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  1. #1
    Member
    Join Date
    Feb 2016
    Location
    New Hope AL
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    862

    Water pressure gauge

    My boat has a 1990 mercury 2.5L 200hp and I'm getting ready to order a water pressure gauge. Should I get a 15psi gauge or a 30 psi gauge also what is the ideal psi for my motor?

  2. Member Jason280_2's Avatar
    Join Date
    Jun 2014
    Location
    Milledgeville, GA
    Posts
    225
    #2
    Not sure if yours will be the same, but the recommendation I was given for a '95 Black Max XRi 200 2.5L was 2-4psi at idle and 12psi at WOT (both are bare minimums). Mine would hit 16-18psi at WOT with a new impeller, but has dropped back down a bit this year (around 10 or so)...will be replacing the water pump in the next week or two (current one is 3 years old).

    I replaced my gauge with a 30psi model.

  3. Member
    Join Date
    Mar 2012
    Location
    Pelham, GA
    Posts
    2,003
    #3
    I got 30 psi for mine, works well.

  4. Member
    Join Date
    Feb 2016
    Location
    New Hope AL
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    862
    #4
    Ok thanks fellas!

  5. Member
    Join Date
    Nov 2008
    Location
    Raleigh NC / Falls Lake
    Posts
    11,207
    #5
    Go with the 30 pis .

  6. Member
    Join Date
    Mar 2015
    Location
    Columbiana AL
    Posts
    4,854
    #6
    Saw one on eBay tonight for $25