1995 Johnson/Evinrude Outboards 9.9, 15 four-stroke Service Manual, Page 117Get this manual

1995 Johnson/Evinrude Outboards 9.9, 15 four-stroke Service Manual, Page 117

16Place the top two rings of each piston, separately, in its respective boreUse piston to square the ring in the cylinderUse
the top two ringsInstall rings on its pistonWhen checked with the straightedge, there should be enough ring clearance to
allow the straightedge to touch the piston on both sides of the ring grooveMake several checks around the pistonIf straightedge
does not touch piston, remove the ring and clean ring groove19If the grinding on the sides of the piston is worn smooth in