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  1. #1
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    Replacing Water Separating Filter on Optimax

    Don,

    I was looking to replace my water separating filter on my 03 225 Opti. Would you mind walking me through this procedure? Also if you give me a price quote on the parts I would need it would be much appreciated.

    Thanks,
    Nick


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  3. Mercury 3L/4 Stroke/Verado Moderator EuropeanAM's Avatar
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    #2

    Re: Replacing Water Separating Filter on Optimax (bigbasser54)

    Quote Originally Posted by bigbasser54
    Don,

    I was looking to replace my water separating filter on my 03 225 Opti. Would you mind walking me through this procedure? Also if you give me a price quote on the parts I would need it would be much appreciated.

    Thanks,
    Nick
    -Remove cowling

    -With a flatblade screwdriver, CAREFULLY separate the TPS link arm from the TPS (you're disconnecting the ball and socket joint at the TPS). Set the arm out of the way.

    -Utilizing a 896661 Filter Removal Tool (or as an alternative, a screwdriver through the plastic tabs... be careful they can break), unscrew the filter COUNTER CLOCKWISE while looking from the TOP of the VST and remove the filter.

    RedCapFilterTool.jpg

    -With a bright flashlight, look down inside the chamber. You'll need to drain any water present, and clean out any debris which might be sitting at the bottom. If you need to drain the chamber, use the "u-shaped" hose that's provided at the bottom. To drain, look at the FRONT/BOTTOM of the VST for an ALLEN SCREW or FLAT-SCREWDRIVER DRAIN SCREW (loosen screw several turns to allow draining). Retighten drain screw when finished.

    -Lightly lubricate BOTH o-rings on a NEW 8M0060041 filter with 2-4-C (or petroleum jelly/vaseline if 2-4-C is not available). Clean off any excess that is outside the o-ring area.

    RedCapFilter.jpg

    -Install filter... turn it CLOCKWISE until firmly seated.

    -Using TWO FINGERS (or as an alternative, a pair of pliers), squeeze the ball and socket joint for the TPS link arm back together. Be careful not to "pry against" the TPS itself... this can damage the TPS unit (hence the recommendation of two fingers or a pair of pliers to squeeze it together).

    -Pump the primer bulb until it's FIRM.

    -Verify no fuel leaks present at VST or filter.

    -Project Complete.

    This post has been added to the "Commonly Used Sticky" at the top of the forum for "future reference".

    PS: You've got an IM.
    Last edited by EuropeanAM; 05-31-2014 at 11:45 AM. Reason: Photos, Courtesy of "Ed R" :)


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  4. Member Kenny3Times's Avatar
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    #3

    Re: Replacing Water Separating Filter on Optimax (EuropeanAM)

    <table width="90%" cellspacing=0 cellpadding=0 align=center><tr><td>Quote, originally posted by EuropeanAM &raquo;</td></tr><tr><td class="quote">

    -Lightly lubricate BOTH o-rings on a NEW 8M0020349 filter with 2-4-C (or petroleum jelly/vaseline if 2-4-C is not available). Clean off any excess that is outside the o-ring area.


    </td></tr></table>

    Is the same filter used for a 2005 Pro XS serial:1B162522? How do I identify the TPS (where is it).

    Should this process be done prior to putting it away for the winter or can it be done in the spring? I am storing in a heated garage.

    Also, could you send me a PM with the price for this?


    Thanks,
    Kent

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

    Re: Replacing Water Separating Filter on Optimax (kent7351)

    Same filter- same proceedure.

    If you were to loosen the filter.... and attempt to lift it out of the housing, you would be prevented from doing so by a metal linkage located directly above the filter. This linkage attaches at the "rear" or aft end to a black, square device.

    That black, square device is the TPS.



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    #5

    Re: Replacing Water Separating Filter on Optimax (EuropeanAM)

    I'm confused.

    Read in another post Don said Mercury does not recommend water separators as they may affect fuel flow.

    I was going to have a water separator installed on my new rig but based on that did not.


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

    Re: Replacing Water Separating Filter on Optimax (Tennessee Top)

    <table width="90%" cellspacing=0 cellpadding=0 align=center><tr><td>Quote, originally posted by Tennessee Top &raquo;</td></tr><tr><td class="quote">I'm confused.

    Read in another post Don said Mercury does not recommend water separators as they may affect fuel flow.

    I was going to have a water separator installed on my new rig but based on that did not.

    </td></tr></table>

    Mercury does not recommend the installation of ADDITIONAL filters.

    According to Mercury: "Your engine is already equipped with an adequate level of filtration".

    In your case.... there is a water separating filter UNDERNEATH the engine cowling. Yours, however, is different from the type described in this post.



    Dual Mercury Master Technician- for Mercury Outboards, Racing & Mercruiser Sterndrives in Greenville, SC.
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  8. Member Kenny3Times's Avatar
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    #7

    Re: Replacing Water Separating Filter on Optimax (EuropeanAM)

    Just got around to replacing mine last night. Thanks for posting the instrucitons, it was a very easy project with your instructions. Also thanks Don for reccomending the 896661 Filter Removal Tool, it would have been a major headache without it.

    The only step I didn't follow was the part about draining the water so I just sucked it out of there with a turkey baster

    Thanks!

    Kent

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    #8
    Ok so i did this but i took the 3 5/16 bolts out to move the arm blocking the fuel filter from coming out. Took boat out doesnt run smooth, also if i give it more than say half throttle it starts a continuous beep. Was it something i did wrong or?

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    #9
    You may have ..didn't read take out 3 bolts ...but to use a screw driver and remove TPS link arm from the TPS housing .

  11. Member Nova Kaw 650's Avatar
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    #10
    Quote Originally Posted by Jdub75803 View Post
    Ok so i did this but i took the 3 5/16 bolts out to move the arm blocking the fuel filter from coming out. Took boat out doesnt run smooth, also if i give it more than say half throttle it starts a continuous beep. Was it something i did wrong or?
    Not an outboard tech, but...... the motor was running good before the filter change?
    Check carefully for fuel leaks around the filter.
    Did the TPS (thing held on with the three bolts) have adjustment slots, or anything that would allow it to not have gone back in exactly the same position?
    A wire or plug to the TPS hasn't come undone?
    Scott

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  12. Mercury 3L/4 Stroke/Verado Moderator EuropeanAM's Avatar
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    #11
    I'm going to guess one of the following:

    -Shards or shreds of old filter dropped in housing

    -TPS link arm not properly installed

    -Pulse hose kinked over behind VST (or completely disconnected).

    NO NEED to remove bolts from the VST during filter replacement.


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    #12
    Quote Originally Posted by Jdub75803 View Post
    Ok so i did this but i took the 3 5/16 bolts out to move the arm blocking the fuel filter from coming out. Took boat out doesnt run smooth, also if i give it more than say half throttle it starts a continuous beep. Was it something i did wrong or?
    I did these same steps, based upon a youtube video I watched before hand. I ended up with the same problems, rough slow idle and steady beep at anything past 3000 rpm. I tried taking the TPS off and making sure it was connected properly. Not much luck so far. Wish I had known that the black box was a sensor before hand.

  14. BBC SPONSOR / Moderator Triton Chris's Avatar
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    #13
    Don do you have part number for this same filter on a 2008 250 Pro XS?
    .
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  16. Mercury 3L/4 Stroke/Verado Moderator EuropeanAM's Avatar
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    #15
    +1... that's a good reference for Parts Ordering or Lookup of parts by Engine Serial Number. Filter is located in the Vapor Separator Section of the Parts Catalog.

    8M0060041 is the Part Number for the "Red-Capped" VST Water Separating Filter.

    You would also be wise to purchase Part# 896661 Tool (to remove and re-install the filter).

    NEVER remove the screws for the TPS simply to replace the filter.

    And strongly recommend AGAINST using "Tube" videos for service techniques... many of them are RIDDLED with errors, such as this, by well-meaning "DIY'ers" or "mechanics".


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  17. Member BOW4UM's Avatar
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    #16
    Get the tool. My filter cracked and was a mess getting out. The tool is cheap and works great and you will use it every year :)
    James / 2008 ChampioN 198 / 225 Opti PROxs!
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