Stihl 08 vs. 08S Chainsaws (Field Test)

The 08 and 08S are closely related older STIHL saws, but the 08S is commonly listed with slightly more displacement. That does not prove it will cut faster: condition, setup, bar and chain choice matter more than the badge alone. Identify the exact saw, use its manual, and verify every cutting component before putting either model to work.

Keeping a sound older saw in service can be a practical alternative to replacing it, but age changes the decision. A worn or altered 08 may be a worse choice than a well-kept 08S, and an unverified fuel mix or mismatched chain can turn a repairable machine into a safety risk. I would treat this as a comparison of two particular powerheads, not a simple contest between model names.

One note on “field test”: published specifications can guide the comparison, but they are not a controlled test of the saws in front of you. I won’t claim measured cutting times or performance results without verified test data. The checks below help you make a sound, model-correct comparison in the field.

What separates the 08 from the 08S?

The STIHL 08 and 08S are older saws with similar names and related designs. Common references place the 08 around 54 cm³ and the 08S around 56–57 cm³, but those figures are not a substitute for the type plate and matching manual. Treat them as identification clues, not a guarantee of a specific saw’s configuration.

Displacement is the volume swept by the piston. A small difference in displacement does not, by itself, tell you how much usable power remains after decades of wear. Compression, carburetor condition, exhaust condition, fuel delivery, chain sharpness and the wood being cut all affect performance.

If you are choosing between two used examples, compare their actual condition and completeness. A clean type plate, sound controls, known maintenance history and compatible cutting gear are more useful than a seller’s “pro” label. A model badge cannot confirm that the saw still has its original carburetor, sprocket or bar.

Identify the saw and verify its setup

Identification means confirming the model and configuration from the saw itself, then matching them to reliable documentation. A serial number may help a dealer or STIHL support identify a machine, but number formats and records vary. Do not rely on an online chart alone to prove its age, country of origin or originality.

Start with the type plate or other model markings and record the full model designation and serial number. Look for signs that the plate is missing, altered or inconsistent with the saw. Then consult the manual for that exact version, or ask a STIHL dealer to help identify it. A serial number by itself is not a complete specification sheet.

Inspect the fitted bar, chain and drive sprocket as a set. Bar length alone cannot establish chain fit. Check the bar stamp for pitch and gauge, count the chain’s drive links, and confirm that the sprocket and bar oiling holes match the setup. If a component has been changed and its compatibility cannot be confirmed, pause and get the correct part information before running the saw.

Watch for suspicious listings that promise a model identity without clear photographs, a readable plate or a chance to inspect the machine. A serial number is one check, not a guarantee against a counterfeit or a rebuilt saw described inaccurately. Compare markings and components with dealer guidance, and avoid buying if key details cannot be verified.

Equipment Setup and Safety Preparation

This section covers the checks to make before starting either saw. Because these are older, relatively heavy machines, the right decision is not simply whether the engine runs. Confirm safe controls, sound cutting gear, a working oil supply and a suitable site before deciding the saw is ready for ground-level work.

Inspect the throttle return and lockout, stop switch, hand guard, chain catcher, caps and fuel lines. Check the chain tension, cutters, depth gauges, bar rails, oil holes and sprocket for wear or damage. A loose or mismatched bar, chain and sprocket can cause poor tracking or derailment. If the chain is loose, damaged or binding, do not start cutting.

Wear chainsaw-rated protective equipment and keep bystanders clear. Assess the wood, its lean, overhead hazards, wind and stored tension before choosing a cut. Keep an escape route in mind when the work calls for one. For professional operations, confirm that the saw and work practice meet applicable OSHA 1910.266 and ANSI Z133 requirements; take a noncompliant saw out of production.

Start on firm ground with the chain brake engaged, following the correct manual. Once running, check that the chain does not move at idle and that oil reaches the chain. Stop if oil delivery is not visible, the controls fail to work, or the saw behaves unexpectedly. Do not use a long bar just because the engine has roughly 54–57 cm³ of displacement; bar choice changes both load and kickback exposure.

Field Cutting and Landscaping Operation

For a fair comparison, use the same kind of wood and a safe, repeatable cut, but only after both saws pass inspection. Keep the setup within the exact manual’s limits. This approach shows how each individual saw behaves without pretending that a brief cut proves a model is faster or better in every task.

Use a sharp, correctly matched chain and maintain two-handed control with a stable stance. Keep the bar nose clear of the wood: contact at the tip can cause kickback. Do not force a dull chain through a cut. Stop and reassess if the bar binds, the saw stops cutting freely, or the wood moves in a way you did not expect.

For a useful side-by-side check, note how easily each saw starts, whether it idles without driving the chain, whether lubrication is present and whether it cuts steadily with a sharp chain. Record the bar and chain configuration, fuel used and condition of the wood. If the setups differ, note that too; otherwise you may credit the model name for a difference caused by the equipment.

These are not modern lightweight limbing saws. Keep use within your training and the manual’s intended limits. Felling or bucking wood under tension calls for appropriate training and a site-specific plan, not a quick comparison cut. Stop the test if you lose control, the chain loosens, oil delivery fails or either saw shows a mechanical fault.

Maintenance, Sharpening, and Carburetor Tuning

Maintenance can change the result of any comparison. A sharp chain, clean air intake and sound fuel system help a saw work as intended, while poor tuning or worn parts can make a healthy model seem weak. Use the exact service information for the saw; modern STIHL settings are not automatically correct for a legacy 08 or 08S.

Fuel mix is a critical example. Period manuals may call for a richer mix than current STIHL guidance, so there is no safe universal ratio to apply to every example. Use fresh, correctly mixed two-stroke fuel and the oil grade specified in the exact manual. Do not use straight gasoline or assume 50:1 is suitable unless the manual or STIHL service guidance approves it.

Sharpen the chain according to its maker’s instructions. The depth gauge, often called a raker, controls how deeply a cutter bites; its correct setting depends on the chain. Do not use a generic clearance value on an unidentified or modified chain. If the chain type is unclear, identify it before sharpening or replacing it.

Carburetor settings, operating speed and bar-oil flow can vary with the version and its condition. Follow the correct service manual, and use a tachometer where the procedure specifies one. Do not tune by ear or borrow a modern saw’s RPM target. After service, confirm stable idle, safe throttle return and visible oil delivery before cutting.

Storage and Seasonal Care

Storage helps preserve a usable saw, but it does not repair worn or unsafe parts. After work, stop the engine, let it cool and engage the chain brake before handling the chain. Clean the intake area, bar groove, oil holes and sprocket cover, then inspect for leaks or damage before putting the saw away.

Follow the manual’s directions for fuel and storage rather than assuming every older machine should be treated the same way. Keep fuel and the saw stored separately as directed, and keep the machine away from ignition sources. Before the next use, repeat the inspection and confirm chain tension, oil delivery and control function.

Which one should you choose?

Choose by verified condition and fit for your work, not by the small difference in commonly listed displacement. If both saws are sound and correctly set up, the 08S may have a modest displacement advantage on paper. That alone does not establish a field-performance win or justify paying more for a worn example.

For a homeowner, either model may be a poor fit if its weight, age or maintenance needs exceed your experience. For occasional ground-level cutting, prioritize a well-documented saw that is easy to inspect and service. For professional work, require a compliant machine, trained operator and suitable dealer support. If the setup or identity is uncertain, the safest choice is to walk away or have a qualified STIHL dealer inspect it.

Frequently asked questions

These quick answers cover the common questions that come up when identifying and comparing the two models. Confirm any specification that affects safe use with the correct manual or a qualified STIHL dealer, because variants and later changes can alter the details.

Is the 08S more powerful than the 08?
It is commonly listed with slightly more displacement, but that does not prove greater usable power in a particular saw. Condition, tuning and cutting setup matter.

What is the displacement of an 08?
Common references place it around 54 cm³. Verify the exact version from its type plate and manual.

What is the displacement of an 08S?
Common references place it around 56–57 cm³. Check the exact model documentation before relying on that figure.

Can an 08S use the same bar as an 08?
Not automatically. Confirm that the bar, chain, sprocket and oiling holes are compatible with that specific powerhead.

What fuel mix should I use?
Use the ratio and oil grade in the exact saw’s manual or STIHL service guidance. Do not guess or apply 50:1 without approval.

Can I identify the saw’s year from its serial number?
Not reliably from a generic online chart alone. Ask a STIHL dealer or support service to interpret the number and confirm the model.

Does a longer bar make either saw better?
No. A longer bar adds load and exposure to kickback. Use only an approved combination and do not choose length from displacement alone.

How can I check that the chain is being oiled?
Follow the manual’s check procedure and confirm visible oil delivery before cutting. Stop if lubrication is absent or uncertain.

Should I buy an 08 or an 08S for professional work?
Only if the exact saw is serviceable, correctly equipped and compliant with applicable work requirements. Have a dealer inspect uncertain machines.

What should I do if the chain loosens or binds?
Stop the engine and reassess. Do not continue until the chain, bar and sprocket are checked, correctly matched and tensioned to the manual.

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