Reply to "tachometer indicates 2X the actual rpm"

dave2811Member

There is no switch, but there is a potentiometer on the simple circuit board inside the case that is used for calibration.

You can try to connect a set of jumpers to the connector and use another reference source to match the reading, or just take it to a tach shop that can calibrate it for you.

8/9/136:45 PM

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