To start a chainsaw, you follow a sequence of steps designed for safety and efficiency, including proper positioning, engaging the chain brake, and correctly using the choke and pull cord.
How Do You Start a Chainsaw?
Starting a chainsaw requires a precise sequence of actions to ensure both operator safety and proper engine function. This guide primarily focuses on gasoline-powered chainsaws, which are common for outdoor tasks and have a specific startup procedure.
Safety First: Pre-Start Checklist
Before attempting to start any chainsaw, always prioritize safety. A few crucial checks can prevent accidents and ensure the saw runs smoothly:
- Personal Protective Equipment (PPE): Always wear a helmet with face shield and hearing protection, safety glasses, cut-resistant gloves, chainsaw chaps, and steel-toed boots.
- Work Area: Ensure the area around you is clear of obstacles, debris, and other people or animals.
- Fuel and Oil: Check that both the fuel tank (mixed gasoline and 2-stroke oil) and the chain oil reservoir are adequately filled.
- Chain Sharpness and Tension: Verify the chain is sharp and tensioned correctly.
- Chain Brake: Confirm the chain brake is engaged (pushed forward) before starting. This is a critical safety feature that prevents the chain from moving inadvertently.
Step-by-Step Chainsaw Starting Procedure (Cold Engine)
Starting a cold chainsaw typically involves using the choke and a specific sequence for the starter cord.
1. Safe Starting Stance and Grip
Proper positioning and a firm grip are essential for safety and ease of starting.
- Stabilize the Chainsaw: Place the chainsaw on a firm, flat surface. A common and safe method is to place the saw body behind your right knee or secure it with your foot to prevent it from moving while you pull the cord. This provides stability and keeps the saw head away from your body.
- Engage Chain Brake: Ensure the chain brake is on (engaged) to prevent the chain from rotating during startup.
- Firm Grip: Maintain a very good grip on the front handle with your left hand. Your left wrist should be straight, and your thumb fully encircling the handle, providing maximum control. Your right hand will operate the pull cord.
2. Fueling and Priming
Depending on your chainsaw model, you might need to prime the fuel system.
- Primer Bulb: If your saw has a primer bulb (a small, clear bulb), press it several times until you see fuel in it or it feels firm. This helps draw fuel into the carburetor.
- Choke Lever: Move the choke lever to the "full choke" position. This enriches the fuel-air mixture for easier cold starts.
3. Starting the Engine
Once positioned and primed, you can attempt to start the engine.
- Pull Starter Cord: With your right hand, grasp the starter cord handle firmly. Pull the cord with a swift, steady motion until you feel resistance, then pull it briskly and fully, but avoid over-extending the cord. Do not let the cord snap back; guide it gently.
- Listen for "Pop": Often, a cold engine will "pop" or briefly fire after one or two pulls. This indicates the engine is receiving fuel.
- Disengage Choke (Half-Choke/Run): As soon as you hear the "pop," immediately push the choke lever to the "half-choke" or "run" position (consult your saw's manual; some saws automatically go to half-choke). Continuing to pull with full choke after the "pop" can flood the engine.
- Second Pull Sequence: Pull the starter cord again, typically one to three more times, until the engine starts and runs.
- Idle and Warm Up: Once the engine starts, let it run for a few seconds to warm up at a low idle.
- Disengage Chain Brake: Once the engine is running smoothly, disengage the chain brake (pull it back towards the handle) before you begin cutting.
Starting a Warm Engine
Starting a chainsaw that has recently been used is usually simpler:
- No Choke: A warm engine typically does not require the choke.
- Pull Cord: Simply pull the starter cord with the chain brake engaged until the engine starts.
- Idle: Allow it to idle for a moment, then disengage the chain brake.
Troubleshooting Common Starting Issues
| Issue | Possible Cause | Solution |
|---|---|---|
| Engine Won't Start | No fuel, stale fuel, clogged fuel filter | Check fuel level, replace stale fuel, clean/replace filter. |
| Engine Flooded | Too many full-choke pulls | Remove spark plug, dry it, pull starter cord with choke off to clear cylinders, then retry. |
| Weak Spark | Fouled or faulty spark plug, bad ignition coil | Clean or replace spark plug, check ignition coil. |
| No "Pop" | No fuel reaching carburetor, carburetor issues | Check fuel lines, primer bulb, consider professional servicing. |
Essential Resources for Chainsaw Safety
For detailed information on chainsaw operation and safety, always refer to your chainsaw's owner's manual and reputable sources:
- OSHA Chainsaw Safety: Guidelines and best practices for safe chainsaw use.
- STIHL Chainsaw Safety Manuals: Access to various safety and operating manuals.
- Husqvarna Chainsaw Safety: Practical tips for safe chainsaw handling.
By following these guidelines and always prioritizing safety, you can confidently start and operate your chainsaw.
