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Stihl BR 420 User Manual

Stihl BR 420
74 pages
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Instruction Manual
Manual de instrucciones
Warning!
For safe operation follow all safety
precautions in Instruction Manual - improper
use can cause serious injury.
Advertencia!
Para su seguridad durante el manejo de este
producto, siga siempre las precauciones de
seguridad dadas en el manual de
instrucciones - el uso indebido puede causar
lesiones graves.
STIHL BR 340, 420
BA_BR340_30_U_D3.book Seite 0 Donnerstag, 27. März 2003 11:49 11
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Stihl BR 420 Specifications

General IconGeneral
Engine Displacement56.5 cc
Air Velocity75 m/s
Air Volume1260 m³/h
Weight8.7 kg
Blower TypeBackpack
Engine Type2-stroke
Power output2.6 kW
Displacement56.5 cm³
Vibration level left/right2.5 m/s²

Summary

Safety Precautions

General Warnings and Operator Condition

Includes general operational warnings, physical/mental requirements, and pacemaker advisory.

Safety Precautions (Continued)

Proper Clothing and Hazardous Substance Warnings

Guidance on protective apparel, and warnings for dust, silica, and asbestos hazards.

Eye, Hearing Protection, Blower, and Fueling Safety

Safety gear advice, transport, harness, and fueling precautions.

Fueling Safety Precautions

Specific warnings and procedures for safe fueling operations.

Before Starting

Pre-Start Checks and Starting Procedure Warnings

Inspecting the unit, fanwheel, housing, and starter grip procedures.

Muffler and Catalytic Converter

Hot Parts, Burn Prevention, and Catalytic Converter Safety

Warnings for hot components, burn prevention, and converter cooling/safety.

Working Instructions

Operating Procedures and Environmental Warnings

Handle grip, fumes, air blast, foreign objects, and wind direction.

Using the Vacuum Attachment

Hazardous Material Warning for Vacuum Use

Do not pick up hot or burning substances or combustible fluids.

Fuel

Harness Strap Adjustment and Fuel Mixture Requirements

Adjusting harness straps and specifications for fuel/oil mixture.

Fuel Handling Safety Precautions

Safe practices for handling gasoline and fuel mix.

Fueling

Fuel Mixing, Storage, and Procedures

Guidelines for mixing, storing fuel, and the fueling process.

Starting / Stopping the Engine

Setting Lever and Choke Operation for Starting

Using the setting lever and choke for cold and warm engine starts.

Starting / Stopping the Engine (Continued)

Cleaning the Air Filter

Adjusting the Carburetor

Factory Settings, High Speed Screw, and Lean Risk

Standard settings, adjustment limits, and risks of lean mixture.

Adjusting the Carburetor (Continued)

Catalytic Converter

Checking the Spark Plug

Spark Arresting Screen in Muffler

Screen Safety, Checks, and Removal

Fire risk, power checks, and procedure for screen removal.

Replacing Starter Rope and Rewind Spring

Replacing Starter Rope and Rewind Spring (Continued)

Storing the Machine

Maintenance Chart

Parts and Controls

Specifications

Maintenance and Repairs

Emission Control Warranty Statement

Emission Control Warranty Statement (Continued)

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