Ben Jackson wrote:
On 2005-04-05, Jay Honeck wrote:

As the rubber mounts age, the engine sags a bit, and they become stiffer,
transferring more vibration to the airframe.


Is it really worth replacing the rubber mounts on a mid time engine with
a lot (10-15 years) of calendar time on it?

Why not? If it turns out not to be the problem it's one less thing to
buy at the overhaul.