You can cut and glue a large piece of tire bladder, PVC, to both sides of SS engine mount and secure a small rope between both clamp's eyes. If you can make them face each other well tight the better. Don't know why boaters always adjust both clamps tight and forget all about engine vibration issues loosening clamp tightness and losing engine.
Have seen careless boaters dropping main engines & aux into the blue from 3.5 to 30 HP, most irrecuperable due to waves, wake, not having marked dropping position fast enough or deep waters issues, some even being unaware having lost it's aux engines, a real engine crime indeed. You must always place a safety line between engine and boat, just in case...