G660 Chainsaw Performance (5 Expert Tips For Woodcutters)

Introduction: The Roar of Progress: Chainsaw Trends and the G660’s Enduring Legacy

The world of woodcutting is changing faster than a seasoned logger can fell a towering oak. We’re seeing a surge in demand for sustainable forestry practices, coupled with advancements in chainsaw technology that promise greater efficiency and reduced environmental impact. Electric chainsaws are nipping at the heels of their gas-powered counterparts, and ergonomic designs are becoming increasingly crucial as woodcutters seek to minimize fatigue and prevent injuries.

Amidst this evolution, one chainsaw model continues to command respect and admiration: the Stihl G660. This beast of a machine has earned its reputation as a reliable workhorse, capable of tackling the most demanding tasks with unwavering power. But even the mightiest tool benefits from a little expert guidance.

As someone who’s spent countless hours wrestling with logs and transforming raw timber into usable fuel and building materials, I’ve come to deeply appreciate the G660’s capabilities. I remember one particularly brutal winter where a faulty hydraulic splitter left me relying solely on my G660 to process cords of firewood. It was a trial by fire, pushing both me and the saw to our limits. It was during that time that I truly understood the nuances of maximizing its performance.

In this article, I’m going to share five expert tips that will help you unlock the full potential of your G660 chainsaw. These aren’t just theoretical musings; they’re practical, battle-tested strategies honed through years of hands-on experience. Whether you’re a seasoned pro or a weekend warrior, these insights will enable you to cut faster, work smarter, and extend the lifespan of your trusty G660.

Key Takeaways:

Mastering Filing Techniques: Proper chain maintenance is paramount for optimal cutting speed and safety.
Optimizing Fuel Mixture: Using the correct fuel-to-oil ratio ensures peak engine performance and longevity.
Fine-Tuning Carburetor Settings: Adjusting the carburetor allows you to tailor the saw’s performance to specific cutting conditions.
Selecting the Right Bar and Chain: Choosing the appropriate cutting attachments maximizes efficiency and reduces strain on the engine.
Implementing Strategic Cutting Techniques: Employing proven methods minimizes kickback risk and improves overall control.

2. Sharpening Mastery: The Art and Science of Chain Filing

A dull chain is a woodcutter’s worst enemy. It not only slows you down but also increases the risk of kickback and puts unnecessary strain on the saw’s engine. I’ve seen countless woodcutters struggle with dull chains, wasting time and energy while producing subpar results. Sharpening your chain isn’t just about making it sharp; it’s about maintaining the correct angles and depths to ensure smooth, efficient cutting.

2.1 The Importance of Consistent Filing Angles

The key to effective chain sharpening lies in maintaining consistent filing angles. Every chain has specific angles for the cutter’s top plate and side plate, usually around 30-35 degrees for the top plate and 60 degrees for the side plate. These angles are crucial for the chain to bite into the wood effectively.

Using a filing guide is essential for achieving these angles consistently. I personally prefer a guide with adjustable settings, allowing me to fine-tune the angles based on the specific chain I’m using.

2.2 Step-by-Step Chain Sharpening Guide

Here’s a step-by-step guide to sharpening your chainsaw chain:

Secure the Saw: Clamp the chainsaw securely in a vise or use a specialized chainsaw filing stand. This will prevent the saw from moving while you’re filing.
Identify the Shortest Cutter: Examine the chain and identify the shortest cutter. This will be your reference point for filing all the other cutters to the same length.
Set the Filing Guide: Adjust the filing guide to the correct angles for your chain. Consult your chainsaw’s manual or the chain manufacturer’s specifications for the recommended angles.
File Each Cutter: Using smooth, consistent strokes, file each cutter until it is sharp and uniform in length. Maintain the correct angles and depth throughout the process.
Check the Depth Gauges: After sharpening the cutters, check the depth gauges (also known as rakers). These small projections in front of each cutter control the depth of cut. If the depth gauges are too high, the chain will not cut aggressively enough. If they are too low, the chain will grab and kickback.
File the Depth Gauges: Use a specialized depth gauge filing tool to lower the depth gauges to the correct height. The recommended height is typically around 0.025 inches (0.64 mm) below the top of the cutters.
Deburr the Cutters: After filing, use a fine-grit file to remove any burrs from the cutting edges. This will help prevent the chain from snagging or tearing the wood.

2.3 Expert Insights on Chain Maintenance

“A sharp chain is a safe chain.” This isn’t just a catchy saying; it’s a fundamental truth. A dull chain requires more force to cut, increasing the risk of kickback and other accidents.
File frequently. Don’t wait until the chain is completely dull before sharpening it. Touch up the chain every few tanks of fuel to maintain optimal cutting performance.
Use the right tools. Invest in quality filing tools, including a filing guide, round files, flat files, and a depth gauge filing tool.
Keep the chain clean. Remove sawdust and debris from the chain regularly to prevent it from clogging and dulling prematurely.

3. Fueling the Beast: Optimizing Fuel Mixture for Peak Performance

The G660’s engine is a marvel of engineering, but it’s also a delicate machine that requires the right fuel mixture to operate at its best. Using the wrong fuel-to-oil ratio can lead to a host of problems, including reduced power, overheating, and even engine damage. I’ve witnessed firsthand the consequences of neglecting this crucial aspect of chainsaw maintenance.

3.1 The Importance of the Correct Fuel-to-Oil Ratio

The recommended fuel-to-oil ratio for the G660 is typically 50:1, meaning 50 parts of gasoline to 1 part of two-stroke oil. This ratio provides the engine with the lubrication it needs to prevent wear and tear.

Using too little oil can cause the engine to overheat and seize, while using too much oil can lead to carbon buildup and reduced performance.

3.2 Choosing the Right Fuel and Oil

Gasoline: Use high-quality unleaded gasoline with an octane rating of 89 or higher. Avoid using gasoline that contains ethanol, as it can damage the engine’s fuel system.
Two-Stroke Oil: Use a high-quality two-stroke oil specifically designed for air-cooled engines. Synthetic oils offer superior lubrication and protection compared to conventional oils.

3.3 Mixing Fuel and Oil Properly

Use a Clean Container: Use a clean, dedicated fuel container to mix the fuel and oil. Avoid using containers that have been used for other purposes, as they may contain contaminants that can damage the engine.
Measure Accurately: Use a measuring cup or graduated cylinder to measure the fuel and oil accurately. Don’t rely on guesswork, as even small variations in the fuel-to-oil ratio can affect engine performance.
Mix Thoroughly: Pour the oil into the fuel container and shake vigorously for several minutes to ensure that the fuel and oil are thoroughly mixed.
Label the Container: Label the fuel container with the date and the fuel-to-oil ratio. This will help you keep track of your fuel mixture and prevent accidental misfueling.

3.4 Expert Insights on Fuel Management

“Fresh fuel is happy fuel.” Use fresh fuel whenever possible. Gasoline can degrade over time, especially if it’s stored in a non-airtight container.
Store fuel properly. Store fuel in a cool, dry place away from direct sunlight. Use a fuel stabilizer to extend the shelf life of the fuel.
Drain the fuel tank before storing the saw for extended periods. This will prevent the fuel from gumming up the carburetor and causing starting problems.
Consider pre-mixed fuel. Pre-mixed fuel offers convenience and eliminates the risk of mixing errors. However, it’s typically more expensive than mixing your own fuel.

4. Carburetor Calibration: Fine-Tuning for Optimal Performance

The carburetor is the heart of the G660’s engine, responsible for mixing air and fuel in the correct proportions. Adjusting the carburetor settings allows you to tailor the saw’s performance to specific cutting conditions and altitudes. A poorly adjusted carburetor can lead to a variety of problems, including poor starting, rough idling, and reduced power. I’ve encountered situations where a simple carburetor adjustment transformed a sluggish saw into a cutting machine.

4.1 Understanding Carburetor Settings

The G660’s carburetor typically has three adjustment screws:

Low-Speed (L) Screw: Controls the fuel mixture at idle and low speeds.
High-Speed (H) Screw: Controls the fuel mixture at high speeds.
Idle Speed (LA) Screw: Controls the engine’s idle speed.

4.2 Adjusting the Carburetor

Important Note: Carburetor adjustment should only be performed by experienced individuals who are familiar with chainsaw engines. Incorrect adjustments can damage the engine.

Warm Up the Engine: Start the engine and let it warm up for several minutes.
Adjust the Low-Speed (L) Screw: Turn the low-speed screw clockwise until the engine starts to stumble or die. Then, turn the screw counterclockwise until the engine runs smoothly and accelerates crisply.
Adjust the High-Speed (H) Screw: Make a test cut in a piece of wood. If the engine bogs down or smokes excessively, turn the high-speed screw counterclockwise slightly. If the engine runs lean or sounds like it’s screaming, turn the high-speed screw clockwise slightly.
Adjust the Idle Speed (LA) Screw: Turn the idle speed screw until the chain stops moving at idle. The engine should idle smoothly without stalling.

4.3 Expert Insights on Carburetor Tuning

“Listen to your engine.” The engine’s sound can tell you a lot about its performance. A well-tuned engine will run smoothly and efficiently.
Adjust the carburetor based on altitude. At higher altitudes, the air is thinner, requiring a leaner fuel mixture.
Use a tachometer to verify the engine’s RPM. The G660’s maximum RPM is typically around 13,500.
If you’re not comfortable adjusting the carburetor yourself, take the saw to a qualified technician.

5. Bar and Chain Synergy: Selecting the Right Cutting Attachments

The bar and chain are the cutting heart of the chainsaw, and choosing the right attachments can significantly impact its performance. The G660 is a powerful saw that can handle a wide range of bar lengths and chain types. I’ve seen woodcutters struggle with mismatched bars and chains, resulting in poor cutting performance and increased risk of kickback.

5.1 Choosing the Right Bar Length

The appropriate bar length depends on the size of the trees you’ll be cutting. A longer bar allows you to fell larger trees, but it also increases the risk of kickback and reduces the saw’s maneuverability.

For felling trees up to 24 inches in diameter, a 20-inch bar is typically sufficient.
For felling trees up to 36 inches in diameter, a 25-inch bar is recommended.
For felling trees larger than 36 inches in diameter, a 32-inch or longer bar may be necessary.

5.2 Selecting the Right Chain Type

There are several different types of chainsaw chains available, each designed for specific cutting applications.

Full-Chisel Chains: These chains have square-cornered cutters that cut aggressively and efficiently. They are best suited for cutting clean, softwoods.
Semi-Chisel Chains: These chains have rounded-cornered cutters that are more durable and less prone to damage than full-chisel chains. They are a good all-around choice for cutting both softwoods and hardwoods.
Low-Kickback Chains: These chains have features that reduce the risk of kickback. They are a good choice for inexperienced users or for cutting in situations where kickback is a concern.

5.3 Expert Insights on Bar and Chain Selection

“Match the bar and chain to the task.” Don’t use a long bar and aggressive chain for small cutting jobs.
Use a narrow-kerf bar and chain to reduce cutting resistance and increase fuel efficiency.
Keep the bar groove clean and lubricated. A dirty or dry bar groove can cause the chain to bind and wear prematurely.
Replace the bar and chain when they are worn or damaged.

6. Cutting with Confidence: Strategic Techniques for Efficiency and Safety

Even with a perfectly tuned G660 and a razor-sharp chain, poor cutting techniques can lead to inefficiency, fatigue, and even injury. I’ve learned through trial and error the importance of employing strategic cutting methods to maximize control and minimize risk.

6.1 Felling Techniques

Felling a tree safely and efficiently requires careful planning and execution.

Assess the Tree: Evaluate the tree’s lean, size, and condition. Look for any signs of rot or decay.
Plan the Felling Direction: Choose a felling direction that is safe and allows the tree to fall without damaging property or endangering people.
Clear the Area: Clear away any brush, debris, or obstacles that could interfere with the felling process.
Make the Notch Cut: Cut a notch in the tree on the side facing the desired felling direction. The notch should be about one-third of the tree’s diameter.
Make the Back Cut: Cut the back cut on the opposite side of the tree from the notch cut. Leave a hinge of wood between the back cut and the notch cut.
Fell the Tree: Use wedges or a felling lever to help push the tree over in the desired direction.

6.2 Limbing Techniques

Limbing involves removing branches from a felled tree.

Work from the Base to the Top: Start limbing at the base of the tree and work your way towards the top.
Use a Stable Stance: Maintain a stable stance and keep your feet firmly planted on the ground.
Cut on the Opposite Side of the Limb: Cut on the opposite side of the limb from where you are standing.
Avoid Cutting Overhead: Avoid cutting limbs overhead, as they can fall and injure you.

6.3 Bucking Techniques

Bucking involves cutting a felled tree into smaller sections.

Support the Log: Support the log to prevent it from pinching the chain.
Use a Cutting Guide: Use a cutting guide to ensure that the cuts are straight and accurate.
Cut from the Top Down: Cut from the top down to prevent the log from splitting or splintering.
Avoid Cutting into the Ground: Avoid cutting into the ground, as this can dull the chain.

6.4 Expert Insights on Cutting Techniques

“Always be aware of your surroundings.” Pay attention to the terrain, weather conditions, and other people in the area.
Use the correct personal protective equipment (PPE). This includes a helmet, safety glasses, hearing protection, gloves, and chainsaw chaps.
Take breaks to avoid fatigue. Fatigue can impair your judgment and increase the risk of accidents.
Never cut above shoulder height. Cutting above shoulder height is dangerous and can lead to loss of control.

Conclusion: Mastering the G660: A Lifelong Pursuit

The Stihl G660 is more than just a chainsaw; it’s a tool that embodies power, reliability, and the spirit of hard work. By mastering these five expert tips, you can unlock its full potential and transform your woodcutting endeavors. Remember, chainsaw operation is a skill that requires continuous learning and refinement. Embrace the challenges, respect the power of the machine, and always prioritize safety. As you continue your journey with the G660, you’ll not only become a more efficient woodcutter but also a steward of the land, ensuring the sustainable use of our precious natural resources. Now, go forth and make some sawdust!