By your model number you have an evinrude not a johnson, no big deal, there both the same.
Look at the site below. Start by removing the water intake screens,#30, then remove the shift rod connector nut,#49. Becareful when you remove the shift rod keeper #73 that you don't loose it. Then remove all the gearcase screws #76 and the nut #54 and the gear case should drop down. http://www.ishopmarine.com/ishop/js...CatFilter=BRP&eCatSupFldr=supplier-100-005-EJ