Sierra 18-2619-1 MerCruiser Outdrive Gasket SetSierra high quality engine parts are designed to meet or exceed OEM requirements. For MerCruiser R, MR, Alpha and Alpha One Gen II Outdrives (1983 and Newer) (s/n 6225577 & up).; Kit Includes: (1) 18-2743 Outdrive Mounting Gasket; (1) 18-2840 Bell Housing Gasket; (1) 18-7153 O-Ring; (1) 18-7170 O-Ring; (1) 18-7117 O-Ring; Replaces: GLM; 39620; Mallory; 9-62601; 9-62601-25; MerCruiser Stern Drive; 27-94996A20; 27-94996; 27-94996A1; 27-64818A2; 27-949962; 27-64818A3; 27-94996A2; 27-94996Q2;