1991 Johnson/Evinrude Models "EI" 40 thru 55 Service Manual, Page 217Get this manual
Gearcase Servicing45, 55 Removal
To avoid accidental starting of engine while servicing, twist and remove all spark plug leads
2Remove the shift lever retaining pin Push the shift lever toward the powerhead to disengage the shift lever from the shift rod
3Mark the trim tab and the gearcase before removing the trim tab so tab is put back in the same positionRemove the trim tab retaining screw and the trim tab from the gearcase
4 Using inthin wall socket, remove the countersunk screw with the lock washer5Remove the screw from inside trim tab cavity