lawn mower fanatic is right. USA models end in "A" while Canada market models end in "C"
Often, and this is the usual case with lawnmowers, the only differences are the safety labels; USA models are in English, while Canada market models have them in French/English.
From what I can tell, the parts are all the same for both models; the part number for the crankshaft is 13310-ZE7-771 and sells for $163.00 list price. Most dealers sell for less, so shop around. Google the part number, or use this link to find a dealer in Canada:
Honda Dealer Locator (Canada)