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  1. 08-02-2021, 06:14 AM #1
    mtdrop
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    Strange oil leak

    Serial number 1b904110
    Pro XS 225 201

    oil is coming from the treaded hole. What would cause or what do I need to worry about other than getting it to the shop.
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  2. JOE54
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    #2 08-02-2021, 08:01 AM
    most likely have a leaking hose on compressor or there is a fitting under the comp that screws into top of block follow small hose with flash light , oil looks green needs to be brown
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  3. mtdrop
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    #3 08-02-2021, 09:12 AM
    Thanks will check that out too…
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  4. 06 SB
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    #4 08-02-2021, 10:58 AM
    What oil do you use?

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  5. mtdrop
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    #5 08-02-2021, 12:05 PM
    Premium plus
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  6. EuropeanAM
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    #6 08-02-2021, 02:41 PM
    Recommended is Optimax/DFI oil (which incidentally is easy to chase down when there's a leak as it shows up nicely under UV detection light).

    See if you can get a slightly wider angle (at a little higher resolution) picture so as to reference that area better.


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  7. mtdrop
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    #7 08-02-2021, 06:58 PM
    Will try Don it's in port side next to the fuel filter but towards the rear but on the port head
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  8. EuropeanAM
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    #8 08-02-2021, 07:18 PM


    Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
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  9. JOE54
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    #9 08-03-2021, 06:55 AM
    well that hole looks too me like its on BLOCK not head directly below oil return line on compressor and viewed in between high psi output hose and vent hose on vst , too far forward to be on head that has no holes on side
    .................................................. ...the scariest thing in life is the unknown ...................................
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