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Inspection port o-rings  Bottom

  • I need to replace the o-rings on my Nacra. I've measured the inspection ports (there's ten of them!) and they are 4.5" in diameter. About half are Viking, and the rest are a look alike. Thing is, my google searches only turn up 4" or 5" Viking o-rings. What's the deal?

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    Tom
    Hobie Getaway, Nacra 5.5, Hobie Tiger
    Wish list: A-cat classic, F16 Viper!
    Northern California
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    Edited by topcat16 on Apr 01, 2015 - 02:28 PM.
  • sierracatI need to replace the o-rings on my Nacra. I've measured the inspection ports (there's ten of them!)

    Wait, you have ten 4 1/2 inch pots? Five in each hull? That seems like a lot.

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    Damon Linkous
    1992 Hobie 18
    Memphis, TN

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  • What exactly are you measuring? I suggest you go to murrays.com and search on access ports. They have a sizing chart which shows you some of the dimensions for the various ports. For example, the top of the lid on a 4" port is actually 4.5" diameter. The opening in the port is 4" diameter.

    sm
  • Yes, I have 10 ports, is quite ridiculous. Six on the port side and four on the starboard side. I'm guessing someone needed a lot of access for repairs, although I can't see evidence of repairs.

    I am measuring the o-ring itself, and the recess the o-ring sits in. Definitely 4.5"

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    Tom
    Hobie Getaway, Nacra 5.5, Hobie Tiger
    Wish list: A-cat classic, F16 Viper!
    Northern California
    --
  • If you have odd-size o-rings, you might try an industrial supplier like this :

    http://www.mcmaster.com/#o-rings/=wm0q2c

    If you scroll down, you'll see they even have o-ring cord, which you just cut to length, and glue the ends together with super glue - It works icon_biggrin

    Tom
  • +1 on the mcmaster suggestion

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    Cesar (Cez) S.
    Hobie 16 (had a few)
    Nacra 5.2 "Hull Yeah"
    Vectorworks XJ - A class (not named yet)
    West Michigan (Grand Rapids/Holland Area)
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