[Lifetime Warranty] FS 91 R Trimmer Carburetor Kit - Compatible with STIHL FS91R FS91 FC91 FS111 FC111 KM91R KM111R HT102 FC96 Trimmer Brushcutter 4180-120-0615 Carb

FS 91 R Trimmer Carburetor Kit Key Features Complete replacement kit includes carburetor, air filter, fuel filter, fuel lines, grommet, primer bulb, and spark plug. Designed as a direct-fit replacement for the original equipment manufacturer (OEM) part. Pre-calibrated from the factory; minor adjustments may be necessary for optimal performance based on altitude and fuel mixture. Replaces / Cross-Reference Part Numbers 4180-120-0615 4180 120 0615 41801200615 Compatibility & Fitment STIHL Trimmers / Brushcutters:FS89, FS89R, FS91, FS91R, FS111, FS111R, FS111RX STIHL Edgers:FC91, FC96, FC111 STIHL Kombi Engines:KM91, KM91R, KM111, KM111R STIHL Pole Pruners:HT102, HT103 When to Replace Engine fails to start or experiences difficult starting. Engine stalls frequently, idles roughly, or will not hold an idle. Noticeable loss of power or poor acceleration during operation. Fuel leaks from the carburetor body. Excessive black smoke emitted from the exhaust. Installation Tips Verify compatibility with your specific model number before starting installation. Drain all fuel from the tank before servicing the fuel system. Document the routing of fuel lines and throttle linkage with photos before disassembly. It is recommended to replace the fuel filter and fuel lines when installing a new carburetor. After installation, check for fuel leaks and start the engine. Adjust idle and fuel mixture screws as needed for smooth operation.