    if the engine is off the only time fuel should come out is on prime(oops)


    drain the tank , drain the carbs , fresh fuel and spark plugs
    make sure the petcock is functioning properly , if the carbs are dirty a malfunctioning petcock could fill the crankcase with fuel
    Last edited by rexazz2; 05-21-2012, 07:59 PM.
    Blood , its in you to give! http://www.blood.ca/

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    • #3
      I thought is the only time was when on Prime?
      http://www.wickedelements.com



      ^^^^^^

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      • #4
        Originally posted by wickeded View Post
        I thought is the only time was when on Prime?
        It should. Reserve needs vacuum.

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        • #5
          Ooh fast responses. Thanks. Well I may or may not have found the problem. Besides being difficult to turn, I found a cracked or at least cracking o-ring on the petcock selector. Sorry for the nasty state of it. This atrocious teal paint the previous owner used is all over the place and it's oxidized or something like that.

          EDIT: Yall might get a kick out of the fuel I tried to start the bike with. [ame="http://www.youtube.com/watch?v=GnClqSePIUk"]Suzuki Katana 600 Bad Fuel - YouTube[/ame]
          Attached Files
          Last edited by setite; 05-21-2012, 07:24 PM.

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          • #6
            Go ahead and pull the back off the petcock. There's another o-ring in there that actually controlls the fuel flow.
            When all else fails get a bigger hammer

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            • #7
              Rebuild how to:
              A forum filled with write-ups, FAQ's, and visual aids for
              mechanical & cosmetic modifications to your Katana.
              http://www.wickedelements.com



              ^^^^^^

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              • #8
                Originally posted by wickeded View Post
                I thought is the only time was when on Prime?
                yep OOPS
                Blood , its in you to give! http://www.blood.ca/

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                • #9
                  Originally posted by phantasm View Post
                  Go ahead and pull the back off the petcock. There's another o-ring in there that actually controlls the fuel flow.
                  I don't know what I-ring you mean. From the rebuild I only see the one on the selector and one that presses between the tank and the petcock

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