Carburetor for STIHL FS75 FS80 FS85 KM80 KM85 FC75 String Trimmers (Carburetor + Air Filter Cover) — Tuning Kit Component Key benefits Optimizes the fuel–air mixture so the engine burns fuel more efficiently, reducing fuel consumption and lowering emissions. Improves cold and hot starts, making the engine easier to start and quicker to respond after idling. Stabilizes engine RPM for smoother operation and steadier cutting performance. Increases throttle response and acceleration, delivering noticeable improvement in engine power under load. Atomizes fuel effectively to ensure consistent combustion and reliable running. What’s included Replacement carburetor compatible with STIHL FS75, FS80, FS85, KM80, KM85, FC75 models. Air filter cover included as part of the kit. Designed for use as a tuning/upgrade kit component or direct replacement. Compatibility and function Directly compatible with the listed STIHL trimmer and Kombi engine models (FS75, FS80, FS85, KM80, KM85, FC75). Functions: mixture optimization, fuel atomization, easier starting, RPM stabilization, and improved acceleration/power. Performance and practical advantages Restores lost power and responsiveness on older equipment by replacing a worn or clogged carburetor. Helps achieve smoother idling and fewer stalls during low-speed work. Can be used as part of a tuning kit to boost cutting efficiency and maintain higher effective cutting speed under load. Typical use scenarios Replacing a faulty carburetor on an FS85 after poor starting and inconsistent throttle response to restore reliable performance. Upgrading the KM80 Kombi unit as part of routine maintenance to improve acceleration when using heavy-duty attachments. Installing as part of a tuning kit on an FC75 trimmer used for frequent, intensive yard work to achieve more consistent power and reduced fuel use. Installation notes Intended as a direct replacement; install according to STIHL service guidelines or have a qualified technician perform the replacement. Check gaskets and mounting hardware during installation and replace as needed to prevent air leaks. Why choose this part Specifically matched to the STIHL model numbers listed, providing a targeted solution to starting, idling, and power issues without unnecessary modification. Offers measurable improvements in fuel efficiency, emissions, and usable power when fitted correctly.