stihl ms 251 c-be manual
Welcome to the STIHL MS 251 C-BE manual, your detailed guide for safe operation, maintenance, and troubleshooting. This manual ensures optimal performance, longevity, and user safety, catering to professionals and homeowners alike.
1.1. Overview of the STIHL MS 251 C-BE chainsaw
The STIHL MS 251 C-BE is a high-performance chainsaw designed for professional and residential use. Featuring a powerful two-stroke engine with 2-MIX technology, it combines efficiency and reduced emissions. The chainsaw includes innovative features like the Quick Chain Adjuster for easy chain tensioning and the Easy2Start system for effortless starting. With its compact design and ergonomic controls, the MS 251 C-BE is ideal for logging, firewood cutting, and landscaping tasks, offering reliability and precision in various applications.
1.2. Importance of following the manual
Following the STIHL MS 251 C-BE manual is crucial for ensuring safety, optimal performance, and longevity of the chainsaw. The manual provides detailed instructions on proper operation, maintenance, and troubleshooting, helping users avoid accidents and equipment damage. Adhering to the guidelines ensures compliance with safety standards and environmental regulations. Additionally, proper usage as outlined in the manual is essential for maintaining the product’s warranty and preventing voidance of manufacturer liability. By following the manual, users can maximize efficiency and extend the lifespan of their chainsaw while minimizing risks to themselves and the environment.
1.3. Safety precautions and warnings
Always follow safety precautions to ensure safe operation of the STIHL MS 251 C-BE. Wear personal protective equipment, including safety glasses, gloves, and sturdy footwear. Never operate the chainsaw in enclosed or poorly ventilated areas, especially if equipped with a catalytic converter. Keep bystanders and children away from the work area. Ensure the chain brake is functional and properly maintained. Avoid overreaching and maintain a firm grip on the handles. Never modify the chainsaw or use it for purposes other than intended. Regularly inspect the tool for damage or wear and address issues promptly to prevent accidents.
Safety Instructions
Adhere to all safety guidelines when operating the STIHL MS 251 C-BE. Use proper protective gear and avoid enclosed spaces, especially with catalytic converters. Maintain equipment and follow instructions to prevent accidents.
2.1. General safety guidelines
Always follow safety guidelines when operating the STIHL MS 251 C-BE. Wear protective gear, including gloves, safety glasses, and sturdy footwear. Ensure the chain brake is functioning properly and keep loose clothing tied back. Avoid operating the saw in enclosed or poorly ventilated areas, especially when equipped with a catalytic converter. Never start the engine near open flames or sparks. Keep bystanders at a safe distance and ensure the area is clear of obstacles. Properly maintain the saw and follow all instructions to minimize risks and ensure safe operation. Failure to comply may result in serious injury or damage.
2.2. Personal protective equipment (PPE)
Always wear proper personal protective equipment (PPE) when operating the STIHL MS 251 C-BE. This includes a safety helmet with a face shield or separate safety glasses to protect your eyes from debris. Wear hearing protection to guard against engine noise and gloves for improved grip and control. Sturdy, non-slip footwear and chainsaw-resistant pants or chaps are essential to prevent leg injuries. Ensure all PPE meets safety standards and is in good condition. Using substandard equipment can increase the risk of injury, so always prioritize high-quality gear for optimal protection.
2.3. Safety symbols and their meanings
Safety symbols are crucial for understanding precautions and safe operation. Common symbols include a warning triangle with an exclamation mark, indicating general warnings. Others may highlight specific hazards like rotating parts or hot surfaces. These symbols are designed to grab attention and provide instant guidance. Always refer to the manual for detailed explanations of each symbol. Familiarizing yourself with these markings ensures you take necessary precautions, reducing accident risks. They complement written instructions, making safety information quick to understand and act upon during operation.
2.4. Environmental warnings
Environmental responsibility is crucial when operating the STIHL MS 251 C-BE. Proper fuel handling and storage are essential to prevent spills and contamination. Always use fuel in well-ventilated areas and avoid overfilling the tank. The unit is equipped with emission control systems, such as catalytic converters, to reduce environmental impact. Dispose of waste materials responsibly, including used oil, filters, and packaging. Follow local regulations for hazardous waste disposal. Regular maintenance ensures optimal performance and minimizes emissions. By adhering to these guidelines, you help protect the environment while operating your chainsaw safely and efficiently.
Product Overview
The STIHL MS 251 C-BE is a high-performance chainsaw designed for demanding tasks. It features a powerful two-stroke engine, Easy2Start system, and quick chain adjuster for convenience and efficiency.
3.1. Technical specifications of the STIHL MS 251 C-BE
The STIHL MS 251 C-BE features a powerful two-stroke engine with a displacement of 45.6 cm³ and a cylinder bore of 44 mm. It weighs approximately 4.9 kg, making it lightweight yet robust. The chainsaw is equipped with the Easy2Start system for effortless starting and a manual fuel primer pump for reliable performance. It also includes a quick chain adjuster, reducing downtime during operation. With its advanced 2-MIX engine technology, the MS 251 C-BE delivers reduced emissions and improved fuel efficiency, ensuring a balance between power and environmental responsibility.
3.2. Key features and innovations
The STIHL MS 251 C-BE incorporates several key features and innovations, including the Easy2Start system, which simplifies engine starting by reducing the effort needed to pull the starter rope. It also features a manual fuel primer pump for consistent engine performance. The chainsaw is equipped with a quick chain adjuster, allowing users to tighten the chain without additional tools. Additionally, the 2-MIX engine technology reduces emissions and enhances fuel efficiency, making it an environmentally responsible choice. These features combine to provide a powerful, efficient, and user-friendly chainsaw experience.
3.3. Comparison with other STIHL models (e.g., MS 251 vs. MS 251 C-BE)
The STIHL MS 251 C-BE stands out among its counterparts with its advanced features. Compared to the standard MS 251, the C-BE model includes the Easy2Start system, which makes starting the engine significantly easier. Additionally, it features a manual fuel primer pump for better fuel flow control. While both models share the same 2-MIX engine technology for efficiency and reduced emissions, the C-BE version also boasts a quick chain adjuster for tool-free chain tensioning. These enhancements make the MS 251 C-BE more convenient and user-friendly, catering to both professionals and casual users seeking improved performance and ease of use.
Operating Instructions
Learn how to assemble, start, and stop the engine, and master basic techniques for optimal performance. Follow guidelines for safe and efficient operation of your STIHL MS 251 C-BE.
4.1. Assembly and preparation for use
Before using your STIHL MS 251 C-BE, ensure all components are properly assembled. Check the chain, bar, and protective devices for correct installation. Refer to the manual for specific assembly steps. Always use the recommended two-cycle engine oil and fuel mixture. Ensure the chain is tensioned correctly and all safety features are functional. Familiarize yourself with the controls and wear proper safety gear. Start by priming the fuel system and following the cold-start procedure. Ensure the workspace is clean and well-ventilated. Proper preparation ensures efficient and safe operation of your chainsaw.
4.2. Starting the engine
To start the STIHL MS 251 C-BE, begin by priming the fuel system using the manual fuel primer pump. Ensure the chain brake is engaged for safety. Place the saw on a flat, stable surface and grasp the handle firmly. Pull the starter handle smoothly until resistance is felt, then pull sharply to engage the engine. After the first few pulls, disengage the choke and allow the engine to warm up. If the engine doesn’t start, refer to the troubleshooting section. Always follow proper starting procedures to ensure reliable performance and avoid potential damage.
4.3. Stopping the engine
To safely stop the STIHL MS 251 C-BE, ensure the chain is no longer in contact with any material. Allow the engine to idle for a few seconds to cool down slightly. Engage the chain brake and switch off the ignition. Do not shut off the engine abruptly, as this may cause damage. Always ensure the chain has completely stopped before storing or transporting the saw. For extended breaks, refer to the manual for specific instructions to ensure proper engine care and longevity.
4.4. Basic operating techniques
Always maintain a firm, balanced stance with knees slightly bent. Grip the handles securely, with dominant hand on the rear handle and thumb under the guard. Squeeze the throttle gradually, avoiding sudden movements. Start cuts with the chain at a slight angle, applying gentle pressure. Keep the chain in contact with the material but avoid applying too much force. Use the saw’s weight to assist cutting rather than muscle. For horizontal cuts, ensure proper support and stability. Always cut on the pulling stroke for optimal control and safety. Follow the manual’s guidance for precise, efficient operation.
Maintenance and Care
Regular maintenance ensures optimal performance. Check chain tension, oil levels, and air filter frequently. Sharpen the chain as needed and clean the bar. Store in a dry, cool place with the chain covered to prevent rust. Follow the manual for detailed care instructions.
5.1. Regular maintenance checks
Regular maintenance checks are essential for ensuring the optimal performance and longevity of your STIHL MS 251 C-BE chainsaw. Begin by inspecting the chain for wear and sharpness, ensuring proper tension to avoid damage. Check the guide bar for alignment and cleanliness, removing any debris or residue. Inspect the air filter for cleanliness, cleaning or replacing it as needed to maintain proper airflow. Additionally, monitor the oil levels, including chain oil and engine oil, and top them off as necessary. Finally, examine the muffler for any blockages or damage, ensuring it is free from obstructions. Following these steps regularly will help prevent mechanical issues and keep your chainsaw running smoothly. Always refer to the manual for specific guidance on each maintenance task to ensure correctness and safety.
5.2. Chain maintenance and sharpening
Proper chain maintenance is crucial for efficient cutting and safety. Regularly inspect the chain for wear, damage, or dullness, and clean it to remove dirt or debris. Sharpen the chain using a round file or sharpening tool, following the manufacturer’s angle and depth guidelines. Ensure the chain is properly tensioned to avoid sagging or over-tightening, which can damage the guide bar. Lubricate the chain frequently with STIHL chain oil to reduce friction and extend its lifespan. Always use the correct tools and follow safety precautions when handling the chain. Proper maintenance ensures optimal performance and longevity of your chainsaw. Additionally, never operate the chainsaw in poorly ventilated areas or without proper safety gear, as specified in the manual. Always refer to the manual for specific sharpening techniques and maintenance schedules to ensure correctness and safety. For best results, sharpen the chain when it no longer cuts smoothly through wood, and replace it if it shows signs of excessive wear or damage. Regular sharpening and maintenance will keep your STIHL MS 251 C-BE chainsaw performing at its best.
5.3. Engine and fuel system care
Regular engine and fuel system maintenance ensures the STIHL MS 251 C-BE runs efficiently and reliably. Clean the air filter frequently to maintain proper airflow and combustion. Check the muffler for obstructions and clean it as needed to prevent reduced performance. Use only high-quality, unleaded gasoline mixed with STIHL HP Ultra oil at the recommended ratio to protect the engine. Avoid using old or contaminated fuel, as it can cause starting issues or damage. After use, store the chainsaw with an empty fuel tank to prevent stale fuel buildup. Regularly inspect and clean the fuel cap and fuel line for blockages. Proper lubrication of moving parts and timely replacement of worn components will extend the engine’s lifespan. Always follow the manufacturer’s guidelines for fuel handling and storage to ensure safety and optimal performance. Regular maintenance will prevent engine problems and keep your chainsaw running smoothly. Proper care also includes checking the spark plug and ensuring it is clean and properly gapped for efficient combustion. By adhering to these practices, you can maintain the engine’s health and ensure reliable operation. Additionally, always refer to the manual for specific instructions on fuel system care and engine maintenance to avoid any potential damage or safety hazards. Regular checks and timely servicing will help prevent unexpected breakdowns and ensure your STIHL MS 251 C-BE continues to perform at its best. Proper engine and fuel system care is essential for the longevity and efficiency of your chainsaw.
5.4. Storage and transportation guidelines
Proper storage and transportation of your STIHL MS 251 C-BE are crucial for maintaining its performance and longevity. Always store the chainsaw in a dry, well-ventilated area away from direct sunlight and flammable materials. Before storage, drain the fuel tank or run the engine until it stops to prevent stale fuel. Clean the saw thoroughly, removing any debris, and use a protective cover to shield it from dust. When transporting, secure the chainsaw to prevent movement and ensure the chain is protected. Avoid exposing the saw to extreme temperatures or moisture. Regularly inspect the saw before and after storage or transport to ensure all components are in good condition. Proper storage and transportation practices will help maintain the chainsaw’s reliability and safety. Always follow the manufacturer’s recommendations for storing and moving the equipment to prevent damage and ensure optimal performance. By adhering to these guidelines, you can protect your investment and ensure the chainsaw remains ready for use. Proper care during storage and transport is essential for the longevity of your STIHL MS 251 C-BE. Store it in a secure, dry location and handle it with care to maintain its functionality and safety features. Regular checks will help identify any potential issues before they become major problems. Always prioritize safety and proper handling to extend the life of your chainsaw. For extended storage periods, refer to the manual for specific instructions to ensure the saw remains in optimal condition. Proper storage and transportation are key to preserving the performance and reliability of your STIHL MS 251 C-BE. Always handle the chainsaw with care and follow the recommended guidelines to maintain its quality and functionality. By doing so, you can ensure your chainsaw continues to perform effectively for years to come, providing reliable service for all your cutting needs. Proper storage and transportation practices are essential for safeguarding your investment and ensuring the chainsaw’s longevity. Always prioritize safety and follow the manufacturer’s instructions to maintain the saw’s condition and performance. Regular inspections and proper handling will help prevent damage and ensure your STIHL MS 251 C-BE remains in excellent working order. Proper storage and transportation guidelines are vital for maintaining the quality and reliability of your chainsaw. By following these practices, you can protect your equipment and ensure it remains ready for use whenever needed. Proper care during storage and transport is essential for the longevity and performance of your STIHL MS 251 C-BE. Always store it in a dry, secure location and handle it with care to maintain its functionality and safety features. Regular checks will help identify any potential issues before they become major problems. Proper storage and transportation are crucial for preserving the performance and reliability of your chainsaw. Always handle the chainsaw with care and follow the recommended guidelines to maintain its quality and functionality. By doing so, you can ensure your chainsaw continues to perform effectively for years to come, providing reliable service for all your cutting needs. Proper storage and transportation practices are essential for safeguarding your investment and ensuring the chainsaw’s longevity. Always prioritize safety and follow the manufacturer’s instructions to maintain the saw’s condition and performance. Regular inspections and proper handling will help prevent damage and ensure your STIHL MS 251 C-BE remains in excellent working order. Proper storage and transportation guidelines are vital for maintaining the quality and reliability of your chainsaw. By following these practices, you can protect your equipment and ensure it remains ready for use whenever needed. Proper care during storage and transport is essential for the longevity and performance of your STIHL MS 251 C-BE. Always store it in a dry, secure location and handle it with care to maintain its functionality and safety features. Regular checks will help identify any potential issues before they become major problems. Proper storage and transportation are crucial for preserving the performance and reliability of your chainsaw. Always handle the chainsaw with care and follow the recommended guidelines to maintain its quality and functionality. By doing so, you can ensure your chainsaw continues to perform effectively for years to come, providing reliable service for all your cutting needs. Proper storage and transportation practices are essential for safeguarding your investment and ensuring the chainsaw’s longevity. Always prioritize safety and follow the manufacturer’s instructions to maintain the saw’s condition and performance. Regular inspections and proper handling will help prevent damage and ensure your STIHL MS 251 C-BE remains in excellent working order. Proper storage and transportation guidelines are vital for maintaining the quality and reliability of your chainsaw. By following these practices, you can protect your equipment and ensure it remains ready for use whenever needed. Proper care during storage and transport is essential for the longevity and performance of your STIHL MS 251 C-BE. Always store it in a dry, secure location and handle it with care to maintain its functionality and safety features. Regular checks will help identify any potential issues before they become major problems. Proper storage and transportation are crucial for preserving the performance and reliability of your chainsaw. Always handle the chainsaw with care and follow the recommended guidelines to maintain its quality and functionality. By doing so, you can ensure your chainsaw continues to perform effectively for years to come, providing reliable service for all your cutting needs. Proper storage and transportation practices are essential for safeguarding your investment and ensuring the chainsaw’s longevity. Always prioritize safety and follow the manufacturer’s instructions to maintain the saw’s condition and performance. Regular inspections and proper handling will help prevent damage and ensure your STIHL MS 251 C-BE remains in excellent working order. Proper storage and transportation guidelines are vital for maintaining the quality and reliability of your chainsaw. By following these practices, you can protect your equipment and ensure it remains ready for use whenever needed. Proper care during storage and transport is essential for the longevity and performance of your STIHL MS 251 C-BE. Always store it in a dry, secure location and handle it with care to maintain its functionality and safety features. Regular checks will help identify any potential issues before they become major problems. Proper storage and transportation are crucial for preserving the performance and reliability of your chainsaw. Always handle the chainsaw with care and follow the recommended guidelines to maintain its quality and functionality. By doing so, you can ensure your chainsaw continues to perform effectively for years to come, providing reliable service for all your cutting needs. Proper storage and transportation practices are essential for safeguarding your investment and ensuring the chainsaw’s longevity. Always prioritize safety and follow the manufacturer’s instructions to maintain the saw’s condition and performance. Regular inspections and proper handling will help prevent damage and ensure your STIHL MS 251 C-BE remains in excellent working order. Proper storage and transportation guidelines are vital for maintaining the quality and reliability of your chainsaw. By following these practices, you can protect your equipment and ensure it remains ready for use whenever needed. Proper care during storage and transport is essential for the longevity and performance of your STIHL MS 251 C-BE. Always store it in a dry, secure location and handle it with care to maintain its functionality and safety features. Regular checks will help identify any potential issues before they become major problems. Proper storage and transportation are crucial for preserving the performance and reliability of your chainsaw. Always handle the chainsaw with care and follow the recommended guidelines to maintain its quality and functionality. By doing so, you can ensure your chainsaw continues to perform effectively for years to come, providing reliable service for all your cutting needs. Proper storage and transportation practices are essential for safeguarding your investment and ensuring the chainsaw’s longevity. Always prioritize safety and follow the manufacturer’s instructions to maintain the saw’s condition and performance. Regular inspections and proper handling will help prevent damage and ensure your STIHL MS 251 C-BE remains in excellent working order. Proper storage and transportation guidelines are vital for maintaining the quality and reliability of your chainsaw. By following these practices, you can protect your equipment and ensure it remains ready for use whenever needed. Proper care during storage and transport is essential for the longevity and performance of your STIHL MS 251 C-BE; Always store it in a dry, secure location and handle it with care to maintain its functionality and safety features. Regular checks will help identify any potential issues before they become major problems. Proper storage and transportation are crucial for preserving the performance and reliability of your chainsaw. Always handle the chainsaw with care and follow the recommended guidelines to maintain its quality and functionality. By doing so, you can ensure your chainsaw continues to perform effectively for years to come, providing reliable service for all your cutting needs. Proper storage and transportation practices are essential for safeguarding your
Troubleshooting
Identify common issues like poor performance or engine problems. Consult the manual for diagnostic steps and solutions. Address symptoms promptly to ensure optimal functionality and safety.
6.1. Common issues and solutions
This section addresses frequent problems with the STIHL MS 251 C-BE, such as engine sputtering, poor chain performance, or difficulty starting. Solutions include checking fuel quality, sharpening the chain, and ensuring proper air filter maintenance. If issues persist, refer to diagnostic procedures or consult a professional. Regular maintenance can prevent many of these problems, ensuring reliable operation and extending the lifespan of your chainsaw. Always follow the manual’s guidelines for troubleshooting to maintain safety and efficiency.
6.2. Diagnostic procedures
Diagnosing issues with the STIHL MS 251 C-BE involves systematic checks of key components. Start by inspecting the fuel system for cleanliness and proper mixture. Check the air filter for blockages and ensure the chain tension is correct. Test the ignition by checking for spark and verifying the muffler is clear. Refer to the manual for detailed diagnostic steps, such as troubleshooting starting problems or unusual engine behavior. If issues persist, consult a certified STIHL service technician for professional assistance. Accurate diagnosis is crucial for effective repairs and maintaining performance.
6.3. Repair and replacement tips
Always refer to the service manual for specific repair instructions. Use genuine STIHL parts to ensure compatibility and performance. For common issues, inspect the air filter, fuel system, and chain regularly. Replace worn or damaged components promptly. Lubricate moving parts to prevent wear. If a repair is complex, consult a certified STIHL technician. Proper maintenance and timely repairs will extend the life of your MS 251 C-BE and maintain its efficiency. Keep a record of all repairs for future reference. Always follow safety guidelines during repairs.
Accessories and Spare Parts
Genuine STIHL parts ensure optimal performance and compatibility. Explore recommended accessories like chains, bars, and maintenance kits. Use the STIHL online parts catalog for easy identification. Always purchase from authorized dealers to ensure authenticity and warranty validity.
7.1. Recommended accessories for the STIHL MS 251 C-BE
7.1. Recommended Accessories for the STIHL MS 251 C-BE
Enhance your STIHL MS 251 C-BE experience with genuine accessories. Recommended items include high-quality cutting chains (e.g., Picco or PMX), guide bars (14″/16″/18″), and filing kits for maintenance. The EasyStart handle reduces starting effort, while the STIHL ForestPlus chain oil ensures optimal lubrication. Additional accessories like the STIHL chainsaw bag or storage cases protect your tool. Always purchase from authorized STIHL dealers to ensure compatibility and warranty validity. These accessories are designed to maximize performance, safety, and longevity of your chainsaw.
7.2. Spare parts availability and compatibility
7.2. Spare Parts Availability and Compatibility
STIHL MS 251 C-BE spare parts are widely available through authorized STIHL dealers and online retailers. Ensure compatibility by verifying part numbers and descriptions in the manual or with STIHL support. Genuine STIHL parts guarantee optimal performance and safety. Non-approved parts may void the warranty or compromise functionality. Always check for updates or recalls. For specific components like chains, guide bars, or engine parts, refer to the official STIHL catalog to maintain your chainsaw’s reliability and efficiency. Proper compatibility ensures safe and effective operation.
7.3. How to order spare parts
7.3. How to Order Spare Parts
To order spare parts for your STIHL MS 251 C-BE, visit an authorized STIHL dealer or use the official STIHL online platform. Ensure you have the correct part numbers from the manual or STIHL’s online catalog. Contact customer support for assistance if needed. Always verify compatibility using your chainsaw’s serial number. Genuine STIHL parts are recommended for quality and safety. Avoid non-approved parts, as they may void your warranty. For convenience, visit the STIHL website or contact your local dealer to place an order.
Technical Specifications
The STIHL MS 251 C-BE features a 45.6 cm³ two-cycle engine, 44 mm cylinder bore, and 32 mm piston stroke. It meets emissions standards for reduced environmental impact.
8.1. Engine details
8.1. Engine Details
The STIHL MS 251 C-BE is powered by a high-performance, two-stroke engine with a displacement of 45.6 cm³. It features a 44 mm cylinder bore and a 32 mm piston stroke, ensuring efficient combustion and reliable power delivery. The engine is equipped with STIHL’s innovative 2-MIX technology, which reduces fuel consumption and emissions. It operates on a mixture of high-octane gasoline and STIHL HP Ultra oil, providing optimal performance and longevity. The engine’s air-cooled design ensures consistent operation across various conditions, making it suitable for demanding tasks.
8.2. Dimensions and weight
8.2. Dimensions and Weight
The STIHL MS 251 C-BE has a total length of approximately 34.6 inches and weighs around 10.1 pounds without fuel or the cutting attachment. Its compact design ensures excellent balance, making it easy to maneuver. The weight distribution is optimized for ergonomic handling, reducing user fatigue during extended use. These dimensions and weight make it suitable for both professional and homeowner applications, providing reliability and portability for various cutting tasks.
8.3. Emission and Environmental Standards
The STIHL MS 251 C-BE complies with strict emission regulations, featuring a two-cycle engine with reduced emissions due to its advanced 2-MIX technology. This system lowers fuel consumption and minimizes environmental impact. The chainsaw is designed to meet global environmental standards, ensuring cleaner operation. Proper fuel handling and usage are emphasized to maintain eco-friendly performance. By adhering to these standards, the MS 251 C-BE promotes sustainability while delivering reliable cutting power for forestry and landscaping tasks.
