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carb STILL Leaking

Discussion in '1st & 2nd Generation 1983-1989' started by fatso1277, May 29, 2012.

  1. fatso1277

    fatso1277 New Member

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    Okay back at and i pulled carb off and one of the floats was stuck. SO set that correctly and also changed bowl gaskets. also tested spark plugs and got a nice spark from it. also charged battery completely. well i poured the fuel it came running out of the carb, AGAIN. so not sure what next?
     


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  2. crustyrider

    crustyrider New Member

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    when was the last time you had fuel in the carbs? I just ran some thru mine and they leaked... until the o rings swelled again.. now no leaks... give it a day to swell the rings then check.... hopefully you don't have a badO ring on the fuel rails...
     


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  3. TOE CUTTER

    TOE CUTTER Mullet Man

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    Shame you are not local, would love to take care of this for you.
     


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  4. tinkerinWstuff

    tinkerinWstuff Administrator Staff Member

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    these carbs are such a PITA to install/remove that doing a bench test with fuel is highly recommended.
     


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  5. squirrelman

    squirrelman Member

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    IMG_1230.jpg IMG_1206.JPG

    Every set of carbs i work on gets bench tests for fuel level and leakage using a spare fuel pump to pressurize them before i consider the job completed.

    If fatso has the carbs in place, it's usually possible to locate a leaky float needle (IF that's his problem!|) by looking down the carb throats after the air filter is removed. With key on and cranking over a bit to fill the carbs, wet fuel bubbling up out of the slide needle hole should be evident somewhere.

    If you've cleaned stuff up and still have a leaky float needle, just replace it.
     
    Last edited: May 30, 2012


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  6. fatso1277

    fatso1277 New Member

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    could it be something else that i am missing that is not causing it to start. when i had the carbs off testing the spark plugs i could see the components in engine moving. but nothing in carbs are moving? just trying to cover all my bases. i would suspect even with a leak the bike could still start.
     


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  7. orion3814

    orion3814 New Member

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    When u have the carbs off and the floats out look at the floats if they are plastic they could have seperated and allowing them to fill with gas thus becoming inefective as a float and becoming an anchor.. I racked my friggin brain for a week on leaking carbs and then I noticed fluid in one of the floats. Sure as shit a additive a previous owner used in the carbs to degum the varnish attacked the glue sealing the floats up. Just a thought from my own personal experience. Pull the floats and tie a weight to them and drop them in a mason jar full of gas look for bubbles. Inspect them floats real good if they are plastic
     


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  8. commrad

    commrad New Member

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    been there done that but on a MUCH easier carb to get at. :pisser:Yamaha 4 wheeler

    if it is the o-rings you can add some marvel mystery oil to the gas, about double or more than recommended and it will swell them back up and soften them and when running it will get some carbon out of the engine.
     


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  9. fatso1277

    fatso1277 New Member

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    okay got an update sorry for the delay, but been relocating. so finally got a few minutes to test the carbs again. and connected gas can straight to carb. and poured away and no leaks...woohoo...well felt a little lucky and tried to crank. no go, battery was to low. but i did finally did feel the exhaust pushing air out. so gonna charge battery up completely and go at it again with fuel going straight to carb.
     


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