Includes 2 standard size piston rings.
Part #391170
Fits Johnson and Evinrude Outboard Motors
Sierra 18-3913 replaces OMC 391170.
OMC 385810 supersedes to 391170.
Fits over 500 Johnson/Evinrude outboards from the 1970s, 1980s, 1990s. 35 40 45 48 50 55 70 HP.