1968 Evinrude Starflite 100 HP outboards Service Manual, Page 22Get this manual
Figure 3-19Disassembling Leaf Block Assemblies dCheck the needle valve seats with magnifying glassIf seat is nicked, scratched, or worn out-.ofround, it will not give satisfactory serviceSee Figure 3-20The valve seats are matched with the needles; if the seat or the needle is damaged, both parts must be replacedUpon reassembly of the needles and seats always use new valve seat gaskets and "0" ringsAn excessively worn needle or seat will affect float level GOOD