1978 Evinrude Outboards 9.9/15HP Service Manual, Page 25Get this manual
bIf leakage still exists, remove the lead shot with an appropriate sharp toolcClean and inspect casting openingIf the casting opening is normal, install new lead shot in casting opening and flatten out with light hammer tapsCheck for leakageLEAF VALVES if necessary
CARBURETOR BODY aInstall lligh-speed orifice plug in carburetor bodyReplace float valve seat and gasket, float valve, float, and hinge pin
aInspect the leaf plate assembly and disassemble The leaf valves must be free from all varnish and gum, and the leaves must lay perfectly flat so they form perfect seal with the leaf plate baseSee Figure 3-21LEAF STOPS
LEAF VALVE