FS38 Carburetor Replaces # C1Q-S97, C1Q-S66, C1Q-S71, C1Q-S186, C1Q-S143 C1Q-S153; 4140 120 0612, 4140 120 0619 FS55R Carburetor Compatible with STIHL FS55R FS55 FS55RC FS55C FS55CE FS55T FS55Z ...