Stihl MS170 Owners Manual⁚ A Comprehensive Guide
This comprehensive guide provides detailed information about the Stihl MS 170 chainsaw, covering safety precautions, operating procedures, maintenance, and troubleshooting. The manual is designed to help you safely and effectively operate your chainsaw, ensuring a positive experience.
Introduction
The Stihl MS 170 is a lightweight and compact chainsaw designed for occasional use by homeowners. It is a reliable and easy-to-use tool for tasks such as trimming small trees, cutting firewood, and clearing storm debris. The MS 170 features a powerful engine and a durable design, making it a practical choice for light-duty applications. This manual provides comprehensive information on the operation, maintenance, and safety features of the Stihl MS 170 chainsaw. It is essential to read and understand this manual before operating the saw to ensure safe and efficient use. The manual covers various aspects, including safety precautions, working techniques, maintenance procedures, and troubleshooting tips. By following the instructions in this manual, you can maximize the performance and longevity of your Stihl MS 170 chainsaw.
Safety Precautions
Operating a chainsaw requires utmost caution and adherence to safety guidelines. This section outlines essential safety precautions that must be followed to minimize the risk of accidents and injuries. Always wear appropriate personal protective equipment (PPE) including safety glasses, hearing protection, gloves, and sturdy footwear. Before starting the saw, inspect the chain for sharpness and proper tension. Ensure the chain brake is functioning correctly. Never operate the saw with a loose or damaged chain. Avoid using the chainsaw in wet or slippery conditions, as this can increase the risk of slipping or falling. Never attempt to cut above shoulder height, as this can lead to loss of control and serious injury. Keep a clear work area free of debris and obstructions. Never operate the chainsaw near flammable materials or in areas with potential fire hazards. Exercise extreme caution when working near power lines or other utilities. Be aware of the surrounding environment and potential hazards. Always maintain a firm grip on the chainsaw and avoid operating it with one hand. If the chainsaw becomes entangled or jammed, immediately stop the engine and disengage the chain. Never attempt to clear a jam while the engine is running. When transporting the chainsaw, always use a carrying case or secure it to prevent accidental activation. Always follow the specific safety instructions provided in the operating manual.
Reactive Forces
Chainsaws generate powerful reactive forces that can unexpectedly throw the saw back towards the operator, potentially causing serious injury. Understanding and managing these forces is crucial for safe operation. The main reactive force is kickback, which occurs when the saw chain encounters an object or is pinched, causing the saw to suddenly jerk back towards the operator. Kickback can be minimized by using proper cutting techniques, maintaining a firm grip on the saw, and avoiding cutting above shoulder height. Another reactive force is torque, which is the twisting force that can cause the saw to rotate in the operator’s hands. To mitigate torque, keep a firm grip on the saw, use both hands to control it, and maintain a balanced stance. The saw’s weight and design also contribute to reactive forces; Lighter saws can be easier to control, but they may also generate more torque.
Working Techniques
Proper working techniques are essential for safe and efficient operation of the Stihl MS 170 chainsaw. Before starting any cutting task, carefully inspect the area for obstacles, overhead hazards, and potential kickback risks. Always wear appropriate personal protective equipment, including safety glasses, hearing protection, gloves, and sturdy footwear. When cutting, maintain a firm grip on the saw with both hands, using the front handle for precise control and the rear handle for support. Avoid reaching with the saw and keep your body positioned away from the cutting area. Use a smooth, consistent cutting motion, avoiding sudden movements that could cause kickback. When cutting large logs, make a series of cuts, starting with a small cut on the opposite side of the log from the direction you want the log to fall. This will create a hinge that helps control the direction of the fall. When cutting branches, start with a small cut on the underside of the branch, followed by a larger cut from the top. This prevents the branch from splitting or breaking, which could cause kickback. Always be aware of your surroundings and potential hazards, and never operate the saw when tired or under the influence of alcohol or drugs.
Cutting Attachment
The cutting attachment of the Stihl MS 170 chainsaw consists of the guide bar and saw chain. The guide bar is a metal rail that guides the saw chain around the wood being cut. The saw chain is a series of interlocking teeth that are attached to the guide bar. The saw chain is responsible for cutting the wood. The guide bar and saw chain are designed to work together to provide a smooth, efficient cutting action. The guide bar is available in different lengths, depending on the type of cutting work being done. The saw chain is also available in different sizes and types, depending on the type of wood being cut. The saw chain should be kept sharp and properly tensioned for optimal performance. A dull saw chain will not cut as efficiently and can increase the risk of kickback. A loose saw chain can also cause problems, such as excessive vibration and premature wear. Always use the correct guide bar and saw chain for your Stihl MS 170 chainsaw. Refer to the owner’s manual for specific recommendations on guide bar and saw chain selection.
Mounting the Bar and Chain
Mounting the bar and chain on your Stihl MS 170 chainsaw is a crucial step in ensuring safe and efficient operation. Before you begin, ensure the engine is off and the saw chain brake is engaged. This prevents accidental starting and chain movement. Locate the bar nuts on the chainsaw. These are typically located on either side of the guide bar. Using a wrench, loosen the bar nuts. Slide the guide bar onto the chainsaw, ensuring it is properly aligned with the mounting slots. Slide the saw chain over the guide bar, making sure the drive link is properly engaged with the sprocket. Tighten the bar nuts securely, but avoid over-tightening. Once the nuts are tightened, check the chain tension. The chain should be taut but not overly tight. To adjust tension, use the chain tensioner located on the side of the chainsaw. Turn the tensioner clockwise to tighten the chain and counterclockwise to loosen it. After adjusting the chain tension, re-check the bar nuts for tightness. Ensure the chain brake is functioning properly by pulling the brake lever. The saw chain should stop immediately. If the chain does not stop or if you encounter any issues during the mounting process, consult your Stihl MS 170 owner’s manual for detailed instructions and troubleshooting guidance.
Chain Brake
The chain brake is a vital safety feature on your Stihl MS 170 chainsaw, designed to stop the saw chain instantly in case of kickback or other unexpected events. It acts as a protective shield, preventing serious injuries. The chain brake is activated by a lever located on the top of the front handle. When the lever is engaged, it applies pressure to the chain brake mechanism, stopping the chain’s rotation. Understanding how to operate the chain brake is essential for safe chainsaw use. Always ensure the chain brake is engaged before starting the chainsaw, and keep your hand on the front handle to maintain control. If you experience kickback, the chain brake should activate automatically. However, it’s crucial to practice engaging and disengaging the chain brake regularly. This helps you become familiar with its operation and ensures it’s functioning correctly. If you notice any issues with the chain brake, such as difficulty engaging or disengaging, or if it doesn’t stop the chain effectively, consult your Stihl MS 170 owner’s manual for troubleshooting guidance or contact an authorized Stihl service center. Remember, a properly functioning chain brake is a crucial safety element that can prevent serious injuries. Always prioritize safety and familiarize yourself with all safety features on your chainsaw.
Maintenance and Repair
Regular maintenance is crucial for ensuring your Stihl MS 170 chainsaw operates efficiently and safely. It involves a series of tasks that extend the lifespan of your machine and prevent potential problems. Begin by checking the air filter regularly for dirt and debris. A clogged air filter can hinder engine performance and lead to overheating. Clean or replace the filter as needed. The fuel filter should also be checked for blockages, and replaced when necessary. A dirty fuel filter can restrict fuel flow and affect engine performance. Inspect the spark plug for wear and tear, and replace it if it’s fouled or damaged. A worn-out spark plug can cause misfires and starting issues. Lubrication is essential for smooth operation. Regularly lubricate the chain and bar to prevent wear and tear and ensure smooth cutting. Check the chain tension periodically and adjust it as needed to maintain proper cutting performance. Inspect the guide bar for damage or wear and replace it if necessary. A damaged bar can lead to chain slippage and safety issues. Periodically check the chain brake for proper function. Ensure it engages and disengages smoothly, and consult your owner’s manual for troubleshooting if any issues arise. Keep the chainsaw clean and free of debris after each use. Store it in a dry, secure location. If you encounter any major issues with your Stihl MS 170 chainsaw, consult your owner’s manual for troubleshooting guidance or contact an authorized Stihl service center for professional repair.
Troubleshooting
While the Stihl MS 170 chainsaw is known for its reliability, you may occasionally encounter issues. Here are some common troubleshooting tips⁚ If the chainsaw fails to start, first check the fuel supply and ensure the fuel tank is full and the fuel line is not clogged. Verify the spark plug is properly connected and functioning. Inspect the air filter for dirt and debris, as a clogged filter can hinder engine performance. If the engine starts but dies immediately, check the fuel lines for leaks or blockages. Verify the fuel mix ratio is correct and that the fuel is fresh. If the chainsaw starts but runs poorly, inspect the air filter and spark plug. Ensure the chain tension is correct. If the chainsaw cuts erratically or stalls, check the chain sharpness. A dull chain can cause the chainsaw to stall or cut unevenly. Inspect the bar for damage or wear. Ensure the carburetor is properly adjusted. If the chainsaw overheats, check the air filter for dirt and debris. Verify the cooling fins are clear of obstructions. Ensure the fuel mix ratio is correct. If the chain brake fails to engage, inspect the brake mechanism for damage or wear. Ensure the brake lever is properly adjusted. For any persistent issues, consult your owner’s manual for further troubleshooting guidance or contact an authorized Stihl service center.
Warranty Information
Stihl provides a comprehensive warranty for their products, including the MS 170 chainsaw. The specific warranty terms and conditions may vary depending on the country of purchase and the date of purchase. In general, Stihl offers a two-year limited warranty on their products, covering defects in materials and workmanship. This warranty does not cover normal wear and tear, damage caused by misuse, neglect, accidents, or unauthorized repairs. To obtain warranty service, you must contact an authorized Stihl dealer or service center. You will typically need to provide proof of purchase, such as a sales receipt. The dealer or service center will assess the issue and determine if it is covered under warranty. If the issue is covered, they will repair or replace the product at no cost to you. Keep in mind that warranty service may be limited or unavailable in certain regions or for certain types of damage. For complete details regarding your warranty, it is essential to refer to the warranty information provided in your owner’s manual or contact your local Stihl dealer or service center.
Contact Information
For any questions, concerns, or inquiries related to your Stihl MS 170 chainsaw, including warranty information, product support, or service needs, you can reach out to Stihl through various channels. You can find a comprehensive list of authorized Stihl dealers and service centers on the official Stihl website. These dealers are equipped to provide expert assistance, repairs, and parts for Stihl products. To locate a dealer near you, you can use the dealer locator tool available on the Stihl website. Alternatively, you can contact Stihl directly through their customer service hotline. The phone number for Stihl customer service is available on the website. Stihl also provides email support for customer inquiries. The email address for customer service can be found on the Stihl website. Additionally, Stihl maintains an active presence on social media platforms, including Facebook, Twitter, and Instagram. You can reach out to Stihl through these platforms for general inquiries or product updates. Stihl is committed to providing excellent customer support and ensuring a positive experience for all users of their products.
Resources
For further information and assistance with your Stihl MS 170 chainsaw, you can explore various resources available online and through authorized Stihl dealers. The official Stihl website is a comprehensive resource for all things Stihl, including product information, manuals, troubleshooting guides, and parts catalogs. You can access the online instruction manuals for the Stihl MS 170, which provide detailed information on operating procedures, maintenance, and safety precautions. Stihl also offers a variety of video tutorials on their website and YouTube channel, covering topics such as chain sharpening, assembly, and troubleshooting. These videos provide a visual guide to understanding the processes involved. For specific questions or technical support, you can access Stihl’s online forums, where you can connect with other Stihl owners and exchange knowledge and experiences. These forums are a valuable resource for troubleshooting issues, finding solutions, and getting advice from fellow enthusiasts. In addition to online resources, authorized Stihl dealers are a valuable source of information and support. They can provide expert advice, repairs, and parts for your Stihl MS 170. You can find a list of authorized dealers on the Stihl website using the dealer locator tool.