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  1. #1
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    May 2009
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    Thibodaux, Louisiana
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    Do I have to break in my new lower unit?

    Got a new lower unit on the 250 pro xs. Do I need to break it in, and if so how?

  2. Member
    Join Date
    Mar 2005
    Location
    Wilkesboro, NC
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    866
    #2

    Re: Do I have to break in my new lower unit? (hookem175)

    Yes!
    I just had Don rebuild mine last month and he said for the first hour nothing above 5000 rpms and to vary the rpms even if its only by 200-300. Also take off gradually dont just hammer down the first couple of times and be sure to shift from foward to neutral and neutral to reverse at least ten times each trip. Then after the first hour short burst over 5000 but dont hold it there more than a few minutes. After 3 hours let it eat
    Don if this isnt right please correct me.

  3. Member
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    Sep 2009
    Location
    Lawrenceburg, Ky
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    1,774
    #3

    Re: Do I have to break in my new lower unit? (99jav)

    I would say also to keep trimmed down for that first hour also. Only trim it high enough to be able to control the boat safetly.



  4. Member
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    May 2009
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    Thibodaux, Louisiana
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    #4

    Re: Do I have to break in my new lower unit? (transamz9)

    K. Thanks guys.

  5. Mercury 3L/4 Stroke/Verado Moderator EuropeanAM's Avatar
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    Apr 2008
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    Greenville, SC (US)
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    98,243
    #5

    Re: Do I have to break in my new lower unit? (99jav)

    <table width="90%" cellspacing=0 cellpadding=0 align=center><tr><td>Quote, originally posted by 99jav &raquo;</td></tr><tr><td class="quote">Yes!
    I just had Don rebuild mine last month and he said for the first hour nothing above 5000 rpms and to vary the rpms even if its only by 200-300. Also take off gradually dont just hammer down the first couple of times and be sure to shift from foward to neutral and neutral to reverse at least ten times each trip. Then after the first hour short burst over 5000 but dont hold it there more than a few minutes. After 3 hours let it eat
    Don if this isnt right please correct me.</td></tr></table>

    +1

    Don't forget to change the gear lube at 20 hours.



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