Welcome to the Stihl MS 251 C BE manual, your comprehensive guide to understanding and operating this powerful chainsaw. This manual provides essential information on safety, features, and maintenance to ensure optimal performance and longevity of your tool.
1.1 Overview of the Stihl MS 251 C BE Chainsaw
The Stihl MS 251 C BE is a high-performance chainsaw designed for demanding tasks. It features a powerful engine, lightweight design, and advanced safety features, making it ideal for professionals and homeowners alike. Its ergonomic build ensures comfort during extended use, while its robust construction guarantees durability in challenging environments.
1.2 Importance of Reading the Manual
Reading the manual is crucial for understanding the Stihl MS 251 C BE’s features, safety precautions, and maintenance requirements. It ensures proper operation, reduces accident risks, and helps maximize the chainsaw’s performance and lifespan. Familiarizing yourself with the guidelines is essential for troubleshooting and warranty compliance.
Key Features and Technical Specifications
The Stihl MS 251 C BE features a powerful engine, advanced cooling system, and durable construction, ensuring high performance and reliability for demanding cutting tasks and long-term use.
2.1 Engine Power and Performance
The Stihl MS 251 C BE is equipped with a robust 2.2 kW engine, delivering high torque and consistent power. Its advanced combustion system ensures efficient fuel consumption and reduced emissions, making it suitable for heavy-duty cutting tasks while maintaining environmental responsibility and operational efficiency.
2.2 Weight and Ergonomic Design
The Stihl MS 251 C BE weighs approximately 4.9 kg (10;8 lbs), designed for balanced handling. Its ergonomic design features a comfortable handle and reduced vibration, minimizing operator fatigue. This lightweight and user-friendly structure enhances maneuverability, making it ideal for extended use in various cutting applications while ensuring precise control and comfort.
2.3 Safety Features and Components
The Stihl MS 251 C BE is equipped with a chain brake for emergency stopping and a protective bar to prevent kickback. It also features a spark arrestor to reduce fire hazards. These components work together to enhance operator safety, ensuring secure handling and minimizing risks during operation.
Assembly and Preparation
Proper assembly and preparation are crucial for safe and efficient operation. This section guides you through unpacking, initial inspections, and essential setup steps for your chainsaw.
3.1 Unpacking and Initial Inspection
Begin by carefully unpacking your Stihl MS 251 C BE chainsaw. Inspect all components for damage or wear. Ensure the guide bar, chain, and other accessories are included and undamaged. Familiarize yourself with each part before proceeding to assembly. This step ensures a safe and smooth setup process.
3.2 Attaching the Guide Bar and Chain
Align the guide bar with the chainsaw’s mounting studs. Secure it using the provided screws, ensuring a tight fit. Next, loop the chain around the sprocket, leaving proper tension. Attach the chain to the guide bar, adjusting the tension to specifications. Double-check alignment and fit before use for optimal performance.
3.3 Fueling and Lubrication Guidelines
Use a 50:1 fuel-to-oil ratio for the Stihl MS 251 C BE. Fill the tank with fresh fuel mixture, ensuring no contamination. Lubricate the chain regularly with Stihl chain lube. Proper lubrication prevents wear and overheating. Always refer to the manual for precise fuel and oil specifications to maintain performance and longevity.
Operating Instructions
Follow safe practices when operating the Stihl MS 251 C BE. Ensure proper grip, balance, and control. Always maintain a firm stance and follow guidelines for optimal performance and safety.
4.1 Starting the Chainsaw
To start the Stihl MS 251 C BE, ensure the chain brake is engaged and the saw is on a flat surface. Prime the engine by pressing the primer bulb several times. Set the choke to the start position, pull the starter handle firmly until the engine ignites. Allow it to warm up briefly before use.
4.2 Basic Cutting Techniques
Start with proper stance, feet shoulder-width apart, and a firm grip. Keep the chain at a slight angle, aligning it with the cutting direction. Apply steady, controlled pressure, maintaining balance and control throughout the cut. Avoid applying too much pressure, which can cause binding or loss of control.
4.4 Safe Handling and Control
Always maintain a firm, proper grip on the handles, keeping your body balanced and away from the cutting area. Avoid loose clothing and ensure a clear workspace. Keep the chainsaw at a comfortable cutting height to maintain control. Never reach across the saw or cut in awkward positions that could compromise balance.
Maintenance and Servicing
Regular maintenance ensures optimal performance and longevity of your Stihl MS 251 C BE chainsaw. Follow the recommended schedule for chain sharpening, air filter cleaning, and spark plug checks to maintain efficiency and safety.
5.1 Regular Maintenance Schedule
A well-structured maintenance schedule is crucial for the Stihl MS 251 C BE. Daily checks include chain tension and bar lubrication. Weekly, inspect the air filter and spark plug. Every 50 hours, clean or replace the air filter and check the muffler. Annually, replace the spark plug and inspect the chain brake.
5.2 Chain Sharpening and Replacement
Regular chain sharpening ensures optimal cutting performance. Use a sharpening stone or file, maintaining the recommended angle and depth. Replace the chain when worn or damaged. Always fit a genuine Stihl chain, ensuring proper fitment and alignment with the guide bar for safe and efficient operation.
5.3 Air Filter and Spark Plug Cleaning
Regular cleaning of the air filter and spark plug is essential for maintaining engine performance. Use compressed air to remove debris from the air filter, and clean or replace the spark plug as recommended. Proper maintenance ensures efficient combustion, reducing emissions and improving overall chainsaw functionality. Always refer to the manual for specific instructions.
Troubleshooting Common Issues
This section helps identify and resolve common problems with the Stihl MS 251 C BE. From engine issues to cutting performance, find solutions to keep your chainsaw running smoothly.
6.1 Engine Not Starting
If the engine fails to start, check the fuel level, air filter, and spark plug. Ensure the chain brake is disengaged and the choke is properly adjusted. Verify there are no blockages in the fuel line or carburetor. Refer to the manual for detailed restart procedures and troubleshooting steps to resolve the issue quickly.
6.2 Poor Cutting Performance
Poor cutting performance may result from a dull or loose chain, incorrect chain tension, or misaligned guide bar. Check the chain sharpness, tension, and lubrication. Ensure the guide bar is properly aligned and free from damage. Refer to the manual for chain sharpening and adjustment procedures to restore optimal cutting efficiency and precision.
6.3 Vibration and Noise Problems
Vibration and noise issues may arise from improper chain tension, an unbalanced chain, or loose components. Check the chain for damage or wear and ensure all parts are securely tightened. Refer to the manual for guidance on chain maintenance and adjustment to minimize vibration and reduce operational noise effectively.
Safety Precautions and Best Practices
Always follow safety guidelines when operating the Stihl MS 251 C BE. Ensure proper use of protective gear, inspect equipment regularly, and maintain a safe working environment to prevent accidents.
7.1 Personal Protective Equipment (PPE)
Wearing proper PPE is crucial when operating the Stihl MS 251 C BE. This includes safety glasses, ear protection, gloves, and sturdy boots. Always use a helmet or hard hat to protect against falling debris. Ensure all gear meets safety standards for optimal protection during operation.
7.2 Working in Hazardous Environments
When operating the Stihl MS 251 C BE in hazardous environments, assess the area for potential risks like loose debris or uneven terrain. Ensure good visibility and avoid slippery surfaces. Be cautious near flammable materials and use proper cutting techniques to minimize accident risks.
Always shut off the engine in dangerous conditions for safety.
7.3 Storing the Chainsaw Properly
Store the Stihl MS 251 C BE in a clean, dry place away from direct sunlight. Remove the chain and store it separately to prevent rust. Drain fuel before long-term storage and use a protective cover to shield from dust. Keep out of reach of children and avoid extreme temperatures or humidity.
Warranty and Customer Support
Understand your warranty coverage, contact Stihl customer service for inquiries, and locate authorized service centers for professional assistance and genuine replacement parts.
8.1 Understanding the Warranty Terms
Understand your warranty coverage, including duration and scope, to ensure proper maintenance and repairs. Registration may be required, and adherence to guidelines is crucial for validity. Exclusions apply for misuse or unauthorized modifications. Always consult the manual or contact customer support for clarification on warranty-related inquiries.
8.2 Contacting Stihl Customer Service
For assistance, visit the official Stihl website and use the contact form or call the provided phone number. Customer service is available to address inquiries, provide support, and guide you through troubleshooting. Ensure to have your product details ready for efficient assistance.
Visit www.stihl.com for more information.
8.3 Locating Authorized Service Centers
To find an authorized Stihl service center near you, visit the official Stihl website and use the dealer locator tool. Enter your location to find certified professionals who can service your MS 251 C BE with genuine parts and expert care. Visit www.stihl.com for accurate results.
9.1 Summary of Key Points
9.2 Maximizing Chainsaw Lifespan
To maximize the lifespan of your Stihl MS 251 C BE chainsaw, perform regular maintenance. Sharpen the chain, clean the air filter, and inspect the spark plug regularly. Store it in a dry place, use proper fuel, and avoid overheating; Follow manufacturer guidelines for lubrication and ensure all parts are secure.
9.3 Staying Updated with Manufacturer Guidelines
Regularly check the Stihl website for software updates and service bulletins. Annual updates ensure your chainsaw meets the latest safety and performance standards. Follow manufacturer recommendations for maintenance and repairs. Subscribe to Stihl newsletters for new guidelines and technical advancements, ensuring optimal performance, compliance, and longevity of your tool.