How to Change a Stihl Chainsaw Chain Easily and Safely
Can I change my Stihl chainsaw chain myself? Yes, you absolutely can change your Stihl chainsaw chain yourself with the right knowledge and tools. This guide will walk you through the entire process, making your Stihl chainsaw chain replacement straightforward and safe, ensuring your Stihl cutting chain is always ready for action.
Regular Stihl chainsaw maintenance is crucial for optimal performance and longevity. One of the most common and important maintenance tasks is changing the chainsaw chain. Whether your current chain is dull, damaged, or you’re simply switching to a different type of chain for a specific task, knowing how to do it correctly is essential. This guide focuses on making the Stihl chainsaw installation of a new chain as simple and safe as possible.
Preparing for Your Stihl Chainsaw Chain Replacement
Before you begin, gathering the necessary Stihl chainsaw parts and tools is key to a smooth process. This preparation helps avoid frustration and ensures you have everything you need to complete the job efficiently.
Essential Tools and Supplies:
- New Stihl Chainsaw Chain: Ensure it’s the correct gauge, pitch, and drive link count for your specific Stihl chainsaw model. Check your owner’s manual for this information.
- Stihl Chainsaw Bar: While not always necessary to replace, ensure your bar is in good condition. A worn or damaged bar can impact chain performance and safety.
- Chain Saw Wrench or Scrench: This is the multi-tool Stihl provides, usually with an all-in-one socket and screwdriver.
- Gloves: Heavy-duty work gloves protect your hands from sharp chain teeth and grease.
- Safety Glasses: Essential to protect your eyes from flying debris.
- Rags or Paper Towels: For cleaning up oil and debris.
- Owner’s Manual: Your best friend for model-specific instructions and parts.
Step-by-Step Guide to Stihl Chainsaw Chain Replacement
Following these steps will ensure your Stihl chainsaw chain replacement is done correctly, leading to safe and effective operation.
Step 1: Ensure the Chainsaw is Safely Prepared
Safety is paramount when working with any chainsaw. Start by ensuring the saw is in a safe, stable position.
- Disengage the Chain Brake: Make sure the chain brake is on before you start. This prevents accidental chain movement.
- Turn Off the Engine: The engine must be completely off and cool to the touch.
- Place on a Stable Surface: Position the chainsaw on a flat, stable surface where it won’t move. This allows you to work without worrying about the saw tipping over.
Step 2: Accessing the Chain and Sprocket Cover
To change the chain, you’ll need to remove the clutch cover, which also houses the chain brake mechanism.
- Locate the Clutch Cover Screws: Most Stihl chainsaws have two large screws holding the clutch cover in place. These are typically accessed from the top of the chainsaw.
- Loosen and Remove the Screws: Use your Stihl scrench or an appropriate socket wrench to loosen and remove these screws. Keep them in a safe place so you don’t lose them.
- Remove the Clutch Cover: Once the screws are out, carefully lift off the clutch cover. Be mindful of the chain brake lever and any other components that might be attached or seated within the cover. Set the cover aside in a clean spot.
Step 3: Releasing Tension on the Old Chain
Before you can remove the old chain, you need to relieve the tension on it.
- Identify the Tensioning Mechanism: Stihl chainsaws typically have a chain tensioner screw located on the side of the engine unit, near the bar mount. Some newer models might feature tool-less tensioning systems, but the principle is the same – you need to loosen the chain.
- Adjust the Tensioner: Use your scrench to turn the tensioning screw counter-clockwise. As you turn it, you’ll see the chain loosen its grip on the bar. Keep turning until the chain is slack enough to be easily pulled off the bar. You don’t need to remove the tensioner entirely.
Step 4: Removing the Old Chain and Bar (If Necessary)
Once the chain is slack, you can remove it. You might also need to remove the bar if it’s old or damaged, or if it’s easier to work with the chain off the bar.
- Slide the Old Chain Off: Carefully slide the old chain off the drive sprocket and out of the groove in the guide bar.
- Remove the Bar Nuts: Locate the nuts that secure the guide bar to the chainsaw body. These are usually on the side where you removed the clutch cover. Use your scrench to loosen and remove these nuts completely.
- Lift Off the Guide Bar: With the nuts removed, you should be able to lift the guide bar away from the chainsaw. You might need to gently wiggle it to free it from any locating pins.
Step 5: Inspecting the Stihl Chainsaw Bar and Chain Components
This is an excellent time to perform a thorough inspection of your Stihl chainsaw bar and chain components.
- Check the Guide Bar: Look for any signs of wear on the guide bar. The rails that the chain runs on should be even and not worn down. If the rails are uneven, or if there’s excessive wear, it’s time to replace the guide bar. Also, check the sprocket nose on the bar; if it’s stiff or won’t spin freely, it needs replacing. A worn bar can prematurely dull a new chain and cause unsafe cutting.
- Inspect the Drive Sprocket: While the bar is off, check the drive sprocket (the toothed wheel that drives the chain). If the teeth are worn down, hooked, or uneven, it needs to be replaced. A worn sprocket will chew up your new chain quickly. Stihl chainsaw parts for the sprocket are readily available.
- Clean the Area: Use a rag to clean out any sawdust, wood chips, or old oil from around the sprocket and bar mounting area.
Step 6: Installing the New Stihl Cutting Chain
Now it’s time for the new Stihl cutting chain to be installed.
- Position the New Chain: Place the new chain onto the drive sprocket, ensuring the drive links of the chain fit correctly into the sprocket teeth.
- Place the Guide Bar: Position the guide bar back onto the chainsaw body, aligning the bar’s groove with the chain. Make sure the drive links of the chain slide into the groove of the guide bar.
- Engage the Chain Tensioner: You will need to engage the chain tensioner screw to start taking up slack. Turn the tensioner screw clockwise. You’ll feel resistance as the chain tightens.
Table: Chain Direction Check
| Component | What to Look For | Importance |
|---|---|---|
| New Chain | Arrow indicating direction of travel. | Ensures the chain cuts efficiently and safely. |
| Drive Sprocket | Properly seated within the chain loop. | Critical for the chain to be driven by the engine. |
| Guide Bar | Aligned with mounting studs. | Correct alignment ensures the chain stays on track. |
| Drive Links | Fitted into sprocket teeth and bar groove | Proper seating is essential for power transfer and chain retention. |
Step 7: Setting the Correct Stihl Saw Chain Tensioning
Proper Stihl saw chain tensioning is one of the most critical steps for both safety and performance.
- Initial Tensioning: With the guide bar and chain in place, and the bar nuts loosely tightened, adjust the chain tensioner screw. Turn it clockwise until the chain is snug but can still be moved by hand.
- Check Chain Movement: Grab the chain with your gloved hand and try to pull it around the bar. It should move relatively freely but without excessive slack. There should be a slight drag, but it shouldn’t be impossible to move.
- Proper Sag: A good rule of thumb is to pull the chain away from the underside of the bar. It should lift slightly but then snap back down against the bar. If it stays lifted or hangs loose, it’s too slack. If you can’t move it at all, it’s too tight.
- Tighten Bar Nuts: Once you’re satisfied with the tension, firmly tighten the bar nuts with your scrench. Ensure the chain remains correctly tensioned as you tighten the nuts.
- Final Tension Check: After tightening the bar nuts, give the chain another spin by hand. It should still move freely, but without any significant slack. Re-adjust the tensioner if necessary.
Why is Correct Chain Tension So Important?
- Too Loose: A loose chain can derail off the bar, which is extremely dangerous. It can also lead to inefficient cutting and damage to the bar and sprocket.
- Too Tight: An overly tight chain puts excessive stress on the drive sprocket, the clutch, and the bearings. This can lead to premature wear and potential failure of these components. It also makes the saw harder to operate and can reduce cutting speed.
Step 8: Reattaching the Clutch Cover and Final Checks
The final steps involve putting everything back together and doing a final safety check.
- Replace the Clutch Cover: Carefully place the clutch cover back onto the chainsaw. Make sure any levers or components are seated correctly within the cover.
- Reinsert and Tighten Screws: Reinsert the two large screws that hold the clutch cover and tighten them securely with your scrench. Do not overtighten, as this can strip the threads.
- Check Chain Brake Functionality: With the cover back on, test the chain brake. Ensure it engages and disengages smoothly.
- Lubrication Check: Before starting the saw, ensure the Stihl chainsaw lubrication system is ready. Check the oil reservoir and make sure it’s filled with appropriate bar and chain oil. A functioning oiler is crucial for preventing the chain and bar from overheating and seizing.
Stihl Chainsaw Sharpening and Chain Care
While this guide is about changing the chain, remembering proper Stihl chainsaw sharpening is vital for extending the life of your cutting chain and ensuring efficient cutting. A sharp chain cuts wood, not just scrapes it. Keep a sharpening file and guide handy for regular touch-ups between full chain replacements.
Troubleshooting Common Stihl Chainsaw Chain Issues
Occasionally, you might encounter minor problems during the Stihl chainsaw installation process. Here’s a quick look at common Stihl chainsaw troubleshooting scenarios.
- Chain Won’t Stay Tight: This could indicate a worn drive sprocket or clutch drum. If the teeth are worn, they can’t grip the chain properly.
- Chain is Too Tight/Loose After Adjustment: Double-check that you are turning the tensioner screw in the correct direction. Ensure the bar is properly seated against the mounting studs.
- Chain Keeps Derailing: This is almost always a sign of incorrect tensioning (too loose) or a worn/damaged guide bar or drive sprocket.
- Bar Oil Not Reaching the Chain: Check your oil reservoir for adequate oil levels. Ensure the oiler hole on the bar is clear of debris. If the problem persists, there might be an issue with the internal oil pump.
Stihl Chainsaw Maintenance Schedule
Here’s a general guide for maintaining your Stihl chainsaw, with chain care being a key component.
- After Each Use:
- Clean the saw, especially around the bar and chain.
- Check chain tension and adjust if necessary.
- Check and refill bar and chain oil.
- Check and clean the air filter.
- Periodically (as needed or recommended by manual):
- Sharpen the chain if dull.
- Inspect guide bar for wear and damage.
- Inspect drive sprocket for wear.
- Check spark plug condition.
- Change fuel filter.
Frequently Asked Questions About Changing a Stihl Chainsaw Chain
Q1: How often should I change my Stihl chainsaw chain?
A1: The frequency of Stihl chainsaw chain replacement depends on usage and how well you maintain it. A chain typically lasts anywhere from a few months to over a year for light to moderate use. You’ll know it’s time when it becomes difficult to sharpen effectively, or if it’s visibly damaged (cracked, stretched, or broken teeth). Sharpness is key; if you find yourself needing to sharpen more often than usual, or if the chain won’t hold an edge, it’s time for a new one.
Q2: What is the correct pitch and gauge for my Stihl chainsaw chain?
A2: The correct pitch and gauge are specific to your Stihl chainsaw model. This information is usually found in your owner’s manual, often printed on the guide bar itself, or sometimes on a sticker on the chainsaw body. Using the wrong pitch or gauge can damage your saw and be very dangerous. Always refer to your manual or the guide bar markings.
Q3: Can I use a non-Stihl chain on my Stihl chainsaw?
A3: While it’s possible to use chains from other reputable manufacturers, it’s generally recommended to use genuine Stihl chainsaw parts, including chains. Stihl chains are designed to work optimally with their guide bars and saw engines. If you do use an aftermarket chain, ensure it precisely matches the specifications (pitch, gauge, drive link count) of the original Stihl chain recommended for your model.
Q4: What is the best way to store my Stihl chainsaw when not in use?
A4: Store your Stihl chainsaw in a clean, dry, and secure location. For longer storage periods, it’s advisable to run the engine briefly after it has cooled to ensure fresh fuel is in the carburetor. You can also drain the fuel tank completely. Clean the saw thoroughly and apply a light coat of oil to the chain and guide bar to prevent rust.
Q5: How do I know if my Stihl chainsaw bar needs replacing?
A5: Your Stihl chainsaw bar needs replacing if the rails where the chain runs are worn down unevenly, if they are significantly narrowed, or if the groove has become deeper than the height of the drive links. Another indicator is if the bar’s sprocket nose is stiff, won’t spin freely, or if its teeth are badly worn. You can often check for wear by holding a straight edge across the rails. Any significant deviation indicates it’s time for a new bar.
By following these detailed steps, you can confidently perform a Stihl chainsaw chain replacement, ensuring your saw remains a safe and efficient tool for all your cutting needs. Remember that consistent Stihl chainsaw maintenance, including proper lubrication and occasional Stihl chainsaw sharpening, will prolong the life of your equipment and contribute to safer operation.