Description
4140 129 0900 STIHL Gasket Genuine OEM Part
The STIHL Gasket (4140 129 0900) is a genuine OEM sealing gasket designed for use in the carburetor and air filter assemblies of a wide range of STIHL handheld equipment. This gasket helps maintain a proper seal between intake components, supporting correct airflow, stable fuel mixture, and reliable engine performance.
Manufactured to STIHLs exact factory specifications, this OEM gasket provides correct fitment, dependable sealing, and long-lasting durability when replacing worn, torn, or leaking gaskets.
Product Details
OEM Part Number: 4140 129 0900
Brand: STIHL (Genuine OEM)
Part Type: Gasket
Application: Carburetor / Air Filter / Intake System
Condition: New Genuine OEM Part
Function
This gasket is designed to:
Seal intake and air filter / carburetor connections
Help prevent air leaks that cause lean running
Maintain stable idle and smooth engine performance
Replace worn, torn, or leaking OEM gaskets
Restore safe and reliable equipment operation
An air leak from a damaged gasket may cause hard starting, surging, overheating, or loss of power.
Verify Fitment in 30 Seconds
Before ordering, confirm the following:
OEM part number 4140 129 0900
Your STIHL model is listed below
Part location matches your carburetor / air filter diagram
Always verify fitment by OEM part number for best accuracy.
Compatibility
Fits a wide range of STIHL equipment, including:
Trimmers / Brushcutters
FS 38
FS 45
FS 45 D
FS 45 C-E
FS 46
FS 46-D
FS 46 C-E
FS 46 C-E D
FS 55
FS 55 R
FS 55 R-D
FS 55-D
FS 55 C-E D
FS 55 RC-E
FS 55 RC-E D
FS 90 (4180)
FS 90 R (4180)
FS 100 RX
FS 110
FS 110 R
FS 110 RX
Kombi Tools
KM 55 R
KM 55 R-D
KM 55 RC-E
KM 55 RC-E D
KM 90 R
KM 110 R
Edgers
FC 55
FC 55-D
FC 90
FC 95
FC 100
FC 110
Pole Pruners
HT 100
HT 101
Hedge Trimmers / Long-Reach Units
HL 45
HL 45-D
HL 90 K
HL 100
HL 100 K
HS 45
HS 81 R
HS 81 T
HS 81 TC-E
HS 86 R
HS 86 T
Blowers / Backpack Units
BG 45
BG 45 C KAT
BG 46
BG 46-D
BG 50
BG 55
BG 55 C KAT
BG 65
BG 65-D
BG 85
BG 85-D
BR 45 C
Shredders / Vacuum Units
SH 55
SH 85
SH 85-D
Multi-Tools
MM 55
MM 55 C-E
Other
BT 45
This list includes common applications always confirm using your parts diagram or owners manual.
Installation / Usage
Turn off engine and allow it to cool
Remove air filter housing / carburetor components as needed
Remove the old gasket carefully
Clean mating surfaces thoroughly
Install STIHL OEM gasket 4140 129 0900
Reassemble securely and evenly
Test engine operation for leaks and stable idle
Professional installation is recommended if unsure.
Maintenance Tips
Replace gaskets anytime intake components are removed
Inspect for air leaks if engine surges or runs lean
Keep air filter clean to protect intake system
Use only genuine STIHL OEM sealing parts for best reliability
