1998 Johnson Evinrude "EC" 90, 115 SPL Service Manual, P/N 520209, Page 88Get this manual
7Use sharp pencil to mark the edges of leaf valves
rnalignmentpencil eraser over the portValves should betospaced 8Use to gently open the leaf valves check the of the valve
evenly over portIf not, loosen mounting screws and reposition leaf valve9After leaf valve is positioned properly, install remaini ng screwsTighten all screws evenly to torque of 25-35 inIbs(3-4 Nm)10Apply OMC Locquic Primer and OIVIC Nut Lock to the leaf plate assembly to manifold screws11 Using new gaskets installed dry, position each leaf plate assembly and torque the screws to 25-35 in Ibs(3-4 Nm) Installation