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Description
4180 140 0602 STIHL Muffler – Genuine OEM Part
The STIHL Muffler (4180 140 0602) is a genuine OEM replacement exhaust muffler designed for use on select STIHL professional trimmers, brushcutters, edgers, hedge trimmers, KombiMotor units, and multi-task machines.
This muffler is a critical engine component that helps reduce exhaust noise, direct exhaust flow safely away from the operator, and support proper engine backpressure for efficient performance.
Manufactured to STIHL factory specifications, this OEM muffler ensures correct fitment, durability, and reliable long-term operation under demanding professional conditions.
Replacing a damaged, clogged, or leaking muffler helps restore proper exhaust flow, reduce noise, and prevent performance loss or overheating.
Product Details
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OEM Part Number: 4180 140 0602
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Brand: STIHL (Genuine OEM)
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Part Type: Muffler
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Application: Engine exhaust muffler assembly (model-specific)
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Condition: New Genuine OEM Part
Function
This OEM muffler is designed to:
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Reduce engine exhaust noise
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Direct exhaust gases safely away from the engine and operator
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Maintain proper exhaust flow and backpressure
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Replace damaged, cracked, or clogged mufflers
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Support consistent engine performance
⚠️ A damaged muffler may cause excessive noise, power loss, overheating, or unsafe exhaust leakage.
Verify Fitment (Recommended)
Before ordering, confirm:
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OEM part number 4180 140 0602
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Muffler configuration matches your model
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Application matches your STIHL illustrated parts diagram
⚠️ Muffler designs vary by model and production year — always verify fitment by OEM part number.
Compatibility
Fits select STIHL models and configurations, including:
Trimmers / Brushcutters
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FS 90 / FS 90 R (4180)
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FS 91 / FS 91 R / FS 91.0
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FS 100 RX
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FS 110 / FS 110 R / FS 110 RX
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FS 111 / FS 111 R / FS 111 RX
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FS 130 / FS 130 R
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FS 131 / FS 131 R / FS 131.0 / FS 131.0 R
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FS 310 / FS 311
Edgers
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FC 90
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FC 91
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FC 95
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FC 96
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FC 100
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FC 110
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FC 111
KombiMotors
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KM 90 R
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KM 91 R
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KM 110 R
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KM 111 R
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KM 130 R
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KM 131 R
Hedge Trimmers / Pole Pruners
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HL 90 K
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HL 100 / HL 100 K
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HT 100
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HT 101
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HT 102
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HT 105
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HT 130
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HT 131
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HT 132
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HT 133
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HT 134
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HT 135
Other Units
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FB 131
(Exact application depends on model configuration — verify using OEM parts diagram.)
Installation Notes
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Allow engine to cool completely before service
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Remove muffler cover and mounting hardware as required
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Replace muffler 4180 140 0602 in correct position
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Install new gaskets if recommended
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Reassemble securely to factory torque specifications
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Inspect for exhaust leaks after installation
⚠️ Exhaust components can become extremely hot — service should be performed by a qualified technician.
Maintenance Tips
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Inspect muffler and exhaust area regularly for cracks or carbon buildup
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Replace damaged mufflers promptly to prevent engine damage
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Always use genuine STIHL OEM exhaust parts for correct fit and safe operation


