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Oil leaking from out drive water intake

Discussion in 'Technical Stuff' started by Tin Diesel, Dec 15, 2017.

  1. Tin Diesel

    Tin Diesel Member

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    I'm new to power boat ownership having just bought my brother's 2007 2575 RL I/O. It has a Mercruiser 5.0L Alpha.

    The engine only has 100 hours on it, but for the last three years was hardly used (my brother passed last year) . My sister-in-law says it hasn't been started since last spring, although it got regular spring/fall maintenance and winterizing.

    In November we took it on a 20-minute spin before putting it on the trailer to bring it down to Houston. It ran OK.

    We've had it in storage for the last month. When I picked it up yesterday I saw this oil leaking out of the water intake on the sterndrive on both sides. I'd appreciate comments and information as to what this means. See attached picture.

    20171215_082658.jpg
     
  2. myv10

    myv10 Well-Known Member

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    You most likely have a bad seal in the lower unit. the lower unit is fairly easy to remove, if you are a do it yourselfer, change the water pump while you have it apart. If you don't want to change it yourself you could remove the lower unit and take it to a shop. Go on utube and you will see the removal process .
     
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  3. cwag911

    cwag911 Moderator

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    +! on redoing the lower unit seals and water pump.
     
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  4. Tin Diesel

    Tin Diesel Member

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    I'm curious... why the water pump also?
    (thanks for the help, by the way)
     
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  5. cwag911

    cwag911 Moderator

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    Because you will have the lower unit removed and the boat is 10 years old. I do our water pump every 5 years regardless of use. You just do everything while it's off and start fresh. It's not that expensive.
     
  6. mattb

    mattb Well-Known Member

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    Agreed, I did mine when we had our i/o, it had the same leak, pretty common. Not hard at all if your mechanically inclined. Watch your shift shaft and speedo tubing if it's internal. A bench vise comes in handy to hold it while your working on it. Watch videos, get a manual.
     
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  7. Tin Diesel

    Tin Diesel Member

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    Thanks for your help. Found a great little Merc shop near us. They said all the seals in the stern drive were dried out and crumbling. Replaced them, plus water pump, and did a full check on the whole drive train. Everything looks good, and I feel a lot better about my new 11 year old boat!
     

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