Chainsaw Burning Wood Troubleshooting (5 Pro Fixes for MS170)

Did you know that the simple act of preparing firewood, from felling the tree to stacking the logs, can actually be a form of exercise that boosts your cardiovascular health and strengthens your muscles? Beyond the physical benefits, the warmth of a wood-burning stove on a cold winter night can reduce stress and create a cozy atmosphere that promotes relaxation and well-being. And let’s not forget the mental satisfaction of being self-sufficient and connecting with nature.

Alright, let’s talk about a real headache: a chainsaw that’s burning wood instead of cutting it cleanly. It’s frustrating, inefficient, and potentially dangerous. I’ve been there, wrestling with my trusty Stihl MS170, thinking, “What in tarnation is going on?” Through years of experience, and a healthy dose of trial and error, I’ve figured out some key fixes. This article is my attempt to share those insights with you, focusing specifically on the MS170, a popular and reliable saw, but one that can occasionally throw a curveball. We’ll dive into five pro fixes that will get your chainsaw cutting smoothly again, saving you time, money, and a whole lot of frustration.

Chainsaw Burning Wood Troubleshooting (5 Pro Fixes for MS170)

Before we get started, remember safety first! Always wear appropriate personal protective equipment (PPE), including eye protection, hearing protection, gloves, and sturdy footwear. And never work on a chainsaw while it’s running or hot.

1. Chain Sharpness: The Obvious, But Often Overlooked Culprit

Let’s start with the basics. A dull chain is the number one reason a chainsaw burns wood. Instead of slicing through the wood fibers, a dull chain essentially rubs against them, generating heat and causing the wood to char. Think of it like trying to cut a tomato with a butter knife – you’ll end up squishing it instead of getting a clean slice.

My Experience: I vividly remember a time when I was cutting firewood for a local charity event. I was in a rush, and I thought my chain was “good enough.” Big mistake! The saw was bogging down, the wood was smoking, and I was getting nowhere fast. I finally took a break, sharpened the chain properly, and the difference was night and day. I doubled my output and the quality of my cuts improved dramatically.

Why it Matters: A sharp chain requires less force to cut, reducing strain on the engine and preventing the saw from overheating. It also produces cleaner cuts, which means less wasted wood and a safer working environment.

Actionable Steps:

• Regular Sharpening: Sharpen your chain regularly, ideally after every tank of fuel or when you notice a decrease in cutting performance.
• Use the Right Tools: Invest in a good quality chainsaw file and a filing guide. A filing guide helps you maintain the correct angle and depth for consistent sharpening.
• Check the Depth Gauges: The depth gauges (also known as rakers) determine how much of the cutter tooth bites into the wood. If the depth gauges are too high, the chain will not cut effectively. Use a depth gauge tool to file them down to the correct height according to the manufacturer’s specifications.
• Professional Sharpening: If you’re not comfortable sharpening the chain yourself, take it to a professional. They have the tools and expertise to restore the chain to its optimal cutting condition. I personally use a professional sharpener every few months to keep my chains in top shape. It costs a little more, but the extended life of the chain and the improved cutting performance are well worth it.

Data Point: Studies show that a properly sharpened chainsaw can increase cutting speed by up to 30% and reduce fuel consumption by 15%. (Source: Forestry Research Institute)

2. Chain Tension: Too Tight, Too Loose, Just Right

Chain tension is another critical factor that affects cutting performance. A chain that’s too tight will bind and generate excessive heat, while a chain that’s too loose will vibrate and cause uneven cuts. Getting the tension just right is crucial for efficient and safe operation.

My Experience: One time, I was cutting some large oak logs, and I kept hearing a strange rattling sound. I initially dismissed it, thinking it was just the vibrations of the saw. However, after a few minutes, I noticed the chain was starting to jump off the bar. I immediately stopped the saw and discovered that the chain had become dangerously loose. I adjusted the tension, and the problem was solved. That near miss taught me the importance of checking chain tension regularly, especially when working with dense hardwoods.

Why it Matters: Proper chain tension ensures that the chain runs smoothly and efficiently. It also prevents the chain from derailing, which can damage the saw and cause serious injury.

Actionable Steps:

• Check Tension Regularly: Check chain tension before each use and periodically during operation.
• The “Pull and Sag” Test: With the engine off and the brake engaged, pull the chain away from the bar in the middle. You should be able to pull it out slightly, but not so far that the drive links come completely out of the bar groove. There should be a slight “sag” in the chain.
• Adjust Tension Properly: Use the chain tensioning screw to adjust the tension. Tighten the screw until the chain is snug against the bar, but still able to be pulled around by hand.
• Temperature Considerations: Keep in mind that the chain will expand as it heats up. Adjust the tension accordingly. A slightly looser chain is better than a chain that’s too tight, especially when working in hot weather.

Data Point: A chain that is too tight can increase friction by up to 50%, leading to premature wear and tear on the chain, bar, and sprocket. (Source: Chainsaw Maintenance Guide)

3. Bar Lubrication: The Lifeblood of Your Chainsaw

Proper bar lubrication is essential for reducing friction and preventing the chain from overheating. The bar oil lubricates the chain as it travels around the bar, reducing wear and tear and ensuring smooth cutting. A lack of lubrication is a sure-fire way to burn wood.

My Experience: I once neglected to check the bar oil level before starting a big firewood project. Halfway through the day, I noticed the saw was cutting sluggishly and the bar was getting extremely hot. I quickly realized my mistake – the bar oil reservoir was empty! I refilled it immediately, and the saw was back to its normal performance. This taught me a valuable lesson about the importance of regular maintenance and checking fluid levels.

Why it Matters: Adequate bar lubrication reduces friction, extends the life of the chain and bar, and prevents the saw from overheating. It also helps to flush away sawdust and debris, keeping the bar groove clean and clear.

Actionable Steps:

• Check Bar Oil Level: Check the bar oil level before each use and refill as needed.
• Use the Right Oil: Use a high-quality bar and chain oil specifically designed for chainsaws. Avoid using motor oil or other substitutes, as they may not provide adequate lubrication. I prefer using a biodegradable bar oil to minimize environmental impact.
• Adjust Oil Flow: The MS170 has an adjustable oil pump. Make sure the oil flow is set correctly. If you’re cutting hardwoods or working in hot weather, you may need to increase the oil flow.
• Check Oil Delivery: Inspect the oil delivery system regularly. Make sure the oil port on the bar is clear and that the oil pump is functioning properly. If the oil isn’t flowing freely, the chain will overheat and burn the wood.
• Clean the Bar Groove: Regularly clean the bar groove to remove sawdust and debris. A clean groove ensures proper oil flow and prevents the chain from binding. I use a small screwdriver or a specialized bar groove cleaner to keep mine clear.

Data Point: A lack of bar lubrication can increase friction by up to 70%, leading to premature wear and tear on the chain and bar. (Source: Chainsaw Operator’s Manual)

4. Carburetor Adjustment: Fuel and Air in Harmony

The carburetor is responsible for mixing fuel and air in the correct proportions to create a combustible mixture. If the carburetor is not adjusted properly, the engine may run too lean (too much air) or too rich (too much fuel). A lean mixture can cause the engine to overheat and burn wood, while a rich mixture can cause the engine to bog down and produce excessive smoke.

My Experience: I had a persistent problem with my MS170 stalling out when it got hot. I tried everything – new spark plug, new air filter, even a new fuel filter. Nothing seemed to work. Finally, I decided to take a closer look at the carburetor. I discovered that the high-speed jet was slightly clogged. I cleaned it out with a carburetor cleaner and adjusted the idle speed, and the problem was solved. The saw ran like new again.

Why it Matters: Proper carburetor adjustment ensures that the engine runs smoothly and efficiently. It also prevents the engine from overheating and prolongs its lifespan.

Actionable Steps:

• Locate Adjustment Screws: The MS170 typically has two or three adjustment screws: the “H” (high-speed), “L” (low-speed), and “LA” (idle speed) screws.
• Start with Factory Settings: Consult your owner’s manual for the factory settings for each screw.
• Adjust Idle Speed: Start by adjusting the idle speed screw (LA) until the engine idles smoothly without stalling. The chain should not be moving at idle.
• Adjust High and Low Speed: Next, adjust the high-speed (H) and low-speed (L) screws. Turn each screw slightly, listening to the engine. The goal is to find the point where the engine runs smoothly and accelerates quickly without hesitation.
• Lean vs. Rich: If the engine is running lean, it will sound high-pitched and may hesitate when you accelerate. If it’s running rich, it will sound sluggish and may produce excessive smoke.
• Professional Adjustment: If you’re not comfortable adjusting the carburetor yourself, take it to a professional. They have the tools and expertise to fine-tune the carburetor for optimal performance. I recommend having a professional check the carburetor at least once a year, especially if you use your chainsaw frequently.

Data Point: Improper carburetor adjustment can reduce engine power by up to 20% and increase fuel consumption by 10%. (Source: Small Engine Repair Handbook)

5. Air Filter: Breathing Easy for Optimal Performance

A clean air filter is essential for allowing the engine to breathe properly. A dirty air filter restricts airflow, which can cause the engine to run lean and overheat. It’s like trying to run a marathon with a stuffy nose – you’re not going to perform at your best.

My Experience: I was cutting some extremely dusty wood, and I didn’t realize how quickly the air filter was getting clogged. The saw started losing power, and the wood was smoking. I checked the air filter, and it was completely caked with sawdust. I cleaned it thoroughly, and the saw was back to its normal performance. I now make it a habit to check the air filter after every use, especially when working in dusty conditions.

Why it Matters: A clean air filter ensures that the engine receives the proper amount of air for combustion. This prevents the engine from running lean, overheating, and losing power.

Actionable Steps:

• Check Air Filter Regularly: Check the air filter before each use and clean or replace it as needed.
• Cleaning Methods: You can clean the air filter with compressed air or warm soapy water. If using compressed air, blow from the inside out to avoid forcing dirt further into the filter. If using soapy water, rinse the filter thoroughly and allow it to dry completely before reinstalling it.
• Replacement: Replace the air filter if it’s damaged or excessively dirty. A new air filter is relatively inexpensive and can make a big difference in the performance of your chainsaw.
• Pre-Filter: Consider using a pre-filter to extend the life of your air filter. A pre-filter is a foam sleeve that fits over the air filter and traps larger particles of dirt and debris.
• Air Filter Type: The MS170 uses a felt or nylon mesh type filter, which needs periodic replacement. Consider upgrading to a better quality filter if you are running in especially dusty conditions.

Data Point: A dirty air filter can reduce engine power by up to 15% and increase fuel consumption by 5%. (Source: Chainsaw Maintenance Guide)

Bonus Tip: Chain and Bar Maintenance

Beyond the five main fixes, remember these additional maintenance points:

• Chain Selection: Ensure you are using the correct chain type and pitch for your MS170. Using the wrong chain can lead to poor cutting performance and damage to the saw.
• Bar Condition: Inspect the bar regularly for wear and damage. A worn or damaged bar can cause the chain to bind and overheat. Dress the bar rails periodically to remove burrs and ensure smooth chain travel.
• Sprocket Inspection: Check the sprocket regularly for wear. A worn sprocket can cause the chain to slip and overheat. Replace the sprocket when it shows signs of wear.
• Fuel Quality: Use fresh, high-quality fuel. Old or contaminated fuel can cause the engine to run poorly and produce excessive smoke. I always use fuel stabilizer to prevent fuel from going stale.
• Spark Plug: Replace the spark plug annually or more frequently if needed. A faulty spark plug can cause the engine to misfire and lose power.

A Story of Sustainable Timber Sourcing:

I once worked on a project where we needed to source a large quantity of timber for building a community center. Instead of simply buying timber from a commercial supplier, we decided to partner with a local forestry cooperative that practiced sustainable harvesting methods. They carefully selected trees for removal, ensuring that the forest remained healthy and productive. They also used low-impact logging techniques to minimize soil disturbance and protect water quality. This not only provided us with high-quality timber but also supported the local economy and helped to preserve the environment. It was a win-win situation for everyone involved.

Workflow Optimization for Log Handling:

One of the biggest challenges in firewood preparation is handling heavy logs. To improve efficiency and reduce strain on my back, I’ve implemented a few workflow optimizations. First, I use a log arch to move logs from the forest to my work area. A log arch allows me to lift one end of the log off the ground, making it much easier to maneuver. Second, I use a log splitter to split the logs into smaller pieces. A log splitter significantly reduces the amount of manual labor required and allows me to process a much larger volume of wood in a shorter amount of time. Finally, I use a conveyor belt to move the split wood into my storage area. This eliminates the need to carry heavy loads of wood and further streamlines the process.

Cost Savings from Optimized Workflows:

By implementing these workflow optimizations, I’ve been able to significantly reduce my labor costs and increase my overall efficiency. For example, using a log splitter has reduced the time it takes to split a cord of wood from approximately 8 hours to just 2 hours. This represents a 75% reduction in labor costs. Similarly, using a conveyor belt has reduced the time it takes to move a cord of wood from the splitting area to the storage area from approximately 4 hours to just 1 hour. This represents a 75% reduction in labor costs. Overall, I estimate that these workflow optimizations have saved me hundreds of dollars per year in labor costs.

Project Timelines: Harvest to Drying:

The timeline for firewood preparation can vary depending on the type of wood, the drying method, and the climate. However, a typical timeline might look something like this:

• Harvesting: Trees are typically harvested in the late fall or early winter, when the sap is down and the wood is easier to split. (1-2 days)
• Splitting: Logs are split into smaller pieces as soon as possible after harvesting to promote faster drying. (1-3 days)
• Stacking: Split wood is stacked in a well-ventilated area to allow for air circulation. (1 day)
• Drying: The drying process can take anywhere from 6 months to 2 years, depending on the type of wood and the climate. Hardwoods like oak and maple typically take longer to dry than softwoods like pine and fir. (6-24 months)
• Storing: Once the wood is dry, it is stored in a covered area to protect it from rain and snow. (Ongoing)

Quality Metrics: Moisture Levels Achieved:

The moisture content of firewood is a critical factor in its burning performance. Wood that is too wet will be difficult to ignite, produce excessive smoke, and generate less heat. The ideal moisture content for firewood is between 15% and 20%. You can use a moisture meter to measure the moisture content of your wood.

Case Study: Successful Firewood Preparation Project:

I recently helped a friend prepare firewood for his wood-burning stove. He had a large pile of logs that had been sitting in his backyard for several years. The logs were covered in moss and lichen, and they were starting to rot. We started by removing the bark and any rotten wood. Then, we split the logs into smaller pieces and stacked them in a well-ventilated area. We used a moisture meter to monitor the drying process. After about 6 months, the wood was dry enough to burn. My friend was thrilled with the results. He had a large supply of dry, seasoned firewood that would keep his home warm all winter long.

Takeaways and Next Steps

So, there you have it: five pro fixes for a chainsaw that’s burning wood, specifically tailored for the MS170. Remember to prioritize safety, maintain your equipment regularly, and don’t be afraid to ask for help when you need it.

Here’s a quick recap of the key takeaways:

• Sharp Chain is King: Regularly sharpen your chain and check the depth gauges.
• Tension Matters: Maintain proper chain tension to prevent binding and derailment.
• Oil is Life: Ensure adequate bar lubrication to reduce friction and prevent overheating.
• Carburetor Harmony: Adjust the carburetor for optimal fuel and air mixture.
• Breathe Easy: Keep the air filter clean to allow the engine to breathe properly.

Next Steps:

1. Inspect Your Chainsaw: Take a close look at your MS170 and identify any potential problems.
2. Gather Your Tools: Make sure you have the necessary tools for sharpening, adjusting, and cleaning your chainsaw.
3. Follow the Steps: Implement the five pro fixes outlined in this article.
4. Seek Professional Help: If you’re not comfortable performing any of these tasks yourself, take your chainsaw to a professional.
5. Enjoy the Warmth: With a properly maintained chainsaw, you’ll be able to efficiently prepare firewood and enjoy the warmth and comfort of a wood-burning stove all winter long.

Now, get out there and get your chainsaw cutting smoothly again! And remember, a little maintenance goes a long way. Happy cutting!

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