1998 Johnson Evinrude "EC" 9.9 thru 30 HP 2-Cylinder Outboards Service Manual, Page 168Get this manual
6Remove all the screws from the cylinder head water cover, tap it around the edge with soft mallet to break the seal, and then remove itRemove the thermostatsealand spring Then, remove the cylinder head7With number punches, mark the top piston dome "No1" and the bottom piston dome "No2"
8Remove the inner and outer exhaust covers; carefully separate the pieces and clean the gasket surfaces
INote Check the