Description
Overview:
This Genuine Stihl muffler (MPN: 1140 140 0656) is the original exhaust assembly for Stihl MS311 and MS391 petrol chainsaws. Built from tough pressed steel with a heat-resistant black coating, it is designed to reduce exhaust noise and route hot gases safely away from the user and the machine. The internal flow path maintains the correct back pressure for reliable running, helping the saw start and pull cleanly under load. As an OEM part, it matches the original fit and finish, aligning perfectly with the cylinder and front cover. Use it to replace a damaged, corroded, or excessively noisy exhaust and to restore the chainsaw's intended performance and sound levels with the durability expected from a Genuine Stihl component.
Key Features:
- Genuine Stihl part for MS311 and MS391, ensuring precise fit and reliable operation
- Pressed steel body with heat-resistant black coating for durability in demanding conditions
- Tuned outlet path helps reduce noise and maintain correct engine back pressure
- Directs hot exhaust away from the operator and saw bodywork for safer use
- Factory-correct mounting points for straightforward installation with existing hardware
- Robust construction resists impact, vibration, and heat cycling in daily use
- Helps restore normal power delivery and throttle response on worn or damaged systems
- Suitable for professional forestry, arborist, and agricultural workloads, as well as domestic users
Typical Applications:
Direct replacement when the original muffler is cracked, dented, rusted, excessively loud, or blocked with carbon. Ideal during a top-end refresh, after impact damage, or as preventative maintenance to keep noise levels and exhaust flow within the saw's design. Helps maintain consistent cutting performance when felling, cross-cutting, logging, firewood processing, and general estate or farm work.
Also known as:
Silencer, exhaust muffler, exhaust box, exhaust housing, exhaust can, noise damper, exhaust assembly, outlet box. Often referred to as a chainsaw silencer for reducing sound and controlling gas flow. Used to describe the OEM exhaust unit on compatible Stihl mid-range petrol chainsaws.
Fits Models:
MS311, MS391
Alternate Part Numbers:
1140-140-0604, 1140 140 0604, 1140-140-0656, 11401400604, 11401400656
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