1989 Johnson Evinrude "CE" 9.9 thru 30 Service Manual, P/N 507754, Page 166Get this manual
r:j9l 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 head
7With number punches, mark the top piston dome "No1" and the bottom piston dome "No Remove the inner and outer exhaust covers; carefully separate the pieces and clean the gasket surfaces
Check the inner exhaust cover for pitting and flatness If pitting exists or the cover is warped, discard it and replace with new cover during reassembly9Remove the intake bypass cover and clean the gasket surfaces10Remove the five nuts, two hex head screws and one flat head screw, and remove the intake manifold