I will be following it too. The old Yanmar Company - before they joined with JD - provided excellent technical support to their customers. On the other hand, they ultimately shafted all their dealerships, which gave them the reputation that still follows their name in the US
I don't think that Yanmar understands the importance of manufacturer/dealer/customer support in the US market. Perhaps it is different in the rest of the world. Not here.
Although I am even more perplexed at why your dealer doesn't simply trade out your lemon for a different machine. After all, he is the person who is ultimately responsible to you - both legally and morally. It's not you who have a problem with Yanmar, it's him. And I further believe that would be what the lemon law will say as well - if you elect to apply it.
Then if he has a problem with Yanmar backing him up, that will be HIS problem......just as it should be. Regardless of how your local law is written, you are the consumer to be protected. Both your dealer and Yanmar are on the other side of the fence from you. Let them fight it out.
rScotty