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- 4180 129 0907 STIHL Gasket – Genuine OEM Part
Description
4180 129 0907 STIHL Gasket – Genuine OEM Part
The STIHL Gasket (4180 129 0907) is a genuine OEM replacement gasket designed for use on select STIHL professional trimmers, brushcutters, edgers, hedge trimmers, and KombiMotor units.
This gasket is used in the muffler and air filter area depending on model configuration. It provides a proper seal to prevent air or exhaust leaks, helping maintain correct engine performance, efficiency, and reliable operation.
Manufactured to STIHL factory specifications, this gasket ensures correct fitment, durability, and long service life.
Replacing a worn or damaged gasket helps restore proper sealing and prevents performance loss or running issues.
Product Details
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OEM Part Number: 4180 129 0907
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Brand: STIHL (Genuine OEM)
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Part Type: Gasket
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Application: Muffler / Air filter sealing gasket (model-specific)
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Condition: New Genuine OEM Part
Function
This OEM gasket is designed to:
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Provide a secure seal between muffler and engine components
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Prevent air or exhaust leaks
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Maintain proper airflow and exhaust efficiency
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Support consistent engine performance
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Replace damaged or leaking gaskets
⚠️ A leaking gasket may cause power loss, overheating, or poor running conditions.
Verify Fitment (Recommended)
Before ordering, confirm:
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OEM part number 4180 129 0907
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Correct placement in muffler or air filter assembly
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Engine size (Ø 38 mm or Ø 40 mm where specified)
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Fitment matches your STIHL illustrated parts diagram
⚠️ Always verify fitment by OEM part number, as gasket applications vary by model and configuration.
Compatibility
Fits select STIHL models and configurations, including:
Trimmers / Brushcutters
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FS 91 / FS 91 R / FS 91.0 – Muffler, Air filter
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FS 111 / FS 111 R / FS 111 RX – Muffler, Air filter
Edgers
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FC 91 – Muffler, Air filter
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FC 96 – Engine Ø 38 mm
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FC 111 – Muffler, Air filter
KombiMotors
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KM 91 R – Muffler, Air filter
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KM 111 R – Muffler, Air filter
Hedge Trimmers / Pole Pruners
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HT 102 – Engine Ø 40 mm
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HT 105 – Engine Ø 40 mm
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HT 134 – Muffler, Air filter
(Exact application depends on configuration and engine size — verify using OEM parts diagram.)
Installation Notes
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Remove muffler or air filter housing as required
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Clean all sealing surfaces thoroughly
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Install gasket 4180 129 0907 in the correct position
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Reassemble components securely to factory specifications
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Inspect for leaks after installation
⚠️ Always replace gaskets when components are removed.
Maintenance Tips
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Inspect gaskets during routine service
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Replace gaskets showing compression or damage
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Use only genuine STIHL OEM gaskets for correct fit and sealing performance
