Amazon.com: Fuel Filler Petrol Gas Tank Cap Plug Oil Filter For STIHL FC70 FC70C FS40 FS40C HS46 HS56C MS261 MS271 FS50 String Trimmer Parts : Patio, Lawn & Garden
Genuine Stihl FS 40 / FS40 Fuel / Petrol Filler Cap - pn 0000 350 0532 | eBay
How to run and operate Grass Trimmer Stihl FS 40 - YouTube
Amazon.com: Replacement Part for M.C Fuel Tank Cap Cover for Stihl FC70C FS40 FS40C FS50 FS50RC FS56 FS56C : Tools & Home Improvement