Stihl MS 271 Farm Boss - 50.2cc Gas Engine with 20in Guide Bar for Farm and Ranch - STI-MS271KIT20
The Stihl MS 271 Farm Boss with 20in Guide Bar is a high-performance chainsaw built specifically for demanding property maintenance. Its highly efficient engine gives you 20% longer run times between refueling stops while cutting exhaust emissions in half, making your work more productive and environmentally friendly. The innovative pre-separation air filtration system keeps your air filter cleaner up to five times longer, saving you time and maintenance hassles.
The MS271 combines power with user comfort in one compact, ergonomic design. The advanced anti-vibration system significantly reduces fatigue during those long cutting sessions, while features like toolless caps and side-access chain tensioner make maintenance quick and simple. Whether you're cutting firewood, felling small trees, or cleaning up after storms, this reliable workhorse delivers the performance you need for your farm or large property.
Features
- Fuel-Efficient Engine: Delivers 20% longer run times between refuelings while cutting exhaust emissions in half compared to previous models
- Pre-Separation Air Filtration System: Extends air filter life up to five times longer, reducing maintenance frequency
- Advanced Anti-Vibration System: Reduces operator fatigue while providing optimum control during extended use
- Toolless Fuel and Oil Caps: Simply lift the lever and twist to remove or tighten without special tools
- Bumper Spikes: Prevent pull-in and provide better control, making cutting easier and more precise
- Side-Access Chain Tensioner: Allows for convenient chain adjustments with minimal effort
Specifications
| Intended Use |
Farm, Ranch, and Large Property |
| Power Source |
Gas |
| Powerhead Weight |
12.3 lbs |
| Guide Bar Length |
20 in |
| Chain |
.325" pitch, 0.050 gauge (23 RM3 81) |
| Engine Displacement |
50.2 cc |
| Engine Power |
3.49 bhp |
| Fuel Capacity |
16.9 oz |
| Chain Oil Capacity |
8.12 oz |
| Adjustable Blower Tube |
3-stage push-button adjustment |
| Metal Ring Protection |
Yes |
| Weather Resistance |
IPX4 splash-water rated |
What our Experts Think
Q&A
Maintenance Tips
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Clean after every use: Remove sawdust, oil, and debris from bar, chain, sprocket cover, and cooling fins to prevent overheating and wear.
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Chain care: Keep chain sharp and properly tensioned; check before each use for safe, efficient farm and ranch cutting performance.
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Guide bar maintenance: Clean oil groove and sprocket tip regularly; flip bar periodically for even wear and longer service life.
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Chain lubrication: Always check bar oil level and ensure automatic oiler is functioning correctly to protect bar and chain.
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Air filter service: Clean or replace regularly to maintain strong engine power, fuel efficiency, and easy starting.
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Fuel system care: Use fresh fuel mix only; avoid stale fuel and drain tank for long-term storage.
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Spark plug check: Inspect periodically for carbon buildup and replace if starting becomes difficult or engine runs unevenly.
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Fastener inspection: Tighten bar nuts, chain cover, and housing screws due to vibration during heavy-duty use.
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Cooling system: Keep engine intake and fins clear of dust and chips to prevent overheating.
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Storage: Fit bar cover, store in a dry place, and lightly oil chain and bar to prevent rust.
Damage 
Loss 
Theft 
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