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Recent content by sr2

  1. S

    Mercruiser water pressure sensor

    I'll use 2x 1.5K ohm .5 watt resistors. (could even possibly go down to .25 watt as it's a signal but playing it safe). V out = ( R2 x V in ) / ( R1 + R2 ).
  2. S

    Mercruiser water pressure sensor

    Typical Signal Voltage Range: 0.5 V or lower = Low or no pressure 2.5–3.5 V = Normal operating pressure (depends on RPM and engine load) 4.5–5 V = High pressure (or potentially a faulty sensor/wiring) I'll use two same resistors in series as a voltage divider between the ground and 5V supply...
  3. S

    Mercruiser water pressure sensor

    Hi guys, I've finally found the info. Pin Wire Color Function Pin 1 Blue Signal – sends pressure status to gauge/ECM Pin 2 Black/Pink Power/Reference – provides 5 V supply from ECM/gauge Pin 3 Black Ground – chassis or ECM ground reference
  4. S

    Mercruiser water pressure sensor

    Hi guys. I have a Carver 2500 that runs a MAP/MPI 350 with a Bravo 3 leg. The motor is has low hours on it and is well maintained. I’ve had my 2nd water pressure sensor failure in two years, I’m over it and want to disable it for once and for good! I'm well aware of what it does and being...
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