Stihl BF-MM Yard Boss Instruction Manual

Pages 40

Year 2018

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Stihl BF-MM Yard Boss Specification

The Stihl BF-MM Yard Boss is a versatile and compact multi-task tool designed for efficient soil cultivation and aeration. It features a robust 27.2 cc air-cooled, two-cycle engine, delivering reliable performance for a variety of gardening and landscaping tasks. The engine is engineered for easy starting and reduced emissions, adhering to stringent environmental standards.

Equipped with a lightweight yet durable frame, the BF-MM Yard Boss ensures user comfort and maneuverability. Its ergonomic design includes an adjustable handle to accommodate different user heights and preferences, enhancing control and reducing operator fatigue during extended use. The tool's compact size allows for easy navigation in tight spaces, making it ideal for small gardens and flower beds.

The BF-MM model comes with a pick tines attachment, specifically designed for breaking up tough soil and clay, improving soil aeration and preparation for planting. The tines are made from high-quality steel, ensuring longevity and resistance to wear. The quick-release coupling system provides seamless switching between various attachments, expanding the tool's functionality to include edging, dethatching, and sweeping with additional accessories.

Maintenance is straightforward, with easy access to the air filter and spark plug, ensuring the machine remains in optimal working condition. The Stihl BF-MM Yard Boss is a perfect blend of power, versatility, and ease of use, catering to both amateur gardeners and professional landscapers looking for a reliable solution to their ground cultivation needs. Its compact design and multi-functionality make it an essential tool for maintaining healthy, well-aerated soil in various gardening scenarios.

Stihl BF-MM Yard Boss F.A.Q.

How do I properly start the Stihl BF-MM Yard Boss?

To start the Stihl BF-MM Yard Boss, ensure the power switch is in the 'On' position. Prime the engine by pressing the primer bulb several times until fuel is visible. Set the choke lever to the cold start position, then pull the starter rope briskly until the engine fires. Move the choke to the run position after starting.

What should I do if the engine won't start?

If the engine won't start, check the fuel level and ensure it is fresh. Verify that the spark plug is clean and properly gapped. Also, ensure the air filter is clean. If all checks are satisfactory, consider consulting a Stihl service technician.

How often should I perform maintenance on the Yard Boss?

Regular maintenance should be performed after every 25 hours of operation or at least once per season. This includes cleaning the air filter, checking the spark plug, and inspecting the tines for wear or damage.

What type of fuel should be used in the Stihl BF-MM Yard Boss?

Use a high-quality, unleaded gasoline with a minimum octane rating of 89, mixed with Stihl 2-cycle engine oil at a ratio of 50:1. Avoid using fuel with more than 10% ethanol.

How can I clean the air filter on my Yard Boss?

To clean the air filter, remove the filter cover and take out the filter. Wash it in warm, soapy water, rinse, and allow it to dry completely. Apply a few drops of Stihl air filter oil before reinstalling.

What is the recommended way to store the Yard Boss during the off-season?

For off-season storage, clean the machine thoroughly. Drain the fuel tank and run the engine until it stops. Remove and clean the spark plug, and apply a few drops of oil into the cylinder. Pull the starter rope to distribute the oil. Store the unit in a dry, sheltered location.

How do I replace the tines on the Yard Boss?

To replace the tines, ensure the engine is off and cool. Remove the retaining screws or bolts from the tines, then slide them off the shaft. Attach new tines by reversing the removal process and ensure they are securely fastened.

What should I do if my Yard Boss is vibrating excessively?

Excessive vibration can be caused by damaged or unbalanced tines. Inspect the tines for damage or debris. Ensure they are properly attached and balanced. If the issue persists, consult a service technician.

Can I use my Yard Boss for edging tasks?

Yes, the Yard Boss can be used for edging when equipped with the appropriate attachment. Ensure you have the correct edging tool installed and follow the manufacturer's instructions for operation.

How do I adjust the carburetor on my Yard Boss?

Carburetor adjustments should be made only if necessary and preferably by a qualified technician. If adjustment is needed, locate the adjustment screws and follow the service manual's instructions for fine-tuning.