Introduction
Thank you for choosing the ONEVAN 6-inch Mini Cordless Chainsaw. This manual provides essential information for the safe and efficient operation, maintenance, and troubleshooting of your new tool. Please read this manual thoroughly before first use and keep it for future reference.

Figure 1: The ONEVAN 6-inch Mini Cordless Chainsaw with its complete set of accessories, including batteries, charger, chains, and safety gear.
Safety Information
WARNING: Always wear appropriate personal protective equipment (PPE) when operating the chainsaw. This includes safety goggles and gloves.
- Ensure the safety lock is engaged when the chainsaw is not in use or during maintenance.
- Keep hands, hair, and loose clothing away from the chain when the tool is operating.
- Do not operate the chainsaw in wet conditions or near flammable liquids or gases.
- Always maintain a firm grip on the chainsaw with both hands, even though it is designed for one-hand use, for maximum control and safety.
- The rotatable protective baffle should always be in place during operation to minimize debris kickback.
Package Contents
Your ONEVAN Mini Cordless Chainsaw package includes:
- 1 x ONEVAN 6-inch Mini Chainsaw
- 2 x 21V Lithium-ion Batteries (2000mAh each)
- 2 x Chainsaw Chains (one pre-installed)
- 1 x US Charger
- 1 x Goggles
- 1 x Pair of Gloves
- 1 x Screwdriver
- 1 x User Manual (this document)
Setup
1. Battery Charging
Before first use, fully charge both 21V Lithium-ion batteries. The digital power display on the battery indicates the charge level. Charging typically takes approximately 90 minutes per battery.

Figure 2: The 21V Lithium-ion battery features a digital power display and multiple protection systems, including over-voltage, over-current, over-heat, over-charge, and short-circuit protection.
2. Chain Installation and Adjustment
The ONEVAN chainsaw features a tool-free chain tensioning and bar tightening system. Follow these steps to install or adjust the chain:
- Remove the sprocket cover.
- Assemble the saw chain along the guide bar, ensuring the chain direction is correct.
- Place the chain around the sprocket and ensure the guide bar lines up with the pin.
- Adjust the tension of the chain using the knob. The chain should be snug but still able to move freely.
- Twist the knob to fix the bar securely.
- Insert a charged battery pack into the slot at the bottom of the chainsaw handle.

Figure 3: The chainsaw's design allows for easy, tool-free chain tensioning and bar tightening, simplifying setup and maintenance.
3. Automatic Oiling System
The chainsaw is equipped with an automatic oiling system for continuous chain lubrication. Simply pour ordinary engine oil into the oil tank. The system will automatically lubricate the chain as needed during operation.

Figure 4: The automatic oiling system ensures the chain remains lubricated during use, enhancing performance and chain longevity. The oil tank is easily accessible for refilling.
Operating Instructions
1. Starting and Stopping
To start the chainsaw, press and hold the safety lock button located on the handle, then press the trigger. The chain will begin to move. To stop, simply release the trigger. The safety lock prevents accidental starting.
2. Cutting Techniques
The ONEVAN Mini Chainsaw is designed for high efficiency, capable of cutting a 6-inch diameter log in approximately 4 seconds (actual time may vary based on wood type and hardness). Its 26.5 ft/s chain speed ensures quick and clean cuts.

Figure 5: The chainsaw's powerful motor and sharp chain allow for efficient cutting of various wood types, making tasks quicker and requiring less effort.
3. One-Handed Operation
Weighing only 2.9 lbs, this chainsaw is lightweight and designed for comfortable one-handed use, providing excellent maneuverability for various tasks.

Figure 6: The compact and lightweight design of the chainsaw enables comfortable and controlled one-handed operation, ideal for reaching difficult angles or extended use.
4. Applications
The ONEVAN Mini Cordless Chainsaw is versatile and suitable for a wide range of applications, including:
- Tree Pruning
- Wood Cutting
- Home Improvement Projects
- Cutting Bamboo

Figure 7: The chainsaw's adaptability makes it an ideal tool for diverse tasks, from garden maintenance to small construction projects.
Maintenance
1. Chain Lubrication
Regularly check the oil level in the tank and refill with ordinary engine oil as needed. The automatic oiling system will ensure the chain is properly lubricated during operation, which is crucial for performance and chain lifespan.
2. Chain Tension
Periodically check the chain tension. A properly tensioned chain should be snug against the guide bar but still allow for manual movement. Adjust using the tool-free knob as described in the Setup section.
3. Cleaning
After each use, clean the chainsaw to remove sawdust, debris, and resin. Ensure the battery is removed before cleaning. Use a soft cloth and mild detergent if necessary. Keep the ventilation slots clear to prevent overheating.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Chainsaw does not start | Battery not charged; Safety lock not disengaged; Battery not properly inserted. | Charge battery; Press safety lock button before trigger; Re-insert battery firmly. |
| Chain not moving smoothly | Chain tension too tight/loose; Lack of lubrication; Chain dull. | Adjust chain tension; Refill oil tank; Replace chain. |
| Reduced cutting efficiency | Dull chain; Insufficient lubrication; Overload protection activated. | Replace chain; Refill oil tank; Reduce cutting pressure, allow motor to cool. |
| Battery drains quickly | Heavy load; Battery age; Extreme temperatures. | Reduce cutting load; Consider battery replacement; Operate in moderate temperatures. |
Specifications
| Feature | Detail |
|---|---|
| Brand | ONEVAN |
| Model Number | 004137 |
| Power Source | Battery Powered |
| Voltage | 21 Volts |
| Battery Capacity | 2 x 2000mAh Lithium Ion |
| Chain Length | 6 Inches |
| Chain Speed | 26.5 ft/s |
| Item Weight | 2.9 Pounds |
| Product Dimensions | 13"L x 5.5"W x 7"H |
| Motor Type | Pure Copper W775 Motor |
| Oiling System | Automatic |
Warranty and Support
ONEVAN offers a 1-year guarantee for this product. Should you encounter any issues or require assistance, please do not hesitate to contact us. There is no need to return the product for warranty claims; simply reach out to our support team for prompt resolution.
For support, please refer to the contact information provided at the point of purchase or on the product packaging.
