1965 Evinrude SportFour Heavy Duty 60 HP Outboards Service Repair Manual, P/N 4204, Page 19Get this manual

1965 Evinrude SportFour Heavy Duty 60 HP Outboards Service Repair Manual, P/N 4204, Page 19

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LEAF VALVES The only requirements for leaf valves are that they must be cleaned of all dirt, gum, and varnish, and that the leaves must be perfectly flat and without distortion so that they form perfe