2006 SD Johnson 4 Stroke 9.9-15HP Outboards Service Repair Manual P/N 5006590, Page 160Get this manual
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POWERHEAD CYLINDERCRANKCASEPISTON ASSEMBLY Measure tig rod big side with tig od istlld If sumt exceeds sevice limit, replace the tig rod d kshft rod big widthStdd0.785 to 0.787 i(19.95 to 20.00