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  1. 08-19-2018, 04:50 PM #1
    Jwebre74
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    300xs High idle at startup

    I’ve noticed the last few times I’ve been out in my boat , I start the engine and it idles high for a second or two then it’s idles down. Anyone have an idea what may be the issue. 2017 300xs Serial number 1E053228
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  2. JOE54
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    #2 08-20-2018, 07:16 AM
    check for fuel in air side of system , likely tracker valve bad
    .................................................. ...the scariest thing in life is the unknown ...................................
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  3. EuropeanAM
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    Mercury 3L/4 Stroke/Verado Moderator EuropeanAM's Avatar
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    #3 08-21-2018, 12:37 PM
    Air/Fuel Pressure Tests- record results for:

    -Idle
    -Under Acceleration
    -5/10/15 seconds after engine shutdown (restart for each time period).

    Will catch 80%+ of leaks occuring...


    Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
    Still consider myself a "Marine Apprentice" after 47 years (learn something new every day).
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  4. crank68
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    #4 08-21-2018, 08:54 PM
    It was a tracker valve for me...
    BULLET 20 XRD/250 Merc Sport XS
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