1998 Johnson Evinrude "EC" 90, 115 SPL Service Manual, P/N 520209, Page 87Get this manual
Inspection
1Inspect the leaf plate assemblies for damage The gasket surface must be flat, 0.003 in(0,08 mm) The leaf plates must not be distorted[}] The leaf tips must not be cracked or chipped The leaf plate stops must not be distorted or loose Test leaf plate screw tightnessIf loose, retighten using OIIIC Screw Lock
2Inspect the intake manifold All gasket surfaces must be smooth and free of nicks
rn directionsThe mounting surface mustflatness in all Use machinist's straightedge to check the be flat,
0.004 in(0,10 mm)INotel All intake manifold components must be perfectly clean before assemblyDo not use strong carburetor cleaner or hot soaking tankCOA2849
Assembly
rnleafPlace leaf valvesleaf leaf plateIf new valves do not seat on 1on the plate, turn the valves overINote Used
leaf valves must not be turned over for reuseLeaf valve may break when returned to service, causing serious powerhead damage1254