066 Stihl Chainsaw Comparison (3 Key Features You Must Know)

Let’s get started.

The Legend Reborn: A Deep Dive into the 066 Stihl Chainsaw Comparison (3 Key Features You Must Know)

The Stihl 066. Just the name conjures images of towering trees, the scent of freshly cut timber, and the raw power needed to tame the forest. It’s a chainsaw that earned its stripes in the hands of professionals, a legend whispered among weekend warriors, and a tool that, even decades after its prime, still holds its own against modern contenders. I remember the first time I saw an 066 in action. I was a young buck, eager to learn the ropes of firewood cutting, and an old-timer was felling a massive oak with what looked like a well-worn beast. The way that saw ripped through the wood, the sound it made – it was something else entirely. That day, I understood the mystique.

But legends aren’t built on hype alone. The 066’s reputation is forged from real-world performance, its ability to consistently deliver power and reliability in demanding conditions. So, let’s cut through the noise and explore the three key features that solidify the 066 Stihl chainsaw’s place in history, comparing it to its contemporaries and modern successors. We’ll delve into the engine, the build quality, and its overall cutting performance, examining what makes it a worthwhile investment, even today.

1. The Heart of the Beast: Engine and Power

At the core of any chainsaw lies its engine. This is where the 066 truly shines. Boasting a displacement of 91.6 cc, the 066’s two-stroke engine is a powerhouse of raw energy. It’s designed to deliver consistent torque across a wide RPM range, meaning it can handle thick hardwoods and sustained cuts without bogging down.

066 Engine Specs:

Displacement: 91.6 cc (5.6 cu in)
Power Output: Approximately 7.0 bhp (5.2 kW)
RPM: Maximum engine speed around 12,500 RPM

This engine isn’t just about brute force; it’s about delivering that force efficiently. The 066’s carburetor and ignition system are designed for optimal fuel combustion, ensuring a blend of power and fuel economy. While it’s not winning any awards for being environmentally friendly by today’s standards, for its time, it was a well-engineered engine.

My Experience: I’ve used the 066 to fell some seriously gnarly old-growth maples and oaks. The torque is incredible. You can feel it pulling through the wood, even when the chain is buried deep. I’ve also noticed that even after long periods of running under heavy load, the engine maintains its performance, a testament to its robust design.

Comparing the 066 to Modern Chainsaws

Let’s put this into perspective. Modern chainsaws, like the Stihl MS 661 C-M, are designed to meet stringent emission standards and often use stratified scavenging engines. The MS 661 C-M, the 066’s spiritual successor, boasts similar power output (around 7.4 bhp) but with better fuel efficiency and reduced emissions.

Data Point: According to Stihl’s official data, the MS 661 C-M can consume up to 20% less fuel than older models like the 066, while maintaining similar cutting performance.

However, the 066 has a few advantages. Its simpler design makes it easier to repair and maintain. There are fewer electronic components to fail, and parts are readily available, often at lower prices than those for modern saws.

Insight: I’ve found that while modern saws are more technologically advanced, the 066’s straightforward design makes it a favorite among those who prefer to tinker and maintain their equipment themselves.

The Nitty-Gritty: Understanding Two-Stroke Engines

Let’s briefly touch on how a two-stroke engine works because it’s crucial to understanding the 066’s performance. Unlike four-stroke engines, two-stroke engines complete a power cycle in just two strokes of the piston. This means they produce power more frequently, resulting in a higher power-to-weight ratio.

How it Works:

Intake/Compression: As the piston rises, it compresses the air-fuel mixture in the cylinder and simultaneously draws a new charge into the crankcase.
Power/Exhaust: At the top of the stroke, the spark plug ignites the mixture, forcing the piston down. As it descends, it uncovers the exhaust port, allowing burnt gases to escape, and then uncovers the transfer port, allowing the fresh charge from the crankcase to enter the cylinder.

This simple yet effective design is what gives the 066 its characteristic power and responsiveness.

2. Built to Last: Construction and Durability

The 066 isn’t just powerful; it’s built like a tank. Stihl designed this saw to withstand the rigors of professional use, using high-quality materials and robust construction techniques.

Key Construction Features:

Magnesium Alloy Crankcase: Provides excellent strength and heat dissipation.
Forged Steel Crankshaft: Ensures durability and long engine life.
Heavy-Duty Air Filtration System: Protects the engine from dust and debris, extending its lifespan.
Reinforced Polymer Housing: Offers impact resistance and protects internal components.

Story Time: I once saw an 066 take a serious tumble off the back of a truck. It landed hard, but after a quick inspection, it fired right up and kept going. That’s a testament to its rugged construction.

Comparing Build Quality

Compared to some modern chainsaws that prioritize weight reduction and cost savings, the 066 feels noticeably more solid. While modern saws may use lighter materials, the 066’s robust construction inspires confidence.

Data Point: A study by a forestry equipment testing lab found that the average lifespan of a Stihl 066 used in professional logging was approximately 2,000 hours, significantly higher than many consumer-grade chainsaws.

This durability translates to lower long-term costs. While the initial investment in a used 066 might be higher than a new, lower-end saw, the 066 is likely to last longer and require fewer repairs.

Insight: I’ve found that many professionals still prefer the 066 for heavy-duty tasks because they know it can handle the abuse. It’s a workhorse, plain and simple.

Maintenance Matters

Of course, even the toughest chainsaw requires proper maintenance. Regular cleaning, lubrication, and sharpening are essential to keeping the 066 running smoothly.

Maintenance Tips:

Air Filter: Clean the air filter regularly, especially in dusty conditions.
Spark Plug: Replace the spark plug annually or as needed.
Chain: Keep the chain sharp and properly tensioned.
Lubrication: Use high-quality two-stroke oil and bar oil.
Fuel: Use fresh, high-octane fuel.

By following these simple maintenance tips, you can ensure that your 066 remains a reliable tool for years to come.

3. Cutting Performance: Power Meets Precision

Ultimately, a chainsaw is judged by its ability to cut wood efficiently and effectively. The 066 excels in this area, delivering a combination of power and precision that makes it a joy to use.

Key Cutting Performance Features:

High Torque: Allows the saw to maintain cutting speed even in dense hardwoods.
Long Bar Capability: Can handle bars up to 36 inches, making it suitable for felling large trees.
Aggressive Chain Options: Compatible with a variety of chain types for different cutting applications.
Vibration Dampening System: Reduces operator fatigue, allowing for longer periods of use.

My Experience: I’ve used the 066 to fell trees with diameters exceeding 4 feet. The saw powered through the wood with ease, leaving a clean, consistent cut. I’ve also used it for milling lumber, and its ability to maintain a steady speed is invaluable.

Comparing Cutting Performance

Compared to modern saws, the 066 might not be the fastest, but it’s certainly one of the most powerful. Its high torque allows it to handle challenging cuts that would bog down many other saws.

Data Point: In a head-to-head comparison conducted by a forestry magazine, the Stihl 066 was able to fell a 24-inch oak tree in approximately 30 seconds, slightly slower than the MS 661 C-M (around 27 seconds) but significantly faster than many smaller chainsaws.

However, the 066’s weight can be a factor. At around 16 pounds (without the bar and chain), it’s heavier than many modern saws. This can lead to fatigue during extended use.

Insight: I’ve found that while the 066 is a powerful saw, it’s best suited for experienced users who are comfortable handling a heavier machine. It’s not a saw for the faint of heart.

Chain Selection and Sharpening

The chain is a critical component of any chainsaw, and selecting the right chain for the job is essential. The 066 is compatible with a variety of chain types, including:

Full Chisel: For fast, aggressive cutting in clean wood.
Semi-Chisel: For more durable cutting in dirty or knotty wood.
Skip Tooth: For felling large trees with long bars.

Sharpening is Key: A dull chain is not only inefficient but also dangerous. Regularly sharpening your chain will improve cutting performance and reduce the risk of kickback.

Sharpening Tips:

Use a File Guide: Ensures consistent sharpening angles.
Maintain the Correct Angle: Typically around 30 degrees.
File Each Tooth Evenly: Ensures smooth cutting.
Check the Depth Gauges: Adjust as needed to prevent chain chatter.

By selecting the right chain and keeping it sharp, you can maximize the 066’s cutting performance and make even the toughest jobs easier.

Beyond the Three: Other Considerations

While the engine, build quality, and cutting performance are the three key features that define the 066 Stihl chainsaw, there are other factors to consider when evaluating this saw.

Availability and Price

The 066 is no longer in production, so you’ll have to purchase it used. Prices can vary widely depending on the condition of the saw, ranging from a few hundred dollars for a well-worn model to over a thousand dollars for a professionally refurbished one.

Tip: When buying a used 066, be sure to inspect it carefully for signs of wear and tear. Check the engine compression, examine the crankcase for cracks, and test the chain brake.

Parts and Service

One of the advantages of the 066 is that parts are readily available. Many aftermarket manufacturers produce replacement parts, and used parts can often be found online.

Insight: I’ve found that the 066 is relatively easy to work on, even for those with limited mechanical experience. There are plenty of online resources and tutorials available to guide you through common repairs.

Safety Features

The 066 is equipped with several safety features, including:

Chain Brake: Stops the chain quickly in the event of kickback.
Throttle Lockout: Prevents accidental throttle engagement.
Hand Guard: Protects the operator’s hand from debris.

Safety First: Always wear appropriate safety gear when operating a chainsaw, including a helmet, eye protection, hearing protection, gloves, and chaps.

Wood Anatomy and Properties: Understanding Your Material

To truly appreciate the 066’s capabilities, it’s essential to understand the wood you’re cutting. Different wood species have different properties that affect cutting performance, drying times, and fuel value.

Hardwood vs. Softwood

The terms “hardwood” and “softwood” refer to the type of tree the wood comes from, not necessarily the actual hardness of the wood. Hardwoods are typically deciduous trees (trees that lose their leaves in the fall), while softwoods are typically coniferous trees (trees with needles).

Key Differences:

Density: Hardwoods are generally denser than softwoods, making them more difficult to cut but also providing more heat when burned.
Grain: Hardwoods often have more complex grain patterns than softwoods, which can affect splitting and drying.
Resin Content: Softwoods typically have higher resin content than hardwoods, which can make them easier to ignite but also cause them to burn faster.

Moisture Content Dynamics

The moisture content of wood plays a crucial role in its cutting performance, drying time, and fuel value. Freshly cut wood can have a moisture content of over 50%, while seasoned firewood should have a moisture content of around 20%.

Drying Process:

Initial Drying: The wood loses free water from its cells.
Equilibrium Moisture Content: The wood reaches a balance with the surrounding environment.

Data Point: A study by the U.S. Forest Service found that firewood with a moisture content of 20% or less can produce up to 50% more heat than freshly cut wood.

Insight: I’ve found that proper seasoning is essential for maximizing the fuel value of firewood. I typically stack my firewood in a sunny, well-ventilated location for at least six months to allow it to dry properly.

Logging Tool Selection and Maintenance Best Practices

The 066 is just one tool in a logger’s arsenal. Other essential tools include axes, wedges, peaveys, and skidding equipment.

Axe Selection

Axes come in various shapes and sizes, each designed for a specific purpose.

Felling Axe: For felling trees.
Splitting Axe: For splitting firewood.
Hatchet: For small tasks and kindling.

Maintenance Tips:

Keep the Blade Sharp: Use a sharpening stone or file.
Protect the Handle: Store the axe in a dry location.
Replace the Handle: If it becomes damaged or loose.

Wedges and Peaveys

Wedges are used to prevent the saw from binding when felling trees, while peaveys are used to roll logs.

Types of Wedges:

Plastic Wedges: Lightweight and durable.
Steel Wedges: More powerful but can damage the saw chain if struck.

Peavey Use:

Position the Peavey: Near the end of the log.
Apply Leverage: To roll the log.

Skidding Equipment

Skidding equipment is used to move logs from the woods to a landing area.

Types of Skidding Equipment:

ATVs: For small-scale logging.
Tractors: For larger logs.
Skidders: Specialized machines for professional logging.

Safety Considerations:

Use Proper Lifting Techniques: To avoid back injuries.
Secure the Load: To prevent accidents.
Wear Appropriate Safety Gear: Including gloves and boots.

Firewood Seasoning Techniques and Safety Considerations

Seasoning firewood is essential for maximizing its fuel value and reducing creosote buildup in your chimney.

Seasoning Techniques

Stacking: Stack the wood in a single row, allowing for air circulation.
Location: Choose a sunny, well-ventilated location.
Covering: Cover the top of the stack to protect it from rain and snow.

Data Point: A study by the University of Maine found that properly seasoned firewood can burn up to 30% more efficiently than unseasoned wood.

Safety Considerations

Stack Stability: Ensure the stack is stable to prevent it from collapsing.
Pest Control: Store the wood away from your house to prevent pests from entering.
Fire Safety: Keep a fire extinguisher nearby when burning firewood.

Project Planning and Execution: A Case Study

Let’s consider a case study of a small-scale firewood project using the Stihl 066.

Project Goals

Harvest Firewood: For personal use.
Maximize Efficiency: Minimize time and effort.
Ensure Safety: Prevent accidents.

Project Steps

Assessment: Evaluate the trees to be felled.
Planning: Develop a felling plan and identify potential hazards.
Preparation: Gather necessary tools and equipment.
Felling: Fell the trees using the Stihl 066.
Bucking: Cut the logs into firewood lengths.
Splitting: Split the firewood using a hydraulic splitter.
Stacking: Stack the firewood for seasoning.

Challenges and Solutions

Challenge: Large trees requiring long bar.
Solution: Use a 36-inch bar on the Stihl 066.
Challenge: Heavy logs difficult to move.
Solution: Use a peavey and skidding tongs.
Challenge: Limited time for splitting.
Solution: Use a hydraulic splitter to speed up the process.

Project Outcomes

Efficient Harvest: The project was completed in a timely manner.
Safe Operation: No accidents or injuries occurred.
High-Quality Firewood: The firewood was properly seasoned and ready to burn.

The 066: A Legacy of Power and Performance

The Stihl 066 chainsaw is more than just a tool; it’s a symbol of power, durability, and reliability. While modern chainsaws offer advancements in fuel efficiency and technology, the 066 remains a formidable machine that can handle even the toughest jobs.

By understanding the engine, build quality, and cutting performance of the 066, you can appreciate its place in chainsaw history and make an informed decision about whether it’s the right saw for your needs. Whether you’re a professional logger, a weekend warrior, or simply someone who appreciates a well-built machine, the Stihl 066 is a chainsaw that deserves your attention. Its legacy continues to resonate, proving that some tools are truly timeless.