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  1. #1
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    May 2009
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    68

    Which pressure gauge for 150 Merc EFI?

    I want to put a water pressure gauge on my 1996 Mercury 150 EFI. 2 questions, first, will the motor accept one? I have wires under the console of my 1996 181 that are labeled "water pressure" but they are just loose. and second, if I can, then what range should I buy? 0-15 psi or 0 to 30 psi?
    Thanks, Robert

  2. Pat Goff
    Join Date
    Jun 2004
    Location
    Seadrift TX
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    10,942
    #2

    Re: Which pressure gauge for 150 Merc EFI? (rdrakeinOK)

    Water pressure is mechanical, not electrical.

    You'll rig a small tube from the powerhead to your console.
    Pat Goff

    Two degrees from center
    of nowhere.
    Smithwick TX.

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  3. Member
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    Owasso
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    #3

    Re: Which pressure gauge for 150 Merc EFI? (pmgoffjr)

    The wires must be for the light on the gauge then. Where approximatley would the tube go to on the motor?

  4. Pat Goff
    Join Date
    Jun 2004
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    Seadrift TX
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    #4

    Re: Which pressure gauge for 150 Merc EFI? (rdrakeinOK)

    You'll see a threaded plug on each head, you can put a fitting in either one of those, or you can "T" off the hose from the telltale outlet.
    Pat Goff

    Two degrees from center
    of nowhere.
    Smithwick TX.

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  5. Champion Boats Moderator Tx Champ's Avatar
    Join Date
    Jun 2004
    Location
    Abilene, TX
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    21,097
    #5

    Re: Which pressure gauge for 150 Merc EFI? (pmgoffjr)

    Your gauges are also Teleflex. You can get the PN off of one of the others and look it up on the Teleflex site and come up with the PN for the matching water pressure gauge. A lot of them throught the 90 were Red International Domed. It will come with the tubing and fittings you need to hook it up. There is some info on Tlelflex Gauges in my Information and Links that is post pinned near the top of the ChampioN forum page.

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