Description Gasket, carburetor to manifold. Tractors: TO20, TO30, TO35, MF35, F40, MF50, MF135, MF150. Industrials: 202, 204, 2135. This item is a suitable alternative for the following: 181531M2, 181531M1, 181531M91, 181531V2, 830747M91, A-181531M1, A181531M1