4237 140 0601 STIHL Muffler – Genuine OEM Exhaust Part The STIHL Muffler (4237 140 0601) is a genuine OEM exhaust component designed to restore proper engine exhaust flow, noise reduction, and safe operation on select STIHL professional hedge trimmers. This muffler directs exhaust gases away from the engine while maintaining correct backpressure for optimal performance. Over time, mufflers can become clogged with carbon buildup, cracked from heat stress, or damaged by impact during heavy-duty use. A failing muffler may cause excessive noise, power loss, overheating, or unsafe exhaust discharge. Replacing it with the correct OEM part restores factory-specified exhaust performance without replacing the entire engine assembly. Manufactured to STIHL factory specifications, this genuine muffler ensures correct fitment, durability, and long-term reliability under professional operating conditions. Product Details OEM Part Number: 4237 140 0601Brand: STIHL (Genuine OEM)Part Type: MufflerApplication: Engine exhaust systemCondition: New Genuine OEM Part Function This STIHL muffler is designed to: Direct exhaust gases safely away from the engine Reduce operating noise to factory specifications Maintain proper exhaust backpressure for performance Replace cracked, clogged, or damaged mufflers Support reliable engine operation and safe exhaust control ⚠️ A damaged muffler can cause power loss, overheating, or unsafe exhaust operation. Verify Fitment (Recommended) Before ordering, confirm: OEM part number 4237 140 0601 Your unit model matches those listed below Application matches your STIHL illustrated parts diagram ⚠️ Mufflers are model- and production-specific — always verify by OEM part number and exhaust configuration. Compatibility This OEM muffler fits select STIHL hedge trimmer models with specific crankcase and cylinder configurations, including: Hedge Trimmers HS 81 R (Crankcase, Cylinder)HS 81 T (Crankcase, Cylinder) HS 86 R (Crankcase, Cylinder)HS 86 T (Crankcase, Cylinder) HS 81 TC-E (Crankcase, Cylinder) (Exact fitment depends on production version — always verify using OEM parts diagram.) Installation Notes Allow engine and muffler to cool completely before service Remove muffler mounting fasteners carefully Inspect exhaust port and gasket condition Install new muffler with proper gasket alignment Tighten fasteners to STIHL torque specification Test engine for proper exhaust flow and noise level ⚠️ Muffler service should be performed carefully to prevent burns or improper exhaust sealing. Maintenance Tips Inspect muffler regularly for cracks or carbon buildup Clean spark arrestor screen if equipped Avoid operating unit with loose muffler fasteners Replace damaged exhaust components promptly Always use genuine STIHL OEM mufflers for correct fit and safe operation
