2003+ Suzuki DF9.9/DF15 four stroke outboard motors service manual, Page 137Get this manual
POWER UNIT
1st ring and 2nd ring 1Apply the engine oil to the piston rings2Install the 2nd ring and the 1st ring to the piston!Install the 2nd ring to the piston with the "R" mark toward the piston head side Install the 1st ring to the piston with its original directionThere is no I.Dmark on the standard size 1st ring
1st ring
2nd ring
1st ring