B+ motorhomes

Since this topic doesn't seem to have very wide readership, I started a new thread with this question. But I thought I should ask here too to cover my bases. Those of you with Trail Lites, does your Onan cause vibration in the coach? The floor feeling buzzy, anything like that? Or is it practically still, other than the sound?

I'm thinking I might have one or more bad rubber mounts on the genset. One of them certainly looks like it could be going bad.