Price Match GuaranteeStihl String Trimmer Carburetor Parts
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Multiple models matched. Select your model to confirm fit.
Primer bulb. The primer bulb draws fuel into the carburetor to make the engine easier to start.
Walbro primer bulb. The primer bulb draws additional fuel into the carburetor to make the engine easier to start. If the primer bulb is leaking, replace it.
Primer bulb (or purge bulb) assembly. The primer bulb draws fuel into the carburetor to make the engine easier to start. The short port on the primer bulb is the inlet. The longer port is the outlet back to the fuel tank.
Small engine carburetor gasket and diaphragm kit. If the engine runs rough, then the carburetor may need to be cleaned, rebuilt, or replaced.
Carb kit
Carburetor kit
Carb kit zama rb105
Rebuild Kit
Rebuild Kit
Stihl String Trimmer Carburetor Parts
The carburetor is the #1 reason a Stihl string trimmer won't start, runs rough, or stalls during use. Ethanol in modern fuel damages the internal float, needle, and jet passages — corrosion buildup blocks fuel flow and starves the engine. A carburetor rebuild kit is often enough to restore your Stihl trimmer without a full replacement.
If your FS45, FS55, FS90, or FS131 has been sitting for more than a season, or if it cranks but won't catch, carburetor service is almost always the fix. Repair Clinic stocks OEM Stihl carburetor kits, complete carburetors, and individual parts to get your trimmer running again.
- Hard start or won't start: Fuel system blockage; rebuild kit clears jets and passages
- Runs rough or surges: Float stuck or needle worn; full carburetor replacement recommended
- Stalls at idle: Idle jet clogged; rebuild kit or full carb
- Cuts out under load: Main jet restricted; rebuild kit or full carb
- Rich black smoke: Float stuck open or needle leaking; full carburetor replacement
Enter your Stihl trimmer model number to find the correct OEM carburetor, rebuild kit, or individual parts — Stihl parts fit right and work first time.
Find Replacement Stihl String Trimmer Carburetor Parts Online by Model or Part Number
Stihl String Trimmer Carburetor Parts — Frequently Asked Questions
What's the difference between a carburetor rebuild kit and a full carburetor replacement?
A rebuild kit includes the gaskets, seals, float, needle, and jet parts that ethanol damage most often attacks. If your carburetor body is not cracked and the barrel valve moves freely, a rebuild kit ($15 to $30) saves money and labor. A full OEM carburetor ($60 to $120) is the right choice if the body is damaged, the float won't pivot, or if the rebuild kit didn't restore proper running. Stihl trimmer carburetors are not field-repairable on every model — some require full replacement.
How do I know if my Stihl trimmer carburetor is the problem?
If the trimmer cranks but won't stay running, or if it starts only when you spray carburetor cleaner into the air intake, the carburetor is almost certainly the culprit. Stihl also recommends draining fuel if the machine will sit for more than 30 days — old fuel gums up carbs quickly. If you've run fresh fuel and the trimmer still won't fire, carburetor service is your next step.
Do I need the exact OEM Stihl carburetor, or will an aftermarket part work?
OEM Stihl carburetors are engineered for your specific model's engine size, fuel delivery rate, and idle characteristics. Aftermarket carburetors often have slightly different jet sizes or float levels, leading to running issues, hard starts, or poor fuel economy. Repair Clinic carries genuine Stihl OEM carburetors and rebuild kits — they fit your model precisely and come backed by Stihl engineering.
How do I find my Stihl trimmer model number for the correct carburetor?
The model number is stamped on the fuel tank or printed on a label near the engine. It will be something like FS45, FS55, FS90, or FS131. Enter your model number in the Repair Clinic lookup tool to see your exact carburetor, rebuild kit, and related fuel system parts. If you can't locate the model number, a photo of the trimmer helps our parts specialists identify the correct OEM carburetor.
Order Stihl String Trimmer Carburetor Parts Online
Ensure your Stihl string trimmer operates efficiently by ordering genuine carburetor parts online. Our full inventory of Stihl string trimmer carburetor parts supports compatibility and performance. With same-day shipping, you can quickly receive the necessary parts to restore your equipment's functionality. Easily locate the right part using our model number lookup and enjoy the benefits of our No-Hassle 365-Day Returns and Price Match Guarantee. Common issues like a clogged carburetor can cause your trimmer to stall or run rough. Rebuilding or replacing the carburetor can solve these problems, restoring reliable operation. For assistance with String Trimmer Repair, visit our repair help section. Also, find Stihl String Trimmer Carburetor Parts to find exactly what you need for your repair.
Stihl String Trimmer Model Number: Where to Look
Stihl typically prints the model number on the fuel tank or on a label near the engine. Depending on the trimmer, you may also find it stamped on the main housing or beneath the engine cover. Look for a code such as FS 45, FS 55, FS 90, or FS 131, and copy every letter and number exactly as shown. Enter that code in the Repair Clinic search bar to narrow the full Stihl String Trimmer parts catalog to parts that fit your specific unit, including carburetor and fuel system parts. Using the complete model number helps you avoid comparing incompatible versions and gets you to a reliable match faster.
Online Diagnostic and Repair Help for Stihl String Trimmer
Repair Clinic's online resources cover Stihl String Trimmer diagnostic work, part testing, and installation in one place. Symptom articles help you understand what is likely going wrong, video walkthroughs show the disassembly and reassembly, and step-by-step written repair guides let you follow along in your own time. Use the model number lookup to confirm the exact OEM part, and wiring diagrams support the more involved jobs.
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