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

Detailed service manual for Stihl SR 320, SR 400, BR 340, BR 420 mist blowers, covering all repair and servicing procedures. Publication No. 0455 373 0123.

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Document Details

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Document Number / Seller:
30212 / Linda Jackson
File Size:
32.93 MB
File Type:
PDF
Language:
English
Printable:
Yes
Category:
Snow Blower
Last updated / verified
Jul 27, 2025

Models Covered & Key Technical Specifications

Stihl Mist Blower Service Manual: Stihl SR 320, SR 400, BR 340, BR 420 Mist Blower Service Parts Manual Factory-Standards

Andreas Stihl AG & Co. (2001-09) Repository | Commercial Reference Archive.

  • Technical Resolution Data: 44.9 cm3 to 56.5 cm3 displacement establishes the primary engine specification Architecture.
  • Specific Temperature Range: For optimal operation, 7000 rpm defines the maximum permissible engine speed Framework.
  • Essential Power Rating: 2.0 kW to 3.5 kW -- signifies the active power output Threshold.
  • Advanced Memory Capacity: The fuel tank capacity requires 1.5 L for standard operation Logic.
  • Core Speed Performance: Maximum throughput reaches 72 m/s to 101 m/s Parameters.
  • Technical Cooling Data: 0.5 bar crankcase leakage test under vacuum indicates the necessary sealing Baseline.

Professional Workshop Service Manual & Technical Specifications

Stihl Mist Blower Service Manual

Model-Designation: Stihl SR 320, SR 400, BR 340, BR 420 Mist Blower // Unit-Designations: Blower, Mistblower // Model-Designation: Air-Cooled Two-Stroke Engine

Document Overview

Assessment-Parameter Operational-Logic Context
Engine Specifications All models Comprehensive list of engine and component data.
Troubleshooting All models Detailed charts for identifying and resolving common faults.
Ignition System All models Procedures for servicing and repair of ignition components.
Rewind Starter All models Maintenance and replacement procedures for the starter mechanism.
Fuel System All models Covers carburetor testing, removal, installation, and adjustment.

Table of Contents Summary

The documentation is partitioned into sections covering engine specifications, troubleshooting, ignition system, rewind starter, fuel system, and control levers.

Special procedures are addressed for carburetor adjustment, ensuring optimal engine performance at various altitudes. Verification procedures are included for ignition system testing and fuel system components like the air filter and fuel hose. Repair information is provided for the rewind starter, including rope and spring replacement. The document includes coverage of control levers and throttle cable adjustments. Brake system specifications are included for ensuring proper safety functionality. Rigorous procedures are outlined for servicing the AV system and blower housing components. The manual documents torque specifications for various fasteners to ensure proper cyclic stress resistance.

Properly requiring comprehensive servicing for your Stihl mist blower or blower, this manual details procedures for carburetor adjustment and fuel system maintenance. Ignition system checks and rewind starter repairs are thoroughly explained. The AV system components and control levers are also covered.

FAQ

Determine the **specific** torque for the muffler screws? keyboard_arrow_down

12 Nm (8.8 Ibf.ft) is required for the muffler screws, and 8 Nm (5.9 Ibf.ft) for the starter cover screws.

What **designated** safety precautions should be taken when working on the ignition system? keyboard_arrow_down

Extreme caution is advised due to high voltages; always check wiring and stop switch are in good condition before assuming ignition module issues.

Check the **critical** lubrication requirements for the starter mechanism. keyboard_arrow_down

STIHL special lubricant is recommended for the rewind spring and starter post before installation to ensure smooth operation.

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Reviews (2)

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Rated 4 out of 5 stars
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This service parts manual is a must-have for anyone working with Stihl mist blowers. The troubleshooting section is particularly helpful. The download process was smooth, and I received my link promptly! Highly recommend!