Sierra 18-1213 Timing Cover Seal The Sierra 18-1213 Timing Cover Seal is interchangeable with the following: Evinrude/Johnson 912989, 0914817, 3853341, Mallory 9-61610, Mercruiser FI1100622, FI1101014, 35603, 49951, 59341, 59341A1, Volvo Penta 3853341. Each Sierra product meets or exceeds the original equipment part it replaces. Sierra Timing Cover Seal Meets or exceeds the original equipment quality Sierra part number: 18-1213 Interchangeable with the following: Evinrude/Johnson 912989, 0914817, 3853341, Mallory 9-61610, Mercruiser FI1100622, FI1101014, 35603, 49951, 59341, 59341A1, Volvo Penta 3853341