STIHL MS 261 Chainsaw Service Manual

Technical Scope and Service Data for the 2010 STIHL MS 261

• Covers 2010 STIHL MS 261 and MS 261 C chainsaws, documenting diagnostic and service procedures for both standard and specialty variants
• Official OEM publication © 2010 ANDREAS STIHL AG & Co. KG, revision May 2010
• Contains 125 technical illustrations, 35+ exploded-view assembly diagrams, and 3 comprehensive troubleshooting flow charts for ignition and lubrication systems
• Detailed torque-specification table provides precise values for over 50 assembly points across the engine and chassis
• Files are available immediately after purchase as a direct download to your account
• Page layout is optimized for standard letter and A4 printing
• Indexed PDF structure allows for cross-reference lookup via the built-in search tool
• This 2010-05 edition documents the specific diagnostic requirements for the 50.2 cc engine platform and the integration of QuickStop Super braking systems

Component and System Documentation

This factory service publication provides detailed guidance for the maintenance and repair of the STIHL MS 261 power unit. The documentation spans critical sub-assemblies including the engine cylinder and crankshaft, the clutch and brake systems, the fuel supply and carburetor setup, and the rewind starter mechanism. Each section segments the unit into manageable service chapters, outlining the removal and installation of components such as the handlebar, AV system, control levers, and the dedicated heating system for specialized models. The manual also details the use of specific service tools, including the assembly stand 5910 890 3101 and various bearing and seal installation sleeves.

Technical Specifications and Calibration

Specifications documented in this guide cover engine performance parameters, ignition timing, and lubrication system flow rates. The engine idle speed is specified at 2,800 rpm in the engine data section. Ignition module air gap is maintained at 0.20 mm (+ 0.1/- 0.05 mm) according to the specifications table. Lubrication system oil pump flow is documented at 11.5 cm3/min at 10,000 rpm for maximum setting. The manual lists specific tightening torques for critical components, such as the 50 Nm specification for the carrier-to-crankshaft connection. An official 335-page STIHL OEM workshop manual covering the 2010 MS 261, documenting engine, chassis, electrical, and fuel system specifications for the professional-grade 50.2 cc chainsaw.