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Repower...going to change upper- which ratio?

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  • Repower...going to change upper- which ratio?

    Hi - I have a 1992 18.5' boat with a 3.0LX/Gen II
    It currently runs 36mph at WOT speed of 4500rpm with a 17P aluminum 3 blade prop.

    I am going to put in a 185HP V6 (MR185 3.8/229 4 BBL) that I have here.

    Which ratio drive would I want to buy? 1.62 or 1.81?
    thanks!

  • #2
    You would need the 1.81 ratio.

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