Sierra 18-3902 Marine Piston Ring For Mercury/Mariner Outboard Motor

Description

Sierra’S 18-3902 Piston Rings Are Designed For Use In Mercury Marine Applications. It Is Interchangeable With Mallory 9-54217 And Mercury Marine 39-45155A12, 39-78816A12. Each Sierra Product Meets Or Exceeds The Original Equipment Part It Replaces.