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- 4149 129 0901 STIHL Gasket – Genuine OEM Part
Description
4149 129 0901 STIHL Gasket – Genuine OEM Part
The STIHL Gasket (4149 129 0901) is a genuine OEM engine gasket designed for use on select STIHL trimmers, Kombi tools, and long-reach hedge trimmers (serial number ranges apply).
This gasket is used in the engine sealing area (varies by model) to help prevent air leaks and maintain proper sealing between engine components. Replacing a worn, damaged, or leaking gasket helps support stable engine performance, correct running, and long-term reliability.
Manufactured to STIHL factory specifications, this OEM gasket provides correct fitment, secure sealing, and dependable durability.
Product Details
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OEM Part Number: 4149 129 0901
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Brand: STIHL (Genuine OEM)
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Part Type: Gasket
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Application: Engine sealing area (varies by model)
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Condition: New Genuine OEM Part
Function
This OEM gasket is designed to:
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Provide sealing between engine components
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Help prevent air leaks and performance issues
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Support stable running and correct engine operation
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Replace worn, damaged, or leaking gaskets
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Maintain proper engine performance and long service life
⚠️ A damaged gasket may cause air leaks, poor running, loss of power, or unstable idle.
Verify Fitment (Recommended)
Before ordering, confirm:
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OEM part number 4149 129 0901
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Your STIHL model is listed below
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Your engine serial number matches the range shown
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Part location matches your parts diagram
⚠️ Always verify fitment by OEM part number and serial number for best accuracy.
Compatibility (Fits STIHL Models)
(Serial number range applies)
Hedge Trimmers / Long-Reach Units
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HL 91 K (Engine from serial number 516095589)
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HL 94 KC-E (Engine up to serial number 514368761)
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HL 94 K (Engine up to serial number 514368761)
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HL 94 (Engine up to serial number 514368761)
Trimmers / Brushcutters
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FS 94 R (Engine up to serial number 514309587)
Kombi Tools
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KM 94 R (Engine up to serial number 514291126)
Installation Notes
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Turn off engine and allow it to cool
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Access the gasket location based on your model diagram
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Remove the old gasket carefully
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Clean sealing surfaces before installing the new gasket
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Install STIHL OEM gasket 4149 129 0901
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Reassemble and confirm proper sealing
⚠️ Dirty or damaged sealing surfaces may cause leaks even with a new gasket.
Maintenance Tips
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Inspect gaskets anytime the engine is disassembled
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Replace gaskets that are crushed, hardened, or damaged
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Use genuine STIHL OEM gaskets for correct fit and sealing performance
