1979 Evinrude Outboard 9.9/15 HP Service Repair Manual Item No. 5426, Page 66Get this manual

1979 Evinrude Outboard 9.9/15 HP Service Repair Manual Item No. 5426, Page 66

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WGRN RING GROOVES
Figure 5-25 Piston and Ring Conditiol1 {Lower and upper crankcase seal and should replacedgRoller bearing in placed if damagedPISTONS Check the pistons for excessive skirt wear