Fits Briggs & Stratton 2-1/2 to 3-1/2 HP. Fits N, 5S, 6B-F, 6-R, 6B-HS, 6B-H, 6, 6R, 6S, 6B-S, 8, 8F, 8R, 8P, 8B-F, 8B-R, 8B-H, 60100 (2 HP Horizontal): 80299, 80300, 81997, (3 HP Horizontal).