Sierra International 18-2946 Head Gasket The Sierra 18-2946 Head Gasket is interchangeable with the following: Chris Craft 16.50-00204, GLM 36150, Evinrude/Johnson 908611, 0914812, 3853336, Mallory 9-63700, Mercruiser FI5000204, 27-810841, 27-52364, OMC 908611, 853336, 0914812, Volvo Penta 908611, 3853336. Sierra Head Gasket Meets or exceeds the original equipment quality Sierra part number: 18-2946 Interchangeable with the following: Chris Craft 16.50-00204, GLM 36150, Evinrude/Johnson 908611, 0914812, 3853336, Mallory 9-63700, Mercruiser FI5000204, 27-810841, 27-52364, OMC 908611, 853336, 0914812, Volvo Penta 908611, 3853336