2002/2003 Johnson SN/ST 2 Stroke 3.5, 6 8 HP Outboards Service Manual, PN 5005466, Page 149Get this manual
POWERHEAD INSPECTIONALL MODELS
INSPECTIONAll Models
Before any inspection process can begin, all internal components must be clean and free of excess oilRefer to CLEANINGAll Models of this section Make 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
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 SPECIAL TOOLS AND SERVICE SPECIFICATIONS section for dimensionsUse Cylinder Bore Gauge, PIN 771310, to inspect each cylinder bore for an out-of-round, oversize, or tapered conditionBe sure the gauge or micrometer is perfectly square in the bore when measuring