Accidentally left petcock open, fuel on floor...is my float stuck?
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Thread: Accidentally left petcock open, fuel on floor...is my float stuck?

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    Junior Member erleichda's Avatar
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    Accidentally left petcock open, fuel on floor...is my float stuck?

    As per title, is this a symptom of a stuck float? I can crack the bowl and see if it moves freely, but do I have to or is this normal if petcock is not closed? Fuel was dripping out air filter.
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    Senior Member drstimpy's Avatar
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    Float needle seal may need refreshing.


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    Senior Member scotti158's Avatar
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    Probably time for a new needle and seat and a good carb cleaning.
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    Senior Member stagewex's Avatar
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    If you have a kick starter, without the ignition on try and slowly turn the motor. No kickstarter... put it in third and turn the engine. You can do both of these with the spark plug out if you feel a lot of pressure and fuel got into your engine. A good way to avoid Hydrolock.
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    Senior Member RockyTFS's Avatar
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    Quote Originally Posted by erleichda View Post
    As per title, is this a symptom of a stuck float? .........
    Yes, precisely. Or a leaking float needle seat. If gas was dripping out the airbox, it was also likely dripping into the cylinder, so you will need to check for gas smell at the oil filler neck...probably you should assume the oil is contaminated with a substantial amount of gas...not good for bearings.....AT ALL!

    If all the above is normal, the petcock can be left on for long periods, AS LONG AS THE BIKE IS NOT TRAILERED!
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  7. #6
    Ken
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    Senior Member Ken's Avatar
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    Check the oil to make sure it doesn't have gas in it. If it does change it out. The engine could explode if a spark were to ignite trapped vapors in the crankcase. Sometimes just a small bit of trash can hold a needle open and cause it to leak. I always shut the petcock off because this can possibly happen at any time. As others stated your seat and needle could be worn.

  8. #7
    Senior Member elime's Avatar
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    Quote Originally Posted by erleichda View Post
    As per title, is this a symptom of a stuck float? I can crack the bowl and see if it moves freely, but do I have to or is this normal if petcock is not closed? Fuel was dripping out air filter.
    I had this problem and it was an o-ring. See red arrow -- I replaced it and all was well.

    Float1.jpg

    Or it could be the needle.........

    P4160950.JPG
    Last edited by elime; 05-25-2017 at 09:02 PM.
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    Long live the internal combustion engine!

  9. #8
    Senior Member Rockit's Avatar
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    I had this same issue happen when I trailered my TW from Sacramento to San Diego. Before I left I made sure the petcock valve was set to off and I ran all the fuel out of the carburator. When I got to San Diego I opened the petcock valve and fuel started overflowing from the carburator. I read on line that the float might be stuck so I hit the carb bowl with a ratchet handle a couple of times. I then turned the petcock valve to the on position and everything worked fine. It's an easy way to attempt a repair. Give it a shot.
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    Senior Member phelonius's Avatar
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    Yes, your bike is incontinent.
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    Phelonius

  11. #10
    Junior Member olderthandirt's Avatar
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    Rocky - your comment on trailering may help me - I am a new TW200 owner and noticed today while trailering that fuel was dripping out of the float bowl drain hose. I stopped to check the tie down and noticed a drip that stopped soon after I pulled over. The drain screw was tight and the fuel petcock was in the on position. Appears to only drip when trailering - not when stopped or riding. Bike runs good before and after. What gives?
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