Search results

  1. B

    inaccurate temp gauge -strange ground reading

    I have a 1990 3.9 Mercruiser that the temp gauge barely reads above 120. Grounded the sending wire and gauge moves accordingly. Thought maybe problem with thermostat or temp sending unit. Both seem to test okay. I checked the tan sending wire at the temp sensor. I was getting about 9.5V...
  2. B

    1990 3.0 Mercruiser ignition -no spark

    I have a 1990 3.0 Merc with a conventional prestolite ignition that will not start. I had replaced all tune up components (points,cap,plugs, etc.) 3 weeks ago. Boat was running fine until the other day when I was messing with the temp sending unit and gauges and think I must have screwed...
Top