Perkins M30 bouncing around at start and stop

[Tamar]

It does this. I think the new mounts might be too soft. Any recommendations. I can't remember what it did with the old mounts. The new ones are 45 shore as recommended by parts for engines

 

[Poignard]

Anti Vibration Solutions, Mounts & Components

 

[mjcoon]

Anti Vibration Solutions, Mounts & Components

My long-term sailing mate used to manufacture such things before retirement. Working for Trelleborg and making Metalastik brand as cited on that linked page. But he's careful to keep out of any chartered yacht's engine bay!