20V MAX Lithium-Ion Cordless Chainsaw

Introduction

This manual provides essential information for the safe and effective operation, maintenance, and assembly of the Senix 20V MAX Lithium-Ion Cordless Chainsaw.

Safety & International Symbols

The following symbols are used throughout this manual to indicate potential hazards and important information:

• Caution / Warning: To reduce the risk of injury, user must read the instruction manual.
• Eye Protection: Wear eye protection.
• Hearing Protection: Wear hearing protection.
• Respiratory Protection: Wear respiratory protection.
• Protective Gloves: Wear protective gloves.
• No Rain: Do not expose to rain.
• DANGER: Keep hands away from blade.
• Electrical Hazard: Avoid power lines, use in dry conditions.
• Bystander Safety: Keep all bystanders at least 50 ft. away.

Thrown objects can ricochet and result in personal injury or property damage. Contact of the guide bar tip with any object should be avoided. Tip contact can cause the guide bar to move suddenly upward and backward, which can cause serious injury. Always use two hands when operating the chain saw. Do not dispose of battery packs in rivers or immerse in water. Do not dispose of battery packs in fire. They will explode and cause injury. Use and store the battery within a temperature below 122°F (50°C). Do not disassemble, crush, heat above 212°F (100°C); Never expose the battery to microwaves or high pressures.

General Power Tool Safety Warnings

WARNING! Read all safety warnings and all instructions. Failure to follow the warnings and instructions may result in electric shock, fire and/or serious injury. Save all warnings and instructions for future reference.

Work Area Safety

• Keep work area clean and well lit.
• Do not operate power tools in explosive atmospheres.
• Keep children and bystanders away.

Electrical Safety

• Match power tool plugs to outlets.
• Avoid body contact with earthed surfaces.
• Do not expose power tools to rain or wet conditions.
• Do not abuse the cord.
• Use extension cords suitable for outdoor use.
• Use a residual current device (RCD) in damp locations.

Personal Safety

• Stay alert, watch what you are doing and use common sense.
• Use personal protective equipment (eye protection, dust mask, safety shoes, hard hat, hearing protection).
• Prevent unintentional starting. Ensure the switch is off before connecting power or battery.
• Remove any adjusting key or wrench before turning the power tool on.
• Do not overreach; keep proper footing and balance.
• Dress properly; keep hair, clothing, and gloves away from moving parts.
• Ensure dust extraction and collection facilities are connected and used properly.

Power Tool Use and Care

• Do not force the power tool. Use the correct tool for the application.
• Do not use the power tool if the switch does not turn it on and off.
• Disconnect the plug/battery before making adjustments or changing accessories.
• Store idle power tools out of reach of children.
• Maintain power tools; check for misalignment or binding of parts.
• Keep cutting tools sharp and clean.
• Use the power tool and accessories in accordance with instructions and working conditions.

Battery Tool Use and Care

• Recharge only with the specified charger.
• Use power tools only with specifically designated battery packs.
• Keep battery away from metal objects when not in use to prevent shorting.
• Avoid contact with liquid ejected from the battery; flush with water if contact occurs.

Service

• Have power tools serviced by a qualified repair person using identical replacement parts.

Chainsaw Safety Warnings

• Keep all parts of the body away from the saw chain when operating.
• Always hold the chainsaw with your right hand on the rear handle and your left hand on the front handle.
• Hold the power tool by insulated gripping surfaces only.
• Wear safety glasses and hearing protection. Further protective equipment for head, hands, legs and feet is recommended.
• Do not operate a chainsaw in a tree.
• Always keep proper footing and operate the chainsaw only when standing on a fixed, secure and level surface.
• When cutting a limb that is under tension, be alert for spring back.
• Use extreme caution when cutting brush and saplings.
• Carry the chainsaw by the front handle with the chainsaw switched off and away from your body. Always fit the guide bar cover when transporting or storing.
• Follow instructions for lubricating, chain tensioning and changing accessories.
• Keep handles dry, clean, and free from oil and grease.
• Cut wood only. Do not use chainsaw for purposes not intended.

Causes and Operator Prevention of Kickback

Kickback may occur when the nose or tip of the guide bar touches an object, or when the wood closes in and pinches the saw chain in the cut. Tip contact can cause a sudden reverse reaction, kicking the guide bar up and back towards the operator. Pinching the saw chain along the top of the guide bar can push the guide bar rapidly back towards the operator. Either of these reactions may cause you to lose control of the saw, which could result in serious personal injury.

To avoid kickback:

• Maintain a firm grip with both hands.
• Do not overreach and do not cut above shoulder height.
• Only use replacement bars and chains specified by the manufacturer.
• Follow the manufacturer's sharpening and maintenance instructions for the saw chain.

Vibration and Noise Reduction

To reduce the impact of noise and vibration emission, limit the time of operation, use low-vibration and low-noise operating modes, and wear personal protective equipment. Keep hands warm and wear protective gloves. Seek medical advice immediately if symptoms of hand-arm vibration syndrome (HAVS) appear (tingling, numbness, loss of strength, fingers turning white).

Emergency

Familiarize yourself with the product. Memorize safety directions. Stay alert. Switch off the product and remove the battery pack if there are malfunctions. Have the product checked by a qualified professional.

Residual Risks

Potential risks remain even with proper operation, including health defects from vibration, injuries from broken attachments or hidden objects, and danger from flying objects. Prolonged use can cause 'whitefinger' disease. Wear gloves and keep hands warm. Seek medical advice for symptoms like numbness, tingling, or loss of strength.

WARNING! This product produces an electromagnetic field that may interfere with medical implants. Consult your doctor and the implant manufacturer before operating.

Know Your Unit

Applications

As a chainsaw: Limbing, felling, woodcutting, and remove buttress roots.

Components

Figure 1 shows the main components of the chainsaw:

• 1. Battery Pack
• 2. Unlock Button of Battery Pack
• 3. Rear Handle
• 4. Trigger Lock-out Switch
• 5. Guard with Chain Brake
• 6. Guide Bar
• 7. Saw Chain
• 8. Guide Bar Cover
• 9. Oil Tank Cap
• 10. Auxiliary Handle
• 11. Switch Trigger
• 12. Side Cover
• 13. Side Cover Nut
• 14. Tensioning Gear

NOTE: CSX2-M1-0 does not include the charger and the battery pack.

Specifications

Model: CSX2-M1

Battery Pack Model: B25X2 / B50X2

Charger Model: CHX2

Model: CSX2-M1-0

Assembly

Follow these steps for assembly:

1. Unpack all parts and lay them on a flat, stable surface.
2. Remove all packing materials and shipping devices.
3. Verify you have all parts: Chainsaw, Instruction manual, Guide bar, Guide bar cover, Saw chain, Wrench. (Note: CSX2-M1 includes charger and battery; CSX2-M1-0 does not).
4. If parts are missing or damaged, do not use the product and contact your dealer.
5. Ensure you have all necessary accessories and tools, including personal protective equipment.

WARNING: Wear protective gloves for assembly. Do not insert the battery pack before the power tool is completely assembled or adjusted.

Installing the Saw Chain and the Guide Bar

WARNING: Ensure the battery pack is removed before attaching the bar and chain.

1. Loosen the side cover nut counterclockwise with the wrench and remove the side cover (See Figure 2).
2. Loop the new saw chain into the slot of the guide bar according to the provided figure (See Figure 3).
3. Install the guide bar and saw chain onto the drive sprocket (See Figure 4). Adjust the tensioning gear if needed (See Figure 5).
4. Pull the chain around the guide bar to ensure it runs smoothly.
5. Replace the side cover and slightly tighten the side cover nut (See Figure 2). Do not overtighten.
6. Twist the tensioning gear until the saw chain can be lifted by 2-3 mm from the center of the guide bar.
7. Fully tighten the side cover nut clockwise (See Figure 2).

NOTE: After a short period of use, allow the chain to cool, remove the battery, and check the tension again.

Bar and Chain Oil Filling

WARNING: Bar and chain oil prevents premature wear. Never operate the chainsaw if oil is not visible. Check oil level frequently.

The chainsaw has an automatic oiler.

1. Place the chainsaw on its side with the oil tank cap on top.
2. Clean the cap area.
3. Remove the oil tank cap (See Figure 6).
4. Pour bar and chain oil into the tank.
5. Replace the cap and ensure oil is visible.

Installing/Removing the Battery Pack

• To install: Slide the battery pack into the battery docking port until it clicks (See Figure 7).
• To remove: Press the unlock button on the battery pack and slide it out.

Operation

WARNING: Never operate a damaged or improperly adjusted chainsaw. Ensure the saw chain stops moving when the trigger is released.

Testing the Chain Brake

The chain brake stops the motor and chain motion when kickback occurs. It can be activated by pushing the guard forward during kickback.

To check brake operation (See Figure 8):

• Place the saw on a firm, flat surface.
• Start the saw briefly.
• Push the guard forward to activate the chain brake. The motor and chain should stop immediately.
• If it does not stop immediately, have the chain brake checked at an approved service location.
• Release the switch trigger.
• Return to operating position.

Priming the Oiler

WARNING: Keep hands, clothing, and hair away from the drive sprocket when priming.

NOTE: Prime the oiler before first use or after long storage. Operating without oil will damage the chainsaw.

The chain is automatically lubricated.

1. Insert the battery.
2. Run the chainsaw for about two minutes.
3. Remove the battery.
4. Remove the side cover.
5. Check for oil on the bar.

Tensioning the Saw Chain

NOTE: Check chain tension before every start.

WARNING: Only tension the chain when it is cool.

1. Loosen the side cover nut slightly to unlock the guide bar and chain (See Figure 5).
2. Twist the tensioning gear until the saw chain can be lifted by 2-3 mm from the center of the guide bar.
3. Tighten the side cover nut after adjustment.

NOTE: If the chain is still loose at maximum tension, replace the chain.

Switching On/Off

WARNING: Hold the chainsaw firmly with both hands. Keep handles dry and clean.

• Ensure the guard is in the operating position.
• Press the trigger lock-out, then squeeze the switch trigger to start. Release the lock-out once started.
• To turn off, release the switch trigger (See Figure 10).

Overheat Protection

If the PCB temperature exceeds 248°F (120°C), the chainsaw will shut down automatically. Wait about five minutes for it to cool before restarting.

General Sawing Techniques

• Practice cutting logs on a saw-horse or cradle.
• Saw off lower branches first.
• Stay alert at the end of a cut as the saw's weight increases.
• Pull the saw out of a cut only while it is running to prevent jamming.
• DO NOT saw with the tip of the chain bar.
• DO NOT saw into branch formations.
• For smaller branches, place the saw's stop face on the branch and guide from top to bottom.
• For larger branches, make a relief cut from the bottom up (1/3 diameter), then cut from top to bottom (2/3 diameter). Saw longer branches in sections.

Felling a Tree

Ensure work areas are separated if multiple people are working. Trees should not be felled in a manner that endangers anyone or damages property. Notify the company if a tree contacts a utility line. Keep on the uphill side of the terrain. Plan and clear an escape path diagonally to the rear of the expected fall line (See Figure 11). Consider natural lean, branches, and wind direction.

Notching Undercut

Make the notch 1/3 the diameter of the tree, perpendicular to the direction of fall (See Figure 12). Make the lower horizontal cut first to avoid pinching.

Felling Back Cut

Make the felling back cut at least 2 inches (50 mm) higher than the horizontal notching cut, parallel to it (See Figure 12). Leave enough wood for a hinge to control the fall direction. Do not cut through the hinge. Use wedges if the tree may bind or fall incorrectly. After cutting, remove the saw, stop the motor, and retreat via the planned path.

Limbing a Tree

Limbing is removing branches from a fallen tree. Leave lower limbs to support the log. Remove small limbs in one cut (See Figure 13). Cut branches under tension from the bottom up.

Cross-Cutting/Bucking a Log

Ensure firm footing. Support the log with limbs, logs, or chocks if possible.

• Log supported along entire length (Figure 14): Cut from the top (overbuck).
• Log supported on one end (Figure 15): Cut 1/3 from the underside (underbuck), then cut 2/3 from the top (overbuck) to meet the first cut.
• Log supported on both ends (Figure 16): Cut 1/3 from the top (overbuck), then cut 2/3 from the bottom (underbuck) to meet the first cut.
• When cutting on a slope, stand on the uphill side (See Figure 17).
• Release cutting pressure near the end of the cut without relaxing grip. Do not let the chain contact the ground.
• Wait for the saw chain to stop before moving. Stop the motor before moving between trees.

Charging the Battery Pack

WARNING: Charge the battery pack fully before first use.

NOTE: Charge batteries between 32°F-104°F (0°C-40°C) and store between 32°F-77°F (0°C-25°C).

1. Connect the charger to a power supply (indicator light turns red).
2. Align the battery pack with the charger slot and insert it. The charger light turns green and flashes (See Figure 18).
3. The charger evaluates the battery condition.
4. The battery is fully charged when all four lights are on. Disconnect the charger and remove the battery.

Charging Indicator (See Figure 19)

• Lights On: Full capacity.
• Lights Off: 75% capacity.
• Lights Blinking: 50% capacity (requires charging); 25% capacity (requires charging soon); less than 5% capacity (requires immediate charging).

WARNING: Malfunctions may occur if all four lights blink simultaneously.

Overheat Protection

The tool stops automatically if overheated. Let it cool before restarting.

Overdischarge Protection

The tool stops automatically if battery capacity is insufficient. Remove and charge the battery.

Maintenance

WARNING: Failure to identify and replace damaged or worn parts can cause serious personal injury. Inspect the chainsaw regularly.

WARNING: Always remove the battery pack and let the product cool down before cleaning or maintenance. Wear gloves.

• Replacing/Changing Saw Chain and Guide Bar: Refer to "Installing the Saw Chain and the Guide Bar". Use only specified parts.
• Sharpening the Saw Chain: It is recommended to have the chain sharpened by an authorized service unless you are experienced.
• Cleaning:
  • Remove the battery.
  • Clean debris from the battery port and contacts with a soft, dry cloth.
  • Clean debris from the saw chain and guide bar after use.
  • Wipe the power head with a clean cloth moistened with a mild soap solution. Never use harsh cleaners or solvents.
  • Clean wood chips, sawdust, and dirt from the bar groove when replacing the chain.
  • Ensure the chain tensioning gear is free of debris.

  NOTE: Do not immerse the chainsaw powerhead in water or other liquids.

Transport

• Remove battery pack.
• Install guide bar cover.
• Drain bar and chain oil if desired.
• Carry saw with bar and chain facing away from the operator.
• Ensure the tool is secure during transport.

Storage

• Remove battery pack.
• Clean the chainsaw thoroughly.
• Install guide cover and place an absorbent pad under the bar.
• Store in a dry place, out of reach of children or pets.
• Use original packaging or cover to protect against dust.

NOTE: To prolong battery life, charge the battery pack at least once per year or when the LED indicator shows only one light.

Disposal

Do not dispose of waste product with household waste. Recycle where facilities exist. Contact local authorities or retailers for recycling advice.

Troubleshooting

Parts List

Warranty

LIMITED WARRANTY

• 5-year limited warranty on all Senix X2 series outdoor battery powered equipment.
• 3-year limited warranty on all Senix X2 batteries and chargers.

This warranty covers defects in materials or workmanship. It does not cover normal wear of parts, transportation costs, misuse, abuse, neglect, alteration, or unauthorized repairs. Warranty registration at www.senixtools.com is recommended.

Additional Limitations: Implied warranties are limited to three years for power tools and chargers, and seven years for batteries. The manufacturer is not responsible for incidental or consequential damages. This warranty gives you specific legal rights.

For customer service, contact 1-800-261-3981 or Senixtools.com.