How To Tell What Year Model My Motor Is?

Bought a boat and have bought its problems. I know same story different day but for a new timer I know Zero. So how do I find out what year model my Yamaha 70hp outboard is? The model number is 60ESL-71C, serial is J3493835.

[boats.net]

Don't have that model number listed, Is this a motor that was sold in USA or Canada?

[jb123]

this is a foreign list but i didnt see your model listed:

Yamaha båtmotorer & båtmotor | Marinshopen