1999 EE Johnson Outboards 25, 35 3-Cylinder Service Manual, Page 143Get this manual
41 Thoroughly 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
43Apply OMC Gel-Seal II 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 in(6,4 mm) of crankcase seal rings or bearing
INotel OMC Gel-Seal II sealant has shelf life of at least one year when stored at room temperatureTest the CIVIC Gel-Seal II sealant or replace it if the age of the tube cannot be determinedUsing old OMC Gel-Seal I sealant could cause crankcase air leaks