I recently paid off my mortgage, so I just spent my tax refund on a shiny new Davis 6163. I have an older serial weatherlink that I got a few years ago (~2008) to use with an old used Vantage Pro that I got on eBay.
Am I correct that I will need a new revision serial weatherlink for the new console?
Can I use the old console/weatherlink with the new ISS to drive WD without loss of functionality?
Yes. You could also consider one of the third party loggers like belfry boy’s, AFAIK he can do regular serial too.
2. Can I use the old console/weatherlink with the new ISS to drive WD without loss of functionality?
It depends.
You wrote “old used Vantage Pro” - If the console is indeed a Vantage Pro and not Vantage Pro 2 then no, it’s a whole different wireless system. If that old used console is from a Vantage Pro 2 then almost certainly yes. Post the model number if not sure.