No fuel to carb

Discussion in 'Sportster Models' started by Freegul, Jan 1, 2013.

  1. Freegul

    Freegul Member

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    I have a 2000 sportster 1200 custom that won't start. I have narrowed it down to fuel not getting into carb. I have removed petcock and cleaned filter. Fuel seems to be getting to the petcock by testing with new vacuum line. When I spray gas into the carb,she fires right up. Any suggestions would be greatly appreciated.
     
  2. fin_676

    fin_676 Experienced Member Staff Member Moderator Contributor

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    Is the fuel getting through the petcock
    is the fuel getting through the fuel line
    Disconnect the fuel line from the carb place the end into a suitable container and turn the petcock to the on position if it is vacuum operated petcock apply some suction to the vacuum pipe
    If fuel flows then the problem is in the carb if it does not then either the petcock or the fuel line is the problem
    Disconnect the fuel line at the petcock and again check for fuel flow if nothing at the petcock then replace it if there is fuel at the petcock then the fuel line is the problem and replace it
    However as the bike has a few years of life on it it may be that the carb is in need of refurbishment as modern fuels are hard on some of the carb seals and rubber parts
    But you do need to work out how far the fuel is getting before you can go any further

    Brian
     
  3. Bodeen

    Bodeen Well-Known Member Staff Member Moderator Contributor

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    As Fin said, If your sure the screen on the inlet side of petcock is clean (inside tank) and you still have no fuel with vacuum applied. The vacuum diaphragm is most likely bad and needs replaced. The other thing is that there is so much corrosion in the tank that it is plugging the screen. Let us know what you find.
     
  4. Freegul

    Freegul Member

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    Thanks Guys . I've got it narrowed down to carb. Gonna drop the float bowl tomorrow and check main jet for clog.I'll let you know how I made out. Have a great weekend, Ric
     
  5. Slo-Ryd

    Slo-Ryd Junior Member Contributor

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    What you want to check is the float needle. Perhaps it's stuck closed. In any case, I'd replace it while you're in there and adjust the float level.

    The main jet being clogged wouldn't prevent it from starting. It would exhibit driveability problems instead.
     
  6. fin_676

    fin_676 Experienced Member Staff Member Moderator Contributor

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    The float needle has a rubber tip that can go hard after a few years and usually fails to seal however it could stick to the seat also
    Check also when doing work on the carb that the accelerator pump is working
    With the air cleaner removed from the bike snap the throttle open fuel should squirt down the centre of the carb throat from the accelerator jet however if there is no fuel in the float bowl it has none to work with
    with the carb still fitted remove the drain pipe from the bottom of the float bowl fit a length of clear plastic pipe and secure it to the top of the carb open the drain screw and the pipe should fill up with fuel to the level it is inside the float bowl and will give an easy reference to float bowl level

    Brian
     
  7. Freegul

    Freegul Member

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    Gone in the shop this week, guess some things better left to professionals. I'll keep you posted. I removed carb and inspected,all looked good. Thanks for all your feedback. Ride safe !! Ric
     
  8. Freegul

    Freegul Member

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    Back on the road. I had the petcock replaced with new one that doesn't require a vacuum hose. Runs good , starts fast , idle is a little higher though. Thanks again for all your feed back. Hope I can return favor. Feels good to ride again!! Ric
    :)
     
  9. BUBBIE

    BUBBIE Well-Known Member

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    Did THEY put a CAP Plug on the carb nipple tube to keep the Vacuum from LEAKING ? (sucking Air?)

    That Nipple tube INTO the carb Needs to be capped off OR it will cause problems...

    signed....BUBBIE
     
  10. Freegul

    Freegul Member

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    I'll check it. Thank you very much! Ric