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  1. 06-13-2018, 08:40 PM #1
    Dan21XRS
    Dan21XRS is offline
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    Cracked cylinder head...

    SN 1B918018

    I have a 2103 250 Pro XS that had a crack on or near #4 cylinder... What would cause this??? Had it replace under warranty this week... Just wondering... Dan
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  2. Gamblinman
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    #2 06-13-2018, 09:13 PM
    Casting flaw
    Core shift
    Incorrectly torqued head bolts.
    Could have been a foreign object between head and block when assembled.

    I believe Mercury had this problem in earlier models, but had since revised.
    "Better to remain silent and be thought a fool than to speak out and remove all doubt."
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  3. Savage
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    #3 06-14-2018, 01:44 AM
    Fuel rails not torqued properly.


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