1990 Kawasaki TS 650 Fuel Drip
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  1. #1
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    1990 Kawasaki TS 650 Fuel Drip

    Got fuel dripping into the carburetor. I pulled off the carb cover and there is a constant drip coming through the fuel line. Happens for "on" or "res". Drops off when I turn the fuel selector to off. I have another one just like it. The primer bulb is always tight on it. This one always seems to be empty when I come to it. Have to pump it up to get the fuel there. It was flooded today. Now I see why. Any thoughts on what is going on here?

  2. #2
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    Re: 1990 Kawasaki TS 650 Fuel Drip

    Pulled apart this weird carburetor - just stuck wide open. No needle or seat or spring anything in this. Very odd. Cleaned it up, worked better, but just wide open all the time. Going to see if I can get a kit to rebuild this.

  3. #3
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    Re: 1990 Kawasaki TS 650 Fuel Drip

    All watercraft carbs are basically the same. Except The early
    TS has a remote fuel pump, and a squeeze bulb primer.


    Bill M.

    There isn't a reliable replacement for the needle and seat.
    Use the stock needle and seat.

    It is typical for Kawasaki Keihin carbs to be hard starting,
    but like any other watercraft, it can be repaired.
    Last edited by wmazz; 08-17-2022 at 02:51 AM.
    Horsepower == Speed, RPM != Speed



  4. #4
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    Re: 1990 Kawasaki TS 650 Fuel Drip

    Pulled the carb apart - needle stuck open. thx

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    Re: 1990 Kawasaki TS 650 Fuel Drip

    Still not right. Have another ts-650, swapped the carbs and this carb works fine on the other ski. One thing I notice that is different between the two: on the working ski, the primer bulb is tight, full of fuel all the time. On the problem ski the primer bulb always feels empty, or slushy. Any thoughts?

  6. #6
    PWCToday.com Is My Home Away From Home wmazz's Avatar
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    Re: 1990 Kawasaki TS 650 Fuel Drip

    Quote Originally Posted by pbob42 View Post
    Still not right. Have another ts-650, swapped the carbs and this carb works fine on the other ski.
    One thing I notice that is different between the two: on the working ski, the primer bulb is tight,
    full of fuel all the time.

    On the problem ski the primer bulb always feels empty, or slushy. Any thoughts?
    That is the result of either the leaking needle & seat, and/or leaking
    check valve inside the primer.

    The primer is constructed with the same check valves as a
    fuel pump. 1st check valve prevents fuel in the bulb from
    leaking back into the fuel tank (like lifting a column of cola
    upwards with a straw when you seal the top with your finger).
    2nd check valve creates fuel pressure between the primer and
    needle and seat. Until the seat opens.


    Bill M.
    Last edited by wmazz; 08-18-2022 at 07:36 PM.
    Horsepower == Speed, RPM != Speed



  7. #7
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    Re: 1990 Kawasaki TS 650 Fuel Drip

    I swapped out the primer bulb, the carb and the pump. All the parts went into the second ski and worked. All the working parts went into my problem ski and it still has no fuel flow. I have good fuel at the fuel pump inlet. Do I need to check the pulse? What else can I check?

  8. #8
    PWCToday.com Is My Home Away From Home wmazz's Avatar
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    Re: 1990 Kawasaki TS 650 Fuel Drip

    You are saying there is no fuel to the carb? If so that is
    just hard starting. Maybe the same thing as the Yamaha
    triple.


    Try the paper clip trick. It will determine if the fuel
    pump is part of the problem or not.

    Most likely not.


    Bill M.

    This is a test that Kawasaki provided that was not in
    the service manual.

    If it has been several days since you worked on it,
    maybe crank the engine over for 15 to 30 seconds.
    Attached Images Attached Images
    Last edited by wmazz; 08-21-2022 at 01:42 AM.
    Horsepower == Speed, RPM != Speed



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