Stihl FS 36, FS 40, FS 44 Brushcutter Service Manual

Stihl FS 36, 40, and 44 Technical Scope

• This service manual is explicitly tailored for the Stihl FS 36, FS 40, and FS 44 brushcutters, providing detailed component documentation for engine, fuel, ignition, and drive systems.
• Official Stihl publication reference 1112 000 310, documenting service specifications and repair procedures for models manufactured and serviced through July 2004.
• Includes 118 pages of detailed technical content, featuring 85+ exploded-view assembly diagrams and explicit torque-specification tables for light-alloy and polymer-component fasteners.
• Fully searchable PDF text layer allows for rapid lookup of specific torque values, part numbers, or component-adjustment parameters.
• Laid out for standard letter and A4 printing to maintain full legibility of all exploded-view component diagrams and callouts.
• Files are available immediately as a direct download the moment payment clears, with permanent availability in your user account for future retrieval.
• This official edition documents critical adjustments for the breakerless magneto ignition, diaphragm carburetor, and gearhead drive systems unique to these two-stroke brushcutter variants.

Document Structure and Technical Depth

This Stihl FS 36, FS 40, and FS 44 service manual contains a complete breakdown of internal engine components, including crankcase assembly, piston-to-cylinder clearance, and crankshaft bearing maintenance. The documentation further details the ignition timing and magneto systems, with specific troubleshooting charts provided to isolate faults in the fuel supply or combustion circuit. Final sections cover the AV system, cutting tool drive gearhead maintenance, and handle-support ergonomics for various handlebar configurations.

Precision Data and Reference Values

Detailed specifications within this document provide the necessary tolerances for accurate maintenance. The crankcase assembly utilizes a specified tightening torque of 14 Nm (10.3 lbf.ft) for cylinder-to-crankcase fastening, while the clutch-to-crankshaft assembly requires 17 Nm (12.5 lbf.ft). Carburetor adjustment documentation provides baseline settings, including back-off values for the high and low speed screws to ensure engine performance matches operational altitude and load requirements. Spark plug electrode gap is explicitly defined at 0.7–0.8 mm (0.027–0.030 in) for optimal firing. Maintenance schedules and lubrication procedures for the gearhead and drive shaft help maintain tool longevity. This manual documents essential service parameters, including a crankcase leakage test pressure of 0.5 bar (7.25 psi) and a vacuum test threshold of 0.4 bar (5.8 psi) for verifying oil seal integrity.

Reference only — always consult a certified technician before performing service on this equipment.

An official 118-page Stihl OEM service manual covering the FS 36, FS 40, and FS 44 brushcutters, documenting engine, chassis, ignition, and fuel-delivery systems for these specific two-stroke models.