Results 1 to 6 of 6
  1. #1
    Member
    Join Date
    Jan 2013
    Location
    Madisonville TN
    Posts
    94

    Bad water pressure 98 225 optimax

    Replaced the water pump in my 1998 225 optimax due to low water pressure. I still have low water pressure and noticed today I'm loosing alot of water around the top of the lower unit. I know the pickup tube is properly aligned and I've made shure the water lines are free from obstruction this has me scratching my head any help is appreciated

  2.  
  3. Member
    Join Date
    Jan 2013
    Location
    Madisonville TN
    Posts
    94
    #2
    I replaced all the gaskets under the housing also

  4. Member
    Join Date
    Jul 2004
    Location
    Penn PA
    Posts
    8,861
    #3
    Are you testing the pressure on the hose, or in the water?
    Don't take others for granted, show appreciation.
    There is no substitute for experience!

  5. Member
    Join Date
    Jan 2013
    Location
    Madisonville TN
    Posts
    94
    #4
    It's in a large tub of water it has a low water pickup lower unit and the pickups are completely submerged

  6. Member
    Join Date
    Jul 2004
    Location
    Penn PA
    Posts
    8,861
    #5
    What is the pressure at idle?
    Pressure specifications are given for idle and WOT only.
    I suggest that you lake test the boat, because ram pressure will make a difference.
    Don't take others for granted, show appreciation.
    There is no substitute for experience!

  7. Mercury 3L/4 Stroke/Verado Moderator EuropeanAM's Avatar
    Join Date
    Apr 2008
    Location
    Greenville, SC (US)
    Posts
    72,266
    #6
    +1

    What is the water pressure AT IDLE?


    Dual Mercury Master Technician- for Mercury Outboards, Racing & Mercruiser Sterndrives in Greenville, SC.
    Still consider myself a "Marine Apprentice" after 40 years (learn something new every day).
    Mercury Parts, Mercury Outboards, Smartcraft & Accessories, Injector Service, TDR Reeds- BBC Sponsor