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290 DP Oil Leak-gctid817593

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    290 DP Oil Leak-gctid817593

    Can someone please help identify the potential sources for this outdrive leak so I can begin researching what it is going to take to stop it? Tough to see because it is brand new oil but i have a slow leak from behind the inner prop. Thanks.


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    #2
    If yours is like mine there are two seals outside the outer prop shaft (that drives the forward propeller) that are the most likely suspects given where you see the leak. The seals are right next to each other. It's my understanding that one seal keeps the water out, and the other seal keeps the oil in (like they face different directions). I don't know if you can just pop the prop shafts out and replace the seals or not...

    Mine was leaking and I had water in the out drive. When they took it apart they said the lower unit was in pretty bad shape, so I replaced it ($$ouch$$).

    I can't find a reference to the seals in this manual (I found it in my Clymer's) but it might help and maybe I didn't look long enough:

    http://www.marinesurveyorontario.com...p%20manual.pdf
    1985 Bayliner Ciera 2750
    300HP Volvo Penta 5.7 with DP-A drive

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      #3
      Best thing to do would be to do a pressure test.

      Drain the oil and using a pressure tester. When pressured up you can spray it with soap and water to find exactly where your leak is.
      Pat. Sandpoint Ida
      I NEED ANOTHER BOAT!!

      Comment


        #4
        I just now responded to your thread over at ME.com. I included an image of my puller tool that you may need.

        A few things to add;

        ..... use only Volvo Penta OEM parts for this.

        ..... I would not use grease while installing the new seals. Instead, install them using Quicksilver "Perfect Seal".

        ..... I would also replace the eccentric piston seal and housing O-ring.

        .

        Rick E. Gresham, Oregon
        2850 Bounty Sedan Flybridge model
        Twin 280 HP 5.7's w/ Closed Cooling
        Volvo Penta DuoProp Drives
        Kohler 4 CZ Gen Set

        Comment


          #5
          "2850Bounty" post=817727 wrote:
          [color]blue wrote:
          I just now responded to your thread over at ME.com. I included an image of my puller tool that you may need.

          A few things to add;

          ..... use only Volvo Penta OEM parts for this.

          ..... I would not use grease while installing the new seals. Instead, install them using Quicksilver "Perfect Seal".

          ..... I would also replace the eccentric piston seal and housing O-ring.

          .[/color]
          Thanks Rick. I will read it over on the other forum and reply with questions I may have. Sure wish you were on the East Coast.

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