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.
Bore Size: 2.875/STD
Interchangeable with Mallory 9-54217 and Mercury Marine 39-45155A12, 39-78816A12
Includes three piston rings
Each Sierra product meets or exceeds the original equipment part it replaces