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  1. #1
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    Lower unit leaking oil

    I came out in the garage today to see a small puddle of oil underneath the prop. I had to replace the lower unit two years ago. It didn't run funny or weird yesterday. Do you think it is a bad seal? How bad do you think it is? Thanks.

  2. 1/2 of ' team catfish ' ol man river's Avatar
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    #2

    Re: Lower unit leaking oil (JJS)

    any leaking oil is NOT GOOD

    pull the prop, and look to see if there is some monofilament line ( or anything else) wedged under the propshaft seal. mono will wind around the shaft, melt, and push up on the seal, creating a leak....

  3. Member
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    #3

    Re: Lower unit leaking oil (JJS)

    I did that last week. I usually check it about once a month. I am going to pull the prop off in a minute and get a better look at it.

  4. Member
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    #4

    Re: Lower unit leaking oil (JJS)

    Im sure its nothing, just wipe it up and dont even think about it...................KIDDING!!!!!

  5. Member
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    #5

    Re: Lower unit leaking oil (blckshp55)

    I pulled the prop off. No line or anything wrapped. Looks like it is leaking from the back of the housing. It is not leaking much. I cleaned it up and checked it an hour later, wasn't any new oil there. I will be calling Junior @ Pitstop in the am.

  6. Mercury 3L/4 Stroke/Verado Moderator EuropeanAM's Avatar
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    #6

    Re: Lower unit leaking oil (JJS)

    Be sure to have the gearcase DRAINED- inspect fluid for WATER or METAL FRAGMENTS.

    Gearcase should be PRESSURE TESTED to check for leaks. In your case.... include a test at 14 psi, while checking for leaks around the propshaft seals (with soapy water in a spray bottle).

    Could simply be an INNER propshaft seal failure.



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  7. Member
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    #7

    Re: Lower unit leaking oil (EuropeanAM)

    That is what it looks like. I noticed oil around the base of the propshaft today. It will be in the shop next monday. Hopefully a easy fix. Thanks for the help everyone.

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