Stihl MS201 Chainsaw Troubleshooting (3 Expert Fixes)

Stihl MS201 Chainsaw Troubleshooting: 3 Expert Fixes

I’m going to walk you through three of the most common problems I’ve encountered with the Stihl MS201, and the solutions that have consistently worked for me. We’re talking about issues that affect performance, starting, and overall reliability. These fixes are designed to get you back to cutting wood efficiently and safely.

1. The Case of the Stubborn Starter: When Your MS201 Refuses to Roar

Ah, the dreaded pull-start struggle. You yank and yank, your arm aching, and the chainsaw just sits there, silent and uncooperative. This is a common complaint with the MS201, and often stems from a few key culprits.

• The Problem: The engine simply won’t start, even after multiple attempts. It might cough, sputter, or do absolutely nothing.
• The Culprits:
  • Flooding: Too much fuel in the cylinder.
  • Spark Plug Issues: Fouled, wet, or simply worn out.
  • Fuel Problems: Stale fuel, contaminated fuel, or a blocked fuel filter.
  • Compression Issues: Low compression can make starting incredibly difficult.

The Expert Fix: A Three-Pronged Approach

1. De-Flooding the Engine: This is the first thing I try.

   • Step 1: Set the choke lever to the “run” or “off” position (depending on your model).
   • Step 2: Hold the throttle wide open.
   • Step 3: Pull the starter cord rapidly several times (5-10 pulls). This should help clear the excess fuel from the cylinder.
   • Step 4: Try starting the chainsaw normally.

   I remember one particularly cold morning, I flooded my MS201 so badly I thought I’d killed it. De-flooding saved the day, and taught me a valuable lesson about being patient with the choke.

2. Spark Plug Inspection and Replacement: A faulty spark plug can be a real silent killer.

   • Step 1: Disconnect the spark plug wire.
   • Step 2: Use a spark plug wrench to remove the spark plug.
   • Step 3: Inspect the spark plug. Look for:
     • Fouling: Black, oily deposits. This indicates a rich fuel mixture or oil leaking into the cylinder.
     • Wetness: Fuel on the electrode. This indicates flooding or a fuel system problem.
     • Damage: Cracks, chips, or worn electrodes.
   • Step 4: Clean the spark plug with a wire brush if it’s just fouled. Alternatively, and this is my recommendation, just replace it. Spark plugs are cheap insurance. I typically replace mine every 50-75 hours of use, or at the beginning of each cutting season.
   • Step 5: Check the spark plug gap using a feeler gauge. The correct gap for the MS201 is typically around 0.020 inches (0.5 mm), but always consult your owner’s manual.
   • Step 6: Install the spark plug and tighten it securely.

   I once spent an entire afternoon troubleshooting a starting issue, only to discover a hairline crack in the spark plug insulator. A five-dollar replacement solved the problem instantly.

3. Fuel System Check: Fuel is the lifeblood of your chainsaw. If it’s not flowing properly, you’re going nowhere.

   • Step 1: Drain the fuel tank and inspect the fuel. Look for:
     • Stale Fuel: Fuel that’s been sitting for more than a month or two can degrade and cause starting problems.
     • Contamination: Water, dirt, or debris in the fuel.
   • Step 2: Replace the fuel with fresh, high-quality fuel mixed with the correct ratio of two-stroke oil. Stihl recommends a 50:1 ratio for the MS201. I always use Stihl Ultra oil – it’s worth the extra cost for the added protection it provides.
   • Step 3: Inspect the fuel filter. The fuel filter is usually located inside the fuel tank, attached to the fuel line. If it’s clogged or dirty, replace it. Fuel filters are inexpensive and easy to replace.
   • Step 4: Check the fuel lines for cracks, leaks, or blockages. Replace any damaged fuel lines.
   • Step 5: If the problem persists, the carburetor might need cleaning or rebuilding. This is a more complex task, and I recommend taking it to a qualified chainsaw mechanic if you’re not comfortable working on carburetors.

   I learned the hard way about the importance of fresh fuel. I left my MS201 sitting for six months with fuel in the tank, and it refused to start when I needed it most. Now, I always drain the fuel tank before storing my chainsaw for extended periods.

Data Point:

• A study by the Outdoor Power Equipment Institute (OPEI) found that over 60% of chainsaw starting problems are related to fuel issues. Using fresh fuel and properly storing your chainsaw can significantly reduce starting problems.

2. The Case of the Chain That Won’t Cut: Addressing Poor Cutting Performance

A dull chain is a frustrating and dangerous thing. It makes cutting difficult, increases the risk of kickback, and puts unnecessary strain on the engine. If your MS201 isn’t cutting like it used to, it’s time to address the chain.

• The Problem: The chainsaw cuts slowly, unevenly, or not at all. It might also produce excessive sawdust instead of chips.
• The Culprits:
  • Dull Chain: The most common cause of poor cutting performance.
  • Incorrect Chain Tension: A chain that’s too loose or too tight can cause problems.
  • Damaged Chain: Missing teeth, broken teeth, or a damaged drive link.
  • Incorrect Depth Gauge Setting: The depth gauge controls how much the cutter bites into the wood. If it’s not set correctly, the chain won’t cut efficiently.

The Expert Fix: Sharpening, Tensioning, and Inspecting

1. Chain Sharpening: This is the most critical step. A sharp chain is a safe and efficient chain. There are two main methods for sharpening a chainsaw chain:

   • Hand Sharpening: Using a file and a guide. This is the method I prefer, as it allows me to maintain the correct angles and depth.

     • Step 1: Secure the chainsaw in a vise or on a stable surface.
     • Step 2: Use a round file of the correct size for your chain (typically 5/32″ for the MS201).
     • Step 3: Place the file in the gullet of the cutter, using a file guide to maintain the correct angle (typically 30-35 degrees).
     • Step 4: File each cutter tooth several times, using smooth, consistent strokes. File all the cutters on one side of the chain, then flip the chainsaw and file the cutters on the other side.
     • Step 5: Use a flat file and a depth gauge tool to adjust the depth gauges. The depth gauges should be slightly lower than the cutter teeth.

   • Electric Chain Sharpener: This is a faster and easier method, but it can be more aggressive and remove more material from the chain.

     • Step 1: Secure the chainsaw in the electric chain sharpener.
     • Step 2: Adjust the sharpener to the correct angles and depth.
     • Step 3: Sharpen each cutter tooth according to the sharpener’s instructions.

   I’ve honed my hand-sharpening skills over years of practice. I can now sharpen a chain in about 15 minutes, and I get a much better result than I ever did with an electric sharpener.

2. Chain Tension Adjustment: Proper chain tension is crucial for safe and efficient cutting.

   • Step 1: Loosen the bar nuts that hold the chain bar in place.
   • Step 2: Use the chain tensioning screw to adjust the chain tension. The chain should be snug against the bar, but you should still be able to pull it around the bar by hand.
   • Step 3: Tighten the bar nuts securely.

   I always check the chain tension after the first few cuts, as the chain will stretch slightly when it heats up.

3. Chain Inspection: Regularly inspect your chain for damage.

   • Missing Teeth: Replace the chain immediately if you find any missing teeth.
   • Broken Teeth: Replace the chain immediately if you find any broken teeth.
   • Damaged Drive Links: Replace the chain immediately if you find any damaged drive links.

   I once ignored a slightly damaged drive link, and it ended up causing the chain to derail and damage the chainsaw bar. It was a costly mistake that I won’t repeat.

Data Point:

• According to Stihl, a sharp chain can increase cutting efficiency by up to 20%. Regular chain sharpening not only improves performance but also reduces wear and tear on the chainsaw engine.

3. The Case of the Oiling System Failure: Keeping Your Chain Lubricated

Proper chain lubrication is essential for extending the life of your chain and bar. If the chain isn’t getting enough oil, it will overheat, wear out quickly, and potentially damage the chainsaw.

• The Problem: The chain is dry, even after running the chainsaw for a few minutes.
• The Culprits:
  • Empty Oil Tank: The most obvious cause.
  • Blocked Oil Filter: A clogged oil filter can restrict oil flow.
  • Blocked Oil Passage: Debris or sawdust can block the oil passage.
  • Faulty Oil Pump: A damaged or worn-out oil pump might not be able to pump enough oil.

The Expert Fix: Cleaning, Inspecting, and Replacing

1. Check the Oil Tank and Fill It: This might sound obvious, but it’s the first thing I check. Make sure the oil tank is full of high-quality bar and chain oil. I prefer Stihl bar and chain oil, as it’s specifically formulated for Stihl chainsaws.

2. Clean the Oil Filter: The oil filter is usually located inside the oil tank, attached to the oil line.

   • Step 1: Drain the oil tank.
   • Step 2: Remove the oil filter.
   • Step 3: Clean the oil filter with solvent or compressed air.
   • Step 4: Replace the oil filter if it’s damaged or excessively clogged.

   I clean my oil filter every time I sharpen my chain. It’s a quick and easy task that can prevent a lot of problems.

3. Clean the Oil Passage: Debris or sawdust can block the oil passage, preventing oil from reaching the chain.

   • Step 1: Remove the chain and bar.
   • Step 2: Locate the oil outlet on the chainsaw body.
   • Step 3: Use a small wire or compressed air to clear any debris from the oil outlet.
   • Step 4: Reinstall the chain and bar.

   I once spent hours troubleshooting an oiling problem, only to discover a tiny piece of bark blocking the oil outlet. It was a frustrating experience, but it taught me the importance of thoroughly cleaning the oil passage.

4. Inspect the Oil Pump: If the oil filter and oil passage are clear, the problem might be with the oil pump.

   • Step 1: Remove the clutch cover and clutch.
   • Step 2: Locate the oil pump.
   • Step 3: Inspect the oil pump for damage or wear.
   • Step 4: Replace the oil pump if it’s damaged or worn out.

   Replacing the oil pump is a more complex task, and I recommend taking it to a qualified chainsaw mechanic if you’re not comfortable working on it.

Data Point:

• A study by Oregon Products found that proper chain lubrication can extend the life of a chainsaw chain by up to 50%. Regular maintenance of the oiling system is crucial for maximizing the lifespan of your chain and bar.

Strategic Insights for Wood Processing and Firewood Preparation

Beyond just fixing problems, I’ve learned a lot about optimizing the whole wood processing and firewood preparation process. Here’s some insights I’ve gained over the years.

Workflow Optimization: From Log to Firewood

Workflow optimization is key to maximizing efficiency and minimizing wasted time and effort. Here’s how I approach it:

• Log Handling Efficiency: Invest in good log handling tools, such as log tongs, cant hooks, and a log splitter. These tools can significantly reduce the amount of manual labor required to move and process logs.
• Strategic Stacking: Stack logs in a way that promotes airflow and accelerates drying. I prefer to stack logs in a single row, with plenty of space between each log. This allows air to circulate freely, which helps to prevent mold and rot.

• Splitting Strategy: Develop a splitting strategy that minimizes wasted wood. I try to split logs into uniform sizes, which makes them easier to stack and burn.

  • Data Point: A study by the University of Maine found that proper log stacking can reduce drying time by up to 30%.

Material Sourcing Strategies: Selecting Sustainable Timber

Sustainable timber sourcing is important for protecting our forests and ensuring that future generations have access to this valuable resource. Here’s how I approach it:

• Buy from Reputable Suppliers: Choose suppliers who are committed to sustainable forestry practices. Look for suppliers who are certified by organizations such as the Forest Stewardship Council (FSC).
• Harvest Responsibly: If you’re harvesting your own timber, make sure to follow sustainable harvesting practices. This includes avoiding clear-cutting, protecting water sources, and replanting trees.
• Utilize Waste Wood: Don’t let waste wood go to waste. Use it for kindling, mulch, or other purposes.

Tool Usage Efficiency: Chainsaw Maintenance Routines

Regular chainsaw maintenance is essential for keeping your chainsaw running smoothly and safely. Here’s my chainsaw maintenance routine:

• Daily:
  • Check the chain tension.
  • Sharpen the chain.
  • Clean the chainsaw.
  • Check the oil and fuel levels.
• Weekly:
  • Clean the air filter.
  • Inspect the spark plug.
  • Clean the oil filter.
  • Grease the bar tip.
• Monthly:
  • Inspect the fuel lines.
  • Inspect the oil lines.
  • Check the anti-vibration mounts.

• Annually:

  • Have the carburetor professionally cleaned and adjusted.
  • Replace the spark plug.
  • Replace the fuel filter.

  • Replace the oil filter.

  • Data Point: According to a study by the American Society of Agricultural and Biological Engineers (ASABE), regular chainsaw maintenance can extend the life of a chainsaw by up to 25%.

Original Research: Case Study of a Successful Firewood Preparation Project

I recently completed a firewood preparation project for a local community center. The project involved harvesting fallen trees from a nearby forest, processing the logs into firewood, and delivering the firewood to the community center.

• Project Goals:
  • Provide the community center with a sustainable source of firewood.
  • Reduce the risk of wildfires by removing fallen trees from the forest.
  • Minimize the environmental impact of the project.
• Project Execution:
  • I worked with a local forester to identify fallen trees that could be harvested sustainably.
  • I used my Stihl MS201 chainsaw to cut the logs into manageable lengths.
  • I used a log splitter to split the logs into firewood.
  • I stacked the firewood in a single row to promote airflow and accelerate drying.
  • I delivered the firewood to the community center after it had dried for six months.
• Project Results:
  • The community center now has a sustainable source of firewood.
  • The risk of wildfires has been reduced.
  • The environmental impact of the project was minimized.

This project demonstrated the importance of careful planning, sustainable harvesting practices, and efficient wood processing techniques.

Common Challenges and Solutions

Even with the best planning and preparation, challenges are inevitable. Here are some common challenges I’ve faced, and the solutions I’ve found:

• Minimizing Wood Waste:
  • Challenge: Wood waste can be a significant problem, especially when processing large logs.
  • Solution: Use a log splitter to split logs into uniform sizes. This will minimize the amount of wood that is wasted. Also, utilize smaller pieces of wood for kindling or other purposes.
• Dealing with Difficult Wood:
  • Challenge: Some types of wood are more difficult to cut than others.
  • Solution: Use a sharp chain and a powerful chainsaw. Also, be patient and take your time.
• Working in Inclement Weather:
  • Challenge: Working in inclement weather can be dangerous and uncomfortable.
  • Solution: Wear appropriate clothing and footwear. Also, take frequent breaks to warm up and dry off.

Current Trends and Best Practices in Wood Processing and Firewood Production

The wood processing and firewood production industry is constantly evolving. Here are some current trends and best practices:

• Automation: Automation is becoming increasingly common in the wood processing industry. Automated log splitters, firewood processors, and other machines can significantly increase efficiency and reduce labor costs.
• Bioenergy: Bioenergy is a growing trend in the firewood production industry. Firewood is a renewable energy source that can be used to heat homes and businesses.
• Sustainability: Sustainability is becoming increasingly important in the wood processing and firewood production industry. Consumers are demanding wood products that are sourced sustainably.

Takeaways and Next Steps

Troubleshooting a Stihl MS201 chainsaw can be frustrating, but with a systematic approach and a little knowledge, you can often fix the problem yourself. Remember to focus on the basics: fuel, spark, and compression. And don’t forget the importance of regular maintenance.

Here are some key takeaways:

• Starting Problems: Check for flooding, spark plug issues, and fuel problems.
• Poor Cutting Performance: Sharpen the chain, adjust the chain tension, and inspect the chain for damage.
• Oiling System Failure: Check the oil tank, clean the oil filter, and clean the oil passage.

As for next steps, I encourage you to:

1. Review your owner’s manual: It’s your best source of information for your specific model.
2. Gather the necessary tools: Spark plug wrench, files, gauges, etc.
3. Start troubleshooting: Don’t be afraid to get your hands dirty.

With a little effort, you can keep your Stihl MS201 running smoothly for years to come. And remember, a well-maintained chainsaw is a safe and efficient chainsaw. Now, get out there and cut some wood!

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