1990 Johnson Evinrude "ES" Cross V 88 thru 115, 150 thru 175, P/N 507874, Page 85Get 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 valve9After leaf valve is positioned properly, install remaining screwsTighten all screws evenly to torque of 25-35 inIbs: (3-4 Nm)10Apply OMC Locquic Primer and OMC Screw Lock to the screws, leaf plate assembly to manifold 11 Using new gaskets installed dry, position each leaf plate assembly and torque the screws to 25-35 inIbs(3 -4 Nm)Installation