You can get the hours in two ways. The first way is with the Yamaha dianostic software that you can install on your laptop and get every bit of info that any Yamaha tech gets. It's not all that expensive. The second is a Yamaha diagnostic indicator tool, better known as a winky blinky. They're available from Andy Munao at
http://www.shipyardisland.com/. He's great to deal with and a no pressure guy. He'll give you any info you want.
You can e-mail him at:
parts@shipyardisland.com
You can tell him Mud Runner referred you.