MS251 Bar Guide (5 Pro Tips For Faster Firewood Cutting)

Would you rather spend all day wrestling with a dull chainsaw, barely making a dent in your woodpile, or breeze through your firewood prep, leaving you with more time to relax and enjoy a warm fire? If you’re like me, you’ll choose the latter every time. That’s why I’m excited to share my top 5 pro tips specifically tailored for getting the most out of your Stihl MS251 chainsaw when cutting firewood. I’ve spent countless hours in the woods, learning these lessons the hard way. Now, I’m here to pass them on to you, so you can cut faster, safer, and more efficiently.

MS251 Bar Guide: 5 Pro Tips for Faster Firewood Cutting

The Stihl MS251 is a fantastic saw, a real workhorse for the average homeowner and even some small-scale firewood operations. It’s lightweight enough for extended use, yet powerful enough to tackle a decent range of wood types and sizes. But even the best tool needs the right technique to truly shine. These tips are designed to maximize the MS251’s potential, turning you into a firewood-cutting machine.

1. Mastering Chain Sharpness: The Key to Efficient Cutting

Let’s be honest, a dull chain is the enemy of progress. It doesn’t matter how powerful your saw is; if the chain is blunt, you’re just wasting time and energy. I remember one particularly frustrating day when I was cutting some seasoned oak. My saw was practically screaming, and the wood was just smoking. Turns out, I’d hit a rock earlier and completely dulled the chain without realizing it. I spent the next hour struggling before finally stopping to sharpen it. The difference was night and day!

Think of your chainsaw chain like the teeth of a saw. Sharp teeth bite into the wood, creating clean, efficient cuts. Dull teeth just scrape and tear. The sharpness of your chain directly impacts your cutting speed, fuel consumption, and even the lifespan of your saw.

Why is chain sharpness so critical?

Reduced Cutting Time: A sharp chain slices through wood effortlessly, significantly reducing the time it takes to cut each log.
Improved Fuel Efficiency: A sharp chain requires less power to cut, resulting in lower fuel consumption.
Reduced Strain on the Saw: A dull chain forces the saw to work harder, increasing wear and tear on the engine and other components.
Safer Operation: A sharp chain is less likely to kickback, reducing the risk of injury.

How to Keep Your Chain Razor Sharp:

Regular Sharpening: Don’t wait until your chain is noticeably dull. Sharpen it after every few tanks of gas, or whenever you notice a decrease in cutting performance.
Proper Sharpening Tools: Invest in quality sharpening tools, such as a chainsaw file, a filing guide, and a depth gauge tool. I personally prefer using a chainsaw sharpener, as it gives more consistent and accurate results.
Correct Sharpening Angle and Depth: Follow the manufacturer’s instructions for the correct sharpening angle and depth for your specific chain type. The Stihl chains usually have markings that show the correct angle.
Maintain Depth Gauges: Check and adjust the depth gauges (also known as rakers) regularly. These control how much wood each tooth bites into. If they’re too high, the chain won’t cut effectively. If they’re too low, the saw will be aggressive and prone to kickback.
Clean Your Chain Regularly: Sawdust and pitch can build up on the chain, reducing its cutting efficiency. Clean your chain regularly with a brush and solvent.
Avoid Hitting Obstacles: Be mindful of rocks, dirt, and metal objects that can damage your chain.

Data Point: Studies have shown that a properly sharpened chainsaw can cut up to 30% faster and use up to 20% less fuel compared to a dull chain.

Unique Insight: I’ve found that using a permanent marker to mark the starting point of my sharpening helps me keep track of which teeth I’ve sharpened. This ensures I don’t miss any and maintain a consistent sharpness across the entire chain.

2. Bar and Chain Selection: Matching the Right Tool to the Task

The MS251 typically comes with a 16-inch or 18-inch bar. While these are versatile sizes, understanding the relationship between bar length, chain type, and wood diameter is crucial for optimal performance. I once tried to fell a large oak tree with the standard 16-inch bar. It was a struggle, to say the least, and I ended up having to make multiple cuts from different angles. Not only was it inefficient, but it was also potentially dangerous.

Choosing the right bar and chain isn’t just about convenience; it’s about safety and efficiency. A bar that’s too short will limit your cutting capacity, while a bar that’s too long can make the saw unwieldy and increase the risk of kickback.

Bar Length Considerations:

Wood Diameter: Choose a bar length that’s slightly longer than the diameter of the wood you’ll be cutting. This allows you to make through cuts without having to reposition the saw.
Saw Power: Match the bar length to the power of your saw. The MS251 is well-suited for bars up to 18 inches, but using a longer bar may bog down the engine.
Maneuverability: Consider the maneuverability of the saw with different bar lengths. A shorter bar is easier to handle in tight spaces, while a longer bar provides greater reach.

Chain Type Considerations:

Chain Pitch: The pitch of the chain refers to the distance between the rivets. The MS251 typically uses a 0.325-inch pitch chain. Using the correct pitch is crucial for proper chain engagement with the sprocket and bar.
Chain Gauge: The gauge of the chain refers to the thickness of the drive links. The MS251 typically uses a 0.063-inch gauge chain. Using the correct gauge ensures the chain fits properly in the bar groove.
Chain Style: There are different chain styles available, each designed for specific cutting applications.
- Full Chisel Chains: These chains have square-cornered teeth that are very aggressive and cut quickly. However, they are also more prone to dulling and kickback.
- Semi-Chisel Chains: These chains have rounded-cornered teeth that are less aggressive but more durable and less prone to kickback.
- Low-Kickback Chains: These chains have special features that reduce the risk of kickback, making them a safer option for inexperienced users.

Data Point: Using the correct bar and chain combination can increase cutting efficiency by up to 15% and reduce the risk of kickback by up to 25%.

Unique Insight: I often switch between a full-chisel chain for cutting clean, seasoned wood and a semi-chisel chain for cutting dirty or knotty wood. This allows me to maintain optimal cutting performance in different conditions. Also, I find that Oregon chain is a good alternative to Stihl brand chain.

3. Proper Cutting Techniques: Maximizing Efficiency and Safety

Even with a sharp chain and the right bar, improper cutting techniques can lead to slow cutting, increased fuel consumption, and even dangerous situations. I once saw a guy trying to buck a large log by cutting straight down from the top. The saw got pinched, and he nearly lost control. Fortunately, he wasn’t injured, but it was a close call.

Mastering proper cutting techniques is essential for safe and efficient firewood cutting. This involves understanding the principles of wood tension and compression, as well as using the correct cutting methods for different situations.

Key Cutting Techniques:

Bucking: Bucking refers to cutting a log into shorter lengths.
- Cutting on the Ground: When bucking a log on the ground, support it on both sides of the cut. This prevents the log from pinching the saw. If the log is supported in the middle, cut halfway through from the top, then roll the log over and finish the cut from the bottom.
- Cutting on a Sawbuck: A sawbuck provides a stable platform for bucking logs. Place the log securely in the sawbuck and make clean, straight cuts.
Felling: Felling refers to cutting down a tree.
- Planning the Fall: Before felling a tree, assess the surrounding area for hazards, such as power lines, buildings, and people. Plan the direction of the fall and clear a path for escape.
- Making the Notch: Cut a notch on the side of the tree facing the direction you want it to fall. The notch should be about one-third of the tree’s diameter.
- Making the Back Cut: Make a back cut on the opposite side of the tree, slightly above the notch. Leave a hinge of wood between the back cut and the notch to control the direction of the fall.
- Wedges: Use wedges to help guide the tree’s fall and prevent it from pinching the saw.
Limbing: Limbing refers to removing the branches from a felled tree.
- Cutting from the Top: When limbing, cut the branches from the top of the tree, working your way down. This prevents the saw from getting pinched.
- Supporting the Branches: Support the branches as you cut them to prevent them from falling on you.

Data Point: Using proper cutting techniques can reduce cutting time by up to 20% and reduce the risk of accidents by up to 30%.

Unique Insight: I always try to anticipate how the wood will react when I’m cutting it. This helps me avoid pinching the saw and maintain control. For example, when cutting a log that’s under tension, I’ll make a relief cut on the compression side first to release the tension.

4. Maintaining Your MS251: Prolonging Its Lifespan and Performance

Like any machine, the MS251 requires regular maintenance to keep it running smoothly and efficiently. I’ve seen countless saws die prematurely due to neglect. I remember a friend who never bothered to clean the air filter on his saw. Eventually, the engine seized up, and he had to buy a new one. A little bit of preventative maintenance could have saved him a lot of money.

Proper maintenance not only prolongs the lifespan of your saw but also ensures optimal performance and safety. This includes regular cleaning, lubrication, and inspection of key components.

Essential Maintenance Tasks:

Cleaning the Air Filter: Clean the air filter regularly to prevent dirt and debris from entering the engine. A clogged air filter can reduce engine power and increase fuel consumption.
Cleaning the Spark Plug: Clean the spark plug regularly to ensure proper ignition. A fouled spark plug can cause the engine to misfire or fail to start.
Checking the Fuel Filter: Check the fuel filter regularly to prevent dirt and debris from entering the carburetor. A clogged fuel filter can cause the engine to run poorly.
Cleaning the Cooling Fins: Clean the cooling fins on the engine regularly to prevent overheating. Overheating can damage the engine.
Lubricating the Bar and Chain: Lubricate the bar and chain regularly with chainsaw bar oil. This reduces friction and wear and tear.
Checking the Chain Tension: Check the chain tension regularly and adjust as needed. A loose chain can derail and cause damage.
Inspecting the Sprocket: Inspect the sprocket regularly for wear and tear. A worn sprocket can damage the chain.
Storing the Saw Properly: Store the saw in a clean, dry place when not in use. Drain the fuel tank before storing the saw for extended periods.

Data Point: Regular maintenance can extend the lifespan of your chainsaw by up to 50% and improve fuel efficiency by up to 10%.

Unique Insight: I keep a logbook of all the maintenance I perform on my saw. This helps me track when I last performed each task and ensures that I don’t miss anything. I also find that using a fuel stabilizer in the gasoline extends the shelf life of the fuel and prevents it from gumming up the carburetor.

5. Safety First: Protecting Yourself and Others

Chainsaw operation is inherently dangerous. I’ve had a few close calls myself, including a time when a branch kicked back and nearly hit me in the face. It was a sobering reminder of the importance of safety precautions.

Prioritizing safety is paramount when operating a chainsaw. This involves wearing appropriate personal protective equipment (PPE), following safe operating procedures, and being aware of potential hazards.

Essential Safety Precautions:

Wear Appropriate PPE: Always wear a helmet, eye protection, hearing protection, gloves, chainsaw chaps, and steel-toed boots when operating a chainsaw.
Read the Owner’s Manual: Familiarize yourself with the owner’s manual and follow all safety instructions.
Inspect the Saw Before Use: Inspect the saw before each use to ensure that all components are in good working order.
Start the Saw Safely: Start the saw on the ground, with the chain brake engaged.
Maintain a Firm Grip: Maintain a firm grip on the saw with both hands.
Keep a Safe Distance: Keep a safe distance from other people when operating the saw.
Be Aware of Kickback: Be aware of the risk of kickback and take steps to prevent it. Kickback occurs when the tip of the bar contacts a solid object or is pinched.
Avoid Cutting Overhead: Avoid cutting overhead, as this can be dangerous.
Never Cut Above Shoulder Height: Never cut above shoulder height, as this reduces control and increases the risk of injury.
Take Breaks: Take frequent breaks to avoid fatigue. Fatigue can impair judgment and increase the risk of accidents.
Never Operate the Saw Under the Influence: Never operate the saw under the influence of alcohol or drugs.

Data Point: Wearing appropriate PPE can reduce the risk of chainsaw injuries by up to 80%.

Unique Insight: I always carry a first-aid kit with me when I’m working in the woods. It’s also a good idea to let someone know where you’re going and when you expect to be back. Cell phone service can be spotty in remote areas, so consider investing in a satellite communicator. Also, I always have a whistle attached to my gear. It’s a simple tool that can be a lifesaver in an emergency.

Case Study: Optimizing Firewood Production for a Small-Scale Operation

I recently consulted with a small-scale firewood producer who was struggling to meet demand. They were using an MS251 and were spending long hours in the woods with relatively low output. After observing their operation, I identified several areas for improvement:

Chain Sharpness: Their chain was dull and poorly maintained. I recommended a regular sharpening schedule and provided training on proper sharpening techniques.
Cutting Techniques: They were using inefficient cutting techniques, such as cutting straight down from the top of logs. I demonstrated proper bucking techniques and emphasized the importance of supporting the log on both sides of the cut.
Ergonomics: They were working in awkward positions, which led to fatigue and increased the risk of injury. I recommended using a sawbuck to improve ergonomics and reduce strain on their backs.

Results:

After implementing these changes, the firewood producer saw a significant improvement in their output and efficiency. They were able to cut more firewood in less time, with less fatigue and a reduced risk of injury. They also reported a decrease in fuel consumption.

Key Components of the Case Study:

Equipment Used: Stihl MS251 chainsaw, chainsaw file, sawbuck, personal protective equipment.
Wood Types: Mixed hardwoods, including oak, maple, and birch.
Safety Considerations: Proper PPE, safe cutting techniques, awareness of potential hazards.

Conclusion:

By implementing these 5 pro tips, you can unlock the full potential of your Stihl MS251 and transform your firewood cutting experience. Remember, a sharp chain, the right bar and chain selection, proper cutting techniques, regular maintenance, and a strong focus on safety are the keys to success. Get out there, put these tips into practice, and enjoy the satisfaction of efficiently and safely preparing your firewood for a cozy winter. Now you’ll be able to tackle that woodpile like a pro!

MS251 Bar Guide (5 Pro Tips for Faster Firewood Cutting)