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  1. #1

    Help- size for o-ring of steering piston 1965 41C

    I am looking for anyone who had to replace the Orings of the steering piston of a 1965 41DC.

    The old rings are about 1 3/8 ID, but when in place, they seem to be a very lose. it looks like they are 1/8 thick, but the it looks like they should be 1/4 thick, as the grove on the piston is slightly wider than 1/8.

    My questions: Should these o rings be oversized (1/4 thick vs 1/8)?
    Should the o ring be slightly loose (easily wiggles) when in place or should it be very snug? (1 5/16 is really tight and 1 3/8 is slightly wiggly)
    Akin Tosyali
    Hatteras 41 -Barbaros

    Chicago

    Barbaros, Hatteras 41' Before and after restoration

  2. #2

    Re: Help- size for o-ring of steering piston 1965 41C

    Is it a hynautic ram?

    I'd buy the kit. the size and shape type of oring matters. Also the materials it's made of.
    Scott
    41C117 "Hattatude"
    Port Canaveral Florida.


    Marine Electronics and Electrical Products Distributor.

  3. #3

    Re: Help- size for o-ring of steering piston 1965 41C

    I replaced the helm pump and with a seastar hydraulic pump, and got rid of the hynautic reservoir. There are no brand/ model markings on the steering cylinder at the back by the rudders.
    Akin Tosyali
    Hatteras 41 -Barbaros

    Chicago

    Barbaros, Hatteras 41' Before and after restoration

  4. #4

    Re: Help- size for o-ring of steering piston 1965 41C

    Quote Originally Posted by akintosyali View Post
    I replaced the helm pump and with a seastar hydraulic pump, and got rid of the hynautic reservoir. There are no brand/ model markings on the steering cylinder at the back by the rudders.
    Then take it to any hydraulic shop.
    Semper Siesta
    Robert Clarkson
    ASLAN, 1983 55C #343
    Charleston, SC

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