I'm getting this 3rd hand from a reliable source, as opposed to directly from
Yanmar, which I am trying to contact.
Yanmar, after analyzing
repairs on engine mounts determined that the silent blocks of the engine mounts of some models were undersized, and the required spacers were missing, and have initiated a change out to fix this.
Again, 3rd hand, and I have no direct info from Yanmar yet, so I would not jump to any conclusions at this time.
If I get more info, will post.