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Stihl

stihl br340 420 SR340 420 Service Manual

stihl br340 420 SR340 420 Service Manual

$16.99
$16.99
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Machine data plateRef 59344
Brand
Stihl
Equipment
Lawn & Garden
Models covered
Mistblowers / Sprayers, SR340
Format
PDF, searchable, print-ready
Delivery
Instant download after checkout
Language
English

What happens after you pay

  • Download link opens on the order page immediately
  • The same link is emailed to you — re-download any time
  • Open on phone, tablet or PC; print only the pages you need
  • Not sure it covers your serial range? Ask us before you buy
🏷️ Basic Information
Vehicle Overview
Make:
Stihl
Model:
BR 340, BR 420, SR 340, SR 420
Model Variant:
Backpack Blower (BR), Vacuum/Shredder (SR)
Production Years:
2000-2010 (approximate)
👋 Introduction
Market Position
Target Audience:
Commercial landscapers, municipal grounds crews, and homeowners with large properties
Competitive Advantage:
High air volume and velocity for clearing large areas; Stihl's reputation for durability and dealer support
Key Features:
Powerful 2-stroke engine, ergonomic backpack design, anti-vibration system, large fuel tank for extended runtime
📋 Manual Details
Manual Specifications
Coverage Areas:
Complete service and repair procedures for BR 340, BR 420, SR 340, and SR 420 models
Page Count:
Not specified
Manual Type:
Service and repair manual
Language:
English
Format:
PDF (digital download)
Delivery Method:
Instant download after purchase
📖 Manual Coverage
Systems Covered
Engine:
Disassembly, inspection, repair, and reassembly of the 2-stroke engine
Fuel System:
Carburetor overhaul, fuel pump, fuel lines, and tank maintenance
Ignition System:
Spark plug, ignition coil, and flywheel service
Air Intake:
Air filter cleaning and replacement, intake tract inspection
Lubrication:
Fuel-oil mixture specifications and oil system service
Exhaust:
Muffler inspection and spark arrestor cleaning
Cooling:
Cooling fin cleaning and airflow maintenance
Starter System:
Recoil starter disassembly and repair
Control System:
Throttle trigger, cable, and stop switch service
Harness:
Backpack frame, straps, and padding replacement
Blower Housing:
Impeller removal, housing inspection, and blower tube service
Vacuum Attachment:
SR model vacuum kit installation and shredder blade service
Procedures and Technical Depth
Troubleshooting:
Diagnostic charts for starting issues, poor performance, and unusual noises
Specifications:
Torque values, clearances, and fluid capacities
Wiring Diagrams:
Electrical schematics for ignition and control circuits
Exploded Views:
Illustrated parts breakdowns for assembly reference
Maintenance Schedule:
Routine service intervals and procedures
Parts Information
Part Numbers:
Genuine Stihl part numbers included where applicable
Parts Diagrams:
Visual guides for identifying and ordering components
📊 Manual Specifications
File & Compatibility
File Format:
PDF (searchable, bookmarked, zoomable)
Compatibility:
Windows, macOS, Linux, iOS, and Android — any device with a PDF reader
Requirements:
A PDF reader application (e.g. Adobe Acrobat Reader, free)
Searchability:
Fully text searchable for fast lookup of any topic
Print & Binding
Print Quality:
High-resolution digital pages, printable at full clarity
Binding Type:
N/A — digital download, no physical binding
Paper Type:
N/A — digital download, no physical paper
⚙️ Engine Specifications
Engine Data
Engine Type:
Stihl 2-stroke, single-cylinder, air-cooled
Displacement:
BR 340: 34.4 cc; BR 420: 42.4 cc; SR 340: 34.4 cc; SR 420: 42.4 cc
Power Output:
BR 340: 1.4 kW (1.9 hp); BR 420: 1.8 kW (2.4 hp); SR 340: 1.4 kW (1.9 hp); SR 420: 1.8 kW (2.4 hp)
Fuel System:
Carburetor with manual choke
Fuel Type:
Gasoline-oil mixture (50:1 with Stihl HP Ultra oil)
Ignition:
Electronic magneto ignition
🔧 Transmission
Drivetrain
Standard Transmission:
Direct drive from engine to impeller via centrifugal clutch
Optional Transmission:
Not applicable
Features:
Centrifugal clutch engages at increased engine speed; no gearbox
📐 Dimensions
Exterior Dimensions
Wheelbase:
Not applicable
Length:
BR 340: 500 mm (19.7 in); BR 420: 520 mm (20.5 in) without blower tube
Weight
Curb Weight:
BR 340: 7.9 kg (17.4 lb); BR 420: 8.4 kg (18.5 lb); SR 340: 7.9 kg (17.4 lb); SR 420: 8.4 kg (18.5 lb)
🛡️ Safety Features
Safety Ratings
Crash Test Ratings:
Not applicable
Active Safety
Anti-Vibration System:
Rubber mounts reduce vibration transmitted to operator
Throttle Lockout:
Prevents accidental throttle activation
Passive Safety
Spark Arrestor:
Muffler equipped with spark arrestor screen
Harness:
Padded backpack straps distribute weight and maintain control
💡 Technology Features
Infotainment
Audio System:
Not applicable
Driver Assistance
Controls:
Ergonomic throttle trigger with cruise control lever
🔧 Maintenance
Service Intervals
Air Filter:
Clean every 25 hours; replace as needed
Spark Plug:
Inspect every 50 hours; replace annually
Fuel Filter:
Replace annually
General Inspection:
Before each use and after 50 hours
Fluid Specifications
Fuel Mixture:
50:1 gasoline to 2-stroke oil (ISO-L-EGD or JASO FD)
Oil Type:
Stihl HP Ultra or equivalent
Known Issues / Wear Items
Common Wear Items:
Air filter, spark plug, fuel lines, primer bulb, starter rope
Known Issues:
Carburetor tuning required for altitude; fuel line deterioration over time
📚 Vehicle History
Brand Heritage
Manufacturer:
Andreas Stihl AG & Co. KG
Model Evolution:
Preceded by BR 320/400 series; succeeded by BR 350/430 and later 4-MIX models
Production
Production Location:
Germany (Stihl headquarters) and other Stihl manufacturing facilities
🏆 Awards & Recognition
Recognition
Model Era:
Early 2000s
Awards:
Not specified for this model

Delivery & file format

This is a digital PDF download, not a printed book. After payment the download link appears on your order confirmation page and is emailed to the address you entered. Files open in any PDF reader on phone, tablet or computer and can be printed.

Check the serial range before you buy

Manufacturers change procedures and part numbers by serial-number break. If your data plate shows a serial prefix that is not listed above, contact us with the model and serial number and we will confirm coverage before you order.

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  • Instant download PDF link on your order page and by email right after payment.
  • Secure checkout Encrypted Shopify checkout — we never see your card.
  • Print-ready PDF Searchable text, print the pages you need for the workshop.
  • Phone, tablet, PC Open it in the cab, the workshop or the office.