Join Date: Sep 2008
Location: Victoria B.C. Canada
Thanked 105 Times in 96 Posts
Rep Power: 9
It depends. Yanmar recommends every 2 or 3 years but I'd bet nobody does it that often. Yanmar mounts are quite soft. In my experience they harden with age as the rubber gets older. There are probable a lot of 20 year or older boats still with the original mounts.
Living aboard in Victoria Harbour