The Yamaha Digital Tach on my 2001 F-115TLRZ started to read erratic this afternoon. The tach will jump high in RPM by 20%-50% every 5 or 6 seconds and then return to normal. No change in load or motor revs accompanies the change on rpm reading. This is ocurring at all engine speeds. I checked the connections under the dash and have not found anything which could explain what is going on. Looking for troubleshooting suggestions.
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Yamaha Tachometer Erratic
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