660 Stihl Chainsaw for Sale (5 Tips for Safe Large-Tree Cutting)

Have you ever felt the raw power of a chainsaw vibrating in your hands, the air thick with the scent of freshly cut wood? There’s a primal satisfaction that comes from felling a tree, a sense of accomplishment that resonates deep within. But with great power comes great responsibility. The Stihl 660 chainsaw is a beast – a tool designed for tackling the biggest, most demanding jobs. If you’re considering buying a used Stihl 660 or already own one and are looking to maximize its potential while staying safe, you’ve come to the right place. I’ve spent years in the woods, learning the ins and outs of chainsaw operation, and I’m here to share my knowledge with you. This isn’t just about buying a chainsaw; it’s about understanding how to use it safely and effectively to conquer those large-tree cutting projects.

The Allure of the Stihl 660: A Logger’s Companion

The Stihl 660, often referred to as the “066” by those in the know, has earned a legendary reputation in the logging and tree-felling world. It’s a powerful, robust machine designed to handle the most challenging tasks. But why is it so sought after, especially on the used market?

Why the 660 Remains a Top Choice

• Raw Power: The 660 boasts a high-displacement engine, providing the torque needed to power through large-diameter trees. This is crucial when dealing with hardwoods like oak or maple.
• Durability: Stihl is known for its build quality, and the 660 is no exception. With proper maintenance, these saws can last for decades, making them a solid investment, even used.
• Availability of Parts: Despite being an older model, parts for the 660 are still readily available, both OEM (Original Equipment Manufacturer) and aftermarket. This ensures you can keep your saw running smoothly for years to come.
• Proven Track Record: The 660 has a long history of reliable performance in the field. Loggers and tree service professionals have relied on this saw for decades, and its reputation speaks for itself.

Understanding the Used Market

When searching for a used Stihl 660, you’ll encounter a wide range of prices and conditions. It’s essential to do your homework and inspect the saw thoroughly before making a purchase.

• Price Range: Used Stihl 660s can range from \$500 to \$1200 or more, depending on condition, age, and included accessories.
• Common Issues: Be on the lookout for common problems such as worn cylinders, damaged crankshafts, and carburetor issues. A compression test is a must before buying.
• Where to Buy: Popular places to find used Stihl 660s include online marketplaces like eBay and Craigslist, as well as local pawn shops and equipment dealers.

Wood Anatomy and Properties: Knowing Your Enemy

Before you even think about firing up your Stihl 660, it’s crucial to understand the wood you’ll be cutting. Different species have different properties, and these properties directly impact how you approach the cutting process.

Hardwood vs. Softwood: The Fundamental Difference

• Hardwoods: Typically deciduous trees (lose their leaves annually) like oak, maple, and ash. They are denser, heavier, and more difficult to cut than softwoods. Hardwoods generally have a higher BTU (British Thermal Unit) rating, meaning they produce more heat when burned as firewood.
• Softwoods: Typically coniferous trees (evergreens) like pine, fir, and spruce. They are less dense, lighter, and easier to cut. Softwoods tend to dry faster than hardwoods, but they also burn faster and produce more smoke.

Key Wood Properties to Consider

• Moisture Content: This is the percentage of water in the wood. Freshly cut (“green”) wood can have a moisture content of 50% or higher. Seasoned firewood should have a moisture content of 20% or less. High moisture content makes wood harder to cut and significantly reduces its heating value. I once tried to split some freshly felled oak with a moisture content I estimated to be around 60%. It was like trying to split rubber – the wood just absorbed the impact.
• Density: Density is a measure of the mass of wood per unit volume. Denser woods are harder to cut and provide more heat when burned.
• Grain Pattern: The grain pattern affects how the wood splits and cuts. Straight-grained wood is easier to split than wood with knots or twisted grain.
• Knots: Knots are points where branches grew from the tree. They are harder than the surrounding wood and can cause the chainsaw to bind or kickback. I’ve had my chain pinched more times than I can count by hidden knots lurking just below the surface. Always be prepared for the unexpected when cutting around knots.
• Reaction Wood: This is wood that forms in response to stress, such as wind or gravity. It can be under tension or compression, which can cause the wood to split or pinch the saw when cut.

Data Points and Statistics

• Moisture Content Impact: According to the USDA Forest Service, burning wood with a moisture content above 20% can reduce its heating value by as much as 50%.
• Density Comparison: Oak has a density of approximately 0.75 g/cm³, while pine has a density of approximately 0.45 g/cm³. This difference in density directly affects cutting effort and firewood value.
• Firewood BTU Ratings: Oak firewood typically has a BTU rating of around 25 million BTUs per cord, while pine firewood has a BTU rating of around 17 million BTUs per cord.

Logging Tool Selection and Maintenance Best Practices

The Stihl 660 is a powerful tool, but it’s only as good as the other tools you use and how well you maintain them. Proper tool selection and maintenance are essential for safety and efficiency.

Essential Logging Tools

• Chainsaw (Stihl 660): Obviously, the heart of the operation. Choose the right bar length for the size of trees you’ll be cutting. I generally prefer a 28-inch bar for most large-tree felling.
• Felling Axe or Maul: Used for driving wedges and splitting small logs. A good felling axe is an investment that will last a lifetime.
• Wedges: Plastic or metal wedges are used to prevent the saw from pinching and to help direct the fall of the tree. Always carry multiple wedges of different sizes.
• Felling Lever or Peavey: Used to help roll logs and position them for cutting. A peavey is invaluable for moving larger logs.
• Measuring Tape: Essential for measuring log lengths and firewood dimensions.
• Chainsaw Files and Filing Guide: Sharpening your chain regularly is crucial for efficient cutting and safety. A dull chain is a dangerous chain.
• Fuel and Oil: Use the correct fuel mixture and bar oil as recommended by Stihl.
• First Aid Kit: A well-stocked first aid kit is a must-have in any logging operation.
• Personal Protective Equipment (PPE): This includes a helmet, eye protection, ear protection, chainsaw chaps, gloves, and steel-toed boots. I cannot stress enough how important PPE is. I’ve seen firsthand the devastating consequences of not wearing proper safety gear.

Chainsaw Maintenance: Keeping Your 660 Running Strong

• Sharpening the Chain: Sharpen your chain regularly, ideally after every tank of fuel. Use a chainsaw file and filing guide to maintain the correct cutting angles. A sharp chain will cut faster, smoother, and with less effort.
• Cleaning the Air Filter: A dirty air filter restricts airflow and can cause the engine to run poorly. Clean the air filter regularly with compressed air or soap and water.
• Checking the Spark Plug: Inspect the spark plug regularly and replace it if it’s fouled or worn.
• Lubricating the Bar and Chain: Ensure the bar and chain are properly lubricated with bar oil. Check the oil level frequently and adjust the oiler if necessary.
• Cleaning the Bar Groove: The bar groove can become clogged with sawdust and debris, which can prevent the chain from running smoothly. Clean the bar groove regularly with a screwdriver or a bar groove cleaner.
• Checking the Chain Tension: Proper chain tension is essential for safe and efficient cutting. The chain should be snug but still able to be pulled around the bar by hand.
• Storing the Chainsaw: When storing the chainsaw for an extended period, drain the fuel tank and run the engine until it stalls. This will prevent the carburetor from gumming up. Store the chainsaw in a dry place.

Data Points and Statistics

• Chain Sharpening Frequency: Studies have shown that sharpening your chainsaw chain after every tank of fuel can increase cutting efficiency by up to 20%.
• Air Filter Impact: A dirty air filter can reduce engine power by up to 10%.
• PPE Effectiveness: According to the CDC, wearing chainsaw chaps can reduce the risk of leg injuries by up to 80%.

5 Tips for Safe Large-Tree Cutting with the Stihl 660

Now that you understand the wood and have the right tools, let’s get into the nitty-gritty of safe large-tree cutting. The Stihl 660 is a powerful machine, and it demands respect. These five tips are crucial for minimizing risks and maximizing efficiency.

Tip 1: Plan Your Felling Operation

• Assess the Tree: Before you even touch the chainsaw, take a good look at the tree. Identify any lean, branches, or other factors that could affect its fall. Look for signs of decay or disease.
• Determine the Felling Direction: Choose a felling direction that is safe and clear of obstacles. Consider the wind direction, the slope of the ground, and the location of any nearby buildings or power lines.
• Create Escape Routes: Plan two escape routes that are at a 45-degree angle away from the intended felling direction. Clear these routes of any obstacles.
• Inform Others: Let someone know where you’ll be working and when you expect to be finished. This is especially important if you’re working alone.

Tip 2: Master the Felling Cuts

• The Notch Cut (Face Cut): This cut determines the direction of the fall. It consists of two cuts: the upper cut, which is angled down at approximately 45 degrees, and the lower cut, which is horizontal and meets the upper cut to form a notch. The depth of the notch should be about one-third of the tree’s diameter.
• The Back Cut: This cut is made on the opposite side of the tree from the notch. It should be horizontal and slightly above the bottom of the notch. Leave a hinge of uncut wood between the back cut and the notch. The hinge controls the fall of the tree and prevents it from kicking back.
• Using Wedges: As you make the back cut, insert wedges into the cut to prevent the saw from pinching and to help direct the fall of the tree. Drive the wedges in firmly with a felling axe or maul.
• The Importance of the Hinge: The hinge is the most critical part of the felling cut. It should be of uniform thickness and aligned with the intended felling direction. A properly sized hinge will ensure that the tree falls safely and predictably.

Tip 3: Avoid Pinching and Kickback

• Pinching: Pinching occurs when the saw blade becomes trapped in the cut. This can be caused by the weight of the tree, internal stresses in the wood, or knots. To avoid pinching, use wedges to keep the cut open and maintain proper chain tension.
• Kickback: Kickback is a sudden and violent upward or backward movement of the chainsaw. It is usually caused by the tip of the bar contacting an object. To avoid kickback, always be aware of the position of the bar tip and avoid cutting with it. Use a reduced-kickback chain and maintain proper chain tension.
• Cutting Techniques: Use proper cutting techniques, such as plunge cutting and bore cutting, to avoid pinching and kickback. Plunge cutting involves inserting the tip of the bar into the wood and then pivoting the saw to make the cut. Bore cutting involves drilling a hole through the wood and then cutting outwards.

Tip 4: Utilize Proper Body Positioning and Stance

• Stable Stance: Maintain a wide and stable stance with your feet shoulder-width apart. Keep your weight balanced and avoid leaning too far forward or backward.
• Grip: Grip the chainsaw firmly with both hands. Keep your thumbs wrapped around the handles.
• Arm Position: Keep your arms slightly bent and close to your body. This will give you more control over the saw and reduce fatigue.
• Avoid Overreaching: Avoid overreaching or cutting above shoulder height. This can lead to loss of control and increase the risk of injury.
• Moving with the Saw: Move your feet as you cut to maintain a comfortable and stable position. Avoid twisting your body or reaching too far.

Tip 5: Practice, Practice, Practice

• Start Small: Begin with smaller trees and gradually work your way up to larger ones. This will give you time to develop your skills and gain confidence.
• Seek Professional Training: Consider taking a chainsaw safety course from a qualified instructor. This will provide you with valuable knowledge and skills that can help you avoid accidents.
• Learn from Experienced Loggers: If possible, work with experienced loggers and learn from their techniques. They can provide you with valuable insights and tips that you won’t find in a textbook.
• Simulate Real-World Scenarios: Practice felling cuts on stumps or logs to simulate real-world scenarios. This will help you develop your muscle memory and improve your technique.
• Continuous Learning: Stay up-to-date on the latest safety techniques and best practices. Attend workshops and seminars, and read industry publications.

Data Points and Statistics

• Accident Causes: According to the US Consumer Product Safety Commission, the most common causes of chainsaw accidents are kickback, loss of control, and improper maintenance.
• Training Impact: Studies have shown that professional chainsaw training can reduce the risk of accidents by up to 50%.
• PPE Effectiveness: Wearing chainsaw chaps can reduce the risk of leg injuries by up to 80%.

Firewood Seasoning Techniques and Safety Considerations

Once you’ve felled the tree, the next step is to process it into firewood. Proper seasoning is essential for maximizing its heating value and minimizing smoke.

Why Season Firewood?

• Reduced Moisture Content: Seasoning reduces the moisture content of the wood, making it easier to ignite and burn.
• Increased Heating Value: Dry firewood produces more heat than wet firewood. As mentioned earlier, burning wood with a moisture content above 20% can reduce its heating value by as much as 50%.
• Reduced Smoke: Dry firewood produces less smoke than wet firewood. This is better for your health and the environment.
• Prevention of Rot and Decay: Seasoning helps to prevent rot and decay, which can reduce the quality of the firewood.

Seasoning Techniques

• Stacking: Stack the firewood in a single row, with the bark side up. This will allow the wood to dry more quickly.
• Elevating: Elevate the firewood off the ground using pallets or cinder blocks. This will improve airflow and prevent moisture from wicking up from the ground.
• Spacing: Leave space between the rows of firewood to allow for air circulation.
• Covering: Cover the top of the firewood pile with a tarp or shed roof to protect it from rain and snow. However, leave the sides open to allow for air circulation.
• Sunlight: Expose the firewood pile to sunlight as much as possible. Sunlight helps to dry the wood more quickly.
• Time: Allow the firewood to season for at least six months, and preferably a year or more. Hardwoods generally take longer to season than softwoods.

Safety Considerations

• Stacking Stability: Stack the firewood carefully to prevent it from collapsing. A collapsing firewood pile can cause serious injuries.
• Pest Control: Be aware of pests such as insects and rodents that may be attracted to firewood. Store the firewood away from your house to prevent these pests from entering your home.
• Fire Hazards: Store firewood away from flammable materials and sources of ignition. Keep a fire extinguisher nearby in case of a fire.
• Lifting Techniques: Use proper lifting techniques when handling firewood to avoid back injuries. Bend your knees and keep your back straight.
• Splitting Safety: Wear safety glasses and gloves when splitting firewood. Use a splitting maul or hydraulic splitter to reduce the risk of injury.

Data Points and Statistics

• Seasoning Time: According to the USDA Forest Service, hardwoods typically take 6-12 months to season, while softwoods typically take 3-6 months.
• Moisture Content Reduction: Firewood can lose up to 50% of its moisture content during the seasoning process.
• Heating Value Increase: Seasoned firewood can have up to 25% higher heating value than green firewood.

Project Planning and Execution: From Tree to Firewood

Putting it all together, let’s outline a step-by-step plan for safely and efficiently processing large trees into firewood using your Stihl 660.

Step 1: Assessment and Planning

• Identify the Tree: Select the tree you want to fell and assess its size, species, and condition.
• Plan the Felling Operation: Determine the felling direction, create escape routes, and inform others.
• Gather Your Tools: Assemble all the necessary tools, including the Stihl 660, felling axe, wedges, felling lever, measuring tape, chainsaw files, fuel, oil, first aid kit, and PPE.
• Inspect Your Equipment: Inspect your chainsaw and other tools to ensure they are in good working condition. Sharpen the chain and check the fuel and oil levels.

Step 2: Felling the Tree

• Clear the Area: Clear the area around the tree of any obstacles, such as brush, rocks, and debris.
• Make the Notch Cut: Make the notch cut on the side of the tree facing the intended felling direction.
• Make the Back Cut: Make the back cut on the opposite side of the tree from the notch. Leave a hinge of uncut wood between the back cut and the notch.
• Insert Wedges: Insert wedges into the back cut to prevent the saw from pinching and to help direct the fall of the tree.
• Fell the Tree: Continue driving in the wedges until the tree begins to fall. Stand clear of the tree as it falls.

Step 3: Bucking the Tree

• Assess the Log: Once the tree is on the ground, assess the log and plan your cuts.
• Support the Log: Support the log with other logs or rocks to prevent it from pinching the saw.
• Buck the Log: Use the Stihl 660 to buck the log into manageable lengths for splitting.
• Safety First: Be careful to avoid pinching and kickback when bucking the log. Use proper cutting techniques and maintain proper chain tension.

Step 4: Splitting the Firewood

• Choose Your Method: Choose your preferred method for splitting the firewood, whether it’s a splitting maul or a hydraulic splitter.
• Split the Wood: Split the wood into manageable sizes for burning.
• Safety First: Wear safety glasses and gloves when splitting the firewood. Use proper lifting techniques to avoid back injuries.

Step 5: Seasoning the Firewood

• Stack the Wood: Stack the firewood in a single row, with the bark side up.
• Elevate the Wood: Elevate the firewood off the ground using pallets or cinder blocks.
• Space the Rows: Leave space between the rows of firewood to allow for air circulation.
• Cover the Wood: Cover the top of the firewood pile with a tarp or shed roof to protect it from rain and snow.
• Wait: Allow the firewood to season for at least six months, and preferably a year or more.

Case Study: My Oak Firewood Project

A few years ago, I had the opportunity to fell a large oak tree that had been damaged in a storm. The tree was about 36 inches in diameter at the base and approximately 80 feet tall. I used my Stihl 660 with a 28-inch bar to fell the tree. The felling operation went smoothly, thanks to careful planning and execution.

After felling the tree, I bucked it into 16-inch lengths for firewood. The oak was incredibly dense and heavy, and it took a lot of effort to buck it into manageable pieces. I then split the firewood using a hydraulic splitter. The oak was tough to split, but the hydraulic splitter made the job much easier.

I stacked the firewood in a single row, elevated it off the ground with pallets, and covered the top with a tarp. I allowed the firewood to season for a full year before burning it. The seasoned oak firewood burned hot and long, providing excellent heat for my home during the winter months.

This project taught me the importance of proper planning, execution, and seasoning. It also reinforced my respect for the power and potential dangers of the Stihl 660 chainsaw.

Final Thoughts: Respect the Power

The Stihl 660 is a remarkable machine, capable of tackling the most demanding wood-cutting tasks. But it’s not a toy. It demands respect, knowledge, and a commitment to safety. By understanding wood properties, mastering essential techniques, and prioritizing safety, you can harness the power of the 660 to efficiently and safely process large trees into valuable firewood.

Remember, continuous learning and practice are key. Never stop honing your skills and staying informed about the latest safety practices. The woods are a rewarding place to work, but they can also be unforgiving. Approach every project with caution, respect, and a healthy dose of common sense.

Now, go forth and conquer those large trees – safely and responsibly! And remember, a sharp chain and a well-maintained saw are your best friends in the woods.

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