Common Stihl MS 391 problems include starting difficulties and chain oiler malfunctions. Users also report issues with the saw’s power and idling stability.
The Stihl MS 391 chainsaw, while a robust and efficient tool for heavy-duty cutting tasks, occasionally suffers from problems that can hinder its performance. Users and professionals alike have noted a few recurring issues with this model, such as complications with getting the engine to start or an unpredictable idle that complicates handling.
Additionally, the chainsaw’s oiling system, vital for chain lubrication, has at times been a point of concern, either dispensing too much oil or not enough, leading to premature wear of the chain. These challenges, despite being manageable, require prompt attention to ensure the longevity and reliable function of the chainsaw in a variety of working conditions.
About Stihl Ms 391 Chainsaw
The Stihl MS 391 is a reliable and efficient chainsaw designed for rugged use. It shines in both home and professional settings, making it a preferred choice for many. With its power and durability, tackling big cutting jobs becomes a manageable task. Let’s explore what makes this model stand out.
Overview of Stihl Ms 391 Features
The MS 391 comes brimming with features that enhance performance and user experience:
- Engine Power: High output with fuel efficiency.
- Pre-Separation Air Filtration: Extends filter life.
- Anti-Vibration System: Reduces user fatigue.
- Tool-Free Fuel and Oil Caps: For easy refills.
- Side-Access Chain Tensioner: Simplifies adjustments.
Popularity and Typical Usage Scenarios
The MS 391 chainsaw is highly regarded among forestry professionals and homeowners alike. Its versatility allows it to perform superbly across various scenarios:
| Usage Scenario | Popularity |
|---|---|
| Firewood Cutting | High |
| Property Maintenance | High |
| Tree Felling | Moderate |
| Storm Clean Up | Moderate |
Common Challenges Encountered With Stihl Ms 391
Stihl MS 391 chainsaws are powerful tools for any lumbering activity. They boast efficiency and ease of use. Yet, users might face challenges that can impact their cutting tasks. This section dives into common issues many encounter with their Stihl MS 391.
Starting Issues and Troubleshooting
Trouble with starting the MS 391 causes frustration. Simple checks often resolve most issues.
- Fuel check: Ensure the tank is full with fresh fuel.
- Spark plug: A dirty or worn-out spark plug may need replacement.
- Air filter: A clogged filter restricts air, so clean or replace it.
- Carburetor: Adjustments might be necessary if the engine doesn’t start smoothly.
Follow these steps for a check. If the saw still won’t start, seek a professional’s help.
Performance Inconsistencies During Operation
Inconsistent performance during use is another common challenge.
- Inspect the chain tension. It should be neither too tight nor too loose.
- Check for bar damage. A bent or worn bar affects the cut.
- Ensure the lubrication system works.
By addressing these points, smooth operation can be ensured.
Maintain the saw regularly to avoid these problems. Proper care extends your chainsaw’s life.
Mechanical and Maintenance Issues
For many, the Stihl MS 391 chainsaw stands as a reliable tool for heavy-duty work. Yet, mechanical and maintenance challenges can sometimes lessen its effectiveness. Understanding common issues can help users to keep their tool in top condition, ensuring optimal performance during every use.
Wear and Tear of Chain and Guide Bar
A well-functioning chain and guide bar are crucial for the smooth operation of your Stihl MS 391. Wear and tear in these parts can cause various problems:
- Decreased cutting efficiency from dull or damaged chains.
- Excessive vibrations from an unbalanced chain.
- Increased risk of kickback due to improper tension.
Regular inspections and timely replacements ensure your chainsaw remains safe and effective.
Engine Maintenance and Carburetor Problems
The engine is the heart of the Stihl MS 391. Neglecting its care leads to performance troubles. Pay special attention to these:
| Engine Issue | Cause | Solution |
|---|---|---|
| Hard starting | Fuel mix or carburetor imbalance | Clean carburetor, adjust mixture |
| Irregular idling | Dirty air filter or clogged fuel line | Replace air filter, clean fuel line |
| Loss of power | Spark plug or exhaust port issues | Check and replace spark plug, clean exhaust |
Proactively addressing engine maintenance prevents downtime and preserves the chainsaw’s lifespan. A well-maintained carburetor, free from dirt and debris, ensures your Stihl MS 391 operates at its best.
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Operational Difficulties Specific to the Stihl Ms 391
The Stihl MS 391 is a powerful chainsaw renowned for its efficiency and durability. Nonetheless, like any machine, it encounters specific operational issues. Users report challenges that can hinder the performance and longevity of their equipment. It is critical to understand these difficulties to maintain the saw’s condition and ensure safe operation.
Vibration and Handling Discomfort
Prolonged use of chainsaws can lead to vibration-related discomfort. The Stihl MS 391 is no exception. Users often experience vibration discomfort, impacting handling and control. The saw contains anti-vibration systems designed to minimize this issue. Users should consistently check these systems to maintain optimal comfort levels. When ignored, excessive vibration can lead to fatigue and long-term hand-arm vibration syndrome (HAVS).
- Regular maintenance of the anti-vibration system
- Secure grasping of the handles
- Utilization of gloves designed to dampen vibration
Overheating and the Risk of Potential Damage
The Stihl MS 391 may overheat due to various factors, including extended use, insufficient lubrication, or debris buildup. Overheating is a critical concern as it can cause engine damage and decrease the chainsaw’s lifespan. To prevent overheating, users must ensure adequate chain oil levels and clean air filters.
| Preventive Measure | Brief Description |
|---|---|
| Proper Lubrication | Ensure chain oil reservoir is filled |
| Clean Air Filters | Remove and clean air filters regularly |
| Avoid Continuous High-Speed Operation | Limit high-speed cuts to prevent overheating |
Remember, proper maintenance is key to solving operational difficulties. It ensures the Stihl MS 391 remains a reliable tool for all cutting needs.
Troubleshooting and Repair Tips
Owning a Stihl MS 391 chainsaw comes with the responsibility of maintenance and repairs. Even the sturdiest tools encounter problems, but don’t worry. This segment offers troubleshooting and repair tips to keep your chainsaw running smoothly. From maintaining your saw at home to seeking professional assistance, you’ll find ways to tackle common issues.
DIY Maintenance Best Practices
- Regularly clean the air filter to prevent clogging and overheating.
- Inspect the spark plug for wear and replace it as needed.
- Ensure the fuel mix is correct to avoid engine problems.
- Check the chain tension before each use for optimal cutting.
- Use a sharpening kit to maintain a sharp chain.
Seeking Professional Repair Services
For complex issues, rely on certified professionals. The Stihl MS 391 may experience problems beyond DIY fixes. Chain tension failures, engine troubles, or hard starts might require an expert’s eye. Authorized service centers provide specialized skills and guarantees that DIY cannot.
| Problem | DIY | Professional Help |
|---|---|---|
| Dirty air filter | Clean or replace | Rarely needed |
| Worn spark plug | Replace spark plug | If issue persists |
| Incorrect fuel mix | Adjust fuel ratio | Consult if smoking |
| Loose chain | Adjust tension | Seek help if chronic |
| Dull chain | Sharpen the chain | Get professional sharpening |
Preventive Measures and Best Practices
Keeping your Stihl MS 391 chainsaw at peak performance involves some simple yet essential steps. By adopting routine maintenance and proper storage, you can prevent common issues and extend your saw’s lifespan.
Routine Maintenance Schedule
Maintaining your chainsaw is key to its longevity.
- Check the chain tension before each use.
- Clean the air filter regularly to prevent blockages.
- Replace the spark plug annually for consistent performance.
- Inspect the fuel filter and replace if needed.
- Keep the chainsaw blade sharp to ensure clean cuts.
| Maintenance Task | Frequency |
|---|---|
| Chain Sharpening | After 10 hours of use |
| Oil System Check | Monthly |
| Air Filter Clean | Every 5 hours of use |
Proper Storage and Handling to Prolong Lifespan
Storage and handling are just as important as maintenance.
- Store in a clean, dry place, away from moisture.
- Empty the fuel tank for long-term storage.
- Engage the chain brake when not in use.
- Use a protective cover to shield the chain.
Remember: A well-maintained chainsaw is a durable chainsaw. Follow these steps to ensure your Stihl MS 391 runs smoothly for years to come.
FAQs of Stihl Ms 391 Problems
What Is the Problem With the Stihl Ms 391 Chainsaw?
The Stihl MS 391 chainsaw can face issues such as difficulty starting, inconsistent idling, and power loss. Regular maintenance and proper fuel mix can mitigate these problems.
Is the Ms 391 a Good Saw?
The MS 391 is a robust and efficient chainsaw, highly regarded for its power-to-weight ratio, making it ideal for demanding cutting tasks. Its reliability and performance receive positive reviews from professionals and homeowners alike.
How Big of a Bar Can You Put on a Stihl Ms 391?
The Stihl MS 391 chainsaw can accommodate a guide bar ranging from 16 inches to 25 inches in size.
What Does Ms Stand For on a Stihl?
“MS” on a STIHL product stands for “MotorSäge,” which translates to “chainsaw” in German, denoting their range of chainsaws.
Conclusion
Understanding the common issues with the Stihl MS 391 chainsaw helps owners maintain their tools effectively. From addressing ignition troubles to fuel system maintenance, a proactive approach can prevent downtime. Keep your MS 391 running smoothly with regular care and swift problem-solving.
Remember, well-maintained equipment is key for optimal performance. Got a minute? Spend it wisely at Chainsaw Hive’s Knowledge section, where chainsaw wisdom never ends.
