Tachometer and Battery Charging

I have a 1986 Evinrude 60HP Outboard motor, and I notice that the tachometer Gauge is not registering and seems to be stuck on ZERO, the battery charge gauge shows battery is not charging. All other gauges are working and engine starts and runs Okay. Last time I noticed it was working. Need to know the cause and how to fix the problem.

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Sep 08, 2007
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Tachometer Battery Charging Solution
by: Anonymous

Same thing happened to my Johnson 120. There are diodes that rectify the alternator current and drive the tachometer. I replaced that diode pack on the advice of a boat mechanic. Problem was solved

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