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  1. #1
    Member
    Join Date
    Aug 2019
    Location
    greensboro, nc
    Posts
    346

    Mercury Thermostat Replacement?

    I have a 2013 Mercury Pro XS Optimax serial# 28018990 model # 175P73EY. I am curious how involved is it to replace the thermostat on this Mercury?

  2. Member
    Join Date
    Mar 2012
    Location
    Pelham, GA
    Posts
    2,003
    #2
    This may help, located in the faq.
    http://www.bbcboards.net/showthread.php?t=25691
    this thread is how to replace the thermostats on a 3.0 L Optimax, a 2.5 L could/would be different.
    Mercury 2002 200hp Carbed Saltwater
    OT566776
    2002 Cape Horn 22' Bay

  3. Member
    Join Date
    May 2011
    Location
    Spangle, WA
    Posts
    6,180
    #3
    Not that difficult on the 2.5. I use a stubby 8mm wrench and can remove/install without messing with the fuel rails.
    _______

    Phil
    '09 Hewescraft ProV
    '09 150 Optimax


  4. Banned
    Join Date
    Mar 2014
    Location
    Unionville, NC
    Posts
    8,911
    #4
    Shouldn't have to remove the fuel rails, but I had to loosen mine and back them off about 1/4". It's not a hard job.