This original Zama carburettor provides factory quality and guarantees ideal metering and precise mixing of fuel and air for your STIHL engine. Made of robust cast metal resistant to wear and to the aggressive additives in modern fuels, this part ensures easy starting, stable idling and clean throttle response. Investing in the original component with precise internal metering parts eliminates problems of unstable running, clogged jets and loss of power, which directly extends the working life of the whole machine. Before fitting the new carburettor, be sure to thoroughly clean the air filter housing and replace the fuel filter in the tank to prevent early ingress of dirt into the sensitive jets. During assembly, carefully inspect the intake neck, seals and fuel hoses, because any damage to them leads to "false" air being drawn in, which leans out the mixture and can cause overheating and severe engine damage. After successful installation, carry out fine adjustment of operation and synchronisation of the throttle cable according to factory specifications. Key characteristics: Part type/size: Carburettor – early type with a lever for the throttle cable (Zama C1Q-S55A) Manufacturer: Zama / STIHL – original part Reference OEM number: 4229 120 0604 / C1Q-S55A Compatible models: STIHL BG 45 STIHL BG 46 STIHL BG 55 STIHL BG 65 STIHL BG 85 STIHL SH 55 STIHL SH 85 Stock and availability of parts can be checked by sending an inquiry or by calling our phone number.