1988 Johnson Evinrude CC 60 thru 75 outboards Service Manual, Page 111Get this manual
7Use sharp pencil to mark the edges of leaf valves 8Use pencil eraser to gently open the leaf valves to check the alignment of the valve over the portValves should be spaced evenly over portIf not, loosen mounting screws and reposition leaf valve 9After leaf valve is positioned properly, install remaining screwsTighten all screws evenly to torque of 25-35 inIbs(3-4 Nm)10Apply GMC Locquic Primer and GMC Screw Lock to the screws, leaf plate assembly to manifold11Using new gaskets installed dry, position each leaf plate assembly and torque the screws to 25-35 inIbs(3-4 Nm)Installation 1Using new gasket installed dry, install the intake manifoldTorque the screws evenly to 60-84 in Ibs(7-9 Nm)2Following steps listed in Carburetor Installation, this Section, install carburetors3Refer to Synchronization and Linkage Adjustments, Section 1, for adjustment information