I have a 1985 Yamaha 70. This wknd the trim motor seemed to be straining harder than usual (based on sound pitch & that the engine seemed to tilt up more slowly). During trimming I saw smoke coming from the trim motor region. Looking closer I found a ground wire that is bolted to the motor bracket and saw that this ground wire was smoking hot - literally. Engine was not running so I was not confusing this with exhaust. Anyone have a similar experience they can share?