2006 Johnson SD 30 HP 4 Stroke Outboards Service Repair Manual, PN 5006592, Page 175Get this manual

2006 Johnson SD 30 HP 4 Stroke Outboards Service Repair Manual, PN 5006592, Page 175

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MIDSECTION CLEANING AND INSPECTION
Check the exhaust housing for distortionPlace the housing on surface plateUse dial indicator to check the flatness by measuring the run-out on the top edge of