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  1. #1
    Member
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    Oct 2016
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    Wake Forest, NC
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    Question Need help to I’d replacement part…PLEASE!!!

    I have an overheating issue on my 175L Pro XS OptiMax (model number 1175P73EY), (serial number 2B121880).

    I want to replace the following parts to see if I can resolve the issue.
    - Poppet Valve
    - Thermostat’s
    - Any corresponding gaskets for these parts.

    I don’t know where to search/find the needed parts.

    Help Please, if you have the time.
    TIA

  2. Mercury 3L/4 Stroke/Verado Moderator EuropeanAM's Avatar
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    Apr 2008
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    #2
    ALWAYS, ALWAYS start AT THE SOURCE: The Water Pump!

    96148A8.

    Moving your post to the CORRECT (2.5L) forum.


    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).
    Mercury Parts, Mercury Outboards, Smartcraft & Accessories, Injector Service, TDR Reeds- BBC Sponsor

  3. Member
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    Oct 2016
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    Wake Forest, NC
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    #3
    BP serviced the motor last Oct and installed a new impeller…this has been going on for some time…lots of $$ going out but NO resolution!

  4. Member
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    Jun 2013
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    LONGVIEW TEXAS
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    #4
    redo their work again to be sure its right replace all 3 gaskets and impeller make sure seal is in top housing for copper tube and oriented correctly , plastic part goes in first , be surprised how many so called tech cant do a water pump correctly , seen this many times
    .................................................. ...the scariest thing in life is the unknown ...................................

  5. Member
    Join Date
    May 2011
    Location
    Spangle, WA
    Posts
    6,548
    #5
    Here's the correct way to service the 2.5L Optimax water pump, step by step, with pictures - Water Pump Replacement

    The FAQ sections at the top of this and the 3L forum are chock full of helpful topics and info to keep your Optimax happy.
    _______

    Phil
    '09 Hewescraft ProV
    '09 150 Optimax


  6. Member 06 SB's Avatar
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    Feb 2012
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    West Point Lake, GA
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    11,134
    #6
    Didn’t you just have a thread about this where the alarm is not a steady tone but a series of beeps?

    USN Retired
    2020 Basscat Caracal
    2020 Mercury 225 ProXS 4s



  7. Mercury 3L/4 Stroke/Verado Moderator EuropeanAM's Avatar
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    97,984
    #7
    Quote Originally Posted by JOE54 View Post
    redo their work again to be sure its right replace all 3 gaskets and impeller make sure seal is in top housing for copper tube and oriented correctly , plastic part goes in first , be surprised how many so called tech cant do a water pump correctly , seen this many times
    +100... and don't be surprised if you find a torn gasket below the impeller plate or below the water pump base.


    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).
    Mercury Parts, Mercury Outboards, Smartcraft & Accessories, Injector Service, TDR Reeds- BBC Sponsor