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  1. #1

    Default 2007 outback leak drive shaft

    I just bought this boat and after 2 hours of using it the boat started to fill with water in engine campartment. After using the bilge pump i was able to drain the water. Is it normal for water to leak between the red hose and white plastic?
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  2. #2
    Join Date
    Oct 2013
    Ft. Collins, CO


    Yes it is normal but probably at much less of a leak than you are seeing. Drive shaft seals use a "stuffing box" type of seal. The basic idea is that you coil a waxy cord around the drive shaft and then clamp it to seal it off. You could over-tighten the seal and it wouldn't leak but this would generate excessive friction and heat build up, which could be catastrophic. So you need it to leak a little. Ideally, this should be a drip - but that wouldn't really fill your bilge. It's OK-ish to have them leak more than that as long as your bilge pump works. (Mine leaked pretty badly and I just appreciated having such a clean bilge since it was always getting flushed)

    As the seals age, they leak more. Depending on how old the seal is, you may be able to simply tighten the nuts a bit to slow the leak. The proper solution is to repack the stuffing box which isn't a difficult or expensive task.

    Edit: I just realized that 2007 was when some/all of the Moombas started using the newer dripless seal. I'm not sure which you have. I believe that once they start to leak at all, you will need to replace it (the seal - not the boat)
    Last edited by gregski; 04-07-2014 at 02:47 AM.
    2007 Mobius LSV
    1989 Sanger Skier DX - sold

  3. #3
    Join Date
    Oct 2008
    Central, Arkansas


    Quote Originally Posted by Josephswindle2013 View Post
    Is it normal for water to leak between the red hose and white plastic?
    You have a dripless setup, should not have any water dripping from it in the boat. Try to tighten the clamps and see if that helps, if not you might need to look at getting repaired/replaced.

  4. #4
    Join Date
    Jul 2002
    London Ontario Canada


    No. When it fails it will leak between the white plastic and the blue cover. The blue cover is just a boot and does not do anything. It will leak at the seal and the shaft or the white plastic and the seal if the white plastic gets overheated by the cooling water if it's exhaust water
    09 21v LAUNCH

    99 Outback LS. Sold

    run your engine after you change your oil
    68 th Member. WS420,HSE Revolution, OJ 466, Acme1157,1100 sacs,Kicker HLCD's n IX500.4, Supra Coolies

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