1998 Johnson Evinrude "EC" 9.9 thru 30 HP 2-Cylinder Outboards Service Manual, Page 179Get this manual
34Thoroughly clean and degrease the crankcase mating flange of the cylinder block with OMC Cleaning Solvent and let air dry35Apply OMC Locquic Primer to the mating flange of the crankcase and let air dry 2S
36Apply OMC Gel-Seal II to the cylinder block flangeThe application must cover the flange evenly and consistently without being excessiveThe application must not come within in(6,4 mm) of the labyrinth seals or bearings
INote OMC Gel-Seal II has shelf life of at least one year when
stored at room temperatureTest the OMC Gel-Seal II or replace it if the age of the tube can not be determinedUsing old OMC Gel-Seal II could cause crankcase air leaks
37Lower the crankcase into place38Lightly coat threads of the six main bearing screws with OMC Gel-Seal IIInstall the screws finger tight39When the crankcase is seated, install and firmly seat the crankcase taper pin40Install crankcase flange screws finger tight1562