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VDO Tachs
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Looking for info on the VDO tachs installed at the helm of my '95 3100 Open.  Does anyone have documentation regarding the adjustments on rear of gauge?  I assume the lower pot is for calibration & the upper pot is for cylinder selection.  Gauges are working, but I am just curious.  No info in my owners paperwork & nothing online, as they are 20 years old.


Chris


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