Mercruiser III Installation

Discussion in 'Sterndrives' started by malvena, Aug 11, 2012.

  1. malvena
    Joined: Aug 2012
    Posts: 1
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: Vancouver,B.C.

    malvena New Member

    Hi All, new to this site, hope someone can help. I am converting my 34' cruiser
    from shaft drive to stern drive. I am using the old-big Mercruiser III,the one with
    1 1/2" shafts and swings a 20" prop. The drive is 25 1/2" C/L of input shaft tp
    C/L of prop shaft. Can anyone advise me as to the height the cav plate or prop
    should be above or below the hull btm? I am redy to make the transom cutout.
  2. IMP-ish
    Joined: Jan 2011
    Posts: 389
    Likes: 9, Points: 18, Legacy Rep: 150
    Location: united states of america

    IMP-ish powerboater

    1 person likes this.
  3. powerabout
    Joined: Nov 2007
    Posts: 2,944
    Likes: 67, Points: 48, Legacy Rep: 719
    Location: Melbourne/Singapore/Italy

    powerabout Senior Member

    just treat it like any other std drive
    34 ' boat with one drive would want to be levelish.
    How heavy and how fast do you think it will go?
    Make sure you have enough transom angle
    Any old dealer should have his OEM manual showing the x dimensions for that package
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