Digital Tach Part Numbers?

[PapaLouie]

Yamaha lists the current Digital Tach PN as either 6Y5-8350T-81-00 or 6Y5-8350T-82-00.
I need to replace two of these and have found them on the net, but the PN is different?
6Y5-8350T-82-BK.
Anyone have a clue as to the different numbers and if these will work. Engines are 250 HPDI 2003?
Thanks...

[boats.net]

The 6Y5-8350T-81-00 supersedes to 6Y5-8350T-82-00. But you can order the kit 6YR-W0035-E1-00 and it comes with everthing you need and it's cheaper than the the gauge by itself.