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Thread: Hot start

  1. #1
    dsgamermike's Avatar
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    Hot start

    Hello all. I just had a new issue arise. I have a 97XP with a 787. What is happening is that it's starting great when it's cold. I'll go ride it around for awhile and when it's nice and hot, I'll stop and shut it off. If I sit between 2 mins and about 5 hours It will not restart with out being a huge pain. It is a fueling issue because I checked to see if the accelerator was pumping. There was no fluid in it. Basically the lines are draining and then it's having a really hard time pulling suction again. I even tried with a fuel line straight from the tank, through the filter, to the carb. I know it's not the line its self. It could be the filter, but I doubt it. So that leaves something in the carb. If I understand correctly the pulse line pulls a vacuum, which pulls the fuel through the lines. Is there anything in the engine that runs the pulse line that could go bad? I do have leaky RV seals on the crank. Would that cause any issues?
    Thanks.


  2. #2
    Most hot start issues are caused by excessive rotory valve to cover clearance..

  3. #3
    dsgamermike's Avatar
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    Would that cause a vacuum loss in the fuel line?

  4. #4
    weak pulse - yes..

  5. #5
    SURFnTURF's Avatar
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    Check your Needle and seats .When it sits for awhile does it eventually start but all choked up?

  6. #6
    dsgamermike's Avatar
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    When it does start, it will only idle. If you give it any gas it'll die. It will take about 60 seconds before it responds to any throttle.

  7. #7
    based on your last statement - rebuild your fuel pump - it appears you have a bad check valve or deformed pump diaphram..

  8. #8
    GAV's Avatar
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    just throwing it out there sounds like heat sink
    where the heat from the engine evaporates the fuel from the carb
    we used to put 3 carb gaskets on to try to stop the problem
    have you tryed chokeing or priming it ?

  9. #9
    AndinoWatercraft's Avatar
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    When this happens the fuel filter is filled? maybe the tank vent o check valve is stuck or clogged .

    just my .02

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