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  1. H

    Water Temperature Sending Unit

    I might have to drill and tap a sending unit in behind the thermostat. I'm sure I have the drill bit and tap. There is a buzzer under the console that cherps when I turn the key to on.
  2. H

    Water Temperature Sending Unit

    I have a pressure gauge.
  3. H

    Water Temperature Sending Unit

    I don't know what is with me but I read it as a gray wire or read it as tan but in my head, it clicked over to gray. When I was trying to get the tachometer working I remember there was a tan wire under the dash. Would a regular digital temperature gauge work and what would be a normal...
  4. H

    Water Temperature Sending Unit

    While I was figuring out what was wrong with the tachometer (dead), there is a gray wire that starts at the voltage regulator (top one of two between cylinder banks) to the tachometer. I will look for another gray wire. I was thinking of installing your run of the mill temperature gauge for...
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    Water Temperature Sending Unit

    Where is your water sensor located?
  6. H

    Water Temperature Sending Unit

    Just what I didn't want to do, drill and tap.
  7. H

    Water Temperature Sending Unit

    I have a 1996 Mercury 150 hp EFI, is there a port to install a water temperature sending unit for a temperature gauge in a water jacket? If so where would it be located? Thanks in advance for all your replies.
  8. H

    Draining old fuel out of engine

    New member here looking for some help. Big thanks to those who can help me. I just purchased a boat with a 1997 150 merc EFI 2 stroke and getting all the year old gas out if it. I have drained the vapor separator by opening the screw in the lower left of the VS, and new fuel filter. Then I...
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