What Is a Stihl 070 Contra Chainsaw (Vintage Specs)
The STIHL 070 Contra is a large, vintage professional chainsaw, commonly listed with a 106 cm³ engine, about 4.8 kW (6.5 hp) of output, and a powerhead mass near 11.5 kg (25.4 lb). Its exact specifications and safe setup depend on its version and fitted parts, so check its identification plate and matching manual before use.
Have you found “070 Contra” on an old saw, in a manual, or in a video and wondered what it means? The name identifies a powerful older STIHL chainsaw, but it does not tell you the exact bar, chain, fuel mix, or adjustment settings on a particular machine.
I treat those details as model-specific, not as assumptions to make from the number alone. That matters because a vintage saw may have been repaired or fitted with parts that differ from its original setup.
What Is a STIHL 070 Contra?
The STIHL 070 Contra is a large-displacement, gasoline-powered chainsaw from STIHL’s older professional equipment range. “Contra” is part of the model name, not a cutting feature. The saw was built for demanding work by trained operators, and its size and weight make it very different from a typical homeowner saw.
The model is often described as a vintage or classic chainsaw. Exact production dates, equipment, and specifications can vary by market and version. An old saw’s current condition also matters: age alone cannot show whether it is safe or mechanically sound.
The key point is that an 070 Contra is not simply a modern chainsaw with an unusual name. It is older equipment whose fuel, cutting attachment, and adjustment requirements must be confirmed for the individual saw.
STIHL 070 Contra Vintage Specifications
Vintage specifications are useful for identifying the model, but they are not a substitute for the saw’s manual. Commonly published figures include a 106 cm³ engine, roughly 4.8 kW of rated output, and a powerhead mass near 11.5 kg. Published figures can vary, so verify the version and what the listed weight includes.
| Specification | Commonly listed figure | What to check |
|---|---|---|
| Engine displacement | 106 cm³ | Confirm the model and version |
| Rated output | About 4.8 kW (6.5 hp) | Published figures may vary by market or version |
| Powerhead mass | About 11.5 kg (25.4 lb) | Generally excludes bar and chain |
| Fuel mixture | 25:1 gasoline to oil by volume in vintage 070 documentation | Follow the manual for that exact saw and oil |
| Bar and chain | No universal fit can be assumed | Check saw version, drive, sprocket, mount, and oiling system |
Powerhead mass means the weight of the engine and saw body, generally without the guide bar and chain. The complete saw weighs more once those parts and fuel are added. That weight affects handling and fatigue, particularly during long or awkward cuts.
Rated output is the engine power figure listed in a specification. It does not prove that an old saw still produces that power. Wear, repairs, fuel, and tuning can all affect how it runs.
Fuel mix and cutting attachment
For the 070, vintage documentation commonly specifies a 25:1 gasoline-to-oil mix by volume. Do not assume that a modern 50:1 mix is suitable. Use the instructions for the exact saw and oil; if the manual is missing or unclear, ask a qualified chainsaw technician before running it. Straight gasoline or an unverified leaner mix can cause severe engine damage, including piston and cylinder seizure.
Do not guess bar length, chain pitch, chain gauge, or engine speed from “070 Contra” alone. These depend on the saw’s version and installed parts. Check the sprocket, bar stamp, chain markings, and version-specific manual. Bar length alone does not show that a combination is approved.
Equipment Setup and Safety Preparation
Before starting, confirm that the saw, cutting attachment, fuel, and controls are in safe working order. A vintage machine may have missing, worn, or changed parts. If a safety part is damaged or a critical specification cannot be confirmed, do not use the saw until a qualified technician has checked it.
Start with the identification plate and manual. Compare the model and version with the manual, then confirm that the installed bar and chain match the specified drive, sprocket, bar mount, and oiling system. A bar that physically fits is not automatically a safe or approved match.
Before use, inspect the:
- Chain brake, throttle trigger and interlock, and stop control
- Chain catcher, handles, bar, chain, and visible fasteners
- Chain condition and tension, following the manual
- Fuel mix and bar-oil supply
Wear a helmet with eye and face protection, hearing protection, chainsaw-rated leg protection, gloves, and boots. Check footing, overhead hazards, bystanders, and escape routes. For felling, assess the tree and work area before cutting; do not proceed without the skill to plan the work safely.
Start the saw on stable ground using the correct cold- or warm-start procedure. Keep the chain clear of people and objects. At idle, the chain should not move. If it does, stop the saw and have the idle setting checked before work.
Field Cutting and Landscaping Operation
The 070 Contra is intended for demanding cutting by trained operators, not routine homeowner landscaping. Its large engine and heavy powerhead call for steady control, suitable protective equipment, and a task that matches both the saw and the operator’s training. Do not treat it as a general-purpose yard tool.
Use two hands and maintain a stable stance. Keep the guide-bar nose clear of wood unless the task and your training require otherwise. Contact with the upper part of the bar nose can cause rotational kickback, which can throw the saw back toward the operator. A chain brake is important, but it does not replace sound technique.
Keep the saw below shoulder height and use the correct method for the cut and the way the wood is loaded. Do not force a dull chain through wood or use a mismatched bar and chain. Either condition can increase the risk of kickback, chain derailment, or mechanical failure.
Felling requires more than a powerful saw. Before cutting, a competent operator must assess tree lean, defects, wind, nearby targets, escape routes, and the planned hinge. If you cannot assess those factors or control the work zone, do not fell the tree.
The following are practical inspection scenarios, not reports of specific historical repairs:
| Scenario | What to check | Safer next step |
|---|---|---|
| An inherited 070 has no manual | Identification plate, version, fuel instructions, and safety parts | Ask a qualified technician to identify the setup before starting |
| A replacement bar is offered as a match | Bar mount, sprocket, chain markings, and oiling system | Confirm the complete combination in the matching manual |
| The chain moves at idle | Idle behavior and condition of the controls | Stop the saw and have it checked; do not cut until resolved |
For any unfamiliar condition, stop rather than experimenting. A short inspection is safer than trying to compensate for an unknown setup while cutting.
Maintenance, Sharpening, and Tuning
Maintenance keeps the 070’s cutting parts and engine in working order, but its settings should come from the correct manual. Use the specified chain sharpening and depth-gauge, or raker, settings. Have fuel-mixture and maximum-speed settings checked with a tachometer by a qualified technician rather than tuning by sound or guesswork.
After stopping the engine, clean the air filter as directed, the bar groove and oil hole, the sprocket area, and cooling surfaces. Inspect the chain, bar, and fasteners for wear or damage. Follow the manual for lubrication, tension checks, and service intervals.
A raker, also called a depth gauge, controls how deeply each cutter can bite into wood. Its correct height depends on the chain specification. Do not file it to a generic measurement: an incorrect setting can make cutting unsafe or poor.
Sharpen the chain using its marked specification and the appropriate procedure. If the chain is damaged, the bar is worn, or the chain fit is uncertain, replace or service the part only after confirming compatibility. Do not run a mismatched cutting attachment to “see if it works.”
Storage and Seasonal Care
Store the saw and fuel as directed in the manual for that version. Before cleaning, servicing, or putting the saw away, stop the engine and let it cool. Keep the saw in a secure place, away from children and ignition sources, and do not leave fuel in a way the manual does not permit.
Before seasonal storage, clean the saw and inspect the bar, chain, and visible fasteners. Check the air filter and cooling surfaces, and note any damage or parts that need service. Use the manual’s instructions for fuel handling and storage; vintage saws may need care that depends on their fuel system and the products used.
When bringing it back into service, repeat the pre-use inspection. Confirm the fuel mixture, bar-oil supply, chain tension, controls, and approved cutting attachment rather than relying on how the saw was last set up.
Conclusion: What to Confirm Before Using an 070 Contra
The STIHL 070 Contra is a heavy, high-powered vintage chainsaw, commonly listed at 106 cm³ and about 4.8 kW. Those figures identify its general class, but they do not settle the safe setup of an individual saw. Confirm its version, fuel instructions, and cutting attachment before starting it.
If you cannot verify the manual, bar-and-chain fit, or engine settings, get help from a qualified chainsaw technician. Do not run the saw with straight gasoline, an unverified fuel mix, damaged safety parts, or a mismatched cutting attachment.
FAQs About the STIHL 070 Contra
These answers address common identification and setup questions. Because the 070 Contra is a vintage model, use the manual for the exact version whenever a detail affects fuel, parts, or adjustment.
How big is the STIHL 070 Contra engine?
The engine displacement is commonly listed as 106 cm³. Check the saw’s identification and version because specifications can vary across markets or versions.
How much power does a STIHL 070 Contra make?
Common listings give about 4.8 kW, or 6.5 hp. This is a published figure, not a measure of the output of a particular old or worn saw.
How heavy is the 070 Contra?
Its powerhead mass is commonly listed near 11.5 kg (25.4 lb), generally without the bar and chain. The complete saw weighs more.
What fuel mix does a vintage 070 Contra use?
Vintage 070 documentation commonly specifies 25:1 gasoline to oil by volume. Confirm the correct mix in the manual for the exact saw and oil; do not assume 50:1 is allowed.
What bar length fits a STIHL 070 Contra?
There is no safe universal answer based on the model name alone. Confirm the saw version, bar mount, sprocket, chain, and oiling system against its manual.
What chain pitch and gauge does it use?
Do not assume a single pitch or gauge applies to every 070 Contra. Read the chain and bar markings, inspect the sprocket, and confirm the full match in the version-specific manual.
Is the 070 Contra suitable for a beginner?
It is a large, heavy professional saw intended for demanding work by trained operators. A beginner should not treat it as a routine landscaping saw or use it without appropriate instruction and a verified setup.
Can I use a chain brake instead of avoiding kickback?
No. Keep the bar nose clear and use sound cutting technique. A chain brake is a safety feature, not a substitute for training or control.
What should I do if the chain moves at idle?
Stop the saw and do not cut with it until the cause is checked. Have the idle setting and controls inspected by a qualified technician.
Should I tune the maximum engine speed by ear?
No. Use the exact manual’s setting and have maximum speed checked with a tachometer by a qualified technician.
(This article was written by one of our staff writers, Evan Bradley. Visit our Meet the Team page.)
