Hi I replaced mine about 5 years ago. My quote at that time for OEM was about $500 usd. I did not want to spend that much so went with some from a third party. The original Yanmar
mounts are quite tall and have a large rubber vibration absorber. The ones I bought were much slimmer but only cost about $120.
I had to build up the engine base about 1 1/2 inches, with a piece of white oak, so the replacements
ones would work
It is fine but there is noticeably more vibration being transferred to the hull
If I was doing it again I would go with the Yanmar mounts but $1k does seem rather high.
around, but Yanmar restricts where their dealers can sell to, so it might be a bit awkward finding a source.