Stihl BR 450 Instruction Manual
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Stihl BR 450 Instruction Manual

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BR 450, 450 C
2 - 22
Instruction Manual

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Summary of Contents for Stihl BR 450

  • Page 1 BR 450, 450 C 2 - 22 Instruction Manual...

  • Page 2: Table Of Contents

    Minimize Wear and Avoid Damage...18 Main Parts..........19 Engineering improvements Specifications..........20 Maintenance and Repairs......21 STIHL's philosophy is to continually improve all Disposal............ 21 of its products. For this reason we may modify EC Declaration of Conformity....21 the design, engineering and appearance of our products periodically.
  • Page 3 Only use parts and accessories that are explicitly complete freedom of movement. Wear snug-fitting clothing, an overall approved for this power tool by STIHL or are and jacket combination, do not wear technically identical. If you have any questions in a work coat.
  • Page 4 Have your machine repaired by a servicing dealer before using it again. STIHL offers a comprehensive range of personal – Throttle trigger must move freely and spring protective clothing and equipment. back to the idle position when released.
  • Page 5 2 Safety Precautions and Working Techniques English During Operation disturbances (e.g. reduced field of vision), prob‐ lems with hearing, dizziness, deterioration in abil‐ In the event of impending danger or in an emer‐ ity to concentrate. Apart from other possibilities, gency, switch off the engine immediately by mov‐...
  • Page 6 Use only a spark plug of the type approved by hands (whitefinger disease). STIHL and make sure it is in good condition – No general recommendation can be given for the see "Specifications". length of usage because it depends on several Inspect the ignition lead (insulation in good con‐...

  • Page 7: Assembling The Unit

    3 Assembling the Unit English Assembling the Unit Mounting the Hose Clamps and Pleated Hose ► Push the hose clamp (5) onto the pleated hose (2). ► Line up the hose clamp (5) and blower tube (6) – as shown. ►...
  • Page 8 English 3 Assembling the Unit Adjusting the Control Handle Mounting the Nozzle (BR 700 ► Open the clamping lever (3). ► Move the control handle (1) along the blower ► Push the nozzle (1) onto the blower tube (2) tube (2) to the most comfortable position. and engage it on the lugs (3).

  • Page 9: Adjusting The Throttle Cable

    Avoid direct skin contact with fuel and breathing in of gasoline fumes. STIHL MotoMix STIHL recommends using STIHL MotoMix. This pre-blended fuel is free of benzene and lead, is distinguished by a high octane rating, and always provides the proper mixing ratio.

  • Page 10: Fueling

    6.2.2 Engine oil Fueling If you mix the fuel yourself, use only STIHL two- stroke engine oil or another high-performance engine oil classified as JASO FB, JASO FC, JASO FD, ISO-L-EGB, ISO-L-EGC or ISO-L- EGD.

  • Page 11: Information Before You Start

    English Opening screw-type tank cap 1 Setting lever 2 Throttle trigger 3 Starter switch (BR 450 C only) Engine stop 0 – ignition interrupted, engine stops. The setting lever does not remain in ths position, it springs back. Normal run position F – engine runs or is ready to start.
  • Page 12 Electric start (BR 450 C) ► Push the choke knob in and turn it to o. The power tool is equipped with the STIHL elec‐ Also use this setting if the engine has been run‐ tric starter for convenient starts.
  • Page 13 9 Starting / Stopping the Engine English The starter battery is not replaceable – it is inte‐ grated in the control unit. If the power tool is stored at temperatures below 0°C it may cool down to a point where a start is inhibited to protect the battery.

  • Page 14: Operating Instructions

    English 10 Operating Instructions Stopping the Engine components (ignition, carburetor) from thermal overload. 10.2 After Finishing Work Storing for a short period: Wait for the engine to cool down. Keep the machine in a dry place, well away from sources of ignition, until you need it again.

  • Page 15: Adjusting The Carburetor

    12 Adjusting the Carburetor English ► Start and warm up the engine. ► Remove the filter element (3). ► Replace dirty or damaged filters. 12.4.1 Engine stops while idling ► Fit the new filter in the filter housing. ► Turn the idle speed screw (LA) slowly clock‐ ►...

  • Page 16: Spark Plug

    Arcing may occur if the adapter nut (1) is loose eroded. Install only suppressed spark plugs of or missing. Working in an easily combustible or the type approved by STIHL – see "Specifica‐ explosive atmosphere may cause a fire or an tions".

  • Page 17: Inspections And Maintenance By Dealer

    16 Inspections and Maintenance by Dealer English 16 Inspections and Mainte‐ nance by Dealer 16.1 Spark Arrestor in Muffler and Spacer WARNUNG To reduce the risk of damage to persons or objects from contact with hot parts, never oper‐ ate the machine without a spacer, or with the ►...

  • Page 18: Minimize Wear And Avoid Damage

    The power tool must be operated, maintained STIHL recommends that you have servicing and and stored with the due care and attention repair work carried out exclusively by an author‐ described in this owner's manual.

  • Page 19: Main Parts

    23 Muffler (with Spark Arresting Screen) 24 Spacer 19 Main Parts # Serial Number BR 450 19.1 Definitions BR 450 C 1. Straight Nozzle Aims and widens the airstream. 2. Blower Tube Directs the airstream. 3. Union Nut Allows simple adjustment of blower tube length.

  • Page 20: Specifications

    20 Specifications 20.5 Weight Carburetor Adjusting Screws For tuning the carburetor. BR 450: 10.6 kg BR 450 C: 11.5 kg Manual Fuel Pump Provides additional fuel feed for a cold start. 20.6 Sound and Vibration Levels Choke Knob When determining sound and vibration levels, Eases engine starting by enriching mixture.

  • Page 21: Maintenance And Repairs

    EU type appro‐ val procedure is specified at www.stihl.com/co2 in the product-specific technical data. ► Take STIHL products including packaging to a The measured CO value was determined on a suitable collection point for recycling in accord‐...
  • Page 22 English 23 EC Declaration of Conformity The year of manufacture and serial number are applied to the product. Done at Waiblingen, 15.07.2021 ANDREAS STIHL AG & Co. KG Dr. Jürgen Hoffmann Director Product Certification & Regulatory Affairs 0458-391-8321-B...
  • Page 23 23 EC Declaration of Conformity English 0458-391-8321-B...
  • Page 24 *04583918321B* 0458-391-8321-B...

This manual is also suitable for:

Br 450 cBr 450 c-ef

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