Re: 85hp johnson model #85ESL75E
An electric shift motor would have a green and a blue wire going to the gearcase to active the shift coils.Yours has a shift rod located under the carbs that your remote control moves.This in turn moves a plunger in the gearcase and the hydraulic pump helps activate the clutch dog.
The head gasket is # 318662 and should be easy to get from your local Johnson/Evinrude Dealer.I could not cross it over to Sierra,so I think you need a Dealer.Some of them ain't all that bad.Most of them don't bite.
DHP