MS170 Chain Saw Guide (5 Expert Tips for Peak Performance)

Sometimes, the smallest tool can make the biggest difference. It’s a paradox, right? You might think that felling massive trees or splitting cords of wood requires the heftiest, most powerful machinery. But I’ve found that often, the nimble, reliable workhorse – like the Stihl MS 170 chainsaw – is exactly what you need to get the job done efficiently and safely.

Over the years, I’ve spent countless hours in the woods, from the dense forests of the Pacific Northwest to the sun-drenched groves of the Mediterranean. I’ve wielded everything from axes to industrial-grade harvesters. And through it all, I’ve developed a deep appreciation for the right tool for the right job. The MS 170 might not be the biggest or baddest saw on the market, but it’s a fantastic all-rounder, especially for smaller tasks, property maintenance, and firewood preparation.

This guide isn’t just about listing specs and features. It’s about sharing my experience, the lessons I’ve learned (sometimes the hard way!), and the best practices I’ve discovered for getting the most out of your MS 170. I’m going to give you 5 expert tips to elevate your chainsaw performance.

MS 170 Chain Saw Guide: 5 Expert Tips for Peak Performance

1. Mastering the Art of Chain Maintenance: Sharpness is King

I can’t stress this enough: a sharp chain is the single most important factor in chainsaw performance. A dull chain doesn’t cut; it tears and chews. This not only makes the job harder but also significantly increases the risk of kickback and puts unnecessary strain on the saw’s engine.

Why Sharpness Matters:

• Efficiency: A sharp chain cuts through wood quickly and cleanly, reducing the time and effort required.
• Safety: A sharp chain is less likely to bind or kickback. Kickback is the sudden, uncontrolled upward or backward movement of the chainsaw, which can cause serious injury.
• Saw Longevity: A sharp chain reduces the load on the engine, extending its lifespan.
• Wood Quality: A sharp chain produces cleaner cuts, which are important for woodworking projects or maximizing firewood yield.

My Go-To Sharpening Routine:

I sharpen my chains frequently – ideally after every tank of gas or any time I notice a decrease in cutting performance. I use a few different methods depending on the situation.

• Field Sharpening with a File: For quick touch-ups in the field, I rely on a chainsaw file and a depth gauge tool. I use a 5/32″ (4.0 mm) round file for the MS 170’s chain. It’s crucial to maintain the correct angle (typically 30 degrees) and depth when filing each cutter. A depth gauge ensures that the rakers (the small metal pieces in front of each cutter) are at the correct height, preventing the chain from grabbing too aggressively.
  • Pro Tip: Always file from the inside of the cutter outwards. Use smooth, consistent strokes and count the number of strokes per cutter to ensure even sharpening.
• Bench Grinder for More Significant Sharpening: For more significant sharpening, I use a bench grinder with a specialized chainsaw sharpening attachment. This allows for more precise and consistent sharpening. However, it’s easy to remove too much material with a grinder, so I proceed with caution and always follow the manufacturer’s instructions.
  • Data Point: Studies have shown that using a bench grinder can reduce sharpening time by up to 50% compared to manual filing. However, improper use can also reduce chain life by up to 25%.
• Professional Sharpening: If I’m dealing with a severely damaged or worn chain, I’ll take it to a professional sharpening service. They have the expertise and equipment to restore the chain to its original sharpness and cutting profile.

Beyond Sharpening: Chain Maintenance Essentials:

• Chain Tension: Proper chain tension is critical for safe and efficient cutting. The chain should be snug against the guide bar but still able to be pulled around by hand. Too loose, and it can derail; too tight, and it can overheat and break.
  • My Experience: I once ignored a slightly loose chain, thinking it would be fine for a quick cut. The chain derailed mid-cut, sending the saw bouncing dangerously. Lesson learned: always double-check the tension before starting.
• Chain Lubrication: Chainsaws need a constant supply of oil to lubricate the chain and guide bar. I use a high-quality bar and chain oil specifically designed for chainsaws. Check the oil level frequently and refill as needed. Insufficient lubrication will cause the chain to overheat, wear prematurely, and eventually break.
  • Unique Insight: I’ve experimented with different bar and chain oils and found that synthetic oils tend to provide better lubrication and last longer than conventional oils, especially in cold weather.
• Chain Cleaning: Sawdust and debris can accumulate on the chain and guide bar, reducing cutting performance and increasing wear. I clean my chain and guide bar regularly with a wire brush and solvent.
  • Actionable Takeaway: After each use, remove the chain and guide bar and thoroughly clean them. This simple step can significantly extend their lifespan.

2. Fueling Success: Optimizing Fuel and Oil Mixtures

The MS 170 is a two-stroke engine, meaning it requires a specific mixture of gasoline and oil. Using the wrong mixture can damage the engine and significantly reduce its performance.

The Right Mix Ratio:

Stihl recommends a 50:1 fuel-to-oil ratio for the MS 170. This means 50 parts gasoline to 1 part two-stroke oil. Using pre-mixed fuel is an option, but I prefer to mix my own to ensure the quality and freshness of the fuel.

Choosing the Right Fuel:

• Gasoline: I always use high-octane (91 or higher) unleaded gasoline. Lower octane fuels can cause engine knocking and reduce performance.
• Two-Stroke Oil: I use a high-quality, synthetic two-stroke oil specifically designed for air-cooled engines. Synthetic oils provide better lubrication and reduce carbon buildup compared to conventional oils.
  • Data Point: Using a high-quality synthetic two-stroke oil can extend engine life by up to 30% compared to using a conventional oil.

Mixing Fuel Properly:

• Use a Clean Container: I use a clean, dedicated fuel container to mix my fuel. This prevents contamination and ensures the correct ratio.
• Measure Accurately: I use a measuring cup or graduated cylinder to measure the gasoline and oil accurately. Eyeballing it is a recipe for disaster.
• Mix Thoroughly: I mix the fuel and oil thoroughly by shaking the container vigorously for at least 30 seconds.
• Label the Container: I label the container with the date and the fuel-to-oil ratio. This helps me keep track of the fuel’s age and ensures that I’m using the correct mixture.

Why Fresh Fuel Matters:

Gasoline can degrade over time, especially when mixed with oil. Stale fuel can cause starting problems, reduced performance, and engine damage. I never use fuel that is more than 30 days old.

My Fuel Storage Practices:

• Store Fuel in a Cool, Dry Place: I store my fuel in a cool, dry place away from direct sunlight and heat.
• Use a Stabilizer: If I’m not going to use the fuel within 30 days, I add a fuel stabilizer to prevent degradation.
• Drain the Fuel Tank: If I’m storing the chainsaw for an extended period, I drain the fuel tank completely to prevent gumming and corrosion.

The Cost of Neglect:

I once ignored the importance of fresh fuel and tried to start my MS 170 after it had been sitting unused for several months. The engine wouldn’t start, and I ended up having to clean the carburetor and fuel lines. It was a time-consuming and frustrating experience that could have been avoided by simply using fresh fuel.

3. Mastering Cutting Techniques: Precision and Control

The MS 170 is a relatively lightweight and maneuverable chainsaw, making it ideal for a variety of cutting tasks. However, proper cutting techniques are essential for safety, efficiency, and achieving the desired results.

Essential Cutting Techniques:

• Felling Small Trees: When felling small trees, I use the bore cut technique to control the direction of the fall. This involves making a notch cut on the side of the tree facing the desired direction of fall, followed by a back cut on the opposite side. I leave a hinge of wood between the two cuts to guide the tree as it falls.
  • Safety First: Always clear the area around the tree of any obstacles and ensure that you have a clear escape route.
• Limbing: Limbing involves removing the branches from a felled tree. I use a combination of top cutting and bottom cutting techniques, depending on the size and position of the branches.
  • Pro Tip: Always stand on the uphill side of the tree when limbing to avoid being hit by falling branches.
• Bucking: Bucking is the process of cutting a log into shorter, more manageable lengths. I use a variety of bucking techniques depending on the size and position of the log.
  • Data Point: Studies have shown that proper bucking techniques can increase firewood yield by up to 15%.
• Making Precision Cuts: The MS 170 can be used for making precise cuts for woodworking projects. I use a guide to ensure straight and accurate cuts.
  • My Experience: I’ve used my MS 170 to cut lumber for building raised garden beds and small sheds. With a sharp chain and a steady hand, it can produce surprisingly accurate results.

Avoiding Kickback:

Kickback is one of the most common and dangerous chainsaw injuries. It occurs when the tip of the guide bar contacts a solid object or is pinched in the cut. The saw can suddenly kick back towards the operator with tremendous force.

• Stay Alert: I always pay close attention to the position of the guide bar and avoid contacting solid objects.
• Use the Correct Cutting Technique: I use the bore cut technique when felling trees to avoid pinching the guide bar.
• Maintain a Firm Grip: I always maintain a firm grip on the chainsaw with both hands.
• Use a Chainsaw with Kickback Protection: The MS 170 is equipped with a chain brake, which can stop the chain quickly in the event of kickback. I always make sure that the chain brake is functioning properly before starting the saw.

The Importance of Proper Posture:

Maintaining proper posture while using a chainsaw is crucial for preventing fatigue and injury. I keep my back straight, my feet shoulder-width apart, and my knees slightly bent. This allows me to maintain balance and control of the saw.

Case Study: Optimizing Firewood Production:

I once worked on a project to clear a large area of overgrown brush and trees for a local community garden. We used MS 170 chainsaws to fell and buck the trees into firewood. By using proper cutting techniques and optimizing the bucking process, we were able to produce a significant amount of firewood for the community while minimizing waste.

• Equipment Used: Stihl MS 170 chainsaws, safety helmets, eye protection, hearing protection, gloves, and chaps.
• Wood Types: Primarily oak, maple, and ash.
• Safety Considerations: We conducted a thorough hazard assessment before starting the project and implemented strict safety protocols, including mandatory safety training for all participants.

4. Decoding Troubleshooting: Common Issues and Solutions

Even with proper care and maintenance, the MS 170 can experience occasional problems. Knowing how to troubleshoot common issues can save you time and money.

Common Problems and Solutions:

• Engine Won’t Start:
  • Possible Causes: Empty fuel tank, stale fuel, fouled spark plug, clogged air filter, clogged fuel filter.
  • Solutions: Refill the fuel tank with fresh fuel, replace the spark plug, clean or replace the air filter, clean or replace the fuel filter.
  • My Experience: I once spent hours trying to start my MS 170, only to discover that the fuel filter was completely clogged. Replacing the filter solved the problem immediately.
• Engine Runs Poorly:
  • Possible Causes: Stale fuel, incorrect fuel-to-oil ratio, clogged air filter, clogged fuel filter, carburetor problems.
  • Solutions: Drain the fuel tank and refill with fresh fuel, ensure the correct fuel-to-oil ratio, clean or replace the air filter, clean or replace the fuel filter, adjust the carburetor.
• Chain Doesn’t Cut Properly:
  • Possible Causes: Dull chain, incorrect chain tension, insufficient chain lubrication, worn guide bar.
  • Solutions: Sharpen the chain, adjust the chain tension, check the oil level and ensure proper lubrication, replace the guide bar.
• Chain Keeps Derailing:
  • Possible Causes: Incorrect chain tension, worn drive sprocket, worn guide bar, damaged chain.
  • Solutions: Adjust the chain tension, replace the drive sprocket, replace the guide bar, replace the chain.
• Overheating:
  • Possible Causes: Clogged air filter, insufficient chain lubrication, running the saw at high RPMs for extended periods.
  • Solutions: Clean or replace the air filter, check the oil level and ensure proper lubrication, avoid running the saw at high RPMs for extended periods.

Basic Maintenance Tasks:

• Spark Plug Replacement: I replace the spark plug annually or whenever it becomes fouled.
• Air Filter Cleaning: I clean the air filter after each use and replace it every six months.
• Fuel Filter Replacement: I replace the fuel filter annually.
• Guide Bar Maintenance: I clean the guide bar regularly and check it for wear. I also flip the guide bar periodically to ensure even wear.
• Drive Sprocket Inspection: I inspect the drive sprocket for wear and replace it as needed.

When to Seek Professional Help:

If you’re unable to diagnose or repair a problem with your MS 170, it’s best to take it to a qualified service technician. Attempting to repair complex engine problems without the proper knowledge and tools can cause further damage.

Unique Insight: I’ve found that keeping a detailed maintenance log can help track the performance of my MS 170 and identify potential problems early on.

5. Prioritizing Safety: Gear Up and Stay Protected

Chainsaw operation is inherently dangerous, and safety should always be your top priority. Wearing the appropriate safety gear and following safe operating procedures can significantly reduce the risk of injury.

Essential Safety Gear:

• Helmet: A hard hat protects your head from falling branches and debris.
• Eye Protection: Safety glasses or a face shield protect your eyes from flying wood chips and sawdust.
• Hearing Protection: Earplugs or earmuffs protect your hearing from the loud noise of the chainsaw.
• Gloves: Gloves protect your hands from cuts and abrasions.
• Chaps: Chainsaw chaps are designed to stop the chain quickly in the event of accidental contact with your legs.
• Steel-Toed Boots: Steel-toed boots protect your feet from falling logs and other hazards.

Safe Operating Procedures:

• Read the Owner’s Manual: I always read and understand the owner’s manual before operating the MS 170.
• Inspect the Chainsaw: I inspect the chainsaw before each use to ensure that it is in good working order.
• Clear the Work Area: I clear the work area of any obstacles and ensure that there is a clear escape route.
• Maintain a Safe Distance: I maintain a safe distance from other people and objects while operating the chainsaw.
• Use the Correct Cutting Technique: I use the correct cutting technique for the task at hand.
• Avoid Cutting Overhead: I avoid cutting overhead whenever possible.
• Take Breaks: I take frequent breaks to avoid fatigue.
• Never Operate Under the Influence: I never operate a chainsaw under the influence of alcohol or drugs.

Understanding Kickback Zones:

The tip of the guide bar is the most dangerous area of the chainsaw. Contact with a solid object in this area can cause the saw to kick back violently. I am aware of the kickback zones and avoid cutting in these areas whenever possible.

Emergency Preparedness:

I always carry a first-aid kit with me when operating a chainsaw. I also know how to contact emergency services in case of an accident.

Data Point: Studies have shown that wearing appropriate safety gear can reduce the risk of chainsaw injuries by up to 70%.

Personal Story: A Close Call:

I once witnessed a fellow woodcutter suffer a serious leg injury while operating a chainsaw without chaps. The saw kicked back and contacted his leg, causing a deep laceration. The incident served as a stark reminder of the importance of wearing proper safety gear and following safe operating procedures.

Actionable Takeaway: Before starting any chainsaw project, take the time to assess the risks and ensure that you have the appropriate safety gear and knowledge.

By following these 5 expert tips, you can unlock the full potential of your Stihl MS 170 chainsaw and enjoy years of safe and efficient wood processing. Remember, a little bit of knowledge and preparation can go a long way in the world of chainsaws. Now, get out there and make some sawdust!

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