What Is the Jonsered 2071 Chainsaw? (CC & HP Specs)
The Jonsered 2071 is a large-displacement, two-stroke gasoline chainsaw commonly listed at 70.7 cc and 3.5 kW, or about 4.8 hp. It is intended for demanding cutting, not light pruning. Exact bar, chain, fuel mix, and tuning details depend on the saw’s version, so check its model plate and matching operator’s manual before use.
What the Jonsered 2071 is
The Jonsered 2071 is a powerful, professional-class chainsaw made for substantial cutting work. Its engine size and output help identify its general class, but they do not tell you which bar and chain fit your particular saw. For those details, the machine’s identification and manual matter.
Terms such as “cc” and “hp” can make a model sound easier to identify than it is. In practice, the 2071’s specifications give you a useful starting point, while the model plate and manual guide setup and safe operation.
The chainsaw uses a two-stroke gasoline engine. That means it needs the fuel mixture specified for the saw, rather than straight gasoline. Never guess the oil ratio or use straight gas; confirm the correct mixture in the manual that matches your model.
A chainsaw’s safety systems also matter as much as its engine rating. Do not assume that a particular safety feature or setup is present just because the model name is familiar. Inspect the actual saw and consult its instructions before operating it.
Jonsered 2071 engine size and horsepower
Displacement is the volume swept by an engine’s piston as it moves through the cylinder. Power describes how quickly the engine can do work. For the 2071, commonly published figures are 70.7 cc and 3.5 kW, often shown as about 4.8 hp; published ratings may vary by market or revision.
| Specification | Commonly published figure | What it tells you |
|---|---|---|
| Engine displacement | 70.7 cc | The engine’s size class |
| Rated output | 3.5 kW | The stated power output |
| Horsepower | About 4.8 hp | A rounded power figure |
| Engine type | Two-stroke gasoline | Requires the specified fuel mixture |
Kilowatts and horsepower are two ways to express power. Converting 3.5 kW gives about 4.7 mechanical horsepower, while some published listings round or use a different horsepower convention and show about 4.8 hp. Treat these as approximate equivalents, not two separate ratings.
The model plate and the manual for the exact saw should take priority over a general listing. If the numbers differ, check that the manual matches the model and revision, and ask a qualified service provider if the identification is unclear.
A 70.7 cc saw is intended for demanding work such as bucking and felling by a trained operator. It is not a natural choice for casual pruning. Engine size alone, however, does not make a cut safe or determine the right bar length.
Bar and chain fit: check the exact configuration
A bar is the long guide that supports the chain; chain pitch, gauge, and drive-link count are dimensions used to identify a matching chain. The 2071’s model name alone does not confirm these details. Read the bar stamp and chain markings, then make sure the chain also matches the sprocket.
| Item to verify | Where to check | Why it matters |
|---|---|---|
| Bar length and fit | Bar markings and the applicable manual | Confirms an approved setup |
| Chain pitch | Bar and chain markings; sprocket specification | Pitch must match across the parts |
| Chain gauge | Bar and chain markings | The chain must fit the bar groove |
| Drive-link count | Existing chain and bar setup | The chain must be the correct length |
| Fuel mixture | Matching operator’s manual | Prevents guessing the engine’s fuel needs |
| Carburetor and RPM limits | Matching service or operator information | Avoids unverified tuning figures |
Do not choose a bar because its length seems right or because another 2071 has one. Use only a bar and chain combination approved for your exact saw. As a general selection principle, use the shortest approved bar that safely reaches the cut; the model’s manual and work conditions determine what is suitable.
Hardwood does not change the chain’s required pitch, gauge, or length. It does call for a sharp, correctly filed chain and controlled feed. Do not force a dull chain through wood: stop, secure the saw, and correct the chain condition.
Configuration examples, not fitment claims
These examples show how to think through setup; they do not specify a Jonsered 2071 bar length or chain. For any real saw, confirm every dimension against its markings and the matching manual.
- If you are replacing a worn chain, record its markings and check that the bar and sprocket match before buying a replacement.
- If you are changing the bar, verify that the new bar is approved for the saw and that its chain fits both the bar and sprocket.
- If the markings are missing or unreadable, do not guess. Have a qualified dealer or service provider identify the parts.
Prepare and operate the 2071 safely
Preparation means checking the saw, the work area, and your protective gear before starting. These steps help reduce avoidable risks, but they do not replace hands-on chainsaw training. Tree felling and other high-risk cuts require appropriate skill, equipment, and a controlled work zone.
Before starting, wear a chainsaw-rated helmet, eye and hearing protection, leg protection, gloves, and suitable boots. Inspect the chain brake, throttle lockout, chain catcher, chain tension, bar, and fasteners. If a safety part is damaged or does not work as intended, do not use the saw until it has been repaired.
- Prepare the work area. Keep bystanders clear and plan a retreat path. Check for utilities, overhead hazards, wind, tree lean, defects, and nearby targets. Do not fell a tree without suitable training, equipment, and a controlled work zone.
- Start according to the manual. Use its cold- or warm-start steps, keeping the saw stable and the chain clear of people and objects. Engage the chain brake when carrying the saw or when not cutting. Release it only when ready to cut.
- Cut with control. Use two hands and a stable stance. Keep cuts below shoulder height and avoid the guide-bar nose. Plan cuts for the wood’s condition and, when felling, preserve a correctly sized hinge. Use wedges or other suitable controls when needed.
- Stop before handling or cleaning. Stop the engine before adjusting the saw, clearing debris, or doing maintenance. Let it cool before refueling, and refuel in a safe, well-ventilated place away from ignition sources.
Rotational kickback is a sudden, forceful movement that can occur when the upper part of the bar nose contacts wood or another object. Keep that area clear and maintain a firm two-handed grip. A working chain brake is important, but it does not make nose contact safe.
Maintenance, lubrication, and storage
Routine care helps keep the saw’s cutting parts and safety systems in serviceable condition. Follow the manual for maintenance intervals and specifications. Do not rely on a generic chain setting, fuel ratio, or tuning figure when the exact manual provides the correct information.
Keep the chain sharp and matched to the bar. Set its depth gauges, sometimes called rakers, to the chain maker’s specification; do not assume a generic clearance is correct for your chain. Check tension often, especially with a cold chain after initial operation, and stop if the chain, bar, or sprocket is damaged or excessively worn.
Use the specified chain oil and confirm that oil reaches the chain using the manual’s test procedure. If you suspect poor oil delivery, stop and check the system as directed rather than continuing to cut. Carburetor settings and idle or maximum RPM must follow the exact manual and specified test method. Do not tune by ear or use an unverified online RPM number.
For seasonal storage, clean and inspect the saw, protect the bar and chain, and store it securely with the chain covered, away from children and ignition sources. Use fresh fuel and follow the manual’s fuel-system instructions for storage. Stale fuel can contribute to hard starting, poor running, or engine damage.
Frequently asked questions
These answers cover the main identification and setup questions for the Jonsered 2071. Because specifications and approved parts can depend on the saw’s market or revision, use them as a guide and confirm details with the model plate and matching manual.
How many cc is a Jonsered 2071?
It is commonly specified at 70.7 cc. Check the model plate and matching manual to confirm your saw’s exact version.
How much horsepower does a Jonsered 2071 have?
Common listings show 3.5 kW, often described as about 4.8 hp. The exact horsepower figure can depend on rounding or conversion convention.
Is the Jonsered 2071 a professional chainsaw?
It is a large-displacement saw intended for demanding cutting. Its size does not replace the training and precautions needed for felling or other high-risk work.
What bar length fits a Jonsered 2071?
The model name alone does not establish a suitable bar length. Check the saw’s manual and use only an approved bar-and-chain combination.
What chain fits the Jonsered 2071?
Match the chain’s pitch, gauge, and drive-link count to the bar and sprocket. Read their markings or have a qualified service provider identify them.
What fuel mix does a Jonsered 2071 use?
Use the two-stroke fuel mixture specified in the manual for your exact saw. Do not use straight gasoline or guess the oil ratio.
Can a Jonsered 2071 cut hardwood?
A suitable, sharp chain can cut hardwood, but work conditions and operator skill matter. Use controlled feed and do not force a dull chain.
Can I set the carburetor by ear?
No. Follow the exact manual and its specified RPM limits and test method. Do not rely on an unverified internet figure.
What should I check before starting it?
Check the chain brake, throttle lockout, chain catcher, chain tension, bar, fasteners, work area, and protective equipment. Do not operate a saw with a faulty safety part.
What is the safest next step if the saw’s setup is unclear?
Stop before cutting. Identify the saw from its model plate, find the matching manual, and confirm the bar, chain, fuel, and maintenance requirements there.
The key takeaway is that the Jonsered 2071 is commonly listed as a 70.7 cc, 3.5 kW chainsaw, but those headline figures are not a setup guide. Verify the exact saw and approved parts, follow its manual, and do not operate it if its safety condition or configuration is uncertain.
(This article was written by one of our staff writers, Evan Bradley. Visit our Meet the Team page.)
