The Stihl MS311 and MS391 are powerful 20-inch chainsaws built for demanding cutting tasks, from firewood processing to property maintenance and storm cleanup. Choosing the right replacement chainsaw chain ensures optimal cutting performance, safety, and durability for these mid-range saws.
In this guide, we explain the correct chain specifications for the MS311 and MS391 and recommend a reliable chain option that fits these models and performs well in real-world cutting conditions.
Correct Chain Specifications for Stihl MS311 / MS391 (20")
To ensure proper fit and safe operation, the replacement chain must match these key specifications:
- Pitch: 3/8"
- Gauge: .050"
- Drive Links: 72DL (for most 20" setups)
- Guide Bar Length: 20"
These values are typically stamped on the guide bar or listed in the saw’s owner manual.
Why These Specifications Matter
Pitch determines how the chain engages the sprocket, gauge ensures the drive links sit correctly in the guide bar groove, and the drive link count controls chain length. Combining all three correctly ensures smooth, efficient cutting and safe operation.
Recommended Chain Option
A dependable chain engineered for these exact specifications is:
3/8" Pitch .050" Gauge 72DL 20" Chainsaw Chain
This chain is designed to fit Stihl MS311, MS391, and similar 20" chainsaws, offering reliable cutting performance with reinforced components and durability for frequent use.
Performance and Use Cases
- Efficient cutting of firewood and hardwood
- Strong performance in pruning and property maintenance
- Durable design for intensive or frequent cutting
Installation and Maintenance Tips
- Verify pitch, gauge, and drive link count before installation
- Maintain proper chain tension for best performance and safety
- Sharpen or replace the chain when cutting efficiency decreases
Conclusion
Selecting a correctly matched chainsaw chain for your Stihl MS311 or MS391 enhances cutting efficiency, reduces chain and saw wear, and improves safety and confidence in demanding tasks.