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  1. #1
    GTHOM PumaMatt's Avatar
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    Cold running 250 ProXS

    My smartcraft shows that my 250 ProXS isnt warming up past about 90 degress. I pulled the tstats and there was no debris holding them open. Where do I need to look next?

  2. Member
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    little rock
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    #2

    Re: Cold running 250 ProXS (PumaMatt)

    Poppit valve ?

  3. Member
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    Tonto Basin, AZ
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    #3

    Re: Cold running 250 ProXS (dbasketman)

    <table width="90%" cellspacing=0 cellpadding=0 align=center><tr><td>Quote, originally posted by dbasketman &raquo;</td></tr><tr><td class="quote">Poppit valve ?
    </td></tr></table>

    ^^^^^^
    Start here.
    So many honey-dos . . . . . so little motivation

  4. GTHOM PumaMatt's Avatar
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    #4

    Re: Cold running 250 ProXS (taeheel2az)

    Thanks guys, never found any trash but pulled poppet and checked it. Cranked on ears, and it warmed up like its supposed to. Will lake test it tomorrow.

  5. Mercury 3L/4 Stroke/Verado Moderator EuropeanAM's Avatar
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    #5

    Re: Cold running 250 ProXS (PumaMatt)

    Did you check to ensure that the poppet slid in and out FREELY in it's seat?

    Sometimes... swelling/distortion in the poppet or grommet can cause is to hang "slightly open" (this results in lowered water pressure at idle, and a cold-running engine at idle- or in severe cases, overheating at idle).




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  6. Banned
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    #6

    Re: Cold running 250 ProXS (EuropeanAM)

    All it takes is a hair thin piece of wood/debris to foul the thermostats...thus keeping them open and preventing the outboard to come up to temp. Glad you caught it as this is how most folks blow em up!!

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