2003 Johnson ST 6/8 HP 4 Stroke Outboards Service Manual, PN 5005471, Page 164Get this manual
POWERHEAD ASSEMBLYHP To install oil control ring assembly, place segmented ring in bottom groove firstInsert the end of first scraper ring under segmented ring and work around until installation is completeInsert second scraper ring, above segmented ring, in the same fashion
IMPORTANT: Use this illustration for proper piston ring placement
1Scraper ring gaps 2Middle compression ring gap 3Segmented ring gap 4Top compression ring gap
Cylinder Block and Crankcase
Angle the scraper ring end gaps and segmented ring gap 45 from center points of wrist pin to ensure proper sealingInstall the middle ring in the middle ring groove with the "2" stamping facing up (white paint to right side of gap)Install the top ring in the top ring groove with the "R" stamping facing up (orange paint to right side of gap)Angle the end gaps of the rings, opposite each other, 90 from center point of wrist pin to ensure proper sealingCoat the piston and cylinder bore with oilPlace the piston in an expandable piston ring compressor