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.
(..) tonight during the repair period. Doesn't anything work around here? Logic circuits on the snake simply failed to respond. There was no sign of mechanical damage or tampering... ...and no clue to the malfunction. Central mechanism psychosis? l feel we should shut down the resort for a month. (..)1973 Westworld