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gotta fuel leak and cant figure out why...

Discussion in 'XJ Technical Chat' started by roninn, Mar 29, 2011.

  1. roninn

    roninn New Member

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    put in the carbs, got fuel lines hooked up, turned on the flow, and fuel pukes out the air box. dunno why cant see into it to find the source.
    any ideas?
     
    roninn, Mar 29, 2011
    #1
  2. mlew

    mlew Well-Known Member

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    Floats are not seating, or stuck. This sometimes happens after a carb overhaul, tap the carbs with a rubber mallet a few times. If that does not help and you can't see exactly where the fuel is leaking from then the carbs will have to come out again.
    Did you do a fuel level check while the carbs were out?
     
    mlew, Mar 29, 2011
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  3. macros10

    macros10 Member

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    Float levels checked? I'd smell the oil cap and hole also to see if it's going into the crankcase. I'm assuming it did this while running, not just when turned to prime? Cuz that would really be crazy, lol.
     
    macros10, Mar 29, 2011
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  4. roninn

    roninn New Member

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    no. did not do a fuel level check while they were out. and its doing it while in the ON position, not the prime.
     
    roninn, Mar 29, 2011
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  5. stunnuts

    stunnuts Member

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    Check the needle and seat valves
     
    stunnuts, Mar 29, 2011
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  6. roninn

    roninn New Member

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    ok. can see fuel leaking out of the two right side carbs.
     
    roninn, Mar 29, 2011
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  7. bigfitz52

    bigfitz52 Well-Known Member Premium Member

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    Stuck or misadjusted floats. Pull the rack; they need to be set "wet" anyway, but they do have to be set correctly. Float levels have a tolerance of 3mm total +/- and are critical to how the bike runs.
     
    bigfitz52, Mar 29, 2011
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  8. roninn

    roninn New Member

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    think i got it. i may have had the lines reversed. damn i feel stupid sometimes...
     
    roninn, Mar 29, 2011
    #8
  9. Maxim-X

    Maxim-X Well-Known Member

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    Like macros said.........
    Definitely check the oil for a gassy smell and change before trying to run the bike. If as much gas came out as you said some may have gone down through the pistons and contaminated the oil.
     
    Maxim-X, Mar 29, 2011
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  10. adrian1

    adrian1 Active Member

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    Presuming you have a vacuum type tap fitted and you were in the on position and "if" the bike was not running, you have a badly leaking petcock. Search on "petcock" to find out how to fix it.

    Oh and welcome to the circus - pls put your bike details in your visible profile so we can diagnose easier :wink:
     
    adrian1, Mar 30, 2011
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  11. Rickinduncan

    Rickinduncan Member

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    I think what he was saying was that he hooked up the petcock wrong - put the 'gasoline out' line to the 'vacuum in' line
     
    Rickinduncan, Mar 30, 2011
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  12. cutlass79500

    cutlass79500 Well-Known Member

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    i sure hope you didnt try to start it. if you did there is a very good chance you ruined the motor especially if the intake valve was open on that cyl. if you havnt pull the plug the vac line is hooked to and crank it over without a plug. Gas does non compress will take a piston out bend a rod or hammer the bearing flat
     
    cutlass79500, Mar 30, 2011
    #12

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