He's a 'mechanical' genius. [=he is a person who is very smart about machines]
He's not 'mechanically' inclined. [=he is not knowledgeable about machinery]
The flight was delayed because of 'mechanical' problems/difficulties.
(..) are doing me no good. My brain is frozen, locked. I have to break free from this culture of mechanical reproductions and the thick incrustations dying on the surface. Oh, Christ. Fuck it. These are all my dolls. (..)2003 House of 1000 Corpses