2004 SR Johnson 4 Stroke 9.9-15HP Outboards Service Repair Manual P/N 5005655, Page 112Get this manual
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POWERHEAD INSPECTIONSERVICING
Micrometer
Service limit: J10 IN and J15 IN and
22.100 mm (0.8701 in) 23.320 mm (0.9181 in)
If lowe than sevice limitReplace