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- 4226 149 0605 STIHL Muffler Gasket – Genuine OEM Part
Description
4226 149 0605 STIHL Muffler Gasket – Genuine OEM Part
The STIHL Muffler Gasket (4226 149 0605) is a genuine OEM replacement gasket designed for use on select STIHL hedge trimmers. This gasket provides a critical seal between the muffler and the crankcase, preventing exhaust leaks and ensuring proper exhaust flow for reliable engine performance.
A properly sealed muffler-to-crankcase connection helps maintain correct exhaust back pressure, reduces noise, and protects engine components from hot exhaust gases. A worn or damaged gasket can result in power loss, increased noise, overheating, or exhaust leakage.
Manufactured to STIHL factory specifications, this OEM muffler gasket ensures correct fitment, dependable sealing, and long-lasting durability under professional operating conditions.
Product Details
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OEM Part Number: 4226 149 0605
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Brand: STIHL (Genuine OEM)
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Part Type: Muffler Gasket
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Application: Muffler-to-crankcase sealing
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Condition: New Genuine OEM Part
Function
This OEM muffler gasket is designed to:
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Seal the muffler-to-crankcase connection
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Prevent exhaust leaks and loss of back pressure
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Reduce exhaust noise and vibration
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Replace worn, burned, or damaged gaskets
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Maintain proper engine performance and efficiency
⚠️ A leaking muffler gasket may cause power loss, excessive noise, overheating, or exhaust gas damage to nearby components.
Verify Fitment (Recommended)
Before ordering, confirm:
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OEM part number 4226 149 0605
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Application matches your STIHL hedge trimmer model
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Fitment corresponds to your STIHL illustrated parts diagram
⚠️ Exhaust and crankcase components may vary by production version — always verify by OEM part number.
Compatibility
This OEM muffler gasket fits select STIHL hedge trimmer models, including:
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HS 80 (Crankcase)
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HS 85 (Crankcase)
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HS 75 (Crankcase)
(Exact application depends on configuration and production version — verify using OEM parts diagram.)
Installation Notes
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Allow engine to cool completely before service
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Remove muffler mounting fasteners
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Remove the old gasket and clean sealing surfaces
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Install the new OEM gasket in correct orientation
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Reinstall muffler and torque fasteners evenly to specification
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Check for exhaust leaks after installation
⚠️ Muffler components become extremely hot — professional installation is recommended if unsure.
Maintenance Tips
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Inspect muffler gaskets during routine maintenance
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Replace gasket whenever the muffler is removed
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Keep exhaust fasteners tight and secure
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Address exhaust leaks promptly to avoid engine damage
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Use only genuine STIHL OEM exhaust gaskets for proper sealing

