Stihl MS 261 Instruction Manual

Stihl MS 261 manual cover
Pages 148
Year 2020
Language(s)
English en
Spanish sp

Stihl MS 261 Specification

The Stihl MS 261 is a professional-grade chainsaw designed for efficiency and reliability in demanding forestry and agricultural applications. It is powered by a 50.2 cc, 2-MIX engine that delivers a robust combination of power and fuel efficiency, providing a maximum output of 3.0 kW (4.0 bhp). With a weight of 5.2 kg (11.5 lbs) without fuel, bar, and chain, it offers an excellent power-to-weight ratio, facilitating ease of handling during prolonged use.

The MS 261 features an advanced anti-vibration system, reducing operator fatigue by minimizing vibration levels transmitted to the user's hands and arms. Its ergonomic design includes a comfortable rear handle and a well-balanced body, allowing for better maneuverability and control. The chainsaw incorporates a pre-separation air filtration system that extends the cleaning interval of the air filter, promoting longer service life and reduced maintenance.

Equipped with a side-access chain tensioner, the MS 261 allows for quick and easy adjustments to the chain tension, enhancing operational efficiency. The Ematic lubrication system ensures optimal oil flow to the guide bar and chain, reducing oil consumption by up to 50% compared to conventional lubrication methods. Additionally, the chainsaw features a decompression valve for easier starting and a captive nut on the sprocket cover to prevent the loss of nuts during maintenance.

The Stihl MS 261 is compatible with a range of guide bar lengths from 16 to 20 inches, offering versatility for various cutting tasks. Its reliable performance, coupled with features geared towards user comfort and maintenance simplicity, makes it a preferred choice for professionals seeking a high-performance chainsaw with longevity and ease of use.

Stihl MS 261 F.A.Q.

What is the correct fuel mixture for the Stihl MS 261?

The Stihl MS 261 requires a fuel mixture of 50:1, which is 50 parts gasoline to 1 part 2-stroke engine oil. Use high-quality 2-stroke oil and 89 octane or higher gasoline.

How do I properly start a Stihl MS 261 chainsaw?

To start the Stihl MS 261, ensure the chain brake is engaged, set the master control lever to the starting position, pull the starter rope until the engine fires briefly, then set the lever to the run position and pull again to start.

What should I do if the Stihl MS 261 is hard to start?

Check the air filter, spark plug, and fuel filter for dirt or damage. Ensure fresh fuel is being used and inspect the carburetor settings. Cleaning or replacing these components can improve starting.

How often should I sharpen the chain on my Stihl MS 261?

Sharpen the chain whenever you notice it cutting inefficiently or producing fine sawdust instead of large wood chips. Regular maintenance ensures optimal performance and safety.

What is the recommended bar and chain oil for a Stihl MS 261?

Use Stihl or equivalent bar and chain oil to ensure proper lubrication. The oil should be specifically designed for chainsaws to handle high temperatures and prevent excessive wear.

How do I clean the air filter on my Stihl MS 261?

Remove the air filter cover, take out the filter, and gently clean it using warm, soapy water. Allow it to dry completely before reinstalling. Replace it if it is damaged or excessively dirty.

What maintenance tasks should be performed regularly on the Stihl MS 261?

Regularly check and clean the air filter, inspect and replace the spark plug, clean the cooling fins, and ensure the chain is sharp and properly tensioned. Also, check the fuel and oil levels before each use.

How can I adjust the carburetor on my Stihl MS 261?

Locate the three carburetor adjustment screws labeled H (high speed), L (low speed), and LA (idle speed). Use a screwdriver to adjust them according to the user manual, ensuring optimal engine performance.

Why is my Stihl MS 261 overheating?

Overheating can be caused by a clogged air filter, dirty cooling fins, or improper fuel mixture. Ensure all components are clean and use the correct fuel mix to prevent overheating.

How do I replace the spark plug on my Stihl MS 261?

Disconnect the spark plug wire, remove the old spark plug with a socket wrench, and install a new one. Ensure the gap is set to the manufacturer's specifications before reconnecting the wire.