Description
4180 121 6601 STIHL Lever Genuine OEM Part
The STIHL Lever (4180 121 6601) is a genuine OEM replacement carburetor lever designed for use on select STIHL professional trimmers, brushcutters, hedge trimmers, and KombiMotor units.
This lever is installed inside the carburetor assembly and plays an important role in controlling fuel metering and throttle-related movement, depending on carburetor configuration. Proper lever operation is essential for smooth fuel delivery and stable engine performance.
Manufactured to STIHL factory specifications, this lever provides the correct dimensions, strength, and durability required for reliable carburetor function.
Replacing a worn, bent, or damaged lever helps restore proper carburetor operation and prevents running or starting issues.
Manufactured to STIHL OEM standards, this lever ensures correct fitment and long service life.
Product Details
OEM Part Number: 4180 121 6601
Brand: STIHL (Genuine OEM)
Part Type: Lever
Application: Carburetor internal control lever (model-specific)
Condition: New Genuine OEM Part
Function
This OEM lever is designed to:
Support proper carburetor fuel metering operation
Maintain smooth throttle and fuel control
Replace worn or damaged carburetor levers
Help ensure consistent engine performance
Prevent starting or running issues
A damaged carburetor lever may cause poor performance, flooding, or hard starting.
Verify Fitment (Recommended)
Before ordering, confirm:
OEM part number 4180 121 6601
Carburetor application matches your model
Application matches your STIHL parts diagram
Always verify fitment by OEM part number and carburetor diagram, as internal components vary by configuration.
Compatibility
Fits select STIHL models and carburetor configurations, including:
FS 91
FS 91 R
FS 91.0
FS 111
FS 111 R
FS 111 RX
FS 131
FS 131 R
FS 131.0
FS 131.0 R
(FS 311 and FS 131 series may use Carburetor 4180/20)
FC 91
FC 96
FC 111
KM 91 R
KM 111 R
KM 131 R
HT 102
HT 105
HT 131
HT 132
HT 133
HT 134
HT 135
BT 131
FB 131
FS 311 (Carburetor 4180/20)
(Exact application varies by carburetor type and configuration verify using OEM parts diagram.)
Installation Notes
Remove carburetor from engine as required
Disassemble carburetor carefully
Replace lever 4180 121 6601 in correct position
Ensure proper movement and seating
Reassemble carburetor and adjust if necessary
Carburetor service should be performed by a qualified technician.
Maintenance Tips
Keep fuel system clean to prevent carburetor wear
Inspect carburetor components during service intervals
Use only genuine STIHL OEM carburetor parts for correct fit and durability
