1990 Johnson Evinrude "ES" Cross V 88 thru 115, 150 thru 175, P/N 507874, Page 84Get this manual
Inspection 1Inspect the leaf plate assemblies for damage The gasket surface must be flat, .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 loose or distorted COA2852
2Inspect the intake manifold All gasket surfaces must be smooth and free of nicks Use machinist's straightedge to check for flatness in all directionsThe mounting surface must be flat, .004 in (0,10 mm)
INote All intake manifold componentsstrong carburetor cleaner must be perfectly clean before assemblyDo not use a
or hot soaking tankAssembly
f31 1Place
leaf valves on leaf plateIf new valves do not seat on the leaf plate, turn the leaf valves over
Used leaf valves must not be turned over for reuseLeaf valve may break when returned to service causing serious powerhead damage