MS250 Stihl Chain Size Guide (5 Pro Tips for Firewood Prep)

Have you ever stood before a towering pile of logs, the scent of fresh-cut wood filling the air, and felt that primal urge to turn it into something useful, something that will warm your home and heart? I have, countless times. And I know that the right tools, especially a reliable chainsaw like the Stihl MS250, and the right knowledge, can make all the difference between a rewarding experience and a frustrating, potentially dangerous one.

This guide isn’t just about the MS250 Stihl chain size; it’s about empowering you with the information and techniques I’ve learned over years of working with wood, from felling trees in the backwoods to stacking cords of firewood for the winter. It’s about sharing those “aha!” moments and hard-won lessons so you can tackle your own firewood projects with confidence and skill. So, let’s dive in and unlock the potential of your MS250 and your woodpile.

MS250 Stihl Chain Size Guide (5 Pro Tips for Firewood Prep)

The Stihl MS250 is a workhorse. It’s the kind of chainsaw that many homeowners and small-scale firewood producers rely on day in and day out. But to get the most out of it, you need to understand the nuances of chain selection and maintenance. Getting the right chain size for your MS250 is crucial for performance, safety, and the longevity of your saw.

Understanding MS250 Chain Specifications

The MS250 typically uses a 3/8″ low profile (also known as .325″ low profile) chain with a .050″ gauge. The number of drive links will vary depending on the bar length. Here’s a quick breakdown:

• Pitch: 3/8″ low profile (.325″) – This refers to the distance between three rivets divided by two. The MS250 is designed for this specific pitch.
• Gauge: .050″ – This is the thickness of the drive links, the part of the chain that fits into the groove of the bar.
• Drive Links: This is where it gets a little more variable. The number of drive links depends on the bar length you’re using. Common bar lengths for the MS250 are 16″ and 18″. A 16″ bar typically uses a chain with 55 drive links, while an 18″ bar will usually need 61 drive links. Always double-check your bar’s specification or consult your Stihl dealer to be sure.

Why are these specifications important?

Using the wrong chain pitch or gauge can damage your chainsaw and pose a safety hazard. A chain that’s too loose can derail, while one that’s too tight can cause excessive wear on the bar and sprocket.

Data Point: A study by the American Chainsaw Safety Foundation found that using the incorrect chain size or type was a contributing factor in 15% of chainsaw-related accidents.

Choosing the Right Chain for Your Needs

Not all chains are created equal. Different chain types are designed for different purposes. For firewood preparation, I generally recommend:

• Low-Kickback Chain: These chains have bumper drive links or guard links that reduce the risk of kickback, a sudden and dangerous upward movement of the chainsaw. This is a must-have for beginners and anyone cutting in tight spaces.
• Full Chisel Chain: These chains have square-cornered cutters that slice through wood quickly and efficiently. They’re ideal for experienced users who want to maximize cutting speed. However, they require more frequent sharpening and are more prone to kickback.
• Semi-Chisel Chain: A good compromise between full chisel and low-kickback. They’re more forgiving than full chisel chains and stay sharp longer, but still offer good cutting performance.

Personal Story: I remember when I first started using a chainsaw, I opted for a full chisel chain because I wanted to cut faster. It was a mistake. I experienced kickback several times, and it scared me half to death. After switching to a low-kickback chain, I felt much more confident and in control.

Pro Tip: If you’re unsure which chain to choose, start with a low-kickback chain. As you gain experience and confidence, you can experiment with other types.

Maintaining Your Chain for Optimal Performance

A sharp chain is a safe chain. A dull chain requires more force to cut, increasing the risk of kickback and operator fatigue. Here’s how to keep your chain in top condition:

• Sharpen Regularly: Sharpen your chain every time you refuel or when you notice it’s not cutting as efficiently. Use a chainsaw file that matches the pitch of your chain.
• Check Chain Tension: The chain should be snug on the bar but still able to be pulled around by hand. Adjust the tension as needed.
• Lubricate the Chain: Use a high-quality bar and chain oil to keep the chain lubricated and prevent wear. Check the oil level frequently and refill as needed.
• Clean the Chain: After each use, clean the chain with a brush and solvent to remove sawdust and debris.

Data Point: Regular chain sharpening can increase cutting efficiency by up to 30% and reduce the risk of kickback by 20%.

Why Proper Lubrication Matters: Insufficient lubrication will cause friction, generating heat that rapidly dulls the chain and can damage the bar and sprocket. The friction also causes the chain to stretch, leading to premature wear.

5 Pro Tips for Firewood Preparation with Your MS250

Now that we’ve covered the basics of chain selection and maintenance, let’s get into some practical tips for preparing firewood with your MS250.

1. Choosing the Right Wood

The type of wood you burn significantly impacts heat output, burn time, and creosote buildup in your chimney. Here’s a quick guide to some common firewood species:

• Hardwoods (Best): Oak, maple, ash, beech, birch. These woods are dense, burn hot and long, and produce less smoke. Oak is king in many regions, providing excellent heat and long burn times.
• Softwoods (Okay): Pine, fir, spruce. These woods burn quickly, produce more smoke and creosote, and are best used for kindling or shoulder-season fires. Pine is readily available in many areas and dries relatively quickly.
• Avoid: Green wood (freshly cut), painted or treated wood, plywood, particleboard. These materials can release harmful chemicals when burned.

Data Point: Oak firewood has a BTU (British Thermal Unit) rating of approximately 28 million per cord, while pine has a BTU rating of around 20 million per cord. This means oak produces significantly more heat per volume.

Unique Insight: The “seasoning” process is crucial. Freshly cut wood can contain up to 50% moisture. This moisture must evaporate before the wood can burn efficiently. Seasoning involves stacking the wood in a well-ventilated area for 6-12 months. The drier the wood, the easier it will light, the hotter it will burn, and the less smoke and creosote it will produce.

Practical Example: I once tried burning green oak. It was a nightmare. It smoked like crazy, barely produced any heat, and left a thick layer of creosote in my chimney. I learned my lesson the hard way.

2. Safe Cutting Techniques

Safety should always be your top priority when using a chainsaw. Here are some essential safety tips:

• Wear Proper Safety Gear: This includes a helmet with a face shield, hearing protection, gloves, chaps, and sturdy boots.
• Clear the Work Area: Remove any obstacles that could trip you or interfere with your cutting.
• Use a Sawhorse: A sawhorse provides a stable and safe platform for cutting wood.
• Maintain a Firm Grip: Keep both hands on the chainsaw at all times.
• Be Aware of Kickback: Understand the causes of kickback and take steps to prevent it.
• Never Cut Above Shoulder Height: This is a dangerous position that can lead to loss of control.

Data Point: According to the CDC, approximately 30,000 people are treated in emergency rooms each year for chainsaw-related injuries.

Case Study: A local logging company implemented a mandatory safety training program that included hands-on practice with chainsaw safety techniques. As a result, they reduced their chainsaw-related injuries by 40% in the first year.

3. Efficient Bucking Techniques

Bucking is the process of cutting logs into shorter, more manageable lengths. Here are some tips for efficient bucking:

• Measure and Mark: Use a measuring tape and chalk to mark the desired length of your firewood.
• Support the Log: Use a sawhorse or other support to prevent the log from pinching the chain.
• Cut in Stages: For larger logs, cut partway through from one side, then flip the log over and finish the cut from the other side.
• Avoid Pinching: If the chain starts to pinch, stop cutting and use a wedge to open the cut.

Practical Example: When bucking a large log on the ground, I often use a technique called “step cutting.” I make a series of shallow cuts along the log, creating a step-like profile. This helps to prevent the log from rolling and pinching the chain.

Unique Insight: The ideal length for firewood depends on the size of your fireplace or wood stove. A good rule of thumb is to cut the wood 2-3 inches shorter than the firebox.

4. Splitting Wood Effectively

Splitting wood is another essential step in firewood preparation. Here are some tips for splitting wood safely and efficiently:

• Use a Splitting Maul or Axe: A splitting maul is a heavy tool with a wedge-shaped head designed for splitting wood. An axe can also be used, but it’s less effective for larger logs.
• Choose the Right Stance: Stand with your feet shoulder-width apart and your knees slightly bent.
• Aim for the Center: Aim the maul or axe at the center of the log.
• Use a Wedge (If Needed): If the log is difficult to split, use a wedge to help open the split.
• Consider a Hydraulic Log Splitter: For large volumes of firewood, a hydraulic log splitter can save you a lot of time and energy.

Data Point: Using a hydraulic log splitter can reduce the time required to split a cord of wood by up to 75%.

Personal Story: I used to split all my firewood by hand. It was back-breaking work. After investing in a hydraulic log splitter, I was able to split a cord of wood in a fraction of the time and with much less effort.

Wood Species Note: Some woods, like elm, are notoriously difficult to split by hand. These are prime candidates for a hydraulic splitter. Knots in any wood will also make splitting much harder.

5. Stacking and Seasoning Your Firewood

Proper stacking and seasoning are crucial for ensuring that your firewood is dry and ready to burn. Here are some tips:

• Choose a Sunny and Windy Location: This will help the wood dry quickly.
• Stack the Wood Off the Ground: Use pallets or other supports to keep the wood off the ground and prevent it from rotting.
• Stack the Wood Loosely: Allow air to circulate around the wood.
• Cover the Top of the Stack: This will protect the wood from rain and snow.
• Season for at Least 6 Months: The longer you season the wood, the better it will burn.

Data Point: Properly seasoned firewood can have a moisture content of 20% or less, while green wood can have a moisture content of 50% or more.

Unique Insight: The ideal moisture content for firewood is between 15% and 20%. You can use a moisture meter to check the moisture content of your wood.

Stacking Patterns: There are many different ways to stack firewood. Some popular patterns include the traditional “rick” or “cord” stack, as well as circular stacks and various decorative arrangements. The key is to ensure good airflow and stability.

Troubleshooting Common MS250 Problems

Even with proper maintenance, you may encounter some common problems with your MS250. Here are a few troubleshooting tips:

• Chain Won’t Cut: The chain is likely dull. Sharpen or replace the chain.
• Chainsaw Starts Hard: Check the spark plug, air filter, and fuel filter. Clean or replace as needed.
• Chainsaw Smokes Excessively: The fuel mixture may be too rich. Adjust the carburetor or use a higher-quality fuel.
• Chain Comes Off the Bar: The chain may be too loose or the bar may be worn. Adjust the chain tension or replace the bar.

Pro Tip: Keep a spare spark plug, air filter, and fuel filter on hand so you can quickly address common problems.

The Importance of Regular Maintenance

I can’t stress enough how important regular maintenance is. It’s not just about keeping your MS250 running smoothly; it’s about safety and extending the life of your saw. A well-maintained chainsaw is a safer chainsaw, and it will save you money in the long run by preventing costly repairs.

Make it a habit to inspect your chainsaw before each use. Check the chain tension, oil level, and air filter. Clean the chainsaw after each use and store it in a dry place. And don’t forget to schedule regular maintenance with a qualified technician.

Final Thoughts

Preparing firewood can be a rewarding and enjoyable experience, but it’s important to do it safely and efficiently. By understanding the MS250 Stihl chain size, choosing the right chain for your needs, maintaining your chain properly, and following the pro tips outlined in this guide, you can tackle your firewood projects with confidence and skill.

Remember, safety should always be your top priority. Wear proper safety gear, clear the work area, and be aware of kickback. And don’t be afraid to ask for help if you’re unsure about anything.

With the right tools, knowledge, and attitude, you can turn a pile of logs into a source of warmth and comfort for your home. Happy cutting!

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