Briggs & Stratton 273186S Carburetor Body Gasket Replaces 271607/273186 Briggs & Stratton 273186S Genuine Briggs & Stratton Carburetor Body Gasket Replaces Old Briggs # 273186, 271607, 273186S 20 Gross HP Opposed Twin Engines, After Code Date 96102000, 422000 Model Briggs & Stratton Engines