Stihl MS170 Owners Manual: A Comprehensive Guide

Unlock the full potential of your Stihl MS170 with our comprehensive guide! This manual provides step-by-step instructions, expert tips, and safety information. The MS170 is a great tool but it is important to read the manual first!

The Stihl MS170 chainsaw is a popular choice for homeowners and light-duty users seeking a reliable and easy-to-use tool for various cutting tasks. This compact and lightweight chainsaw is designed for trimming trees, cutting small logs, and general yard maintenance. With its user-friendly design and affordable price point, the MS170 has become a staple in many households. Before operating your Stihl MS170, it’s crucial to familiarize yourself with its features, capabilities, and safety precautions. This section provides an overview of the MS170 chainsaw, highlighting its key components and intended applications. The Stihl MS170 is powered by a gasoline engine and features a 3/8″ chain pitch, making it suitable for a range of cutting tasks. Its compact size and lightweight design make it easy to maneuver and control, reducing user fatigue during extended use. The MS170 is equipped with essential safety features, including a chain brake and a throttle lock, ensuring safe operation. Always refer to the owner’s manual for detailed instructions and safety guidelines. Proper maintenance and care are essential for extending the life of your Stihl MS170 chainsaw. Regular cleaning, chain sharpening, and lubrication will help ensure optimal performance and prevent premature wear. The MS170 is designed for light-duty tasks and is not recommended for heavy-duty or professional use. Overloading the chainsaw can lead to damage and potentially dangerous situations. Always follow the manufacturer’s recommendations for safe and effective operation. By understanding the capabilities and limitations of the Stihl MS170, you can ensure safe and efficient use for all your cutting needs.

Safety Precautions and Warnings

Operating a chainsaw, such as the Stihl MS170, requires strict adherence to safety precautions to prevent serious injuries or even fatalities. Before using the MS170, carefully read and understand the entire owner’s manual, paying close attention to all safety warnings and instructions. Always wear appropriate personal protective equipment (PPE), including a helmet, eye protection (safety glasses or face shield), hearing protection (earmuffs or earplugs), gloves, long pants, and sturdy boots. Loose clothing can get caught in the chainsaw, leading to severe injuries. Ensure that the work area is clear of obstacles, such as branches, rocks, and debris. Maintain a firm grip on the chainsaw with both hands at all times, keeping your body balanced and stable. Never operate the chainsaw while standing on a ladder or in an unstable position. Be aware of the potential for kickback, a sudden and forceful backward movement of the chainsaw that can cause serious injury. To reduce the risk of kickback, avoid cutting with the upper quadrant of the guide bar tip. Keep the chain sharp and properly tensioned, as a dull or loose chain can increase the risk of kickback. Never operate the chainsaw while under the influence of alcohol, drugs, or medication that may impair your judgment or coordination. Inspect the chainsaw before each use, checking for any damage or loose parts. Ensure that the chain brake is functioning properly. Never modify the chainsaw in any way, as this can compromise its safety features. When transporting the chainsaw, always use a scabbard to cover the guide bar and chain. Store the chainsaw in a safe and secure location, out of reach of children. If you are not comfortable operating a chainsaw, seek professional training before attempting to use the MS170. By following these safety precautions, you can minimize the risk of accidents and injuries while using the Stihl MS170 chainsaw.

Operating Instructions for the MS170

To operate the Stihl MS170 chainsaw safely and effectively, it’s crucial to follow the correct operating procedures outlined in the owner’s manual. Before starting the chainsaw, ensure that it is placed on a stable and level surface. Engage the chain brake by pushing the brake lever forward; This prevents the chain from moving during the starting process. Fill the fuel tank with a mixture of gasoline and two-stroke oil, following the manufacturer’s recommended ratio. Typically, this is a 50:1 mixture (50 parts gasoline to 1 part oil). Use a fuel stabilizer to prolong the life of the fuel mixture. Fill the chain oil tank with chain oil. This lubricates the chain and guide bar, reducing friction and wear. To start the chainsaw, first activate the choke. This enriches the fuel mixture, making it easier to start the engine. On a cold start, fully close the choke. For a warm start, use half-choke or no choke. Pull the starter rope firmly and repeatedly until the engine starts. Once the engine starts, immediately disengage the choke. Allow the engine to warm up for a few seconds before engaging the throttle. To begin cutting, release the chain brake by pulling the brake lever back. Hold the chainsaw firmly with both hands, keeping your body balanced and stable. Apply gentle pressure to the wood, allowing the chain to do the cutting. Avoid forcing the chainsaw, as this can cause it to bind or kick back. When cutting through a log, use a sawing motion, moving the chainsaw back and forth. Be aware of the potential for pinching, where the wood closes in on the chain and guide bar. To prevent pinching, use wedges to keep the cut open. When finished cutting, release the throttle and allow the engine to idle. Engage the chain brake before setting the chainsaw down. To stop the engine, move the stop switch to the “off” position. After each use, clean the chainsaw and inspect it for any damage. Store the chainsaw in a safe and secure location, out of reach of children.

Maintenance and Care of the MS170

Proper maintenance and care are essential for prolonging the life and performance of your Stihl MS170 chainsaw. Regular maintenance tasks include cleaning, inspecting, and lubricating various components. Before performing any maintenance, always stop the engine and disconnect the spark plug wire to prevent accidental starting. Clean the chainsaw after each use. Remove any sawdust, debris, or oil buildup from the engine, air filter, and chain area. Use a brush or compressed air to remove stubborn debris. Inspect the air filter regularly and clean or replace it as needed. A dirty air filter can restrict airflow to the engine, reducing performance and potentially causing damage. To clean the air filter, remove it from the chainsaw and gently tap it to dislodge loose debris. If necessary, wash the air filter with warm, soapy water, rinse it thoroughly, and allow it to dry completely before reinstalling it. Check the spark plug regularly and clean or replace it as needed. A fouled spark plug can cause the engine to run poorly or not start at all. To clean the spark plug, use a wire brush to remove any carbon deposits from the electrode. Inspect the chain regularly for sharpness and damage. A dull chain can be dangerous and inefficient. Sharpen the chain using a chainsaw file or take it to a professional for sharpening. Replace the chain if it is damaged or worn beyond repair. Check the guide bar regularly for wear and damage. Clean the guide bar groove and oil holes to ensure proper lubrication. Replace the guide bar if it is bent, cracked, or excessively worn. Lubricate the chain regularly with chain oil. Proper lubrication reduces friction and wear, extending the life of the chain and guide bar. Check the fuel filter regularly and replace it as needed. A clogged fuel filter can restrict fuel flow to the engine, causing performance problems. Inspect the fuel lines and connections for leaks or damage. Replace any damaged fuel lines or connections. Store the chainsaw in a clean, dry place, away from direct sunlight and extreme temperatures. Drain the fuel tank before storing the chainsaw for extended periods to prevent fuel degradation. By following these maintenance and care tips, you can keep your Stihl MS170 chainsaw in top condition for years to come.

Troubleshooting Common Issues

Even with proper maintenance, you may encounter some common issues with your Stihl MS170 chainsaw. Here are some troubleshooting tips to help you resolve these problems:

Engine Won’t Start:
Check the fuel: Ensure the fuel tank has fresh fuel. Stale fuel can prevent the engine from starting. If the fuel is old, drain the tank and refill it with fresh fuel.
Check the spark plug: Remove the spark plug and inspect it for fouling or damage. Clean the spark plug with a wire brush or replace it if necessary. Also, check the spark plug gap and adjust it to the proper specification.
Check the air filter: A clogged air filter can restrict airflow to the engine, making it difficult to start. Clean or replace the air filter as needed.
Check the ignition system: If the spark plug is clean and gapped correctly, but the engine still won’t start, there may be a problem with the ignition system. Take it to a qualified technician for diagnosis and repair.

Engine Runs Poorly:
Check the fuel: Make sure you are using the correct fuel mixture for your Stihl MS170. Using the wrong fuel mixture can cause the engine to run poorly.
Check the air filter: A dirty air filter can restrict airflow to the engine, causing it to run poorly. Clean or replace the air filter as needed.
Check the spark plug: A fouled spark plug can cause the engine to run poorly. Clean or replace the spark plug as needed.
Check the carburetor: If the engine is still running poorly after checking the fuel, air filter, and spark plug, there may be a problem with the carburetor. Take it to a qualified technician for diagnosis and repair.

Chain Not Oiling:
Check the oil level: Ensure the oil tank has enough chain oil.
Check the oil filter: A clogged oil filter can prevent the chain from oiling properly. Clean or replace the oil filter as needed.
Check the oil pump: If the oil filter is clean, but the chain is still not oiling, there may be a problem with the oil pump. Take it to a qualified technician for diagnosis and repair.

Chain Binds or Jams:
Check chain tension: If the chain is too tight, it can bind or jam. Adjust the chain tension to the proper specification.
Check chain sharpness: A dull chain can bind or jam. Sharpen the chain or replace it if necessary.
Check guide bar: Make sure the guide bar is not damaged or worn. A damaged guide bar can cause the chain to bind or jam.

If you are unable to resolve the issue using these troubleshooting tips, consult a qualified technician.

Specifications and Features of the MS170

The Stihl MS170 chainsaw is a lightweight and compact power tool designed for a variety of light-duty tasks. Here’s a breakdown of its key specifications and features:

Engine:
Engine Type: Two-stroke gasoline engine
Displacement: Typically around 30;1 cc (cubic centimeters)
Power Output: Approximately 1.7 bhp (brake horsepower) or 1.2 kW (kilowatts)
Fuel Tank Capacity: Around 0.25 liters
Oil Tank Capacity: Around 0.145 liters
Fuel Mix Ratio: 50:1 (gasoline to two-stroke oil)

Cutting Attachment:
Bar Length: Available in various lengths, commonly 14 inches (35 cm) or 16 inches (40 cm)
Chain Pitch: 3/8″ P (Picco)
Chain Gauge: 0.050″ (1.3 mm)
Guide Bar Type: Laminated

Weight:
Weight (Powerhead Only): Approximately 4.1 kg (9.0 lbs)

Features:
STIHL Quickstop Chain Brake System: Designed to stop the chain within fractions of a second in certain kickback situations.
Anti-Vibration System: Helps reduce operator fatigue by minimizing vibrations transmitted from the engine and cutting attachment;
Master Control Lever: Combines choke, start, run, and stop functions into a single, easy-to-use lever.
Ematic Lubrication System: Designed to reduce oil consumption by delivering oil precisely where it’s needed.
Compensator: Maintains a consistent air-fuel mixture as the air filter becomes dirty, helping to maintain engine power.
Side-Access Chain Tensioner: Allows for easy chain adjustment.

Other Specs:
Sound Pressure Level: Typically around 100 dB(A)
Sound Power Level: Typically around 113 dB(A)
Intended Use:
The Stihl MS170 is designed for homeowners and occasional users who need a lightweight and easy-to-use chainsaw for tasks such as:
Cutting firewood: Small logs and branches
Pruning trees: Removing small limbs
General property maintenance: Light clearing and cleanup

Please note that these specifications may vary slightly depending on the specific model and production year of your Stihl MS170. Always refer to your owner’s manual for the most accurate information.

Finding and Downloading the MS170 Owners Manual

Accessing the owner’s manual for your Stihl MS170 chainsaw is essential for safe operation, proper maintenance, and troubleshooting. Here’s a guide on how to find and download the manual:

Stihl’s Official Website:
The primary source for the MS170 owner’s manual is the official Stihl website.
Navigate to the Stihl USA website, or the website for your region.
Use the search function, typically located in the upper right corner, and enter “MS170 owner’s manual” or simply “MS170”.
Look for a direct link to the MS170 product page.
On the product page, there should be a section for “Support,” “Downloads,” or “Manuals.”
Click on the appropriate link to access the available manuals. You may need to select your specific model variation if multiple versions exist.
Download the PDF version of the owner’s manual.

Stihl Dealer Websites:
Many authorized Stihl dealers also provide access to owner’s manuals on their websites.
Visit the website of your local Stihl dealer.
Search for the MS170 chainsaw.
Look for a “Downloads” or “Support” section on the product page.
Download the PDF version of the owner’s manual.

Online Manual Databases:
Several online databases host user manuals for various products, including the Stihl MS170.
Websites like ManualsLib, ManualsOnline, and similar platforms may have the MS170 manual available.
Search for “Stihl MS170 owner’s manual” on these websites.
Download the PDF version of the manual if available.

Customer Support:
If you are unable to find the manual online, contact Stihl customer support directly.
Visit the Stihl website and look for a “Contact Us” or “Support” section.
Call their customer service hotline or send an email requesting the MS170 owner’s manual.
Provide the model and serial number of your chainsaw to ensure you receive the correct manual.

Check Physical Documentation:

If you purchased the MS170 new, the owner’s manual should have been included in the packaging.
Check the box or any accompanying literature that came with the chainsaw.
Tips for Downloading:
Ensure you have a PDF reader installed on your computer or device (e.g., Adobe Acrobat Reader).
Download the manual to a safe and easily accessible location on your device.
Consider printing a copy for convenient reference in your workshop or garage.
Always refer to the official Stihl manual for the most accurate and up-to-date information.