2006 SD Johnson 4 Stroke 9.9-15HP Outboards Service Manual, Page 166Get this manual
POWERHEAD CYLINDERCRANKCASEPISTON ASSEMBLY Install 1st ring on pistonThere is no 1.0mark on standard 1st ringApply engine oil to piston and cylinder wallsInsert piston and connecting rod assembly into cylinder bore from cylinder head side using piston ring compressor
1st Ring 2nd Ring
IMPORTANT: Position the "0" mark on piston