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  1. #1
    derwin66's Avatar
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    Flat Spot In 97xp

    Okay just come back from three weeks leave wave jumping holiday. Carbs were rebuilt and filters cleaned, tank cleaned a day before I left. The ski developed a flat spot on initial take off within a day of starting leave. Put new plugs in and cleaned fuel filter bowl. My thought is there must be something in my fuel tank getting through to the carbs. Any ideas what is causing this. Thanks in advance


  2. #2
    rotaxmech's Avatar
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    bogging

    check the adjustment on the low speed screws. Look for 1 1/4 + or- 1/4 until you get the best hole-shot.

    CBL

  3. #3
    Tool Bag water worx's Avatar
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    Check & make sure the accel pump is working.

  4. #4
    lextoy's Avatar
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    put a inline fuel filter, little plastic kind, right before your carbs. easy way to keep any fuel system crud from clogging your carb filters.
    have you checked the rave valves?
    sounds like an adjustment problem to me also.
    play with the low speed screws. figure out where they are currently set.
    then try 1/2 turn increments so you can feel when they get obviously to rich. then lean out at 1/4 to 1/8 turns until you find sweet spot.
    ski should idle for 1 minute and take off with instant response.
    restart when warm without any throttle application. and idle smooth without stalling(flood) or running away(lean)
    also ski should return to same idle rpm quickly and steadily after every throttle blip. if idle is wandering then you need to adjust.
    never play with the idle speed screw it should be set properly (from before) and is not a solution to carb tuning.

  5. #5
    Tool Bag water worx's Avatar
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    Quote Originally Posted by lextoy View Post
    put a inline fuel filter, little plastic kind, right before your carbs. easy way to keep any fuel system crud from clogging your carb filters.

    Sorry Lex gotta call BS on that one...

    Fact The biggest amount of build up is always in the second carb.

    There are fuel lines from #1 carb to feed #2 carb,how is that filter gonna help ???

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