1997 Johnson Evinrude "EU" 90, 105RW, 115, 150, 150W, 175 60 LV Service Manual, P/N 507268, Page 163Get this manual
40Apply OMC Locquic Primer to the mating flange of the crankcase and let air dry
41Apply 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 14 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-Sealsealant or replace it if the age of the tube cannot be determinedUsing old OMC Gel-Seal 1 sealant could cause crankcase air leaks
42Thoroughly clean upper seal area of the crankshaftPlace new upper seal on crankshaftDo not apply sealer to outside diameter of the seal43Lower the crankcase into place