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    Tach non working on Mercury classic 50

    Rectifier tested good. Continuity from tach all the way back to rectifier. I have continuity with power ground and signal. Checked voltage at signale with motor running. Have voltage. Seems like I just have a bad tach. New one already ordered. Thanks all for all the help.
  2. O

    Tach non working on Mercury classic 50

    Will try this in a little bit. Thank you sir!
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    Tach non working on Mercury classic 50

    I have red, yellow, yellow, and my tach wire.
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    Tach non working on Mercury classic 50

  5. O

    Tach non working on Mercury classic 50

    It does still charge my battery when running, but how would I go about testing the rectifier? I have cleaned all the connections, verified none of them are broke. Applied dielectric grease and reinstalled. All the connections are on properly per almost every wiring diagram I have read. The two...
  6. O

    Tach non working on Mercury classic 50

    How would I check to see if I'm getting a signal to the tach? All of mine came hooked up when I bought the boat, but the tach doesn't work. Could it just be an old worn out tach? Everything on this boat is a 1986. Thanks all.
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