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  1. #1

    Default Do carb floats go bad ?

    I have a 1998 200 johnson.It won't idle.I've cleaned the carbs and adjusted the float levels , the needle valves look like new but it still has gas coming into the carbs so much I think thats why it won't idle.I've had the carbs off 3 times and can't find anything wrong,and was thinking the floats are sinking and not working .When I squeeze the fuel bulb it just stays soft and dumps gas into the carbs.

  2. #2
    Master Chief Petty Officer stylesabu's Avatar
    Join Date
    Aug 2009
    Glen Ellyn, IL

    Default Re: Do carb floats go bad ?

    floats can good bad, brass can leak at the solder seams, others can absorb gas over time. pull them out and check. if brass you will feel gas slosh in them, all others should float on top of gas, should drop at all
    [FONT="System"][/. ase master tech

  3. #3
    Supreme Mariner
    Join Date
    Jul 2006
    Florida Gulf Coast

    Default Re: Do carb floats go bad ?

    I seriously doubt that motor has brass floats. Doesn't it have the black Nitrophyl floats? Your float valve is probably bad. Or some genius has plugged up the bowl vent.

  4. #4

    Default Re: Do carb floats go bad ?

    It has the Nitrophyl black floats.The valves "look" good to me but maybe I'm missing something.Is the bowl vent the hole in the back between the carb body and the throttle plate ? I put a piece of tubing on the inlet and blew thru it and I can feel air out the back,but maybe I missed one while blowing all of them out.

  5. #5
    Lieutenant Commander
    Join Date
    May 2011
    NW Alabama Tennessee River

    Default Re: Do carb floats go bad ?

    You can shake the floats and tell if they're leaking. I've never had one leak--pretty rare. Most of the carb drip, drip, drip problems are coming from dirty/gummed up needle valve orifices.

    Modern fuel does break down quickly--especially when mixed with oil.

  6. #6
    Join Date
    Oct 2001
    Bonnyville, Alberta

    Default Re: Do carb floats go bad ?

    Is it possible that the lever on the primer valve is in the prime position? This could give the same effect.....
    Alias "schematic"

  7. #7

    Default Re: Do carb floats go bad ?

    Thanks to all of you guys for the help!. It was as petryshyn said,the primer valve was 1/2 open.I'd thought of it but I never had touched it before and it wasn't marked how to set it so I never tried it.I must have bumped it when I put on a new inline filter.Anyway I went to the lake and it took right off and ran good ,I just need to fine tune the carbs again,I got in the rain and didn't do it today.
    Thanks again for the help.

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