So I been looking at the "certified" brand mowers as well as Toro, and Troy Bilt. The certified mowers at Canadian Tire come with a 150cc engine, though they wont say who provides the engine.. thats what im trying to find out.. I know they also have a 174cc unit on another certified model.. im just curious to know what type of engine they use on it, hopefully someone knows and can let me know, thanks in advance!