1999 "EE" Evinrude 70HP 4-Stroke Service Manual, P/N 787023, Page 120Get this manual
Cleaning
INote Before
inspecting or assembling powerhead, all internal components must be clean and free of contaminants
1Remove any carbon accumulation from cylinder head combustion chambers
avoid personal injury, wear eye protection and rubber gloves when using OVIC Gel Seal and Gasket Remover2Use O'IC Gel Seal and Gasket Removerto remove all traces of gaskets and adhesives from the cylinder head
3Thoroughly wash entire cylinder head with warm, soapy water to remove all traces of contaminants&
To avoid personal injury, wear eye protection and set compressed air pressure at less than 25 PSI (172 kPa)
4Air dry cylinder headBlowout all holes and passageways with compressed airInspection
1Prior to any inspection process, all internal components must be clean and free of excess oil2Inspect all internal componentsCheck for unusual wear patterns, scuffing or deterioration of parts, heat-related discoloration of bearings or bearing surfaces, and broken componentsDRC7531