I just purchased new Rev 4 props for my mercury 350 verados with DTS. They came with the Flo-Torq SSR HD hub kits. Included in the instructions is a warning stating that "Use of this hub without proper engine calibration can cause engine shift failures....See dealer for an updated engine calibration before using this propeller hub." I've asked the company I purchased the props from and my dealer and they aren't aware of what new calibration would need to be done.

Can anyone provide info?

Service Bulletin 2016-06 covers this.
Verado 350/400R
Only applies to serial numbers 2B244272 and below