1997 Johnsoon Evinrude "EU" 50 thru 70 3-Cylinder Service Repair Manual, P/N 507266, Page 76Get this manual
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Disassembly
[[] Remove the stem from the pistonDiscard the stem and the steel washersSet the flapper valve and nylon washerretainer asideClean all parts with CWIC Cleaning Solvent and ins