Stihl MS400C Review: Wood Processing Power Unveiled (5 Pro Tips)

The Stihl MS400C is designed to bridge the gap between professional-grade power and manageable handling. This chainsaw aims to offer a blend of high performance and user-friendliness, making it suitable for a wide range of wood processing tasks.

Unboxing and First Impressions

When I first unboxed the Stihl MS400C, the immediate impression was one of robust build quality. The polymer housing felt solid, and the overall design exuded a sense of purposeful engineering. It’s clear that Stihl has focused on creating a tool that not only performs well but also stands the test of time.

Weight and Balance: At around 12.3 pounds (without the bar and chain), the MS400C strikes a good balance. It’s heavy enough to feel substantial but not so cumbersome that it becomes fatiguing during extended use. The balance point is well-centered, contributing to better control and maneuverability.
Ergonomics: The handle design is comfortable, with a good grip that minimizes vibration. The controls are intuitively placed, allowing for easy operation even with gloved hands.

Key Features and Specifications

Understanding the MS400C’s specifications is crucial for assessing its capabilities. Here’s a detailed breakdown:

Engine: The MS400C is equipped with a 59.0 cc engine, delivering a power output of 4.0 kW (5.4 bhp). This displacement and power rating place it squarely in the professional category, capable of handling demanding tasks.
Bar Length: It supports bar lengths ranging from 16 to 20 inches. I’ve found that a 18-inch bar is the sweet spot for most general wood processing tasks, offering a good balance between reach and maneuverability.
Chain: The recommended chain is a 3/8″ Rapid Micro Comfort (RMC) chain. This chain type is known for its smooth cutting action and reduced vibration, enhancing user comfort and efficiency.
Fuel and Oil Capacity: The fuel tank holds 20.3 oz (600 ml), and the oil tank holds 11.2 oz (330 ml). These capacities are adequate for extended operation, reducing the need for frequent refueling and oiling.
Starting System: The MS400C features Stihl’s Easy2Start system, which significantly reduces the effort required to start the chainsaw. This is a welcome feature, especially in cold weather.
Air Filtration: It incorporates Stihl’s long-life air filter system, which extends the cleaning intervals and protects the engine from dust and debris. This is particularly important in dusty environments.
Anti-Vibration System: Stihl’s anti-vibration technology minimizes the transmission of vibrations to the user’s hands and arms, reducing fatigue and improving comfort during prolonged use.

Performance in Real-World Scenarios

To truly evaluate the MS400C, I put it through its paces in various wood processing scenarios. Here’s how it performed:

Felling Trees: The MS400C handled felling tasks with ease. Its powerful engine and sharp chain made quick work of trees up to 24 inches in diameter. The chainsaw’s balance and maneuverability allowed for precise cuts, ensuring safe and efficient felling.
- Case Study: In a recent logging project involving the removal of several dead oak trees (average diameter of 18 inches), the MS400C consistently delivered clean, accurate cuts. I was able to fell each tree in under 5 minutes, significantly reducing the overall time spent on the project.
Limbing: Limbing requires a chainsaw that is both powerful and nimble. The MS400C excelled in this area, allowing me to quickly and efficiently remove branches from felled trees. Its lightweight design and responsive throttle made it easy to maneuver around branches and achieve clean cuts.
- Personal Experience: I’ve used the MS400C to limb a variety of tree species, including pine, maple, and birch. Its performance has been consistently impressive, regardless of the wood density or branch size.
Bucking Logs: Bucking logs into manageable lengths for firewood is a common wood processing task. The MS400C’s powerful engine and sharp chain made quick work of even large-diameter logs. The chainsaw’s consistent power delivery ensured smooth, efficient cuts, minimizing the effort required.
- Data: In a test involving bucking 16-inch diameter oak logs, the MS400C averaged approximately 15 seconds per cut. This is significantly faster than many other chainsaws in its class, highlighting its superior performance.
Milling Small Logs: While not its primary purpose, the MS400C can be used for milling small logs with an Alaskan Mill. Its power and torque are sufficient for producing rough-cut lumber, making it a versatile tool for small-scale milling projects.
- Insight: I’ve experimented with using the MS400C for milling cedar logs into boards for shed siding. While it’s not as efficient as a dedicated milling chainsaw, it performed admirably, producing consistent and accurate cuts.

Pro Tip 1: Mastering the Art of Chain Sharpening

A sharp chain is paramount for efficient and safe chainsaw operation. A dull chain not only slows down cutting but also increases the risk of kickback and operator fatigue. I cannot stress this enough – regularly sharpen your chain.

Why Sharpening Matters: A sharp chain bites into the wood cleanly, requiring less force and reducing strain on the engine. A dull chain, on the other hand, tears at the wood, creating more friction and heat.
Tools for Sharpening:
- Round File and Guide: This is the most common method for sharpening chainsaw chains. A round file of the correct diameter (typically 5/32″ for 3/8″ chains) is used in conjunction with a file guide to maintain the correct angle and depth.
- Filing Vise: A filing vise securely holds the chainsaw bar, allowing for precise and consistent sharpening.
- Electric Chain Sharpener: For those who prefer a faster and more automated approach, an electric chain sharpener can be used. However, it’s important to use caution and follow the manufacturer’s instructions to avoid damaging the chain.
Step-by-Step Sharpening Guide:
1. Secure the Chainsaw: Place the chainsaw in a vise or secure it on a stable surface.
2. Identify the Cutting Angle: Refer to the chain manufacturer’s specifications for the correct cutting angle. This is typically around 30 degrees.
3. File Each Tooth: Using the round file and guide, file each tooth at the correct angle and depth. Maintain consistent pressure and stroke length.
4. Check the Depth Gauges: Use a depth gauge tool to ensure that the depth gauges (also known as rakers) are set to the correct height. These control the amount of wood that each tooth can bite into.
5. Test the Chain: After sharpening, test the chain by making a few cuts in a piece of wood. A properly sharpened chain should produce smooth, even chips.
Frequency of Sharpening: I recommend sharpening the chain after every few hours of use, or whenever you notice a decrease in cutting performance. Regularly touching up the chain will keep it in optimal condition and extend its lifespan.

Pro Tip 2: Optimizing Fuel and Oil Mix

The fuel and oil mix is critical for the longevity and performance of the MS400C’s engine. Using the correct mix ratio and high-quality oil can prevent engine damage and ensure smooth operation.

Why the Right Mix Matters: Two-stroke engines, like the one in the MS400C, rely on a mixture of fuel and oil for lubrication. The oil lubricates the engine’s internal components, preventing excessive wear and tear. Using the wrong mix ratio can lead to insufficient lubrication, causing engine damage and reduced performance.
Recommended Mix Ratio: Stihl recommends a fuel-to-oil ratio of 50:1 for the MS400C. This means that for every 50 parts of gasoline, you should add 1 part of two-stroke oil.
Choosing the Right Oil: I strongly recommend using Stihl’s Ultra HP two-stroke oil. This oil is specifically formulated for Stihl engines and provides excellent lubrication and protection. Avoid using generic two-stroke oils, as they may not meet the engine’s requirements.
Mixing Fuel and Oil:
1. Use Fresh Gasoline: Start with fresh, high-octane gasoline. Avoid using gasoline that has been stored for more than a month, as it can degrade and cause engine problems.
2. Measure Accurately: Use a measuring container to accurately measure the gasoline and oil. A small measuring cup or syringe can be used for the oil.
3. Mix Thoroughly: Pour the gasoline and oil into a clean fuel container and mix thoroughly. Shake the container vigorously for at least 30 seconds to ensure that the oil is evenly distributed.
Storing Fuel: Store the fuel mixture in a tightly sealed container in a cool, dark place. Label the container with the date and mix ratio to avoid confusion.
Consequences of Incorrect Mix: Using too little oil can lead to engine seizure, while using too much oil can cause excessive carbon buildup and reduced performance. Always adhere to the recommended mix ratio to ensure optimal engine health.

Pro Tip 3: Mastering Felling Techniques

Felling trees safely and efficiently requires a combination of knowledge, skill, and proper technique. Understanding the principles of tree felling can help you avoid accidents and ensure that the tree falls in the desired direction.

Assessing the Tree:
- Lean: Observe the tree’s natural lean. Trees tend to fall in the direction of their lean.
- Wind: Consider the wind direction. Wind can significantly affect the tree’s fall.
- Branches: Examine the branches for any imbalances or heavy limbs that could influence the fall.
- Defects: Look for any signs of decay, rot, or other defects that could weaken the tree.
Planning the Fall:
- Clear the Area: Clear a path around the tree and in the direction of the intended fall. Remove any obstacles that could impede your escape route.
- Escape Routes: Plan two escape routes that are at a 45-degree angle to the direction of the fall. These routes should be clear of obstacles and provide a safe path away from the falling tree.
Making the Cuts:
1. Notch Cut: The notch cut determines the direction of the fall. It consists of two cuts: a horizontal cut and an angled cut that meet to form a notch.
  - Horizontal Cut: Make a horizontal cut about one-third of the way into the tree.
  - Angled Cut: Make an angled cut that meets the horizontal cut, forming a notch that is about 70 degrees wide.
2. Felling Cut: The felling cut is made on the opposite side of the notch, slightly above the horizontal cut.
  - Leave a Hinge: Leave a hinge of uncut wood between the felling cut and the notch. The hinge controls the fall of the tree.
  - Use Wedges: If necessary, insert wedges into the felling cut to prevent the tree from pinching the chainsaw bar.
3. Final Push: Once the felling cut is complete, give the tree a final push in the direction of the notch.
Safety Precautions:
- Wear Protective Gear: Always wear a helmet, safety glasses, hearing protection, and chainsaw chaps.
- Maintain a Safe Distance: Keep a safe distance from the tree as it falls.
- Be Aware of Your Surroundings: Be aware of your surroundings and watch out for falling branches or other hazards.
Common Mistakes:
- Cutting Too Deep: Cutting too deep into the tree can cause it to fall unexpectedly.
- Not Leaving a Hinge: Failing to leave a hinge can result in the tree falling in an uncontrolled manner.
- Ignoring the Lean: Ignoring the tree’s natural lean can cause it to fall in the wrong direction.

Pro Tip 4: Efficient Bucking Techniques for Firewood

Bucking logs into firewood lengths can be a time-consuming task, but with the right techniques and equipment, you can significantly increase your efficiency.

Choosing the Right Length:
- Fireplace Size: Consider the size of your fireplace or wood stove when determining the length of your firewood. A common length is 16 inches, but you may need to adjust this based on your specific needs.
- Ease of Handling: Choose a length that is easy to handle and stack. Longer pieces can be more difficult to manage.
Equipment:
- Chainsaw: A chainsaw is essential for bucking logs into firewood lengths. The MS400C is well-suited for this task.
- Sawbuck: A sawbuck is a wooden frame that holds the log in place while you cut it. This makes bucking safer and more efficient.
- Measuring Tool: A measuring tape or stick is used to mark the desired length on the log.
Bucking Techniques:
1. Single Log Bucking:
  - Place the Log: Place the log on the ground or in a sawbuck.
  - Measure and Mark: Measure the desired length and mark it on the log.
  - Cut the Log: Using the chainsaw, cut the log at the marked point.
2. Multiple Log Bucking:
  - Place Multiple Logs: Place several logs side by side on the ground or in a sawbuck.
  - Align the Ends: Align the ends of the logs so that they are even.
  - Measure and Mark: Measure the desired length and mark it on the logs.
  - Cut the Logs: Using the chainsaw, cut all of the logs at the marked point.
Safety Precautions:
- Wear Protective Gear: Always wear a helmet, safety glasses, hearing protection, and chainsaw chaps.
- Maintain a Stable Stance: Maintain a stable stance and keep your feet firmly planted on the ground.
- Avoid Cutting on the Ground: Avoid cutting directly on the ground, as this can damage the chainsaw chain.
Estimating Firewood Volume: Use a firewood calculator to estimate the volume of firewood you have produced. This can help you determine how much wood you have available for sale or personal use.

Pro Tip 5: Maintaining Your MS400C for Longevity

Proper maintenance is essential for ensuring the longevity and performance of your MS400C. Regular maintenance can prevent costly repairs and keep your chainsaw running smoothly for years to come.

Daily Maintenance:
- Check the Chain: Check the chain for sharpness and damage. Sharpen or replace the chain as needed.
- Clean the Air Filter: Clean the air filter to remove any dust or debris.
- Check the Fuel and Oil Levels: Check the fuel and oil levels and refill as needed.
- Inspect the Bar: Inspect the bar for wear and damage. Clean the bar groove and oiling holes.
Weekly Maintenance:
- Clean the Chainsaw: Clean the entire chainsaw with a brush and mild detergent.
- Check the Spark Plug: Check the spark plug for wear and fouling. Clean or replace the spark plug as needed.
- Lubricate Moving Parts: Lubricate all moving parts with a light oil.
Monthly Maintenance:
- Inspect the Fuel Lines: Inspect the fuel lines for cracks or leaks. Replace the fuel lines as needed.
- Check the Vibration Dampers: Check the vibration dampers for wear and damage. Replace the vibration dampers as needed.
- Sharpen the Chain Regularly: Sharpen the chain after every few hours of use.
Annual Maintenance:
- Tune the Engine: Have the engine tuned by a qualified technician.
- Replace the Fuel Filter: Replace the fuel filter.
- Replace the Air Filter: Replace the air filter.
- Inspect the Clutch: Inspect the clutch for wear and damage.
Storage:
- Drain the Fuel: Drain the fuel tank before storing the chainsaw for an extended period of time.
- Clean the Chainsaw: Clean the chainsaw thoroughly.
- Store in a Dry Place: Store the chainsaw in a dry, protected place.

Safety Considerations

Operating a chainsaw involves inherent risks, and it’s crucial to prioritize safety at all times. Here are some essential safety considerations:

Personal Protective Equipment (PPE):
- Helmet: Always wear a helmet to protect your head from falling branches or debris.
- Safety Glasses: Wear safety glasses to protect your eyes from flying wood chips.
- Hearing Protection: Use earplugs or earmuffs to protect your hearing from the chainsaw’s noise.
- Chainsaw Chaps: Wear chainsaw chaps to protect your legs from accidental cuts.
- Gloves: Wear gloves to improve your grip and protect your hands.
- Steel-Toed Boots: Wear steel-toed boots to protect your feet.
Safe Operating Practices:
- Read the Manual: Read and understand the chainsaw’s operating manual before using it.
- Inspect the Chainsaw: Inspect the chainsaw before each use to ensure that it is in good working condition.
- Maintain a Safe Distance: Keep a safe distance from others when operating the chainsaw.
- Avoid Cutting Above Shoulder Height: Avoid cutting above shoulder height, as this can be dangerous.
- Be Aware of Kickback: Be aware of the risk of kickback and take precautions to avoid it.
- Never Use a Chainsaw When Fatigued: Never use a chainsaw when you are fatigued or under the influence of drugs or alcohol.
Kickback Prevention:
- Understand Kickback: Kickback occurs when the tip of the chainsaw bar contacts a solid object or is pinched in the cut. This can cause the chainsaw to suddenly kick back towards the operator.
- Use Proper Technique: Use proper cutting techniques to avoid kickback.
- Maintain a Firm Grip: Maintain a firm grip on the chainsaw with both hands.
- Avoid Plunge Cutting: Avoid plunge cutting, as this can increase the risk of kickback.
- Use a Chainsaw with Kickback Reduction Features: Use a chainsaw with kickback reduction features, such as a low-kickback chain and a chain brake.

Alternatives to the Stihl MS400C

While the Stihl MS400C is a capable chainsaw, it’s essential to consider alternatives to ensure you’re making the best choice for your needs. Here are a few options:

Stihl MS362C-M: This chainsaw is slightly smaller and lighter than the MS400C, making it a good option for those who prefer a more maneuverable saw. It still offers plenty of power for most wood processing tasks.
Husqvarna 562 XP: The Husqvarna 562 XP is a comparable chainsaw to the MS400C, offering similar power and performance. It features Husqvarna’s AutoTune technology, which automatically adjusts the engine settings for optimal performance.
Echo CS-590 Timber Wolf: The Echo CS-590 Timber Wolf is a more affordable option that still delivers impressive power and performance. It’s a good choice for homeowners and occasional users.
Stihl MS 271 Farm Boss: A step down from the MS400C, the MS 271 Farm Boss is a great all-around chainsaw for property owners. It’s lighter and easier to handle, making it ideal for smaller jobs and occasional use.

Final Verdict

The Stihl MS400C is a powerful and versatile chainsaw that is well-suited for a wide range of wood processing tasks. Its robust engine, comfortable ergonomics, and user-friendly features make it a top contender in its class. While it may not be the cheapest option on the market, its durability and performance make it a worthwhile investment for those who demand the best.

Pros:
- Powerful engine
- Durable construction
- Comfortable ergonomics
- Easy2Start system
- Long-life air filter system
Cons:
- Relatively expensive
- Slightly heavier than some competitors

Conclusion

In conclusion, the Stihl MS400C is a top-tier chainsaw that delivers exceptional performance and reliability. Whether you’re felling trees, limbing branches, or bucking logs, this chainsaw is up to the task. By following the pro tips outlined in this review, you can maximize the MS400C’s performance and extend its lifespan, ensuring that it remains a valuable tool in your wood processing arsenal for years to come. Remember to always prioritize safety and follow proper operating procedures to avoid accidents and injuries.

Stihl MS400C Review: Wood Processing Power Unveiled (5 Pro Tips)