stihl ms 251 c-be manual
The STIHL MS 251 C-BE is a powerful and versatile chainsaw designed for efficient cutting tasks. Its robust design, easy starting, and comfortable grip ensure optimal performance.
1.1 Overview of the MS 251 C-BE Model
The STIHL MS 251 C-BE is a high-performance chainsaw designed for demanding cutting tasks. It features a powerful 45.6 cm³ engine, delivering 2.2 kW of power. Equipped with the Quick Chain Adjuster and Easy2Start system, it ensures convenient operation. The model also includes a robust 3/8″ chain and bar setup for precise cutting. Its ergonomic design and balanced weight distribution enhance user comfort and control during extended use.
1.2 Importance of the Manual for Safe and Effective Use
The manual is essential for safe and effective operation of the STIHL MS 251 C-BE. It provides critical safety precautions, operating guidelines, and maintenance instructions. Reading and understanding the manual ensures proper use, reduces accident risks, and prolongs the chainsaw’s lifespan. It also outlines reactive forces and proper working techniques, making it indispensable for both novice and experienced users to maximize performance and safety.
Safety Precautions and Guidelines
This section outlines essential safety measures, emphasizing protective equipment, proper handling, and hazard avoidance to ensure safe and efficient operation of the STIHL MS 251 C-BE chainsaw.
2.1 Understanding Pictograms and Symbols on the Machine
Understanding pictograms and symbols on the STIHL MS 251 C-BE is crucial for safe operation. These symbols, located on the machine or in the manual, provide vital information about safety precautions, operation, and maintenance. They include warnings, cautions, and instructions to prevent accidents. Familiarizing yourself with these symbols ensures proper handling and adherence to safety guidelines. Always refer to the manual for accurate interpretations of all pictograms and symbols to avoid misunderstandings and potential hazards during use.
2.2 Essential Safety Equipment for Operation
Operating the STIHL MS 251 C-BE requires essential safety equipment to minimize risks. Wear a helmet, ear protection, safety glasses, and chainsaw chaps. Gloves and steel-toe boots are also recommended. Ensure the chain brake is engaged when starting or transporting the saw. Proper attire and protective gear are critical to prevent injuries. Always use STIHL-approved equipment and follow safety standards to ensure safe and effective operation of the chainsaw.
2.3 Reactant Forces and Their Effects on the Operator
Reactant forces, such as kickback or pull-in, can affect the operator’s control. Kickback occurs when the chain’s upper tip contacts an object, causing the saw to jolt upward. Proper grip and stance are crucial to manage these forces. Always engage the chain brake during startup and transport. Understanding reactant forces helps maintain control and ensures safe operation of the STIHL MS 251 C-BE chainsaw.
Technical Specifications of the STIHL MS 251 C-BE
The STIHL MS 251 C-BE features a 45.6 cm³ engine, delivering 2.2 kW power. It includes a 0;39-liter fuel tank and weighs 4.9 kg, ensuring efficient performance.
3.1 Engine Performance and Power Output
The STIHL MS 251 C-BE is equipped with a high-performance 45.6 cm³ two-stroke engine, delivering 2.2 kW of power at 8,500 RPM. Its advanced design ensures efficient fuel consumption and reduced emissions, making it suitable for demanding tasks. The engine’s robust construction and reliable operation provide consistent performance, while its lightweight design enhances maneuverability and comfort during extended use.
3.2 Fuel Tank Capacity and Consumption Rates
The STIHL MS 251 C-BE has a fuel tank capacity of 0.39 liters, ensuring extended operation between refuels. It operates on a 1:50 mixture of STIHL HP Ultra oil and 95 octane petrol. The chainsaw is designed for efficient fuel consumption, with a rate of approximately 0.45 liters per hour under average workload conditions. Proper fuel management ensures optimal performance and reduces operational costs.
3.3 Chain and Bar Specifications for Optimal Cutting
The STIHL MS 251 C-BE features a 3/8″ Picco Micro Mini chain with a 45 cm bar length for precise cutting. The chain pitch is 1/4″, designed for smooth, efficient cutting in various wood types. The side-access chain tensioning system allows easy adjustments, ensuring optimal performance and safety. Proper chain maintenance and bar alignment are crucial for maximizing cutting efficiency and tool longevity.
Operating the Chainsaw
Ensure proper starting procedures, pre-operation checks, and safe handling. Use the throttle control smoothly, maintain a firm grip, and follow cutting techniques outlined in the manual for optimal performance and safety.
4.1 Starting the Engine and Pre-Operation Checks
Before starting, ensure the chain brake is engaged and the area is clear. Prime the fuel pump, set the choke, and pull the starter rope gently. Perform pre-operation checks, including chain tension, bar condition, and chain brake functionality. Always wear protective gear and ensure the saw is in good working condition. Proper starting and pre-checks ensure safe and efficient operation of the STIHL MS 251 C-BE chainsaw.
4.2 Basic Controls and Functions of the Machine
The STIHL MS 251 C-BE features intuitive controls, including the throttle, choke, and chain brake. The throttle regulates engine speed, while the choke aids in starting. The chain brake ensures safety by stopping the chain in emergencies. Additional functions include the oil tank for chain lubrication and the spark plug for ignition. Familiarize yourself with these components to operate the chainsaw effectively and safely.
4.3 Proper Cutting Techniques and Working Methods
For safe and efficient cutting, maintain proper stance and balance. Plan cuts to avoid obstacles and ensure a clear escape path. Use a sharp chain to minimize effort and reduce kickback risk. Perform horizontal cuts from the underside and vertical cuts with careful control. Keep the saw at full throttle during cuts and avoid overreaching. Always maintain a firm grip and follow the machine’s intended cutting techniques for optimal performance and safety.
Maintenance and Service
Regular maintenance ensures optimal performance and longevity of the STIHL MS 251 C-BE. Clean or replace air filters, check chain tension, and lubricate moving parts as recommended.
5.1 Routine Maintenance Tasks for Prolonged Lifespan
Regular maintenance is crucial for extending the life of the STIHL MS 251 C-BE. Clean the air filter, check chain tension, and inspect the bar for wear. Lubricate the chain and guide bar frequently. Replacement of worn parts and proper storage also contribute to maintaining optimal performance and safety.
5.2 Chain Sharpening and Replacement Guidelines
Regular sharpening of the chain is essential for maintaining cutting efficiency. Use a sharpening tool designed for your chain type, ensuring proper angle and depth. Replace the chain when wear, damage, or excessive stretching occurs. Always follow STIHL’s guidelines for compatible chain specifications to ensure safety and optimal performance.
5.3 Storage and Transportation Best Practices
Store the chainsaw in a dry, well-ventilated area to prevent rust and damage. Ensure the chain is clean and protected. During transport, switch off the engine, engage the chain brake, and attach the scabbard to avoid accidental startup. Always follow local regulations for transporting fuel and equipment to ensure safety and compliance.
Troubleshooting Common Issues
Common issues include engine problems, chain malfunctions, and fuel system concerns. Diagnose by checking fuel levels, air filters, and spark plugs. Address chain issues by sharpening or replacing as needed. Ensure proper fuel mixture and consult the manual for detailed solutions to maintain optimal performance and safety.
6.1 Diagnosing Engine Problems and Solutions
Common engine issues include poor starting, rough running, or complete shutdown. Check fuel quality, mixture, and filter. Ensure proper air filter maintenance and spark plug condition. Muffler blockages or ignition problems can also cause performance issues. Refer to the manual for specific diagnostic steps and solutions. Addressing these problems promptly ensures optimal engine performance and prevents further damage to the chainsaw.
6.2 Resolving Chain and Bar Malfunctions
Chain malfunctions often stem from improper tensioning, dullness, or debris buildup. Regularly check and adjust the chain tension to prevent slippage. Sharpen or replace the chain as needed. Inspect the bar for damage or wear, ensuring proper lubrication. Clean the chain brake and oil holes. Refer to the manual for accurate adjustment and maintenance techniques to restore optimal cutting efficiency and safety.
6.3 Addressing Fuel System Related Concerns
Common fuel system issues include clogged fuel lines, stale fuel, or improper fuel mixtures. Inspect the fuel filter and replace it if dirty. Ensure the fuel cap is venting properly to prevent vacuum lock. Use fresh, correctly mixed fuel to avoid engine problems. Consult the manual for guidance on diagnosing and cleaning the fuel system to maintain optimal performance and prevent costly repairs.
Environmental Considerations
The STIHL MS 251 C-BE features eco-friendly designs, such as reduced emissions and efficient fuel consumption. Always follow responsible waste disposal practices and adhere to environmental regulations.
7.1 Eco-Friendly Features of the MS 251 C-BE
The STIHL MS 251 C-BE incorporates eco-friendly features such as reduced exhaust emissions and improved fuel efficiency. Its advanced engine technology minimizes environmental impact while maintaining high performance. The chainsaw is designed to meet strict emission standards, ensuring responsible use in various environments. Additionally, the machine’s efficient fuel system helps reduce waste and promotes sustainable forestry practices.
7.2 Responsible Use and Waste Disposal Practices
Proper disposal of waste materials from the MS 251 C-BE is essential for environmental protection. Users should dispose of old chains, bars, and fuel responsibly, adhering to local regulations. Recycling options for metal components can reduce environmental impact. Additionally, regular maintenance and correct handling of hazardous materials ensure eco-friendly operation. Always consult local guidelines for appropriate waste management and recycling practices.
Warranty and Support Information
STIHL offers comprehensive warranty coverage and dedicated customer support for the MS 251 C-BE. Contact authorized dealers for assistance, repairs, and genuine parts replacement.
8.1 Understanding the Warranty Terms and Conditions
The STIHL MS 251 C-BE warranty covers defects in materials and workmanship for a specified period. Conditions include proper use, maintenance, and compliance with guidelines. Warranty voids if altered or misused. Original purchase receipt required for claims. Always consult the manual or contact STIHL dealers for detailed terms and regional variations. Regular maintenance ensures coverage validity.
8.2 Contacting STIHL Dealers for Assistance
For inquiries, repairs, or support, contact authorized STIHL dealers. They provide expert advice, genuine parts, and warranty service. Visit the official STIHL website to locate a dealer near you; Ensure to have your model number (MS 251 C-BE) and purchase details ready for efficient assistance. Dealers offer guidance on maintenance, troubleshooting, and accessory recommendations, ensuring optimal performance of your chainsaw. Regularly updated manuals and resources are also available online for user convenience.
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