Results 1 to 2 of 2
  1. #1
    Join Date
    Jun 2012
    Westmeath, Ontario, Canada

    Water Pressure Guage not working (09 Merc 225 Pro XS, Triton X3)

    First time out on Sun, water pressure guage not working. It appears to work on same principal as speedometer which I had to replace after 1st winter
    because it froze (I now take it out every winter). I have taken out the water pressure guage, before I order a new one here are my questions:

    Where on my 09 Merc 225 Pro XS (Triton X3) am I going to find the water pressure line connect to motor, so I can verify it is connected at motor. If so I was going to disconnect it and blow the line. If all is clear there, then I will proceed to ordering a new guage. Does all of this make sense??? You guys have never
    let me down in the past ...... thanks in advance.

  3. Mercury 3L/4 Stroke/Verado Moderator EuropeanAM's Avatar
    Join Date
    Apr 2008
    Greenville, SC (US)
    At the back of the engine, BELOW the coil plate, is a small, GRAY plastic line connected to a fitting.

    This line "tees" about 5-6" outside the block, with one line running up to the Block Pressure Sensor, the other line running forward to the rigging tube (to feed an analog water pressure gauge).

    Dual Mercury Master Technician- for Mercury Outboards, Racing & Mercruiser Sterndrives in Greenville, SC.
    Still consider myself a "Marine Apprentice" after 38 years (learn something new every day).
    Mercury Parts, Mercury Outboards, Smartcraft & Accessories, Injector Service, TDR Reeds- BBC Sponsor