A strange question

Discussion in 'Props' started by BertKu, Dec 29, 2020.

  1. BertKu
    Joined: May 2009
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    Location: South Africa Little Brak River

    BertKu Senior Member

    Hi Gonzo,
    This is what it looks like from the top. What I will do, is to remove the front, seal the input shaft/gearbox and drop it again in the water. Then we know whether it is the seals or the gearbox. I will still replace the seals and buy new ones. Gearbox1.jpg
     
  2. BertKu
    Joined: May 2009
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    Location: South Africa Little Brak River

    BertKu Senior Member

    This is how I have the seals and bearing and rubber sheet between gearbox and bearing holder. According to me it is in the right way.

    front=bearing-holder.jpg
     
  3. gonzo
    Joined: Aug 2002
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    Location: Milwaukee, WI

    gonzo Senior Member

    You can get seals with stainless springs. Look at the ones used on the shafts of outboards.
     
  4. BertKu
    Joined: May 2009
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    Location: South Africa Little Brak River

    BertKu Senior Member

    Thanks you Gonzo, but for where I am living, it is not so easy to get those at the size I need. But I will still try to get them. But in the meantime I have tested the seals and they do not leak, thus if I don't get those ones with a SS springs, it is not a problem, I use the ones I have.
     
  5. BertKu
    Joined: May 2009
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    Location: South Africa Little Brak River

    BertKu Senior Member

    Although I have been using 140 bolts and nuts with marine silicone on one of those 2 gearboxes. It leaks like anything. My only solution is to use CT1 , a silicone I trust. If that does not help, I have then a real problem. What else could I consider? refer previous 2 photos. Making a gasket? , but I thought that the rubber would do the sealing like a normal gasket.
     
  6. gonzo
    Joined: Aug 2002
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    Location: Milwaukee, WI

    gonzo Senior Member

    If it is leaking through the gasket, the sheet metal is probably deforming. That was a usual source of leaks on valve covers and oil pans when they were made of sheet metal. The solution was to add a flat bar along the perimeter as a washer to keep the surfaces flat.
     
  7. BertKu
    Joined: May 2009
    Posts: 2,521
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    Location: South Africa Little Brak River

    BertKu Senior Member

    Thanks Gonzo, indeed you are right, I did not expected to deforming over that short distance between the 2 bolts with nuts. Grave mistake from me. Have a look at Google : CT1 sealant and look at you tube various CT adverts That will be my way to resolve it without major modifications. Apparently the marine silicone I bought does not seem to do the job. I personally am very fond of CT1, my only problem is that I cannot purchase it in my country. Even via Amazon. Thus every time I visit Europe I buy a few of those tubes.
     
  8. BertKu
    Joined: May 2009
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    Location: South Africa Little Brak River

    BertKu Senior Member

    Don't laugh, but when I went to the Bolt and Nut center, this lovely young beautiful lady told me: " Why don't you use those nice looking round head with 6 side small allen key. Less drag" I fell for it and used them, the problem was that by tighten the bolts, the allen started to strip and none of the bolts are really very tight. I came to the conclusion that either I have to find a way to tighten them properly , or use old fashion sixt side heads. That little bit of drag is not really a problem. Thanks Gonzo, I will still use CT1, with better bolts.
     

  9. gonzo
    Joined: Aug 2002
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    Location: Milwaukee, WI

    gonzo Senior Member

    That's a funny story.
     
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