Stihl 025 vs. MS 250 Chainsaw (Comparison)

The STIHL 025 and MS 250 are closely related 45.4 cm³ saws, with similar power and common 16–18-inch bar setups. The MS 250 is the later model, but age and condition matter more than the name when buying used. Before choosing either, check the exact saw’s parts, chain fit, safety features, and service history.

A chainsaw that looks like a bargain can still need costly repairs, and a bar that appears to fit may not match the chain or sprocket. Both models can do useful homeowner work, but neither is a substitute for a larger professional saw or a trained tree worker. Wear chainsaw-rated protection, follow the manual, and do not cut beyond your skill level.

STIHL 025 vs. MS 250: What Changed?

The 025 is the older model, and the MS 250 followed it in STIHL’s lineup. Both are air-cooled, single-cylinder, two-stroke saws near 45.4 cm³. Published power is about 2.3 kW, or roughly 3.1 hp, though ratings can differ by market and version.

The key point for a buyer is that these saws are close in basic size and intended workload. The newer name does not mean every MS 250 has the same bar, chain, or parts as every 025. Production changes and regional versions matter, especially when you are buying a used saw or ordering replacement parts.

I compare these models by condition and fit, not by model badge alone. A clean, well-maintained 025 may be a better purchase than a worn MS 250. Conversely, a newer saw with sound compression, working safety parts, and a clear service history may be worth paying more for.

Takeaway: Their core capacity is similar. Focus your comparison on the specific saw in front of you.

Which Saw Fits Your Workload and Budget?

These are homeowner and light-duty saws for tasks such as cutting firewood and bucking manageable limbs on the ground. “Bucking” means cutting a felled trunk or limb into shorter pieces. A 16–18-inch bar is common, but usable bar length depends on the exact saw setup and the wood you plan to cut.

For routine firewood work, either model can make sense if it is in good repair and fitted with the right chain. A longer bar can reach farther into a cut, but it also adds leverage and demands more from the saw and operator. Do not choose a bar by length alone. Match the bar, chain, and drive sprocket as a set.

Before paying, inspect a used saw in person if possible. Check that it starts and idles, that the chain stays still at idle, and that the chain brake works. Look for fuel or oil leaks, damaged handles, worn bar rails, a loose or damaged sprocket, and signs of poor repair. A seller’s claim that the saw “just needs a tune” is not proof that it is a minor fix.

I would not treat a low purchase price as a saving until the saw has passed a basic inspection. A damaged brake, uncertain fuel-system condition, or hard-to-source model-specific part can change the total cost. Confirm parts availability with a STIHL dealer or parts supplier using the exact model and serial details.

Takeaway: For modest firewood and yard work, condition and safe operation should decide the purchase before a small difference in model year.

Bar, Chain, and Parts Compatibility

Compatibility means that the bar, chain, and sprocket all share the same specifications. The model name alone does not tell you the correct chain loop. Before ordering, check the bar mount, chain pitch, chain gauge, and drive-link count on the saw and bar, then confirm them against STIHL fitment information.

Common setups include .325-inch pitch with .063-inch (1.6 mm) gauge. Some MS 250 versions use 3/8-inch Picco pitch with .050-inch (1.3 mm) gauge. These combinations are not interchangeable by appearance. The bar groove must fit the chain drive links, and the chain pitch must match the sprocket.

A common chain depth-gauge setting for many .325-inch chains is about 0.025 inch (0.65 mm), but use the chain maker’s filing chart for the exact chain. Depth gauges control how much wood a cutter takes in each pass. Setting them too low can make the chain cut aggressively and raise the risk of kickback.

Takeaway: Read the markings and verify the fitment data. Do not order a chain from displacement or model name alone.

Equipment Setup and Safety Preparation

A safe setup starts with the exact model manual and a full check of the saw’s controls. Inspect the chain brake, throttle interlock, chain catcher, handles, chain tension, bar rails, and oiling system before cutting. Wear a helmet, eye and hearing protection, chainsaw-rated leg protection, gloves, and boots.

Check the fuel and oil specified for the saw. STIHL specifies a 50:1 gasoline-to-two-stroke-oil mix when using its approved two-stroke oil, or an oil that meets the applicable STIHL specification. Older fuel-system parts may not be ethanol-compatible, so do not assume that a fuel blend is suitable for an older 025 or MS 250. Use STIHL bar-and-chain oil for chain lubrication.

To start, follow the model manual’s cold- or warm-start steps. Engage the chain brake and place the saw on stable ground, with the bar and chain clear. Never drop-start the saw. Once it is running, confirm the chain does not move at idle and check that the chain receives oil before cutting.

Takeaway: If a safety feature fails, the chain moves at idle, or lubrication is uncertain, stop and have the saw checked before use.

Field Cutting and Landscaping Operation

A properly set-up 025 or MS 250 is intended for controlled cutting within the saw’s limits. Use a sharp, correctly tensioned chain and secure the wood so it cannot roll or shift. Plan each cut around the wood’s support and the pressure within it; wood can pinch the bar as it moves.

Rotational kickback happens when the upper part of the bar nose hits wood or another object, causing the bar to rise toward the operator. Keep the nose clear, hold the saw with both hands, and avoid cutting with the tip. A working chain brake is important, but it does not replace safe technique.

For tree work, follow ANSI Z133 and applicable OSHA requirements. Do not attempt felling near people, buildings, or utilities without qualified planning. Leave hung-up trees, overhead hazards, and work beyond your training to a qualified arborist. Never cut above shoulder height or force a dull chain through wood.

Takeaway: Both models can handle suitable ground-level work, but safe technique and sound planning set the real limits.

Maintenance, Sharpening, and Tuning

Regular maintenance helps reveal problems before they become failures. After use, engage the chain brake, shut off the saw, and let it cool. Clean the air filter and sprocket cover, clear the bar groove and oil hole, and inspect the chain and bar. Retension only when it is safe to handle the saw.

Use the chain maker’s filing guide and depth-gauge setting. A dull chain can make cutting slow and tiring; do not push harder to compensate. Check the manual for the correct engine-speed limits. Typical service figures are about 2,800 rpm at idle and 12,000 rpm at maximum no-load speed, but exact figures vary. A technician should use a tachometer to tune the saw. Do not tune by ear or exceed the manual’s limit.

Oil flow and adjustment vary by production version, so there is no single reliable flow-rate figure for every 025 or MS 250. If the chain seems dry, inspect the oil supply, bar oil hole, and manual instructions rather than assuming the pump has one universal setting.

Takeaway: Manual-specific service data beats a generic tuning figure, especially on an older saw.

Fitment Cases and Buying Decisions

The examples below are fitment scenarios, not tests of individual saws. They show how to apply the same checks to either model before buying a replacement bar or chain.

• An 025 offered with an 18-inch bar: Read the bar markings and confirm the mount, pitch, gauge, and drive-link count. Then check that the bar is approved for that exact saw version. Do not assume the bar is correct because it is already attached.
• An MS 250 with a replacement chain: Check whether the saw uses .325-inch or 3/8-inch Picco pitch. Confirm the sprocket and bar match that pitch, then verify the chain gauge and link count. A chain that looks close is not a confirmed fit.
• A used saw with unknown service history: Ask for the manual or exact model details, test the safety controls, and have a qualified shop assess the saw if its condition is unclear. Price alone cannot establish engine health or parts availability.

For a $300–$700 purchase decision, compare the complete cost: saw price, any needed bar or chain, and likely service work. I would choose the cleaner, verified setup over a lower-priced saw with uncertain fitment or non-working safety parts.

Takeaway: Confirm the whole configuration before buying parts, and assess used-saw condition before comparing prices.

Storage and Seasonal Care

Proper storage reduces avoidable wear, but the manual should guide fuel handling for the exact saw. After cutting, clean the saw, inspect the bar and chain, and store it in a dry place away from children. Follow the manual for transport and refueling, and do not store the saw where fuel vapors may reach a flame or spark.

Takeaway: Clean the saw and follow its manual before putting it away for a long period.

Conclusion and FAQ

The 025 and MS 250 share similar displacement and power, so there is no universal winner based on the name alone. The MS 250 is the later model, but a sound 025 can still suit light-duty work. For either one, verify condition, safety features, and exact bar-and-chain compatibility before spending money.

Which is more powerful, the STIHL 025 or MS 250?
They are close in published output, around 2.3 kW (about 3.1 hp), with ratings varying by version and market. Check the manual for the exact saw.

Is the MS 250 a replacement for the 025?
The MS 250 followed the 025 in STIHL’s lineup. They share a similar size and intended use, but parts and setup should be checked by exact version.

Can I use the same bar on both saws?
Not automatically. Confirm the bar mount and the saw’s chain pitch, gauge, and sprocket setup before fitting it.

What bar length is common on these models?
Bars around 16–18 inches are common, but the approved length depends on the exact saw version and setup. Check the manual or STIHL fitment data.

Do both saws use .325-inch chain?
Not always. Some MS 250 versions use 3/8-inch Picco, and configurations can vary. Check the bar and sprocket markings before buying a loop.

What fuel mix should I use?
STIHL specifies 50:1 gasoline-to-two-stroke oil with its approved oil or an oil meeting the applicable STIHL specification. Follow the manual for your saw.

Is an older 025 worth buying used?
It can be, if it is in sound condition, its safety features work, and parts are available. Have an uncertain saw checked before purchase.

What should I inspect first on a used saw?
Check the chain brake, throttle interlock, catcher, handles, idle behavior, chain tension, bar rails, oiling, leaks, and signs of poor repair.

Can I tune the saw by ear?
No. Follow the exact manual and use a tachometer for engine-speed checks. A qualified technician should handle tuning if you lack the tools or experience.

When should I hire an arborist?
Hire a qualified arborist for felling near structures or utilities, hung-up trees, overhead hazards, or any work beyond your training.

(This article was written by one of our staff writers, Marcus Thorne. Visit our Meet the Team page.)