Upgrade your Stihl brushcutter with the Genuine Stihl Gasket for FS40 and FS50 (Part Number 4128 129 0900). This OEM sealing component is designed for small two-stroke Stihl machines and helps prevent air and fluid leaks by forming a proper seal between mating engine parts. Built from a durable fuel- and heat-resistant composite material, it supports correct compression and intake sealing for reliable performance. Ideal for replacement and maintenance to keep your Stihl brushcutter running as intended.
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