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Prop sizing 60hp Mariner

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  • Prop sizing 60hp Mariner

    Guys, I trying to guess the best size prop for my boat, I believe to do this I need to know the WOT RPMs of the outboard (96 2 stroke 60hp Mariner) and then the current operating limits. The 2 issues I have is I dont know the WOT of this engine and I dont have a rpm gauge in the boat. I'm sure I can get info on the WOT but there dont seem to be many 2 stroke tachometer gauges for sale. Has anyone done this exercise before, I'm I going about this the wrong way, is there a better way? Up for all suggestions. The reason for doing this is I believe the boat to be a bit sluggish out of the gates. The boat is a 16ft model 500 Driver.

  • #2
    Iboats has a couple of tachs available.
    The only way to prop correctly is to know your max rpm's and speed with gps.

    https://www.iboats.com/shop/boat-mot...st_order=price
    1980 Sylvan Aluminum 18' Sportster I/O - Mercruiser 140, Honda 7.5 Kicker, Bennett M120 Tabs
    1974 Glastron V-179, Mercruiser 140
    1984 16.5ft. Alumarine Sealark side console with 82 Merc 50
    Manitoba, Canada

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    • #3
      Google Tiny Tach.
      they're for testing
      "Success is walking from failure to failure with no loss of enthusiasm." - Winston Churchill

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      • #4
        Thanks, I've purchased one (very similar to the tiny tach). Can anyone confirm a figure of 5500 RPM bring the WOT figure for this outboard

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        • #5
          If it's a 3 cyl. it's 5000-5500.
          http://boatinfo.no/lib/mercury/manua...-55-60.html#/0
          1980 Sylvan Aluminum 18' Sportster I/O - Mercruiser 140, Honda 7.5 Kicker, Bennett M120 Tabs
          1974 Glastron V-179, Mercruiser 140
          1984 16.5ft. Alumarine Sealark side console with 82 Merc 50
          Manitoba, Canada

          Comment


          • #6
            Sign up today
            Thanks guys much appreciated

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