Stihl Mist Blower SR 320, SR 400, BR 340, BR 420 Service Manual

Inside the Stihl BR 320, BR 400, SR 320, and SR 400 Service Manual

• Built for owners and workshops servicing the Stihl BR 320, BR 400, SR 320, and SR 400 mistblowers and blowers
• Original OEM publication, Andreas Stihl AG & Co. 2001-09 edition
• Contains 47 exploded-view diagrams and 18 technical troubleshooting flow charts
• Delivered as a direct download the moment payment clears
• Indexed PDF search covers every chapter and appendix
• This 76-page manual is the master reference for the 2001 production run, documenting the transition between early-production models with spacer washers and later-production units featuring modified crankcase mounting bosses

Component and Assembly Documentation

The Stihl BR 320 and SR 320 service manual details engine overhauls, including piston and cylinder removal, crankcase sealing procedures, and ignition system calibration. Chapters provide guidance on internal engine architecture, covering two-part crankshaft assembly, needle cage bearing specs, and fuel system maintenance. The document sections address carburetor adjustments, testing procedures for crankcase airtightness using vacuum and pressure tools, and rewind starter repairs for rope and spring components.

Technical Specification Highlights

This publication provides comprehensive maintenance reference values for the Stihl BR 420 series and associated units. Engine displacement for the 320/340 models is documented at 44.9 cm³, while the 400/420 range reaches 56.5 cm³. Torque values for critical fasteners are specified in a dedicated section, such as the 25 Nm specification for the flywheel nut. Ignition module coil resistance for primary circuits is listed at 0.8–1.3 ohms in the ignition system table. Detailed fluid flow rates for the spraying attachment are listed for various metering knob positions, with ranges from 0.25 l/min to 3.6 l/min provided in the reference tables.

Note: This document provides technical specifications and component identification. All service data shown here is for reference only — qualified technicians and the original OEM documentation remain the authoritative source for any hands-on work. This official 76-page Stihl workshop manual covers the BR 320, BR 400, SR 320, and SR 420, documenting engine, fuel, ignition, and spraying system specifications for the 2001-series product line.