Products Description
FS38/FS55/FS75/FS85/BG55/SP81 Brush Cutter Carburetor Repair Kit
Complete Rebuild Kit for Zama & Walbro Carburetors on Stihl Equipment
This carburetor repair kit provides the essential gaskets, diaphragms, and sealing components needed to rebuild the carburetor on a wide range of Stihl brushcutters, blowers, hedge trimmers, and compatible equipment. Designed for Zama C1Q series and Walbro WT series carburetors commonly found on FS38, FS55, FS75, FS85, BG55, SP81, and many other models, this kit addresses the most common cause of poor engine performance-degraded diaphragms and gaskets from ethanol-blended fuel exposure. Rebuilding your existing carburetor with this kit is a cost-effective alternative to purchasing a complete new carburetor, restoring reliable starting, smooth idling, and consistent power delivery.
Technical Profiles & Materials
OEM-Spec Replacement Fitment – Manufactured to meet original equipment specifications, this repair kit ensures a perfect seal and precise fuel metering for Zama and Walbro carburetors. Replaces genuine Stihl part numbers including 4140 007 1060 and 4133 007 1060 . Some aftermarket kits are equivalent to Zama RB-100 and RB-106 references, providing the same components as OEM rebuild kits.
Comprehensive Component Set – The kit includes all essential parts for a full carburetor overhaul: metering diaphragms, pump diaphragms, gaskets (mounting and internal), inlet needle valve, metering lever, spring, and fuel strainer. Some kits also include primer bulbs and additional sealing components.
Fuel-Resistant Materials – Components are manufactured from fuel-resistant rubber, reinforced paper, and precision metal parts designed to withstand exposure to gasoline, ethanol blends, and engine heat. The durable construction ensures long service life and reliable sealing performance.
Technical Specifications
| # | Parameter | Specification |
|---|---|---|
| 1 | OEM Kit References | 4140 007 1060, 4133 007 1060 |
| 2 | Zama Equivalent | RB-100, RB-106, GND-98 |
| 3 | Compatible Carburetor Series | Zama C1Q series, Walbro WT series |
| 4 | Compatible Models | FS38, FS45, FS46, FS55, FS75, FS80, FS85, BG55, SP81, and many others |
| 5 | Kit Contents | Metering diaphragm, pump diaphragm, gaskets, needle valve, lever, spring, strainer |
| 6 | Material | Fuel-resistant rubber, reinforced paper, metal |
| 7 | Unit of Sale | 1 complete kit |
| 8 | OEM Option | Genuine Stihl parts available |
Products Application
Stihl Brushcutter Performance Restoration
Direct replacement when the engine exhibits hard starting, stalling after starting, rough idling, hesitation on acceleration, or loss of cutting power. These symptoms are frequently caused by diaphragms that have hardened or degraded due to ethanol-blended fuel exposure . Rebuilding the carburetor with this kit restores precise fuel metering and reliable performance on FS38, FS55, FS75, FS85, and compatible models.
Blower & Hedge Trimmer Maintenance
For BG55, BG85 blowers and HS45, HS75, HS85 hedge trimmers, the carburetor rebuild kit resolves common issues such as poor throttle response, surging, and difficulty starting after storage . The comprehensive kit ensures all wear-prone sealing components are renewed, extending the service life of the equipment.
Multi-Model Workshop Inventory
For repair centers and equipment servicing fleets, this kit simplifies parts inventory by covering a wide range of Stihl models including FS, FC, BG, BR, SH, HS, HL, HT, KM, MM, and SP series . This single kit serves multiple equipment types, 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.
Trusted Partnership Power
YOUR PROFESSIONAL ONE-STOP SOURCE
FOR 10000+ OUALITY PARTS
Verified Factory Excellence
BACKED BY 200+ TRUSTED FACTORY PARTNERS
Production process
Quality control
Expo experience
Customer Reviews
FAQ
Q: How do I confirm this carburetor repair kit fits my equipment?
A:Check your equipment model number on the housing and, if possible, the carburetor model stamped on the carburetor body. This kit is compatible with Stihl FS38, FS45, FS46, FS55, FS74, FS75, FS76, FS80, FS85, BG45, BG55, BG85, FC55, FC75, FC85, HL45, HL75, HS45, HS75, HS85, HT70, HT75, KM55, KM85, MM55, SH55, SH85, SP81, and many other models . For Zama carburetors, it fits C1Q series models; for Walbro, it fits WT series .
Q: What are the symptoms that indicate a carburetor rebuild is needed?
A: Common symptoms include hard starting, the engine stalling after starting, rough idling, hesitation on acceleration, surging, and a noticeable loss of cutting power . These issues are frequently caused by diaphragms that have hardened or degraded from ethanol-blended fuel exposure . If cleaning and tuning do not resolve the problem, rebuilding the carburetor with this kit is the recommended solution.
Q: What is included in a typical carburetor repair kit?
A: A comprehensive kit typically includes metering diaphragms, pump diaphragms, gaskets (mounting and internal), inlet needle valve, metering lever, spring, and fuel strainer . Some aftermarket kits also include primer bulbs and additional sealing components. Complete service kits may include fuel filters, fuel lines, air filters, and spark plugs.
Hot Tags: fs38/fs55/fs75/fs85/bg55/sp81 brush cutter carburetor repair kit, China fs38/fs55/fs75/fs85/bg55/sp81 brush cutter carburetor repair kit suppliers, fs38 fs45 fs55 fs85 parts, FS38 FS55 Gasket Set
