391416 OMC PISTON-RING SET

The 391416 is a 0.030 inch oversize piston ring set for OMC Johnson/Evinrude inline 3-cylinder loop charge engines with original bore size of 3.1875 inches. This oversize set contains compression rings and oil control rings for pistons that have been bored to accommodate oversized rings, typically needed for worn or damaged cylinders. Compatible with Johnson and Evinrude models from 35 to 70 horsepower. Contains 2 rings per piston. Equivalent to Sierra 18-3915.