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  1. #1
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    Mar 2009
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    Rochester
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    2008 Optimax fuel filter

    I want to change my Fuel/water seperator myself this year on my 2008 150 optimax. Can someone give my an idea on how to do it? Thanks,
    Steve

  2. Mercury 3L/4 Stroke/Verado Moderator EuropeanAM's Avatar
    Join Date
    Apr 2008
    Location
    Greenville, SC (US)
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    98,378
    #2

    Re: 2008 Optimax fuel filter (nydear)

    Disconnect the water in fuel sensor wire from the bottom of the filter.

    Unscrew the filter (counterclockwise, as viewed from BELOW the filter), and pour the contents into a glass jar for inspection.

    New filter is Part# 18458T4 (or 18458Q4). Lubricate seal of new filter with 2-4-C Grease, OR vaseline (MUST be a fuel-soluable grease). Be sure you install the new sensor into the filter BEFORE installing filter.

    Install filter until seal contacts, then turn 1/2 turn CLOCKWISE (tighter).

    Reinstall water in fuel sensor wire.

    Pump primer bulb until firm.

    This is a SMALL PORTION of your annual maintenance. See the following post:

    http://www.bbcboards.net/zerot...gines




    Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
    Still consider myself a "Marine Apprentice" after 48 years (learn something new every day).
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