1990 Johnson Evinrude "ES" Colt/Junior thru 8 Service Manual, P/N 507870, Page 139Get this manual
InspectionAll Models 1Before any inspection process can begin, all internal components must be clean and free of excess oilRefer to Clea ning, this Section2Make 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 The metering rods must be in place in the crankcase Place the long rod in the upper hole and the short rod in the lower hole
3 13A Check 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
4 Use 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 reason Refer to Engine Specifications, Section 1, for dimensionsUse telescoping gauge or inside-reading micrometer to inspect each cylinder bore for an out-of-round, oversize, or tapered condition Be sure the gauge or micrometer is perfectly square in the bore when measuring6Measure each cylinder in at least two areas as shownEach area should be measured twiceThe difference between the two measurements in each area is the cylinder out-of-round dimension