Sierra International 18-2945-9 Marine Drain Screw Gasket, Pack of 2 Sierra Drain Screw Gasket Meets or exceeds the original equipment quality Sierra part number: 18-2945-9 Interchangeable with the following: Chrysler/Force/US Marine F8186, F50556, F8077, 12-19183, Evinrude/Johnson 307552, Mallory 9-60101, 9-60102, Mercruiser 12-20260B, 12-19183B, 12-20260, 12-19183, 12-191832, 12-191833, Mercury 12-191833, 12-20260, 12-19183, 12-191832