Stihl MS 270 C Chainsaw (Overview Guide)
The STIHL MS 270 C is a 50 cm³ gasoline chainsaw intended for property work and firewood cutting, but its age and setup matter as much as its engine size. Before buying, confirm the saw’s condition, exact bar-and-chain fit, and parts support. A sound, correctly equipped example may suit regular cutting; it is not a substitute for professional felling equipment or training.
Could this saw handle your regular work without turning a careful purchase into an expensive repair? The answer depends on the specific MS 270 C in front of you. Model versions and cutting setups can differ, and a used saw’s condition can outweigh its original specifications. I assess the powerhead, safety parts, and cutting set before judging whether the price makes sense.
What the STIHL MS 270 C is
The MS 270 C is a gasoline-powered chainsaw with an engine displacement of about 50 cm³. Displacement describes the engine’s swept volume; it offers a rough size comparison, but does not by itself predict cutting speed or condition. The “C” label may refer to features that vary by model and market, so check the saw’s identification and manual.
This is a practical class of saw for property maintenance, cutting firewood, and some tree-care tasks by trained operators. Its suitability depends on wood size and condition, the chain’s sharpness, and the operator’s skill. A longer bar does not make a saw suitable for every tree or felling job.
STIHL’s published specifications for the MS 270 family, and the manual for the exact version, are the right places to confirm technical details. In general, the powerhead is around 5 kg before adding the bar, chain, and fuel. Treat that as a class reference, not a complete ready-to-cut weight.
When I assess one, I first look for the model identification and the manual that matches it. Then I check whether the safety devices work, whether the saw runs and oils the chain correctly, and whether its parts are available locally. That sequence helps separate a fair buy from an attractive price hiding costly problems.
Bar, chain, and workload fit
The bar is the metal guide that supports the chain. A compatible bar-and-chain set must match the saw’s mount, sprocket, pitch, gauge, and drive-link count. Pitch is the chain’s size; gauge is the thickness of its drive links. Those details are stamped on parts or listed in the manual, and should be verified before buying replacements.
Common MS 270 C setups use bars in the 16–20-inch range, but that does not mean every bar fits every version. A shorter bar is often easier to control and puts less cutting load on the saw. Choose the shortest approved bar that safely reaches the intended cut, not the longest one that can be mounted.
| Intended work | Practical starting point | What to check |
|---|---|---|
| Firewood and small property cleanup | A compatible 16- or 18-inch setup may be suitable | Wood size, chain condition, and operator experience |
| Larger logs within the saw’s approved range | An 18- or 20-inch setup may be considered | Exact bar approval, chain match, and cut conditions |
| Large, leaning, storm-damaged, or complex trees | Do not choose by bar length alone | Use qualified help when risk or skill demands it |
This table is a selection guide, not a guarantee that a given bar suits a particular tree. Trunk diameter, lean, tension in the wood, footing, and escape routes all affect risk. For tree felling, storm damage, or work near power lines, use qualified personnel and follow applicable clearance rules.
Before ordering a chain, read the guide-bar stamp and identify the drive sprocket. Then match pitch, gauge, and drive-link count. Do not assume one chain specification fits every MS 270 C. A chain that appears close can still be wrong, unsafe, or damaging.
Setup and safe operation
Safe setup means more than fitting a bar. It includes the correct fuel, working safety parts, chain lubrication, protective equipment, and a clear work area. Follow the manual for the exact saw. For professional tree work, also follow applicable ANSI Z133 and OSHA requirements; local rules may add further duties.
Use fresh gasoline mixed at 50:1 with oil approved for air-cooled two-stroke engines. That equals 20 mL of two-stroke oil per 1 L of gasoline. Do not use four-stroke engine oil. Use dedicated bar-and-chain oil in the oil tank; the saw has an oil pump, but oil delivery should not be judged by an assumed fixed flow rate.
Before starting, inspect the chain brake, throttle lockout, chain catcher, controls, bar, chain, and chain tension. Check that the chain is sharp, undamaged, and lubricated. Wear a helmet, eye and hearing protection, chainsaw-protective legwear, gloves, and suitable boots. Clear your footing, plan an escape route, and keep bystanders outside the work zone.
Start on stable ground using the manual’s cold- or warm-start method, with the chain clear of people and objects. Engage the brake for starting and while moving the saw; release it only when ready to cut. Hold the saw with both hands, keep stable footing, and avoid cutting with the bar nose.
Kickback is a rapid upward and backward movement of the bar. It can happen when the upper tip area contacts wood or another object. Keep the bar nose clear, use a firm two-handed grip, and maintain a working chain brake. Never force a dull chain through wood or cut above shoulder height.
After cutting, engage the brake and stop the engine. Let the saw cool before refueling or servicing it. Clean debris from the sprocket cover, bar groove, and oil passages, then check chain tension and look for damage. These checks can reveal problems before the next use.
Setup examples and buying checks
These examples are practical inspection scenarios, not reports of specific customer jobs. They show how I would assess the saw against a buyer’s workload. A particular saw may need a different setup, and the correct manual and approved parts remain the final guide.
Example: occasional firewood cutting. A buyer expects to cut manageable logs on stable ground. I would first confirm that a shorter approved bar and matching chain are fitted, then check cold starting, idle behavior, chain-brake action, chain lubrication, and visible wear. If those checks pass, the saw may be worth further consideration, subject to price and service needs.
Example: cleanup after a storm. A buyer wants to cut fallen limbs and logs under tension. The saw’s engine size does not make that work safe. Bent or loaded limbs can shift as they are cut, and unstable footing adds risk. I would not recommend learning these cuts on a used saw; a trained operator may be needed.
Example: a saw with an unknown chain. The seller says the chain is “standard,” but the bar stamp and drive sprocket have not been checked. I would pause the purchase until pitch, gauge, and drive-link count are confirmed. A low asking price does not offset a mismatched or unsafe cutting set.
When inspecting a used example, ask for the manual and service history if available. Check for damaged safety parts, loose handles, fuel leaks, a worn sprocket, and signs of poor repairs. Have a qualified technician assess uncertain engine, brake, or tuning problems. The cost of a repair should be included in your purchase decision.
Maintenance, sharpening, and storage
Routine care helps the saw run as designed and makes faults easier to spot. Follow the exact manual for service intervals and parts. The chain type determines the correct file diameter and sharpening angles; one sharpening method does not fit every chain.
Sharpen cutters evenly and keep depth gauges at the chain maker’s specified height. Depth gauges control how much wood each cutter removes. For some common 3/8-inch chain, the nominal setting is 0.65 mm (0.025 inch), but confirm the chain’s own specification rather than applying that number to every setup. Replace damaged or excessively worn chains, bars, sprockets, or safety parts.
Clean or service the air filter, inspect the spark plug, and keep the cooling system clear as the manual directs. Typical manual figures for some versions are about 2,800 rpm at idle and 13,000 rpm maximum engine speed. These are not universal tuning targets; confirm the exact manual. Carburetor work and maximum-speed checks need the right procedure and a tachometer. Refer suspected lean running or tuning problems to a qualified technician.
For long-term storage, follow the manual’s fuel-system instructions. Old fuel can cause hard starting and poor running, and fuel deterioration can damage engine parts. Keep fuel in an approved container, away from ignition sources. Clean and dry the saw, protect the bar and chain, and store it securely out of children’s reach. Follow the manual’s guidance on the chain brake during storage.
Is the MS 270 C the right buy?
The MS 270 C can make sense if the saw is in sound condition, your work fits its capacity, and its bar-and-chain setup is approved and properly matched. It is less attractive if the seller cannot confirm its identity, safety features are faulty, or parts and repairs make the price poor value. Compare the complete cost, not only the asking price.
| Buyer situation | Recommendation |
|---|---|
| Regular firewood cutting, with a verified saw and suitable setup | Consider it after a careful inspection |
| Light, infrequent trimming | Compare with a smaller saw that meets the job |
| Complex felling, storm-damaged trees, or power-line work | Use a qualified professional |
| Unknown chain fit or failed safety parts | Do not use until corrected and checked |
The deciding question is not whether the model has enough displacement on paper. It is whether this exact saw, in its present condition, has the approved cutting setup and safety equipment for your work. If you cannot verify those points, pause the purchase or arrange a professional inspection.
Frequently asked questions
How big is the STIHL MS 270 C engine?
It is a gasoline chainsaw in the roughly 50 cm³ class. Confirm the exact model and specifications from its identification and matching manual.
What bar length fits an MS 270 C?
Common setups are 16–20 inches, but approved lengths vary. Confirm the specific saw, bar mount, and manual before fitting a bar.
Can I use any chain listed for a 16-inch bar?
No. The chain must match the bar and sprocket in pitch, gauge, and drive-link count.
What fuel mix does the MS 270 C use?
Use fresh 50:1 gasoline and approved air-cooled two-stroke oil, or 20 mL oil per 1 L gasoline. Follow the exact manual.
Does the saw need bar-and-chain oil?
Yes. Use dedicated bar-and-chain oil in its oil tank, and check that the chain receives lubrication.
Is the MS 270 C suitable for felling trees?
Bar length and engine size alone cannot establish that. Tree condition, lean, site, and operator skill matter. Complex or hazardous felling requires qualified personnel.
What should I check on a used MS 270 C?
Verify model identity, safety devices, bar and chain fit, chain lubrication, leaks, wear, starting, and service history. Have uncertain faults checked by a qualified technician.
Can I adjust the carburetor by ear?
No. Tuning and maximum-speed checks require the correct procedure and a tachometer. Use a qualified service technician if the saw runs poorly or may be running lean.
How should I store the saw for a season?
Follow the manual’s fuel-system steps. Clean and dry the saw, protect the bar and chain, and store it securely away from ignition sources and children.
(This article was written by one of our staff writers, Marcus Thorne. Visit our Meet the Team page.)
