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  1. #1

    Merc fuel water separator question?

    Had a water separator/ fuel filter system put in my boat, am not happy about it as it is 25 microns were as my last boat was 10 micron system, can I just replace Merc filter with a 10 micron filter or a Yamaha filter? This is for a 2004 Opti 115.

  2. Member
    Join Date
    Jun 2013
    Location
    LONGVIEW TEXAS
    Posts
    14,015
    #2
    water Seperators or other filters inline between tank and engine are not recommended for these engines , serial number needed for more info please
    .................................................. ...the scariest thing in life is the unknown ...................................

  3. Mercury 3L/4 Stroke/Verado Moderator EuropeanAM's Avatar
    Join Date
    Apr 2008
    Location
    Greenville, SC (US)
    Posts
    95,178
    #3
    +1

    NO additional filters should be added as they can introduce a fuel supply restriction.


    Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
    Still consider myself a "Marine Apprentice" after 47 years (learn something new every day).
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  4. #4
    Thanks.