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  1. #1

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    -97 spx stops when cold

    I have just rebuild the engine and the carbs. When i run it at low rpm and it is cold and do a small aceleration it suddenly stops. When i press start it starts right up again.
    When this happens it is like you pull the lanyard.
    This only happens before it gets warm.

    Anyone have a suggestion?

    Ola
    Norway


  2. #2
    Warm it up before you accelerate.

  3. #3
    96XPSS's Avatar
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    Have you run the engine long enough to completely fill the carbs? I would say it takes 30 seconds. And what are your low speed screw settings? Did you remove, disassemble, and clean, the fuel selector switch also?

  4. #4

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    It is like this the 10-15 first minutes when it is cold.
    The low speed screw is after the book, 1 turn out.
    The fuel select valve is new and all the fuel lines are new.

  5. #5
    dghal's Avatar
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    sounds like it is lean,, Do you have choke plates??
    If so leave it choked for a bit and see if that makes a difference,

    Sounds like the low speed circuits may be dirty in the carbs

  6. #6
    96XPSS's Avatar
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    http://www.greenhulk.net/forums/showthread.php?t=27314

    Read the third paragraph in post #8 and tell me if you did that.

    Also check the pulse line for cracks, and the mica check valves in the fuel pump for cracks and proper seating.

  7. #7
    96XPSS's Avatar
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    Quote Originally Posted by OMN View Post
    It is like this the 10-15 first minutes when it is cold.
    The low speed screw is after the book, 1 turn out.
    The fuel select valve is new and all the fuel lines are new.
    I think the stock location for the low speed is 1.25 out, +/-.25, so you could go as much as 1.5 out and it still be sufficient.

  8. #8

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    I havent done that you wrote in:third paragraph in post #8.

    First i will adjust the low speed screw out and do some testing.

    The pulse line is new and also check valves in the pump.

  9. #9
    96XPSS's Avatar
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    Cool. Hoepfully going out on the screws will correct it. If you replaced the check valves the rubber grommet might not be seated all the way in, keeping the valves from seating against the plate tightly. They can be a pain to install. If both of those don't fix it, I'd pull them and spray through the pilot jets.

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