Carburetor Kit replaces RB-66, RB66. For C1Q-S28, 29, 30, 41, 42, 44 & 45 Model Carburetors on Replaces Stihl. Fits C1Q-528, A-D, C1Q-52D, A-C, C1Q-530, A-C, C1Q-544 A and C1Q-543. Replaces Stihl models FH75, FC75, HL75, FS75, FS80, FS85, HT70, HT75,...