1998 Johnson Evinrude "EC" 90, 100C, 105C, 115, 150, 150C, 175 60 deg. LV Service Manual, P/N 520210, Page 103Get this manual
5Assemble leaf valve shim (if required) and leaf stopInstall two screws near center of leaf stopDo not tighten
6Hold leaf valve assembly in horizontal positionThis will usually align leaf valves over ports in leaf plateTighten the two screws evenly7Use 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 leafvalve is positioned properly, install remaining screwsTighten all screws evenly to torque of 25-35 inIbs(3-4 Nm)Installation