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  1. C

    Tachometer not working

    I have a 1975 Evinrude 70 HP outboard and I cannot get the tach to work. This is the second tach that I have had on this boat and the first one never worked either. I fed it a square wave signal from a signal generator and it worked fine. This one is a brand new (NOS) OMC digital tach and it...
  2. C

    1971 Evinrude 60 HP Tach. Trouble

    My tachometer pegs out whenever the engine is running, no matter what the rpm. It reads zero when the engine is not running. I recently purchased the boat. I checked the charging circuit and had to replace the rectifier. It now charges OK but the tach is out to lunch. The tach is connected...
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