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  1. #1
    Member
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    Jun 2020
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    Othello, WA
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    2006 mercury 75 efi conversion to 115

    i know its been talked about and iv gone thru many sites
    and forums. But I haven't seen any recent talk about converting a 75 mercury into a 115. I know Simon sports used to reflash the ecm but i called and they said they don't do that anymore. anybody got new information? Anybody have experience refreshing their ecm or know where it can be done now?

  2. Member
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    May 2011
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    Spangle, WA
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    #2
    Wrong forum, your engine goes here - Mercury Motors
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    '09 Hewescraft ProV
    '09 150 Optimax


  3. Member
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    Mar 2018
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    Ashland city tn
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    171
    #3
    U cant get a 115 from a 75 by just ecm. Theres porting difference and that's where most that hp comes from

  4. Member
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    Jun 2013
    Location
    LONGVIEW TEXAS
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    13,938
    #4
    ser number OT801000 and above 90/115/125/and 115 pxs use same powerhead 75 is different
    .................................................. ...the scariest thing in life is the unknown ...................................

  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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    94,941
    #5
    There were some other subtle differences as well.

    Duplicate thread.


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