1990 Johnson Evinrude "ES" Electric Trollers Service Manual, P/N 507869, Page 100Get this manual
Deck Bracket and Bow Arm Servicing Removal
1Hand Control ModelsRemove alignment plate2Loosen the motor tube bracket clamp3 Separate the clamp and remove the trolling motor assembly4Loosen and remove four screws retaining deck bracket5Separate deck bracket and bow arm from motor rest