Products Description
FS38/FS55 Brush Cutter Gasket Set – Complete Engine Sealing Components
Essential Gasket Kit for Stihl FS38, FS55 & Compatible Trimmers
This gasket set provides the critical sealing components required for engine maintenance and repair on Stihl FS38, FS55, and compatible brushcutters and blowers. The gaskets form the vital seals between the carburetor, cylinder, and crankcase, preventing air leaks, maintaining proper compression, and ensuring the engine runs reliably. Over time, gaskets can become brittle, compressed, or damaged from heat, vibration, and fuel exposure, leading to hard starting, erratic idling, and loss of power. This comprehensive kit allows you to replace all wear-prone sealing components in a single service operation, restoring the engine to proper operating condition across a wide range of Stihl equipment.
Technical Profiles & Materials
Complete Sealing Component Set – This gasket kit includes the essential sealing components needed for engine service. The set typically includes a cylinder base gasket (OEM 4140 029 2300), which seals the cylinder to the crankcase, and is essential for maintaining proper compression and preventing air leaks . Carburetor mounting gaskets (OEM 4140 120 0900 and 4140 129 0900) are also included, providing a leak-free seal between the carburetor and the intake manifold .
OEM-Spec Replacement Fitment – Manufactured to meet original equipment specifications, these gaskets ensure a perfect fit for Stihl FS38, FS45, FS55, and compatible models. The cylinder base gasket replaces OEM part number 4140 029 2300, which is confirmed compatible with an extensive range of Stihl models including FS38, FS45, FS55, BG55, KM55, HL45, and HS45 series . The carburetor gasket replaces OEM 4140 129 0900, fitting FS38, FS55, BG45, BG85, HS45, and many other models .
Heat & Fuel-Resistant Materials – Constructed from high-quality materials designed to withstand the heat, vibration, and fuel exposure common in brushcutter engines. The gaskets maintain their sealing properties over extended service intervals, preventing premature failure and ensuring long-lasting performance.
Technical Specifications
| # | Parameter | Specification |
|---|---|---|
| 1 | Cylinder Gasket OEM | 4140 029 2300 |
| 2 | Carburetor Gasket OEM | 4140 129 0900 |
| 3 | Carburetor Gasket (Alternate) | 4140 120 0900 |
| 4 | Compatible Models | FS38, FS45, FS55, FS75, FS80, FS85, BG55, BG85, KM55, HL45, HS45 and many others |
| 5 | Gasket Types | Cylinder base gasket, carburetor mounting gaskets |
| 6 | Material | Heat & fuel-resistant composite materials |
| 7 | Function | Engine sealing, air leak prevention |
| 8 | Unit of Sale | Individual or complete kit |
Products Application
Full Engine Overhaul
When performing a complete engine rebuild or cylinder replacement on FS38/FS55 brushcutters, this gasket set provides all necessary sealing components. The cylinder base gasket (4140 029 2300) is essential for maintaining proper compression and preventing crankcase leaks. Replacing all gaskets simultaneously ensures the engine maintains proper compression and crankcase pressure, preventing performance issues and extending engine life .
Carburetor Service
When removing the carburetor for cleaning, repair, or replacement, the carburetor mounting gasket must be renewed to prevent air leaks. A damaged or reused gasket can cause hard starting, erratic idling, and lean running conditions that may lead to engine seizure. The carburetor gasket (4140 129 0900) is confirmed compatible with FS38, FS55, BG45, BG85, HS45, and many other Stihl models . This set includes the correct carburetor gasket for a proper seal.
Complete Service Kits
Comprehensive kits are available that combine gaskets with other essential service items, including the carburetor body, primer bulbs, air filters, fuel filters, and spark plugs in one package . These kits provide a complete fuel and ignition system service, simplifying maintenance and ensuring all related wear items are renewed simultaneously. The complete carburetor kit fits FS38, FS45, FS46, FS55, FS74, FS75, FS76, FS80, FS85, and compatible models .
Quality and Craftsmanship Details
Products Package
About Us
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FAQ
Q: How do I confirm this gasket set fits my brushcutter?
A:Check your machine model number on the housing. This gasket set is compatible with Stihl FS38, FS45, FS55, BG55, KM55, HL45, HS45, and many other models . The cylinder gasket (4140 029 2300) fits FS38, FS45, FS55, FS75, FS80, FS85, BG55, BG85, FC55, KM55, HS45, and an extensive range of Stihl equipment . The carburetor gasket (4140 129 0900) fits FS38, FS55, BG45, BG85, HS45, and many other models .
Q: What are the symptoms of a failed gasket on a brushcutter?
A: Common symptoms include hard starting, erratic idling, engine surging, loss of power, and fuel or exhaust leaks. A failed cylinder base gasket can cause loss of compression, while a failed carburetor gasket can allow air leaks that cause lean running conditions and potential engine damage.
Q: Can I reuse old gaskets when servicing the engine?
A: It is not recommended to reuse old gaskets. Once removed, gaskets are often compressed, deformed, or damaged, and may not provide a proper seal. Reusing old gaskets can lead to air leaks, fuel leaks, and poor engine performance. Always replace gaskets with new components during engine service.
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