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1989 Mercury 8 horse to 9.9 horse conversion

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  • 1989 Mercury 8 horse to 9.9 horse conversion

    I was told the the 8 horse and the 9.9 horse engine were the same except for the carb and the prop.
    I would think I would need to change the magneto advance curve too.
    What do I really need to make this 8 horse engine into the 9.9.
    Is this doable?

    Thanks,

    Chuck
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