2006 Johnson SD 30 HP 4 Stroke Outboards Service Manual, PN 5006592, Page 141Get this manual
POWERHEAD CYLINDER HEAD
Camshaft
Inspect the cam face, the camshaft journals, and the journal bores for pitting, scratches, wear, or damageIf any such conditions are found, replace the camshaft andor the cylinder headUse micrometer to measure the cam heightIf the measurement exceeds the specification, replace the camshaftCam Height Specifications Model Standard Service Limit 1.42031.4266 in1.4164 inIN (36.07636.236 mm) (35.976 mm) 30 1.3886 1.3949 in1.3847 inEX (35.271 35.431 mm) (35.171 mm)
The service limit for camshaft runout is 0.004 in(0.10 mm)If the measurement exceeds this specificationreplace the camshaft