Stihl MS 170 Chain Guide (5 Expert Tips For Bar Upgrades)

Let’s ignite your Stihl MS 170’s potential! I remember the first time I picked up a Stihl MS 170. It felt like a toy compared to the professional saws my grandfather used in his logging business. But don’t underestimate this little workhorse. With the right bar upgrade, you can transform it into a significantly more capable machine. I’ve spent years experimenting with different bars and chains on my MS 170, pushing it to its limits and learning what works best. This guide will give you my top 5 expert tips for bar upgrades, so you can optimize your saw for various tasks, from limbing and pruning to small-scale firewood cutting.

Stihl MS 170 Chain Guide: 5 Expert Tips for Bar Upgrades

The Stihl MS 170 is a fantastic entry-level chainsaw, known for its lightweight design and ease of use. However, its stock configuration can be limiting. Upgrading the bar can significantly enhance its performance, safety, and versatility. I’ve found that the key is to choose the right bar length and type for the specific cutting tasks you’ll be tackling.

1. Understanding Bar Length and Its Impact

Bar length is a crucial factor when choosing a replacement for your Stihl MS 170. The stock bar is typically 16 inches, which is suitable for general use. However, depending on your needs, you might want to consider a shorter or longer bar.

Shorter Bars (12-14 inches): These are ideal for limbing, pruning, and carving. They offer better maneuverability and control, reducing the risk of kickback. I’ve used a 12-inch bar extensively for detailed work around my property, and the precision is unmatched.
Longer Bars (18-20 inches): These are better suited for felling small trees and cutting larger logs. They increase your reach and cutting capacity but can make the saw feel heavier and less balanced. I once tried a 20-inch bar on my MS 170, and while it could handle larger logs, the saw felt significantly underpowered, and control was compromised.

My Recommendation: Stick to a 14-inch bar if you primarily use your MS 170 for limbing and pruning. A 16-inch bar is a good all-around choice, and an 18-inch bar should only be considered if you occasionally need to cut larger diameter wood, but be prepared for a decrease in cutting speed and increased strain on the saw.

Takeaway: Bar length directly affects the saw’s maneuverability, cutting capacity, and overall balance. Choose wisely based on your primary cutting tasks.

2. Choosing the Right Bar Type: Laminated vs. Solid

Chainsaw bars come in two main types: laminated and solid. Each has its own advantages and disadvantages.

Laminated Bars: These are made from multiple layers of steel welded together. They are lighter and less expensive than solid bars, making them a popular choice for homeowners and occasional users. I’ve found laminated bars to be perfectly adequate for most tasks the MS 170 is designed for.
Solid Bars: These are made from a single piece of steel. They are more durable and resistant to wear than laminated bars, making them suitable for heavy-duty use. However, they are also heavier and more expensive.

My Recommendation: For the Stihl MS 170, a laminated bar is generally sufficient. The saw’s limited power output means you won’t be putting extreme stress on the bar. However, if you plan on using your MS 170 for more demanding tasks, a high-quality laminated bar with a replaceable sprocket nose can be a good compromise.

Case Study: I once used a low-quality laminated bar on my MS 170 while clearing some storm damage. The bar quickly warped and became unusable. Since then, I’ve always opted for reputable brands, even for laminated bars.

Takeaway: Laminated bars are suitable for most MS 170 users, but choose a reputable brand for better durability. Solid bars are overkill for this saw.

3. Considering Chain Pitch and Gauge Compatibility

Chain pitch and gauge are critical specifications that must match the bar and sprocket on your Stihl MS 170. Using the wrong chain can damage the bar, chain, and even the saw itself.

Pitch: This refers to the distance between the rivets on the chain. The Stihl MS 170 typically uses a 3/8″ low-profile (0.375 inch) pitch chain.
Gauge: This refers to the thickness of the drive links that fit into the bar groove. The Stihl MS 170 typically uses a 0.050″ (1.3 mm) gauge chain.

My Recommendation: Always double-check the pitch and gauge specifications before purchasing a new bar or chain. Consult your owner’s manual or a Stihl dealer to ensure compatibility. I always keep a spare chain of the correct pitch and gauge on hand, as a dull or damaged chain can significantly reduce cutting performance.

Practical Tip: When replacing your bar, consider purchasing a new chain at the same time. This ensures that the chain is properly matched to the new bar and that both components are in good condition.

Takeaway: Correct chain pitch and gauge are essential for safe and efficient operation. Always verify compatibility before making a purchase.

4. Exploring Sprocket Nose Bars for Enhanced Performance

Sprocket nose bars feature a small sprocket at the tip of the bar. This sprocket helps to reduce friction and improve chain speed, resulting in faster and smoother cutting.

Advantages: Reduced friction, improved cutting speed, less wear on the chain.
Disadvantages: Slightly more expensive than standard bars, require occasional lubrication of the sprocket.

My Recommendation: A sprocket nose bar can be a worthwhile upgrade for the Stihl MS 170, especially if you frequently cut hardwoods. The increased cutting speed can make a noticeable difference, and the reduced friction can help to extend the life of your chain. I noticed a significant improvement in cutting speed when I switched to a sprocket nose bar for cutting oak firewood.

Maintenance Tip: Regularly lubricate the sprocket on your sprocket nose bar with bar and chain oil to prevent it from seizing up.

Takeaway: Sprocket nose bars offer improved cutting performance but require occasional maintenance.

5. A cheap, poorly made bar can warp, bend, or even break under stress, posing a safety hazard.

Reputable Brands: Stihl, Oregon, and Husqvarna are all well-known for producing high-quality chainsaw bars.

Signs of Quality: Look for bars made from hardened steel with precise manufacturing tolerances. Check for smooth bar rails and a durable sprocket nose (if applicable).

My Recommendation: Invest in a high-quality bar from a reputable brand. While it may cost more upfront, it will provide better performance, last longer, and be safer to use. I’ve learned the hard way that skimping on bar quality is a false economy.

Real-World Example: I once purchased an off-brand bar online for a fraction of the price of a Stihl bar. It quickly developed a bend, causing the chain to derail frequently. I ended up replacing it with a Stihl bar, which has been running flawlessly ever since.

Takeaway: Don’t compromise on bar quality. Choose a reputable brand for better performance, durability, and safety.

Additional Considerations for Stihl MS 170 Bar Upgrades

Beyond the core tips above, there are several other factors to consider when upgrading the bar on your Stihl MS 170.

Maintaining Proper Chain Tension

Proper chain tension is crucial for safe and efficient operation. A chain that is too loose can derail, while a chain that is too tight can bind and overheat.

Checking Tension: To check the chain tension, lift the chain away from the bar in the middle. There should be a small amount of slack, typically around 1/8 inch (3 mm).
Adjusting Tension: Use the tensioning screw on the side of the saw to adjust the chain tension. Tighten the screw to increase tension and loosen it to decrease tension.

My Recommendation: Check the chain tension before each use and adjust it as needed. A new chain will stretch during the first few uses, so it’s important to monitor the tension closely.

Safety Tip: Always wear gloves when adjusting the chain tension, as the chain can be sharp.

Takeaway: Proper chain tension is essential for safe and efficient operation. Check and adjust it regularly.

Sharpening Your Chain Regularly

A sharp chain is essential for efficient cutting and reduces the risk of kickback. A dull chain forces you to apply more pressure, which can strain the saw and increase the risk of accidents.

Signs of a Dull Chain: The saw produces sawdust instead of chips, requires more pressure to cut, and vibrates excessively.
Sharpening Tools: You can sharpen your chain using a file, a chain grinder, or a specialized sharpening tool.

My Recommendation: Learn how to sharpen your chain properly. It’s a valuable skill that will save you time and money. I prefer using a file for quick touch-ups in the field and a chain grinder for more thorough sharpening.

Practical Tip: Invest in a chain sharpening kit that includes a file, a file guide, and a depth gauge. This will help you to sharpen your chain accurately and consistently.

Takeaway: A sharp chain is essential for efficient cutting and safety. Sharpen your chain regularly.

Lubricating Your Bar and Chain

Proper lubrication is essential for preventing wear and tear on the bar and chain. Bar and chain oil reduces friction and helps to keep the chain cool.

Oil Type: Use a high-quality bar and chain oil specifically designed for chainsaws.
Oil Level: Check the oil level regularly and refill as needed.
Oiling System: Ensure that the saw’s oiling system is functioning properly.

My Recommendation: Use a premium bar and chain oil for optimal performance and protection. I prefer using a biodegradable oil to minimize environmental impact.

Maintenance Tip: Clean the oiler port on the bar regularly to prevent it from becoming clogged.

Takeaway: Proper lubrication is essential for preventing wear and tear on the bar and chain. Use a high-quality bar and chain oil and maintain the oiling system.

Storing Your Chainsaw Properly

Proper storage can help to extend the life of your chainsaw and prevent damage.

Cleaning: Clean the saw thoroughly after each use, removing any sawdust, debris, or oil.
Storage Location: Store the saw in a dry, well-ventilated area.
Bar Cover: Use a bar cover to protect the bar and chain from damage.

My Recommendation: Store your chainsaw in a case or on a shelf to protect it from dust and moisture. I always drain the fuel tank before storing my saw for extended periods to prevent fuel from gumming up the carburetor.

Practical Tip: Consider using a fuel stabilizer in the fuel tank to prevent the fuel from deteriorating during storage.

Takeaway: Proper storage can help to extend the life of your chainsaw. Clean the saw thoroughly, store it in a dry location, and use a bar cover.

Safety First: Always Wear Protective Gear

Operating a chainsaw can be dangerous, so it’s essential to wear appropriate protective gear.

Safety Glasses: Protect your eyes from flying debris.
Hearing Protection: Protect your ears from the loud noise of the saw.
Gloves: Protect your hands from cuts and abrasions.
Chainsaw Chaps: Protect your legs from accidental cuts.
Steel-Toed Boots: Protect your feet from falling objects.

My Recommendation: Always wear all of the recommended protective gear when operating a chainsaw. It’s better to be safe than sorry. I’ve seen firsthand the devastating injuries that can result from chainsaw accidents.

Safety Tip: Take a chainsaw safety course to learn proper operating techniques and safety procedures.

Takeaway: Safety is paramount when operating a chainsaw. Always wear appropriate protective gear and follow safety guidelines.

Common Mistakes to Avoid When Upgrading Your Stihl MS 170 Bar

Even with the best intentions, it’s easy to make mistakes when upgrading your Stihl MS 170 bar. Here are some common pitfalls to avoid:

Choosing the Wrong Bar Length: As discussed earlier, selecting the wrong bar length can negatively impact the saw’s performance and handling.
Ignoring Chain Pitch and Gauge: Using the wrong chain pitch and gauge can damage the bar, chain, and saw.
Buying a Low-Quality Bar: Skimping on bar quality can lead to premature wear, warping, and even breakage.
Neglecting Chain Tension: Failing to maintain proper chain tension can cause the chain to derail or bind.
Forgetting to Sharpen the Chain: A dull chain is not only inefficient but also increases the risk of kickback.
Overlooking Lubrication: Insufficient lubrication can cause excessive wear on the bar and chain.
Ignoring Safety Precautions: Neglecting to wear protective gear or follow safety guidelines can lead to serious injuries.

My Recommendation: Take your time, do your research, and follow the recommendations in this guide to avoid these common mistakes.

Takeaway: Avoid common mistakes by carefully selecting the right bar, maintaining proper chain tension, sharpening the chain regularly, lubricating the bar and chain adequately, and prioritizing safety.

Troubleshooting Common Issues After a Bar Upgrade

Even with careful planning and execution, you may encounter some issues after upgrading your Stihl MS 170 bar. Here are some common problems and how to troubleshoot them:

Chain Derailment: This can be caused by a loose chain, a worn bar, or an improperly installed chain. Check the chain tension, inspect the bar for wear, and ensure that the chain is properly seated in the bar groove.
Poor Cutting Performance: This can be caused by a dull chain, insufficient lubrication, or an underpowered saw. Sharpen the chain, check the oil level and oiler function, and ensure that the bar length is appropriate for the saw’s power output.
Excessive Vibration: This can be caused by a loose chain, a bent bar, or a damaged sprocket. Check the chain tension, inspect the bar for damage, and replace any worn or damaged components.
Overheating: This can be caused by insufficient lubrication, a tight chain, or an overloaded saw. Check the oil level and oiler function, adjust the chain tension, and avoid cutting wood that is too large or dense for the saw’s capabilities.

My Recommendation: If you encounter any of these issues, don’t panic. Systematically troubleshoot the problem, starting with the most likely causes. Consult your owner’s manual or a qualified technician if you’re unable to resolve the issue yourself.

Takeaway: Be prepared to troubleshoot common issues after a bar upgrade. Systematically diagnose the problem and consult your owner’s manual or a qualified technician if needed.

The Future of Chainsaw Bar Technology

The world of chainsaw technology is constantly evolving, and chainsaw bars are no exception. Here are some emerging trends and innovations to watch for:

Improved Bar Materials: Manufacturers are constantly experimenting with new materials and manufacturing processes to create bars that are lighter, stronger, and more durable.
Advanced Sprocket Nose Designs: Sprocket nose bars are becoming more sophisticated, with improved lubrication systems and more durable sprockets.
Smart Bars: Some manufacturers are developing “smart” bars that can monitor chain tension, lubrication levels, and bar temperature, providing real-time feedback to the operator.
Biodegradable Bar Oil: With increasing environmental awareness, there is a growing demand for biodegradable bar and chain oil.

My Prediction: In the coming years, we will see more durable, efficient, and environmentally friendly chainsaw bars that incorporate advanced technology to improve performance and safety.

Takeaway: Stay informed about the latest advancements in chainsaw bar technology to make informed decisions about your future upgrades.

Conclusion: Maximizing Your Stihl MS 170’s Potential

The Stihl MS 170 is a capable little chainsaw, and with the right bar upgrade, you can significantly enhance its performance and versatility. By following the expert tips in this guide, you can choose the right bar length and type for your specific needs, ensure proper chain compatibility, prioritize bar quality, and maintain your saw properly.

Remember, safety is always paramount when operating a chainsaw. Wear appropriate protective gear, follow safety guidelines, and take a chainsaw safety course to learn proper operating techniques.

I hope this guide has been helpful. Now go out there and make the most of your Stihl MS 170!

Stihl MS 170 Chain Guide (5 Expert Tips for Bar Upgrades)