Stihl 20 Inch Chainsaw Chain Guide (5 Pro Tips For Perfect Cuts)

I’ve heard it all – chains that never need sharpening (a blatant lie!), bars that last a lifetime (possible, but unlikely without meticulous care), and chainsaws that can cut through anything (don’t even try it with metal!). The truth is, even the best equipment, like my trusty Stihl with its 20-inch bar, requires knowledge, skill, and consistent maintenance to perform optimally and safely. So, let’s debunk some myths and dive into practical advice.

Choosing the Right Chain for Your Stihl 20-Inch Chainsaw

Selecting the right chain is paramount. It’s not a one-size-fits-all situation. The type of wood you’re cutting, your cutting style, and the overall condition of your saw play crucial roles.

Understanding Chain Types

There are primarily three types of chainsaw chains: full chisel, semi-chisel, and low-profile.

Full Chisel: These chains have square-cornered cutters that offer the fastest, most aggressive cut. They’re ideal for experienced users and clean wood. However, they dull quickly if they encounter dirt or debris. I use full chisel chains when felling trees in controlled environments where I know the wood is clean.
Semi-Chisel: These chains have rounded corners, making them more forgiving than full chisel chains. They’re a good all-around choice for cutting various types of wood, including those with some dirt or bark. Semi-chisel chains are my go-to for general firewood processing.
Low-Profile (or Micro-Chisel): These chains are designed for smaller chainsaws and users with less experience. They have a smaller cutter and produce less vibration, making them easier to control. While not ideal for large-scale cutting, they are safer for beginners.

Chain Pitch, Gauge, and Drive Links

These three measurements are critical for compatibility.

Pitch: This is the distance between any three consecutive rivets divided by two. Common pitches for 20-inch Stihl chainsaws are .325″ and 3/8″.
Gauge: This refers to the thickness of the drive links that fit into the guide bar groove. Common gauges are .050″ and .063″.
Drive Links: This is the number of drive links needed to fit your specific bar length. A 20-inch bar typically requires 72 drive links, but always verify this on your bar or in your chainsaw’s manual.

Actionable Tip: Always consult your Stihl chainsaw’s manual to determine the correct pitch, gauge, and number of drive links for your 20-inch bar. Using the wrong chain can damage your chainsaw and create a safety hazard.

My Personal Experience: The Wrong Chain Lesson

Years ago, I mistakenly purchased a chain with the wrong gauge for my Stihl. The chain would bind in the bar groove, causing excessive vibration and making it nearly impossible to cut straight. After struggling for an hour, I finally realized my mistake. This taught me a valuable lesson about the importance of verifying chain specifications.

Takeaway: Double-check your chainsaw manual and the chain packaging to ensure compatibility before installing a new chain.

Pro Tip #1: Mastering Chain Sharpening for Optimal Performance

A sharp chain is essential for safe and efficient cutting. A dull chain forces you to apply more pressure, increasing the risk of kickback and damaging your chainsaw.

When to Sharpen Your Chain

I sharpen my chain whenever I notice any of the following:

The saw requires excessive force to cut.
The saw produces fine sawdust instead of chips.
The saw pulls to one side while cutting.
I see visible damage to the cutters.

As a general rule, I sharpen my chain after every tank of gas, especially when cutting hardwood.

Sharpening Tools and Techniques

There are several ways to sharpen a chainsaw chain:

Hand Filing: This is the most common and affordable method. It requires a round file, a flat file, and a depth gauge tool.
Electric Chain Sharpener: This tool offers a faster and more precise sharpening, but it’s more expensive.
Bar-Mounted Sharpener: This is a convenient option for sharpening on the go.

Step-by-Step Hand Filing Guide

Secure the Chainsaw: Clamp the chainsaw in a vise or brace it securely on a stump.
Identify the Correct File Size: Use a round file that matches the pitch of your chain. Your chainsaw manual will specify the correct file size.
Set the Filing Angle: Most chainsaw chains have a filing angle of 30-35 degrees. Use the markings on the file guide to maintain the correct angle.
File Each Cutter: File each cutter with smooth, consistent strokes, pushing the file away from you. Maintain the same angle and pressure for each cutter. I usually aim for 3-5 strokes per cutter.
Check the Depth Gauges: Use a depth gauge tool to ensure the depth gauges are set correctly. If they are too high, the chain will not cut efficiently. File them down using a flat file.
Repeat for All Cutters: Rotate the chain and repeat the process for all cutters.

Data and Insights: In my experience, hand filing allows for more control and precision, especially when dealing with damaged cutters. Electric sharpeners can be faster, but they can also remove too much material if not used carefully.

My Personal Experience: The Importance of Depth Gauges

I once spent an entire afternoon struggling to cut through a large oak log. I had sharpened my chain meticulously, but the saw still wasn’t cutting properly. Finally, I realized that the depth gauges were too high. After filing them down, the saw cut through the log like butter. This experience taught me the importance of paying attention to every detail when sharpening.

Takeaway: Consistent chain sharpening is crucial for safety and efficiency. Learn to recognize the signs of a dull chain and sharpen it regularly. Don’t neglect the depth gauges!

Pro Tip #2: Optimizing Bar and Chain Oiling for Reduced Friction

Proper lubrication is essential for extending the life of your bar and chain. Insufficient lubrication leads to increased friction, overheating, and premature wear.

Choosing the Right Bar and Chain Oil

Use a high-quality bar and chain oil specifically designed for chainsaws. Avoid using motor oil or other substitutes, as they may not provide adequate lubrication and can damage your chainsaw. I prefer using a biodegradable bar and chain oil to minimize environmental impact.

Adjusting the Oiler

Most Stihl chainsaws have an adjustable oiler. Adjust the oiler to ensure that the chain is adequately lubricated without excessive oil consumption. I typically adjust the oiler so that a thin film of oil is visible on the chain after cutting.

Checking for Proper Oiling

To check for proper oiling, hold the chainsaw over a piece of cardboard and run it at full throttle. You should see a spray of oil coming off the chain. If you don’t see any oil, check the oil level, the oiler adjustment, and the oil filter.

Actionable Tip: Regularly clean the oiler port and the bar groove to prevent clogs.

My Personal Experience: The Importance of Biodegradable Oil

I used to use conventional bar and chain oil, but I switched to a biodegradable oil several years ago. I noticed a significant reduction in oil consumption and a cleaner working environment. Plus, I feel better knowing that I’m minimizing my environmental impact.

Takeaway: Use a high-quality bar and chain oil and adjust the oiler properly to ensure adequate lubrication. Regularly check for proper oiling and clean the oiler components.

Pro Tip #3: Mastering Cutting Techniques for Efficiency and Safety

Proper cutting techniques are essential for maximizing efficiency and minimizing the risk of kickback.

Felling Techniques

When felling a tree, always follow these steps:

Assess the Situation: Identify any hazards, such as power lines, buildings, or other trees. Plan your escape route.
Clear the Area: Remove any brush or debris from around the base of the tree.
Make the Notch: Cut a notch on the side of the tree in the direction you want it to fall. The notch should be about one-third of the tree’s diameter.
Make the Back Cut: Cut the back cut slightly above the notch, leaving a hinge of wood to guide the tree’s fall.
Wedge if Necessary: If the tree doesn’t start to fall on its own, use a wedge to help push it over.
Retreat Safely: Once the tree starts to fall, retreat quickly and safely along your planned escape route.

Data and Insights: According to OSHA, improper felling techniques are a leading cause of chainsaw accidents. Always take the time to plan your cuts and follow safe procedures.

Limbing Techniques

Limbing is the process of removing branches from a felled tree. Always stand on the uphill side of the tree and cut away from yourself. Use the bumper spike to pivot the saw and maintain control.

Bucking Techniques

Bucking is the process of cutting a log into shorter lengths. Use proper support techniques to prevent the log from pinching the saw.

Actionable Tip: When bucking a log, always cut from the top down if the log is supported at both ends, and from the bottom up if the log is supported in the middle.

My Personal Experience: Avoiding Kickback

I once experienced a severe kickback while limbing a tree. The saw kicked back violently, hitting me in the shoulder. Fortunately, I was wearing proper safety gear, including a chainsaw helmet and chaps, which prevented serious injury. This experience taught me the importance of maintaining a firm grip on the saw and avoiding cutting with the tip of the bar.

Takeaway: Learn and practice proper cutting techniques to maximize efficiency and minimize the risk of kickback. Always wear appropriate safety gear.

Pro Tip #4: Maintaining Your Stihl 20-Inch Chainsaw for Longevity

Regular maintenance is essential for extending the life of your Stihl chainsaw and ensuring optimal performance.

Air Filter Cleaning

Clean the air filter regularly, especially when cutting in dusty conditions. A clogged air filter restricts airflow, reducing engine power and increasing fuel consumption. I clean my air filter after every 5-10 hours of use.

Spark Plug Inspection

Inspect the spark plug regularly and replace it if necessary. A fouled spark plug can cause starting problems and reduced engine performance. I replace my spark plug annually.

Fuel Filter Replacement

Replace the fuel filter annually to prevent fuel line clogs.

Bar Maintenance

Clean the bar groove regularly to remove debris. Check the bar rails for wear and damage. If the rails are worn, dress them with a flat file.

Chain Tension Adjustment

Adjust the chain tension regularly to ensure that the chain is neither too loose nor too tight. A loose chain can derail, while a tight chain can overheat and damage the bar. I check the chain tension before each use.

Actionable Tip: Keep a log of your chainsaw maintenance activities to ensure that you don’t neglect any important tasks.

My Personal Experience: The Importance of Regular Maintenance

I once neglected to clean the air filter on my Stihl chainsaw for several months. The saw eventually started running poorly and became difficult to start. After cleaning the air filter, the saw ran like new again. This experience taught me the importance of regular maintenance.

Takeaway: Perform regular maintenance on your Stihl chainsaw to extend its life and ensure optimal performance. Follow the maintenance schedule in your chainsaw’s manual.

Pro Tip #5: Prioritizing Safety Gear for Protection

Chainsaw work is inherently dangerous. Always wear appropriate safety gear to protect yourself from injury.

Essential Safety Gear

Chainsaw Helmet: Protects your head from falling branches and kickback.
Eye Protection: Protects your eyes from flying debris. I prefer using safety glasses with side shields.
Hearing Protection: Protects your ears from the loud noise of the chainsaw. I use earplugs and earmuffs for maximum protection.
Chainsaw Chaps: Protect your legs from chainsaw cuts.
Gloves: Protect your hands and improve your grip.
Steel-Toed Boots: Protect your feet from falling logs and chainsaw cuts.

Data and Insights: Studies have shown that wearing appropriate safety gear can significantly reduce the risk of chainsaw injuries.

Additional Safety Precautions

Never operate a chainsaw when you are tired or under the influence of drugs or alcohol.
Always keep a firm grip on the chainsaw with both hands.
Never cut above shoulder height.
Be aware of your surroundings and avoid cutting in hazardous conditions.
Never allow bystanders within 20 feet of your work area.
Attend a chainsaw safety course to learn proper techniques and safety procedures.

Actionable Tip: Inspect your safety gear regularly for wear and damage. Replace any damaged gear immediately.

My Personal Experience: The Value of Chainsaw Chaps

I once accidentally touched my chainsaw to my leg while limbing a tree. Fortunately, I was wearing chainsaw chaps, which stopped the chain immediately. The chaps were severely damaged, but they saved me from a serious injury. This experience reinforced the importance of wearing proper safety gear.

Takeaway: Always prioritize safety when operating a chainsaw. Wear appropriate safety gear and follow safe operating procedures. Your health and well-being are worth more than any job.

These five pro tips are the foundation for safe, efficient, and enjoyable chainsaw use with your Stihl 20-inch. Remember, practice makes perfect, and a well-maintained saw is a safe saw. Now get out there and create some firewood!