Introduction
This manual provides detailed instructions for the safe and effective operation, maintenance, and troubleshooting of the Stihl MS171 chainsaw. It covers essential information for assembly, starting, cutting techniques, and routine care to ensure optimal performance and longevity. Please read this manual thoroughly before operating the chainsaw.
Safety Instructions
Always prioritize safety when operating the Stihl MS171 chainsaw. Failure to follow safety guidelines can result in serious injury or death. Wear appropriate personal protective equipment (PPE) including a helmet, eye protection, hearing protection, gloves, and protective legwear. Ensure a clear work area and be aware of your surroundings. Never operate the chainsaw under the influence of alcohol or drugs.
- Read the entire manual before use.
- Wear appropriate personal protective equipment (PPE).
- Inspect the chainsaw before each use for damage or loose parts.
- Ensure proper chain tension and sharpness.
- Operate in a well-ventilated area.
- Keep bystanders and animals at a safe distance.
- Never operate with one hand.
- Be aware of kickback hazards.
- Turn off the engine before making adjustments or maintenance.
Setup and Assembly
Before operating your Stihl MS171 chainsaw, proper assembly and preparation are crucial. This section guides you through the initial setup steps.
1. Unpacking
Carefully remove all components from the packaging. Verify that all parts are present according to the packing list. Inspect for any shipping damage.
2. Bar and Chain Installation
- Ensure the engine is off and the chain brake is engaged.
- Remove the chain sprocket cover by loosening the two nuts.
- Place the guide bar onto the studs, ensuring the chain tensioner pin engages with the hole in the bar.
- Carefully fit the saw chain around the sprocket and into the guide bar groove. Ensure the cutting edges face forward on the top of the bar.
- Replace the chain sprocket cover and hand-tighten the nuts. Do not fully tighten yet.
3. Fuel and Chain Oil Filling
The Stihl MS171 uses a specific fuel mixture and chain lubricant. Use Stihl 2-stroke engine oil mixed with high-octane unleaded gasoline at a 50:1 ratio (2% oil). Use only high-quality chain lubricant for the chain oil tank.
- Fuel Tank: Fill with the correct fuel mixture.
- Chain Oil Tank: Fill with chain lubricant.
Always fill tanks on a level surface and wipe up any spills immediately.
Image: Stihl MS171 Chainsaw resting on a pile of cut logs in a backyard setting. This image shows the chainsaw ready for use, highlighting its design and typical operating environment.
Operating Instructions
This section details the steps for starting, operating, and stopping your Stihl MS171 chainsaw safely and effectively.
1. Starting the Engine
- Place the chainsaw on a firm, level surface.
- Engage the chain brake.
- Set the master control lever to the choke position (cold start) or half-throttle (warm start).
- Hold the chainsaw firmly with one hand on the front handle and place your foot through the rear handle.
- Pull the starter cord with a brisk, steady motion until the engine fires briefly.
- Move the master control lever to the half-throttle position.
- Pull the starter cord again until the engine starts and runs.
- Blip the throttle to disengage the half-throttle lock, allowing the engine to idle.
- Disengage the chain brake before cutting.
2. Cutting Techniques
Always maintain a firm grip with both hands. Stand in a balanced position. Plan your cuts to avoid kickback and ensure the log is stable. Start cutting with the chain at full speed.
Image: Person operating a Stihl MS171 Chainsaw to cut a log on a sawhorse, demonstrating proper cutting posture and safety gear.
3. Stopping the Engine
To stop the engine, move the master control lever to the STOP position. Engage the chain brake for safety after the engine has stopped.
Maintenance
Regular maintenance ensures the longevity and safe operation of your Stihl MS171 chainsaw. Perform these tasks routinely.
Daily Maintenance
- Chain Sharpening: Keep the saw chain sharp for efficient and safe cutting.
- Chain Tension: Check and adjust chain tension. The chain should be snug but still able to be pulled around the bar by hand.
- Air Filter: Clean the air filter. Replace if damaged.
- Guide Bar: Clean the guide bar groove and oil holes. Flip the guide bar periodically to ensure even wear.
- Chain Brake: Test the chain brake for proper function.
Weekly Maintenance
- Spark Plug: Inspect and clean the spark plug. Adjust electrode gap if necessary, or replace.
- Cooling Fins: Clean the cooling fins on the cylinder to prevent overheating.
- Fuel Filter: Inspect and clean or replace the fuel filter.
Storage
For long-term storage, drain the fuel tank and run the engine until it stops to clear the carburetor. Clean the chainsaw thoroughly and store it in a dry, secure location.
Troubleshooting
This section addresses common issues you might encounter with your Stihl MS171 chainsaw and provides solutions.
| Problem | Possible Cause | Solution |
|---|---|---|
| Engine does not start | No fuel, incorrect starting procedure, fouled spark plug, clogged fuel filter. | Check fuel level and mixture. Follow starting instructions carefully. Clean or replace spark plug. Clean or replace fuel filter. |
| Engine runs, but chain does not move | Chain brake engaged, clutch issue. | Disengage chain brake. If problem persists, consult a service technician. |
| Poor cutting performance | Dull chain, incorrect chain tension, worn guide bar. | Sharpen chain. Adjust chain tension. Inspect and replace guide bar if necessary. |
| Excessive vibration | Loose components, damaged chain or guide bar. | Check all nuts and bolts for tightness. Inspect chain and guide bar for damage and replace if needed. |
Technical Specifications
| Feature | Specification |
|---|---|
| Model | MS171 |
| Brand | Stihl |
| Bar Length | 35 cm (14 inches) |
| Output Power | 1.4 kW (1.8 HP) |
| Power Source | Fuel Powered (2-stroke gasoline engine) |
| Engine Technology | Reduced Emissions |
| Item Weight | 9.48 lbs |
| Product Dimensions (L x W x H) | 40L x 23.5W x 28H cm |
| GTIN / UPC | 00795711906306 |
Warranty and Support
For warranty information, please refer to the documentation provided at the time of purchase or contact your authorized Stihl dealer. For technical support, service, or genuine Stihl spare parts, please contact your local Stihl service center. Always provide your model number (MS171) and serial number when seeking support.
You can find authorized Stihl dealers and service centers through the official Stihl website: www.stihl.com
