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  1. #1
    Member
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    Jun 2009
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    lagrange
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    3

    05 250xs stutters at top speed

    I was wondering if anyone could point me in the right direction. My 2005 250xs planes fine and runs at medium RPM fine but as soon as I get on it it seems that it will run so-so for a short distance but around a 1/4 mile or so it starts sputtering a bit like it is running out of gas. If I come off the throttle to about 3500-4500 it levels back out and runs fine. As soon as I get on it again it does the same thing and hestitates and surges hestitates and surges and so on. Any suggestions? Thanks

  2. Mercury 3L/4 Stroke/Verado Moderator EuropeanAM's Avatar
    Join Date
    Apr 2008
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    Greenville, SC (US)
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    98,022
    #2

    Re: 05 250xs stutters at top speed (csilcox)

    Have a buddy run along with you.... when it's acting up, have him pump the primer bulb to see if it "attempts to recover".

    If so.... it's a fuel delivery issue, such as:

    -Fuel line/Primer Bulb/ Anti-Siphon Valve
    -Pulse Fuel Pump
    -Restricted Fuel Filter
    -Low Pressure Fuel Pump
    -Debris in VST



    Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
    Still consider myself a "Marine Apprentice" after 48 years (learn something new every day).
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  3. Member
    Join Date
    Mar 2007
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    Worcester
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    1,335
    #3

    Re: 05 250xs stutters at top speed (csilcox)

    It would be nice to know at what rpm {exactly} it's happening at....if WOT, you might be on the limiter.....

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