Sierra International 18-0336 Adapter Plate Gasket Sierra Adapter Plate Gasket Meets or exceeds the original equipment quality Sierra part number: 18-0336 Interchangeable with the following: GLM 32780, Mercury 27-416703, 27-416705, 27-41670006, 27-416704, 27-416703, 27-41670, 27-85111