Ok, even though we are a Yamaha dealer and a merc,evin/johnson etc the only one so far has been with Merc. The Canadian motors have a serial number that when through Merc warranty they will kick it back as the engine was sold in canada.
Some parts are different and have a completly different parts number than what is sold here in the states. Also remember that when you go up to Canada to buy you are supporting their economy not ours. I'm not sure about the Yama's I will check with Yamaha on this.