Products Description
FS38/FS45/FS46/FS55/FS74/FS75/FS76/FS80/FS85 Brush Cutter Carburetor
Direct Replacement Carburetor for Stihl FS Series Brushcutters & Trimmers
This replacement carburetor is a direct-fit solution for a wide range of STIHL FS series brushcutters, including FS38, FS45, FS46, FS55, FS74, FS75, FS76, FS80, FS85, and compatible models such as FC55, HS45, HL45, and KM55 . It is designed to replace Zama carburetors with part numbers including C1Q-S66, C1Q-S71, C1Q-S97, C1Q-S143, C1Q-S153, C1Q-S186, and Stihl OEM references 4140 120 0612 and 4140 120 0619 . The carburetor is the heart of the engine's fuel system, responsible for precisely metering the air-fuel mixture for reliable starting, smooth idling, and consistent power delivery . Over time, old fuel leaves behind sticky varnish that can clog internal passages, leading to hard starting, stalling, and poor performance . This replacement restores proper fuel flow and engine function.
Technical Profiles & Materials
OEM-Spec Design – This carburetor is manufactured to meet or exceed original equipment specifications, ensuring a perfect fit for the STIHL FS38, FS45, FS46, FS55, FS74, FS75, FS76, FS80, and FS85 brushcutters . Many aftermarket options have undergone wet flow testing to simulate and improve real engine performance .
Broad Model Compatibility – In addition to the models listed, this carburetor is compatible with Stihl FS45C, FS46C, FS55C, FS55R, FS55RC, FC55, HS45, HL45, KM55, KM55R, and many other variants . It is suitable for use on brushcutters, hedge trimmers, and Kombi motors .
Direct Replacement Fitment – This is a straightforward bolt-on replacement designed to simplify installation. The mounting, throttle linkage, and fuel inlet connections are configured to match the original carburetor exactly .
Technical Specifications
| # | Parameter | Specification |
|---|---|---|
| 1 | Compatible Models | STIHL FS38, FS45, FS46, FS55, FS55R, FS74, FS75, FS76, FS80, FS85 |
| 2 | Also Compatible | FS55C, FS55RC, FS45C, FS46C, FC55, HS45, HL45, KM55, KM55R |
| 3 | Zama Carburetor References | C1Q-S66, C1Q-S71, C1Q-S97, C1Q-S143, C1Q-S153, C1Q-S186 |
| 4 | OEM References | 4140 120 0612, 4140 120 0619, 4137-120-0606, 4137-120-0608 |
| 5 | Kit Contents (Typical) | Carburetor, 2 gaskets, 2 primer bulbs, fuel filter, fuel line, air filter, spark plug |
| 6 | Material | Aluminum Alloy / Metal |
| 7 | Height (Typical) | Approx. 30mm |
| 8 | Unit of Sale | 1 piece or complete service kit |
Products Application
STIHL Brushcutter Performance Restoration
Direct replacement when the original carburetor becomes clogged or damaged by old fuel residue, ethanol varnish, or age-related wear . Symptoms include the engine being hard to start, stalling after starting, rough idling, hesitation on acceleration, or a loss of cutting power .
Complete Service & Maintenance Kit
The comprehensive kits available are ideal for repair centers, landscapers, and DIY owners who want to perform a complete service . The included air filter, fuel line, fuel filter, spark plug, and primer bulb ensure all related service items are renewed simultaneously, preventing future failures and maximizing engine performance .
Multi-Model Workshop Inventory
For repair centers and equipment servicing fleets, this carburetor simplifies parts inventory by covering a wide range of Stihl FS, FC, HS, HL, and KM series equipment . This single carburetor serves multiple models, streamlining service operations and reducing the need to stock multiple part numbers .
Quality and Craftsmanship Details
Products Package
About Us
As a premier garden machinery parts supplier, Jiaxing Norsun Trading Co., Ltd. bridges global distributors with over 100 vetted China manufacturers. We streamline your B2B supply chain through strict quality control, flexible production, and factory-direct wholesale pricing. Partner with us for reliable, high-volume sourcing of precision-engineered outdoor power equipment components.
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FAQ
Q: How do I confirm this carburetor fits my specific Stihl model?
A:Check your equipment model number on the housing and, if possible, the part number on your old carburetor. This carburetor is compatible with STIHL FS38, FS45, FS46, FS55, FS74, FS75, FS76, FS80, FS85, and many other models . Some aftermarket carburetors are noted to be compatible with models manufactured before 2013 , so verify your specific model and serial number.
Q: What are the symptoms that indicate a carburetor replacement is needed?
A: Common symptoms include hard starting, the engine stalling after starting, rough idling, hesitation on acceleration, and a noticeable loss of cutting power. These issues are frequently caused by clogged internal passages from old fuel residue . If cleaning and tuning do not resolve the problem, replacing the carburetor is often the most effective solution.
Q: What is included in a complete carburetor service kit?
A: Comprehensive kits typically include the carburetor, 2 mounting gaskets, 2 primer bulbs, a fuel filter, a fuel line, an air filter, and a spark plug . This provides all components needed for a full fuel and ignition system service in one package.
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