1993 Johnson Evinrude "ET" 60 thru 70 Service Manual, P/N 508284, Page 149Get this manual
Inspection 1Before any inspection process can begin, all internal components must be clean and free of excess oil2Make visual inspection of all internal componentsCheck for unusual wear patterns, scuffing or deterioration of aluminum parts, heat-related discoloration of bearings or bearing surfaces, and broken components f213Check for cylinder head warpage using piece of bar stock
or machinist's straightedge and feeler gauge set Cylinder head warpage must not exceed 0.004 in(0,10 mm) end to endResurface or replace head if warpage exceeds this dimension
1al4Use micrometer to measure the diameter of each crankpin
and main bearing journalThe lower main bearing journal would only be measured if the bearing was removed for another reasonRefer to Engine Specifications, Section 1, for dimensions
1415Use telescoping gauge or inside-reading micrometer to
f516Measure each cylinder in at least two areas as shownEach