Husqvarna 266 XP Chainsaw (Field Test & Specs)
The Husqvarna 266 XP is a 66.7 cc professional saw built for demanding ground-level cutting, but its age and changing parts make condition and setup as important as the model name. I assess its published specifications and practical use limits here; this is not a new instrumented test. Confirm the serial-specific manual, installed bar and chain, and safety parts before buying or cutting.
A big displacement number can make an older saw look like an easy upgrade. It does not tell you whether the particular saw for sale starts reliably, has a healthy engine, or carries a bar and chain that match its sprocket. Those details decide whether a 266 XP is a sound buy or an expensive repair project.
My assessment separates known model specifications from checks that require examining the individual saw. I do not claim measured cutting speed, vibration, or fuel use for a unit I have not tested. For a used 266 XP, those measurements cannot be inferred from its badge.
What the 266 XP is, and who it suits
The Husqvarna 266 XP is a professional two-stroke chainsaw with 66.7 cm³ of engine displacement. Displacement is the volume swept by the piston, not a direct measure of cutting speed. The saw is intended for demanding work in trained hands, not as a light, low-effort homeowner saw.
Its size makes it a candidate for ground-level bucking and felling, provided the saw is sound and the operator is trained. Dense hardwood, dull cutters, and a bar that is too long all raise the load. A larger engine does not make it safe to force a cut or use poor technique.
I would consider it if you need a substantial saw and can inspect, maintain, and repair an older machine. If you want a dependable daily tool with known service history and current parts support, compare its total condition and repair cost with a newer saw before deciding.
Published specifications and what they mean
Specifications describe a model configuration, not necessarily the saw in a seller’s photographs. A used 266 XP may have a replacement bar, chain, sprocket, or other parts. I treat the manual for the saw’s serial range and the parts actually fitted as the final authority.
| Item | Commonly reported specification or setup | What to verify |
|---|---|---|
| Engine displacement | 66.7 cm³ | Confirm model identity and serial-specific manual |
| Fuel mix | 50:1 with Husqvarna-approved two-stroke oil | Follow the manual if it specifies another ratio |
| Idle speed | About 2,500 rpm | Verify by the applicable manual and service procedure |
| Maximum no-load speed | About 12,500 rpm | Check with a tachometer; do not tune by ear |
| Chain setup | Commonly 3/8-in pitch, .058-in gauge | Check the bar, chain, drive sprocket, and drive-link count |
| Bar length | Varies by setup and intended work | Confirm compatibility and choose for the cut |
Pitch is the spacing used to describe chain size; gauge is the thickness of the drive links that sit in the bar groove. Both must match the bar and sprocket. A chain can appear to fit and still be wrong. Never assume a saw retains its original setup.
A stated maximum speed is not a target for casual adjustment. Carburetor tuning should follow the correct service procedure with a tachometer. If the saw’s history or installed parts are unclear, have a qualified technician check it before hard use.
Bar length and cutting performance
Bar length is the usable cutting length of the guide bar. A longer bar can reach across larger wood, but it also adds reach and leverage, and it may increase the load on the engine. The best choice is the shortest compatible bar that safely completes the work.
The 66.7 cc engine can run longer bars in suitable configurations, but displacement alone does not settle the choice. Tree diameter, wood condition, access, and your ability to control the saw matter. Dense or dry hardwood places more load on the chain than easier-cutting wood. Keep the chain sharp instead of trying to overcome poor cutting with engine power.
| Work you expect to do | Bar-selection approach | Main caution |
|---|---|---|
| Smaller-diameter bucking | Choose the shortest compatible bar that reaches through the cut | Keep the bar nose clear of the wood |
| Larger ground-level logs | Use a compatible bar long enough for the planned cut | Plan the cut to avoid pinching and binding |
| Mixed sizes or tight access | Favor control and manageable reach over maximum length | Do not force a bar into an awkward position |
| Felling a tree | Match bar and technique to tree size, lean, and site | Get qualified help if the fall is uncertain |
This is a selection guide, not a claim that a specific bar length suits every 266 XP. Check the installed bar’s pitch and gauge, the chain’s drive-link count, and sprocket compatibility. If those details cannot be confirmed, pause the purchase or have a dealer identify the parts.
Field-use assessment: setup, bucking, and felling
A field assessment asks whether the saw’s setup supports the planned work and whether it can be operated safely. I cannot verify cutting time or vibration for an unseen, untested unit. Before work, inspect the saw, confirm its fuel and chain setup, and plan each cut rather than judging performance by engine size alone.
Start with a cold, stopped saw. Inspect the chain brake, throttle lockout, stop switch, chain catcher, handles, anti-vibration mounts, bar rails and nose, sprocket, fasteners, and chain tension. Check that the oil passages are clear and that the saw delivers chain oil. Repair damaged safety parts before operation.
Mix fresh fuel in an approved container using the ratio stated for that saw and oil. With Husqvarna-approved two-stroke oil, 50:1 is a commonly cited ratio; use the manual’s instruction if it differs. Never use straight gasoline. Fill the fuel and chain-oil tanks separately, and use tackified bar-and-chain oil. During a brief, safe check, look for oil fling from the bar. Do not run the chain dry.
Start on firm ground with the chain brake engaged and follow the saw’s cold- or warm-start steps. Do not drop-start. Hold the saw with both hands and release the brake only when ready to cut. Wear a helmet, eye and hearing protection, chainsaw-protective legwear, gloves, and suitable boots.
For bucking, secure your footing and plan the order of cuts. Compression is the side of the wood that closes as it bends; tension is the side that pulls apart. Identify both before cutting to reduce the chance of a pinched bar. Stop if the chain dulls, loosens, or the saw acts abnormally. Do not push a dull chain through wood.
For felling, assess lean, wind, deadwood, hang-ups, nearby people, and overhead hazards. Plan a notch and back cut that leave a sound hinge suited to the tree and conditions, then retreat along a clear escape route. If size, defects, or surroundings make the fall uncertain, use a qualified tree professional with suitable rigging. Follow ANSI Z133 and applicable OSHA rules; OSHA 1910.266 applies to covered logging operations.
Buying a used 266 XP: checks that matter
A used saw’s condition is not established by a clean cover or a seller’s description. Ask for the serial number, service history, and details of any engine or bar changes. Then inspect the actual machine, ideally with a qualified technician. If the seller will not allow a basic inspection or safe start, treat that uncertainty as part of the price.
I would check for hard starting, unstable idle, a chain that moves at idle, poor oil delivery, damaged controls, fuel leaks, and excessive wear around the bar, sprocket, or clutch cover. These are inspection prompts, not a remote diagnosis. A saw that starts does not automatically have a healthy engine.
| Check | What to look for | Buying implication |
|---|---|---|
| Safety controls | Working brake, lockout, stop switch, catcher, and sound handles | Do not use until defects are repaired |
| Bar and chain match | Correct pitch, gauge, drive links, and sprocket fit | Mismatched parts need correction before cutting |
| Engine behavior | Reliable start and stable idle; no unusual behavior | Have faults assessed before assigning value |
| Oil delivery | Clear passages and evidence of lubrication | Stop if the chain is not receiving oil |
| Maintenance state | Clean cooling fins, filter, clutch area, and fasteners | Neglect can hide more costly work |
Also ask whether the saw has been tuned or rebuilt and who did the work. Carburetor settings should be checked using the serial-specific service process and a tachometer. Do not lean the high-speed mixture to chase power; too-lean operation can overheat the engine and cause piston seizure. Refer unresolved tuning or ignition faults to a qualified service shop.
The practical buying question is not only, “What does a 266 XP cost?” It is, “What will this exact saw cost to make safe and reliable?” Add the price of any needed bar, chain, sprocket, safety repair, or engine service before comparing it with another saw.
Sharpening, maintenance, and storage
Routine care helps preserve performance and reveals wear before it becomes a larger problem. Clean the air filter, cooling fins, clutch cover, and oil passages as needed. Inspect the chain, bar groove and rails, sprocket, and fasteners. Follow the bar maker’s instructions for rotating or dressing the bar.
Use the chain maker’s file size, sharpening angle, and depth-gauge setting. Depth gauges control how much wood each cutter takes; they need the correct setting for the chain, not a guess. A .025-in (0.65 mm) setting is common on standard full-size chains, but it is not universal. Replace chains with cracked, damaged, or excessively worn cutters.
Adjust chain tension with the engine stopped and the chain cool. For extended storage, follow the manual’s fuel-system procedure. Store fuel in a sealed, approved container away from ignition sources. Clean and dry the saw, protect the bar and chain, and store it away from unauthorized users. Release the chain brake for storage when appropriate to avoid straining the brake band.
Kickback and safe operating limits
Rotational kickback happens when the upper quadrant of the bar nose contacts wood and throws the saw back toward the operator. It can happen quickly. Keep the nose clear, use a firm two-handed grip, and never cut above shoulder height. A chain brake can reduce injury risk, but it cannot make unsafe technique safe.
Do not operate the 266 XP with straight gasoline, incorrect or stale fuel, a loose or damaged chain, or mismatched bar parts. Do not force a dull chain through a cut. Stop, shut down, and correct the fault. When the saw behaves abnormally, do not treat continued operation as a test.
Conclusion: is the 266 XP the right choice?
The 266 XP’s 66.7 cm³ displacement points to a capable professional saw, but the individual saw’s condition and setup decide its value. I would favor it for demanding ground-level work only when its safety systems work, the engine is sound, and the bar and chain are confirmed compatible.
Before buying, verify the serial-specific manual, fuel ratio, installed parts, and service needs. For a longer bar, choose by the cut and your control, not by engine size alone. If you cannot inspect the saw or confirm its history, budget for a professional assessment before relying on it.
Frequently asked questions
How much displacement does a Husqvarna 266 XP have?
The Husqvarna 266 XP has a commonly listed engine displacement of 66.7 cm³. Check the saw’s identity and serial-specific documentation when buying a used unit.
What fuel mix does the 266 XP use?
A commonly specified mix is 50:1 gasoline to oil by volume when using Husqvarna-approved two-stroke oil. Follow the manual for the exact saw if it states a different ratio. Never use straight gasoline.
What chain fits a Husqvarna 266 XP?
Many 266 XP setups use a 3/8-in pitch chain with .058-in gauge. Bar and chain setups can vary. Match pitch, gauge, and drive-link count to the installed bar and sprocket before use.
What bar length should I use?
Use the shortest compatible bar that safely completes the cut. Consider wood diameter, access, and control. Confirm compatibility on the saw’s actual setup rather than assuming a factory bar is still installed.
What are its idle and maximum engine speeds?
Commonly cited figures are about 2,500 rpm at idle and 12,500 rpm maximum no-load speed. Verify these against the applicable manual. High-speed carburetor tuning requires a tachometer and the correct service procedure.
Can I use the 266 XP for felling?
It can suit demanding felling work in trained hands, with a sound saw and an appropriate setup. Assess lean, defects, deadwood, wind, and nearby hazards. Use a qualified tree professional if the fall is uncertain.
How should I check chain sharpness and depth gauges?
Sharpen to the chain maker’s file size, angle, and depth-gauge specification. A .025-in (0.65 mm) depth-gauge setting is common for some standard chains, but it is not universal. Replace damaged or excessively worn chain.
What is the main safety risk at the bar nose?
Contact between the upper quadrant of the bar nose and wood can cause rotational kickback toward the operator. Avoid nose contact, hold the saw with both hands, and never cut above shoulder height.
Is a used 266 XP a good buy?
It depends on the individual saw’s condition, parts, and repair needs. Check safety controls, engine behavior, oil delivery, bar-and-chain fit, and service history. Include inspection and repair costs when comparing prices.
(This article was written by one of our staff writers, Marcus Thorne. Visit our Meet the Team page.)
