I viewed a 2006 Trophy with a 135hp Verado with less than 300 hours. Cosmetically both were pristine but when the outboard was started, noise was high, almost like a silencer was missing, and at idle the vibration was marked. The boat was on a trailer at the time and inside a canvas shelter. This might have amplified noise and the trailer wouldn't dampen any vibration as it would if the boat were in the water. What's the norm with this engine? Reviews I've read suggest it's quiet but some YouTube videos otherwise. And how about vibration at idle? Should this be felt throughout the back of the boat and the floor? I'm trying to arrange a mechanical inspection but wonder if I should just cut and run instead.