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1978 233 Inboard, Keel Drive - Prop Size?

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  • 1978 233 Inboard, Keel Drive - Prop Size?

    Hey All,

    Need a new prop for my 78 inboard Merc 350 Mako 23 (may not be 233, that's just the placard that is on it) Center console.

    I am not sure what was on it before, but I could only top out around 22 knots on the ocean (even calm bay.)

    Any recommendations on correct size?

    Thanks!

  • #2
    I run a 16R15 nibril prop on mine; I have a 1.5:1 transmission.

    That puts me right at the engine redline at WOT doing ~30 knots.
    [br]DonK[br]Boca Raton, FL[br]1979 236IB: \'The Fish Tank\'[br]1979 Backcountry 18 \'Boner\'[br]<>< <>< <>< <>< ><> J[br]Redneck Troubleshooting:[br]1) If it moves, but ain\'t supposed to, use Duct Tape[br]2) If it don\'t move, but supposed to, use WD40[br]3) If that don\'t fix it, it\'s electrical![br]

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    • #3
      This thread will help if you have a 1:1 instead of the 1.5:1

      http://classicmako.com/forum/topic.a...78&whichpage=1
      [br]***[br]\'82 Ski Nautique - Lake Martin, AL[br]\'80 236IB - Lake Martin, AL[br]\'03 Pursuit 2670 - Destin, FL

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