1998 Johnson Evinrude "EC" 25, 35 HP 3-Cylinder Outboards Service Manual, Page 142Get this manual
[] 41Thoroughly clean and degrease the crankcase mating flange of the cylinder block with OMC Cleaning Solvent and let air dry[] 42Apply OMC Locquic Primer to the mating flange of the crankcase and let air dry [j]]
43Apply OMC Gel-Seal" sealant to the crankcase mating flange of the cylinder blockThe application must cover the flange evenly and consistently without being excessiveThe application must not come within 114 in(6,4 mm) of crankcase seal rings or bearing
INote OMC Gel-Seal" sealant has shelf life of at least one year
when stored at room temperatureTest the OMC Gel-Seal" sealant or replace it ifthe age of the tube cannot be determinedUsing old OMC Gel-Seal 1 sealant could cause crankcase air leaks