2003 ST 4 Stroke 9.9/15HP Johnson outboards Service Repair Manual P/N 5005714, Page 134Get this manual

2003 ST 4 Stroke 9.9/15HP Johnson outboards Service Repair Manual P/N 5005714, Page 134

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POWER UNI CYLINDERCRANKCASEPISTON ASSEMBLY Piston ring thickness Standard: 1st and 2nd 1.17 -1.19 mm (0.04610.0469 in) Piston ring to groove clearance Standard: 1st and 2nd 0.020.06 mm (0.00080.0024 i