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
Chris
Thumbnail(s)


![[-]](https://www.tiaraownersclub.com/forum/images/netpen-pro/collapse.png)