Hipa RB-100 Carburetor Repair Kit with 188-13 Primer Bulb for STIHL HS45 FS55 FS38 BG45 MM55 4137 EMU Series

The Hipa RB-100 Carburetor Repair Kit is a thoughtfully assembled set designed to refresh select STIHL carburetors. Instead of replacing a whole carb, you can target wear parts with precision components that restore throttle response and idle stability, helping your outdoor tools perform closer to their original feel.

Why choose the Hipa RB-100 kit

Built for durability and ease of use, this rebuild kit brings together essential components into one convenient package. The diaphragm, needle, and seals are designed to work in harmony, reducing leaks and promoting consistent fuel delivery. The kit’s compact, organized contents make it straightforward to perform routine maintenance with confidence rather than guesswork.

In real-world use, you might notice quicker starts on cool mornings, crisper throttle response during edging or trimming, and steadier idling after a rebuild. The RB-100 is compatible with a range of ZAMA and STIHL carburetors, so it can support multiple machines in a single season, potentially saving time and inventory space.

• Carburetor diaphragm assembly for restored metering and reliable startup
• Needle & seat to control fuel flow and stabilize idle speed
• Gasket set for secure, leak-free seals under varying temps
• Primer valve assembly to simplify starting procedure and reduce effort
• Essential repair hardware included for a complete rebuild without extra trips

What’s included and compatibility

The kit contains all the core components needed for a thorough rebuild: diaphragm assembly, needle & seat, gasket set, primer valve assembly, and the essential hardware. It is designed for STIHL models like HS45, FS55, FS38, BG45, MM55, and 4137 EMU Series, with attention to the RB-100 part code for accurate matching. Before ordering, double-check your engine’s model number and part number to minimize returns and exchanges.

To get the best results, follow the included guidance for disassembly, part replacement, and reassembly. When reinstalled on the engine, test for smooth starts, consistent idle, and dependable throttle response. The kit provides a practical, cost-conscious path to extending the life of your carbureted tools without sacrificing performance.