Here's the Deal: I looked on Boats.net. The Original Part in my Yamaha was a 67F-85540-01-00, When I contacted Yamaha, they said that this part was superceded by 67F-85540-03-00, and the part I can get used is a 67F-85540-02-00. This one is used on the 2003-2004 Yamaha F90 and F100. So I don't think wiring or programming would be an issue, and it should be backwards compatible, right?
Update: All those motors use the same wiring harness. So it should all work, or am I missing something here?