1970 Johnson 115 HP Outboard Motor Service manual, Page 55Get this manual
5-10 polished to dull lust erSee Figure 5-23Finish surfacing with No180 emery clothNOTE Cylinder block and crankcase must be completely lean of all foreign matter prior to reassemblyUse Solvasol for cleaningDO NOT scratch cylinder head gasket surfaces of cylinder Figure 5-22Breaking Cylinder Glaze CRANKSHA FT SEAL RINGS