20 Inch Gas Chainsaw for Mid-Level Use (Top Picks & Expert Insights)

20-Inch Gas Chainsaw for Mid-Level Use: Top Picks & Expert Insights

There’s a certain primal satisfaction in providing for your family and heating your home with wood. For me, that satisfaction is deeply rooted in the rhythm of the forest – the scent of freshly cut timber, the satisfying thud of a perfectly split log, and the warmth radiating from a crackling fire on a cold winter’s night. But this lifestyle, this connection to nature’s raw energy, demands the right tools. A dull axe or an underpowered chainsaw can turn a rewarding task into a frustrating ordeal. That’s where the 20-inch gas chainsaw comes in. It’s the sweet spot for those of us who need more power than a homeowner model offers but aren’t tackling professional-grade logging every day. It’s the workhorse for property owners, homesteaders, and serious firewood cutters.

This guide is designed to help you navigate the world of 20-inch gas chainsaws. I’ll share my personal experiences, backed by technical details and industry insights, to help you choose the right tool for your needs. I’ll cover everything from engine specs and safety features to maintenance tips and cutting techniques. Let’s get started.

Understanding the “Mid-Level” User

Before diving into chainsaw models, let’s define what I mean by “mid-level” use. This category encompasses individuals who:

• Regularly cut firewood: Heating your home with wood is a commitment, and you need a chainsaw that can handle sustained use throughout the cutting season.
• Maintain larger properties: Clearing fallen trees, pruning branches, and managing overgrown areas are all part of property ownership.
• Occasionally tackle larger projects: Building a shed, milling small logs for hobby projects, or helping a friend with a tree removal – these tasks require more power and durability than a basic chainsaw can provide.
• Have some chainsaw experience: You’re not a complete novice, but you might not be a seasoned professional either. You understand basic chainsaw safety and maintenance but are looking to upgrade to a more capable machine.

If this sounds like you, then a 20-inch gas chainsaw is likely the perfect fit.

Why a 20-Inch Chainsaw? The Sweet Spot

The 20-inch bar length offers a great balance of power, maneuverability, and versatility. Here’s a breakdown of why it’s such a popular choice:

• Cutting Capacity: A 20-inch bar can comfortably handle trees with diameters up to 36 inches (remember to cut from both sides). This covers the vast majority of trees you’ll encounter on a typical property.
• Power and Performance: 20-inch chainsaws are typically powered by engines in the 50cc range, providing ample power for felling, limbing, and bucking.
• Weight and Maneuverability: While not as lightweight as smaller models, a 20-inch chainsaw is still manageable for extended use. The balance between power and weight is ideal for a variety of tasks.
• Versatility: From clearing brush to processing firewood, a 20-inch chainsaw can handle a wide range of cutting applications.

Top Picks: 20-Inch Gas Chainsaws for Mid-Level Use

Based on my experience, research, and feedback from other users, here are my top picks for 20-inch gas chainsaws in the mid-level category:

1. STIHL MS 271 Farm Boss

• Specifications:
  • Engine Displacement: 50.2 cc
  • Power Output: 3.49 bhp
  • Weight: 12.3 lbs (without bar and chain)
  • Bar Length: 20 inches
  • Fuel Capacity: 16.9 oz
  • Oil Capacity: 8.5 oz
• Why I Recommend It: The STIHL MS 271 Farm Boss is a legend for a reason. It’s a robust, reliable, and powerful chainsaw that can handle just about anything you throw at it. I’ve personally used this model for years, and it’s never let me down. The anti-vibration system is excellent, reducing fatigue during long cutting sessions. The side-access chain tensioner makes adjustments quick and easy.
• Technical Insights: The MS 271 features a stratified scavenging engine, which reduces emissions and increases fuel efficiency. This technology uses a layer of air between the fuel mixture and the exhaust gases, preventing unburned fuel from escaping into the atmosphere. This results in a cleaner-burning engine and longer run times on a single tank of fuel.
• Personal Story: I remember one particularly harsh winter where a major ice storm downed several large trees on my property. The Farm Boss was my lifeline. It powered through frozen limbs and thick trunks, allowing me to clear the debris and keep my wood stove burning. Its reliability in those tough conditions cemented my trust in this chainsaw.
• Limitations: It’s on the pricier side compared to some other models. The carburetor might require occasional adjustment, especially with varying fuel blends.

2. Husqvarna 455 Rancher

• Specifications:
  • Engine Displacement: 55.5 cc
  • Power Output: 3.49 hp
  • Weight: 13.2 lbs (without bar and chain)
  • Bar Length: 20 inches
  • Fuel Capacity: 15.22 oz
  • Oil Capacity: 9.52 oz
• Why I Recommend It: The Husqvarna 455 Rancher is another popular choice known for its durability and power. It’s slightly more powerful than the STIHL MS 271, making it a good option for tackling tougher jobs. The X-Torq engine technology reduces fuel consumption and emissions.
• Technical Insights: The X-Torq engine design in the 455 Rancher optimizes combustion, resulting in lower emissions and increased fuel efficiency. It achieves this by scavenging the cylinder with fresh air before the fuel mixture enters, reducing the amount of unburned fuel that escapes through the exhaust port.
• Personal Story: I have a friend who runs a small firewood business, and the 455 Rancher is his go-to saw. He’s put countless hours on it, and it’s still going strong. He appreciates the easy starting and the consistent power output, even when cutting through hardwoods.
• Limitations: It’s slightly heavier than the STIHL MS 271. Some users have reported issues with the chain brake mechanism over time.

3. Echo CS-590 Timber Wolf

• Specifications:
  • Engine Displacement: 59.8 cc
  • Power Output: 3.9 hp
  • Weight: 13.2 lbs (without bar and chain)
  • Bar Length: 20 inches
  • Fuel Capacity: 20.3 oz
  • Oil Capacity: 10.1 oz
• Why I Recommend It: The Echo CS-590 Timber Wolf is a powerful and affordable option. It boasts the largest engine displacement of the three, providing impressive cutting performance. It’s also known for its easy starting and user-friendly design.
• Technical Insights: The CS-590 features a heavy-duty air filtration system that protects the engine from dust and debris, extending its lifespan. This is particularly important if you’re working in dusty conditions or cutting dry, seasoned wood.
• Personal Story: I’ve used the CS-590 for clearing large areas of brush and small trees. Its power and torque make it easy to cut through dense vegetation. I also appreciate the large fuel tank, which allows for longer run times between refills.
• Limitations: The anti-vibration system is not as effective as the STIHL MS 271 or Husqvarna 455 Rancher. The plastic housing may not be as durable as the metal components found on some other models.

4. Poulan Pro PR5020

• Specifications:
  • Engine Displacement: 50cc
  • Power Output: Not Officially Listed, estimated around 3.2 hp
  • Weight: Approximately 13 lbs (without bar and chain)
  • Bar Length: 20 inches
  • Fuel Capacity: 16 oz (approximate)
  • Oil Capacity: 8 oz (approximate)
• Why I Recommend It: The Poulan Pro PR5020 is a budget-friendly option that still offers decent performance for occasional use. It’s a good choice for homeowners who need a chainsaw for basic tasks like cutting firewood and clearing small trees.
• Technical Insights: This model often features an automatic oiler, ensuring the chain stays lubricated during operation. While it’s not as advanced as some higher-end models, it’s a convenient feature for users who are new to chainsaws.
• Personal Story: A friend of mine, who is just getting into woodworking, bought this model for cutting logs into manageable sizes for his projects. He found it easy to start and use, and it’s been a reliable tool for his needs.
• Limitations: The build quality is not as robust as the STIHL or Husqvarna models. It may not be suitable for heavy-duty or prolonged use. The anti-vibration system is minimal, which can lead to fatigue during extended cutting sessions.

5. Craftsman CMXGSAMY426S

• Specifications:
  • Engine Displacement: 46cc
  • Power Output: Not Officially Listed, estimated around 3.0 hp
  • Weight: Approximately 12 lbs (without bar and chain)
  • Bar Length: 20 inches
  • Fuel Capacity: 15 oz (approximate)
  • Oil Capacity: 7 oz (approximate)
• Why I Recommend It: The Craftsman CMXGSAMY426S is another affordable option that provides a good balance of power and price. It’s suitable for homeowners who need a chainsaw for light to medium-duty tasks.
• Technical Insights: This model often features an easy-start technology, making it easier to start the engine, especially in cold weather. It also typically includes a cushioned handle for improved comfort during use.
• Personal Story: I’ve used this model for clearing fallen branches and cutting small trees around my property. It’s been a reliable tool for these tasks, and I appreciate its lightweight design.
• Limitations: The engine displacement is smaller than some of the other models on this list, so it may not be as powerful for cutting through large, dense logs. The build quality may not be as durable as higher-end models.

Key Features to Consider

When choosing a 20-inch gas chainsaw, consider these key features:

• Engine Displacement: Measured in cubic centimeters (cc), engine displacement indicates the size and power of the engine. Higher displacement generally means more power. For mid-level use, I recommend an engine in the 50cc to 60cc range.
• Power Output: Measured in horsepower (hp) or brake horsepower (bhp), power output indicates the amount of work the engine can perform. Look for a chainsaw with at least 3 hp for optimal performance.
• Weight: A lighter chainsaw is easier to maneuver and less fatiguing to use for extended periods. However, lighter chainsaws may sacrifice some power and durability.
• Bar Length: While we’re focusing on 20-inch chainsaws, it’s important to note that the actual cutting capacity depends on the type of wood and the sharpness of the chain.
• Anti-Vibration System: An effective anti-vibration system reduces the amount of vibration transmitted to your hands and arms, reducing fatigue and the risk of long-term health problems.
• Chain Tensioning System: A side-access chain tensioner makes it easy to adjust the chain tension without the need for tools.
• Fuel and Oil Capacity: A larger fuel and oil capacity allows for longer run times between refills.
• Safety Features: Look for safety features like a chain brake, throttle lock, and hand guard.

Understanding Chainsaw Chains

The chain is the heart of your chainsaw. Choosing the right chain is crucial for optimal performance and safety. Here’s a quick overview:

• Chain Pitch: The distance between three consecutive rivets on the chain, divided by two. Common pitches include 0.325″, 3/8″, and 0.404″. The pitch must match the sprocket on your chainsaw.
• Chain Gauge: The thickness of the drive links that fit into the guide bar groove. Common gauges include 0.050″, 0.058″, and 0.063″. The gauge must match the guide bar.
• Chain Type:
  • Full Chisel: Aggressive cutting action, ideal for experienced users.
  • Semi-Chisel: More forgiving than full chisel, suitable for a wider range of users.
  • Low-Profile: Reduced kickback risk, ideal for beginners.

Always refer to your chainsaw’s manual for the correct chain specifications.

Safety First: Essential Gear and Practices

Chainsaws are powerful tools that can cause serious injury if used improperly. Always wear the following safety gear:

• Chainsaw Helmet: Protects your head from falling debris and kickback.
• Eye Protection: Safety glasses or a face shield protect your eyes from flying chips and debris.
• Hearing Protection: Earplugs or earmuffs protect your hearing from the loud noise of the chainsaw.
• Chainsaw Gloves: Provide a secure grip and protect your hands from cuts and abrasions.
• Chainsaw Chaps: Protect your legs from accidental contact with the chain.
• Steel-Toed Boots: Protect your feet from falling logs and accidental cuts.

Safety Practices:

• Read the Manual: Familiarize yourself with the chainsaw’s operating instructions and safety precautions.
• Inspect the Chainsaw: Before each use, inspect the chainsaw for any damage or loose parts.
• Start the Chainsaw Safely: Follow the manufacturer’s instructions for starting the chainsaw.
• Maintain a Safe Distance: Keep bystanders at least 50 feet away from the cutting area.
• Use Proper Cutting Techniques: Learn and practice proper cutting techniques to avoid kickback and other hazards.
• Never Cut Above Shoulder Height: This increases the risk of losing control of the chainsaw.
• Be Aware of Your Surroundings: Watch out for obstacles, power lines, and other hazards.
• Take Breaks: Avoid fatigue by taking regular breaks during long cutting sessions.

Maintenance: Keeping Your Chainsaw Running Smoothly

Regular maintenance is essential for keeping your chainsaw running smoothly and extending its lifespan. Here are some key maintenance tasks:

• Sharpen the Chain: A sharp chain cuts faster, safer, and more efficiently. Sharpen the chain regularly using a chainsaw file or a chain grinder. I personally prefer using a chainsaw file for field sharpening, as it’s quick and easy to use.
• Clean the Air Filter: A clean air filter ensures proper airflow to the engine. Clean the air filter regularly with compressed air or soap and water.
• Clean the Spark Plug: A clean spark plug ensures reliable ignition. Clean the spark plug with a wire brush or replace it if necessary.
• Check the Fuel and Oil Levels: Always check the fuel and oil levels before each use. Use the correct fuel and oil mixture as specified in the owner’s manual.
• Lubricate the Bar and Chain: Use chainsaw bar and chain oil to lubricate the bar and chain. This reduces friction and wear.
• Clean the Bar Groove: The bar groove can become clogged with sawdust and debris. Clean the bar groove regularly with a screwdriver or a bar groove cleaner.
• Inspect the Sprocket: Inspect the sprocket for wear and replace it if necessary.
• Store the Chainsaw Properly: Store the chainsaw in a dry, clean place. Drain the fuel tank before storing the chainsaw for extended periods.

Fuel and Oil: The Lifeblood of Your Chainsaw

Using the correct fuel and oil mixture is crucial for the health and performance of your chainsaw.

• Fuel: Use fresh, high-octane gasoline. Avoid using old or stale gasoline, as it can damage the engine.
• Oil: Use a high-quality two-stroke oil specifically designed for chainsaws. Mix the oil with gasoline according to the manufacturer’s instructions. A common ratio is 50:1 (50 parts gasoline to 1 part oil).
• Bar and Chain Oil: Use chainsaw bar and chain oil to lubricate the bar and chain. This reduces friction and wear. Avoid using motor oil or other substitutes, as they can damage the bar and chain.

Cutting Techniques: Mastering the Art of Chainsaw Operation

Proper cutting techniques are essential for safety and efficiency. Here are some basic cutting techniques:

• Felling: The process of cutting down a tree. This requires careful planning and execution.
  • Directional Felling: Aiming the fall of the tree in a specific direction. This is crucial for safety and minimizing damage to surrounding trees.
  • Undercut: A notch cut on the side of the tree facing the desired direction of fall. This helps guide the tree’s fall. The undercut should be about 1/3 of the tree’s diameter.
  • Back Cut: A cut made on the opposite side of the tree, slightly above the undercut. Hardwoods generally burn longer and produce more heat than softwoods. Here’s a breakdown of common firewood species:
    • Hardwoods:
      • Oak: Excellent heat output, long burning time.
        • Technical Insight: Oak has a high density, typically around 0.75 g/cm³, which contributes to its slow burning rate and high BTU (British Thermal Unit) output per cord.
      • Maple: Good heat output, easy to split.
        • Technical Insight: Maple’s density ranges from 0.6 to 0.7 g/cm³, making it a good compromise between heat output and ease of processing.
      • Birch: Burns quickly, produces good heat.
        • Technical Insight: Birch has a lower density compared to oak and maple, usually around 0.6 g/cm³, which means it burns faster but is easier to ignite.
      • Ash: Excellent heat output, easy to split.
        • Technical Insight: Ash is known for its relatively low moisture content when green, often around 50%, which helps it season faster compared to other hardwoods.
    • Softwoods:
      • Pine: Burns quickly, produces less heat.
        • Technical Insight: Pine has a low density, typically around 0.4 g/cm³, and a high resin content, which contributes to its fast burning rate and smoky flame.
      • Fir: Similar to pine, burns quickly, produces less heat.
        • Technical Insight: Fir species generally have a density similar to pine, making them suitable for kindling but less ideal for sustained heat.
      • Spruce: Burns quickly, produces less heat.
        • Technical Insight: Spruce is often used as pulpwood due to its fiber characteristics, but it’s not a preferred firewood due to its low heat output.

    Moisture Content:

    The moisture content of firewood is crucial for efficient burning. Green wood (freshly cut wood) contains a high amount of moisture, which reduces its heat output and can cause it to smoke excessively. Firewood should be seasoned (dried) for at least six months to reduce its moisture content to below 20%.

    • Green Wood: Moisture content above 50%. Difficult to ignite, produces little heat, and creates a lot of smoke.
    • Seasoned Wood: Moisture content below 20%. Easy to ignite, produces high heat, and burns cleanly.

    Measuring Moisture Content:

    You can measure the moisture content of firewood using a moisture meter. Insert the probes of the moisture meter into a freshly split piece of wood. The meter will display the moisture content as a percentage.

    Firewood Preparation: From Log to Fireplace

    Preparing firewood involves several steps:

    1. Felling: As described earlier, carefully fell the tree.
    2. Limbing: Remove the branches from the fallen tree.
    3. Bucking: Cut the log into shorter lengths. A common length for firewood is 16 inches, but you can adjust the length to fit your fireplace or wood stove.
       • Technical Requirement: Ensure all firewood pieces are cut to a uniform length to maximize space efficiency in your wood storage area and ensure even burning in your fireplace or wood stove.
    4. Splitting: Split the logs into smaller pieces. This allows the wood to dry more quickly and makes it easier to handle.
       • Technical Detail: The ideal size for split firewood pieces is generally 4-6 inches in diameter. This allows for optimal airflow during burning and ensures the wood ignites easily.
    5. Stacking: Stack the firewood in a well-ventilated area to allow it to dry.
       • Best Practice: When stacking firewood, leave gaps between the rows to promote airflow. A good rule of thumb is to leave at least 2-3 inches between each row.
    6. Seasoning: Allow the firewood to season for at least six months, or preferably a year.
       • Drying Tolerances: The acceptable moisture content for seasoned firewood is typically below 20%. Use a moisture meter to verify the moisture content before burning.
    7. Storing: Store the seasoned firewood in a dry, covered area to protect it from rain and snow.
       • Storage Specifications: Store firewood off the ground to prevent moisture absorption and insect infestation. Use pallets or wooden planks to elevate the firewood stack.

    Case Study: Firewood Production on a Small Scale

    I recently worked with a local farmer who wanted to start producing firewood on a small scale to supplement his income. He had a small woodlot on his property that was overgrown with trees.

    • Project Goals:
      • Clear the overgrown woodlot.
      • Produce firewood for sale.
      • Generate additional income.
    • Equipment Used:
      • Husqvarna 455 Rancher chainsaw
      • Log splitter
      • Tractor with a trailer
      • Moisture meter
    • Process:
      1. Clearing the Woodlot: We used the Husqvarna 455 Rancher to fell the trees in the woodlot. We carefully planned the felling direction to avoid damaging surrounding trees and structures.
      2. Limbing and Bucking: We limbed the fallen trees and bucked them into 16-inch lengths.
      3. Splitting: We used a log splitter to split the logs into smaller pieces.
      4. Stacking and Seasoning: We stacked the firewood in a well-ventilated area and allowed it to season for six months.
      5. Measuring Moisture Content: We used a moisture meter to verify that the firewood had reached a moisture content below 20%.
      6. Selling: The farmer sold the seasoned firewood to local residents.
    • Results:
      • The farmer successfully cleared the overgrown woodlot.
      • He produced a significant amount of firewood for sale.
      • He generated additional income from the sale of firewood.
    • Lessons Learned:
      • Careful planning is essential for efficient firewood production.
      • Using the right equipment can significantly reduce the amount of labor required.
      • Seasoning firewood properly is crucial for producing high-quality firewood.
      • Marketing and sales are important for generating income from firewood production.

    Common Challenges and Solutions

    Producing firewood and using chainsaws effectively can present several challenges. Here are some common issues and their solutions:

    • Chainsaw Kickback:
      • Challenge: Kickback occurs when the tip of the chainsaw bar comes into contact with an object, causing the chainsaw to suddenly jump back towards the user.
      • Solution: Use proper cutting techniques, avoid cutting with the tip of the bar, and ensure the chainsaw has a functioning chain brake.
    • Chainsaw Chain Dullness:
      • Challenge: A dull chain cuts slowly, requires more effort, and increases the risk of kickback.
      • Solution: Sharpen the chain regularly using a chainsaw file or a chain grinder.
    • Firewood Seasoning Takes Too Long:
      • Challenge: Waiting six months or more for firewood to season can be inconvenient.
      • Solution: Split the firewood into smaller pieces, stack it in a well-ventilated area, and cover it to protect it from rain and snow. Consider using a firewood kiln for faster drying.
    • Sourcing Quality Chainsaw Parts:
      • Challenge: Finding reliable replacement parts for your chainsaw can be difficult, especially in remote areas.
      • Solution: Establish a relationship with a reputable chainsaw dealer or online retailer. Stock up on common replacement parts, such as chains, spark plugs, and air filters.
    • Dealing with Hardwoods:
      • Challenge: Hardwoods like oak and maple can be difficult to split and process.
      • Solution: Use a log splitter, sharpen your splitting axe or maul regularly, and consider using wedges to split particularly tough logs.
    • Environmental Considerations:
      • Challenge: Sustainable logging practices and responsible firewood harvesting are essential for protecting the environment.
      • Solution: Follow local forestry regulations, avoid clear-cutting, and replant trees to ensure the long-term health of the forest.
    • Personal Safety:
      • Challenge: Chainsaw operation presents inherent risks of injury.
      • Solution: Always wear appropriate safety gear, including a helmet, eye protection, hearing protection, chainsaw gloves, chainsaw chaps, and steel-toed boots. Follow safe cutting practices and never operate a chainsaw when fatigued or under the influence of alcohol or drugs.

    Final Thoughts: Investing in the Right Tool

    Choosing the right 20-inch gas chainsaw is an investment in your property, your comfort, and your safety. By carefully considering your needs, the key features of different models, and the safety precautions involved, you can select a chainsaw that will provide years of reliable service. Remember, a well-maintained chainsaw is a valuable tool that can make your wood processing tasks easier, safer, and more enjoyable. Now, go forth and conquer those logs!

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