Carburetor Kit / Zama RB-40Pack Size:1Zama RB-40NHC 203-5871, Oregon 49-907, Oregon 49-437Zama C1Q-S33,A-B; C1Q-S34, A-H; C1Q-S35, A-B; C1Q-S36, A-G; C1Q-S51, A-C; C1Q-SK4; C1Q-SK5; C1Q-SK6, A; C1U-SK7 carburetors Not compatible with greater than 10% ethanol fuel