1998 Johnson Evinrude "EC" 25, 35 HP 3-Cylinder Outboards Service Repair Manual P/N 520205, Page 133Get this manual
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4 Use Gel Seal and Gasket Remover to remove all traces of gaskets, adhesives, and Gel-Sealll sealant from the cylinder bIock and crankcase5 Carefully remove accumulation from the tops and ring grooves