Sierra 18-0296 Oil Seal The Sierra 18-0296 Oil Seal is interchangeable with the following: Mallory 9-76411, Mercury 26-83406M, 26-82233M, 26-854017, Yamaha 93101-22067-00, 93101-22M00-00. Each Sierra product meets or exceeds the original equipment part it replaces. Sierra Oil Seal ID: 23mm, OD: 36.25mm, Width: 6mm Sierra part number: 18-0296 Interchangeable with the following: Mallory 9-76411, Mercury 26-83406M, 26-82233M, 26-854017, Yamaha 93101-22067-00, 93101-22M00-00