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Summary of Contents for Stihl BR 320
- Page 2 Parts and Controls Replacing the Starter Rope This Manual contains operating and Safety Precautions and Rewind Spring safety instructions for all STIHL BR 320, Assembling the Blower Operating Instructions BR 320 L, BR 400 blowers. Using the Blower Storing the Machine...
- Page 3 3DUWV DQG &RQWUROV 1 = Nozzle 2 = Blower tube 3 = Control handle 4 = Throttle trigger 5 = Setting lever 6 = Stop switch 7 = Pleated hose 8 = Harness 9 = Back plate 10 = Back padding 11 = Air filter 12 = Rubber buffers 13 = Spark plug boot...
- Page 4 'HILQLWLRQV 1R]]OH $LU ILOWHU FRYHU Aims and widens the spray or Cover the air filter element. airstream. 5XEEHU EXIIHUV %ORZHU WXEH Elements designed to reduce the Directs spray or airstream. transmission of vibrations created by the engine to the operators back. &RQWURO KDQGOH 6SDUN SOXJ WHUPLQDO Handle on the flexible hose to hold...
- Page 5 6DIHW\ 3UHFDXWLRQV 6DIH XVH RI D EORZHU LQYROYHV :DUQLQJ :DUQLQJ The use of any blower may The STIHL BR 320, 400 is equipped the operator be dangerous. It is important with an antivibration system (AV). The the blower that you read, fully under- AV system is designed to reduce the the use of the blower .
- Page 6 Gasoline is an extremely authorized attachment are useable for with the inhalation of dust, use a face flammable fuel. If spilled the STIHL blower, their use may be filter mask when using your blower in or ignited by a spark or extremely dangerous.
- Page 7 Place the machine on firm The screw driver end of ground or other solid surface in an open the STIHL combination area. Maintain good balance and secure :RUNLQJ &RQGLWLRQV wrench or other similar footing.
- Page 8 To reduce the risk of serious or fatal NIOSH / MSHA for the substance at injury from breathing toxic fumes, never issue. run the blower indoors or in poorly venti- :DUQLQJ lated locations. Ensure proper ventilation Dust with silica in its composition may when working in trenches or other con- contain crystalline silica.
- Page 9 8VH RI %ORZHU Do not place the blower on the ground when operating at high speed, because The STIHL blower can be used for small objects such as sand, gras, dust, clearing leaves and grass clippings from etc. may be pulled into the air intake and gardens and driveways and can also be damage the fan wheel.
- Page 10 Do not attempt any main- tenance or repair work not described in your owner’s manual. Have such work performed at your STIHL service shop only. %5 ...
- Page 11 $VVHPEOLQJ WKH %ORZHU • Push the nozzle onto the end Tools are stowed on the underside of Important: The throttle cable is already of blower tube and rotate it the blower (one combination wrench and connected and must not be kinked one carburetor screwdriver) during assembly.
- Page 12 • Pull the ends of the straps downward to tighten the harness. $GMXVWLQJ WKH FRQWURO KDQGOH The BR 320/400 blower is designed for single-handed operation. It is carried as • Put the unit on your back. a backpack and operated with the right •...
- Page 13 Use only STIHL two-stroke engine oil or • After using blowers, clean up. Do equivalent branded two-stroke air- not blow debris onto neighbouring cooled engine oils with the classification properties.
- Page 14 )XHOLQJ We recommend STIHL 50:1 two-stroke engine oil since it is specially formulated for use in STIHL engines. Do not use BIA or TCW (two-stroke water cooled) mix oils! Take care when handling gasoline. Avoid direct contact with the skin and avoid inhaling fuel vapour.
- Page 15 6WDUWLQJ • • f the engine is FROG, turn the Observe safety precautions - see chap- Put the unit on the ground. choke knob to N ter "Safety Precautions" in this manual. Check that bystanders are well clear of the general work area and •...
- Page 16 ,I WKH HQJLQH GRHVQ¶W VWDUW If you did not turn the choke knob to H quickly enough after the engine began to fire, the combustion chamber has flooded. • Remove spark plug boot. • Unscrew and dry off the :KHQ WKH HQJLQH EHJLQV WR ILUH $V VRRQ DV HQJLQH UXQV spark plug.
- Page 17 &OHDQLQJ WKH $LU )LOWHU $GMXVWLQJ WKH &DUEXUHWRU 0RWRUPDQDJHPHQW Exaust emissions are controlled by the design of the fundamental engine para- meters and components (e.g. carbu- ration, ignition, timing and valve or part timing) without the addition of any major hardware. •...
- Page 18 &RUUHFWLRQV WR KLJK VSHHG DGMXVWLQJ If you don‘t have a tachometer, do not VFUHZ set the highspeed adjusting screw any leaner by turning it beyond the standard The high speed adjusting screw + setting. alters the power output and maximum off-load engine speed. 2SHUDWLRQ DW KLJK DOWLWXGH If you turn this screw too far clock- PRXQWDLQV ...
- Page 19 • use only spark plugs authorized by Use only resistor type spark plugs STIHL (see “Specifications”). Always of the approved range. press spark plug boot snugly onto spark plug terminal of the proper Rectify problems which have caused size.
- Page 20 6SDUN $UUHVWLQJ 6FUHHQ LQ 0XIIOHU • • Squeeze the ends of the clip Place housing in position. If the engine is down on power, check • the spark arresting screen in the muffler. together and lift the clip away. Tighten down housing screws.
- Page 21 5HSODFLQJ 6WDUWHU 5RSH DQG 5HZLQG 6SULQJ • • • Remove the three screws . Remove the spring clip . Ease the cap out of the starter • • Lift the starter cover off Remove the rope rotor with grip.
- Page 22 5HSODFLQJ D EURNHQ UHZLQG VSULQJ • Lubricate the new spring with a few drops of non-resinous oil - • Remove the rope rotor - see "Replacing Starter Rope" - • Remove parts of old spring. • • Thread the rope through the rotor Coat rope rotor bearing bore with and secure it with a simple over- non-resinous oil.
- Page 23 • When starter rope is fully extended it must be possible to rotate the rotor at least another half turn. If this is not the possible, the spring is over- tensioned and could break Take off one turn of the rope. •...
- Page 24 2SHUDWLQJ ,QVWUXFWLRQV 6WRULQJ WKH 0DFKLQH 'XULQJ EUHDNLQ SHULRG For periods of about 3 months or longer: • A factory new machine should not be Remove the blower tube and run at high revs (full throttle off load) for nozzle. • the first three tank fillings.
- Page 25 (not adjusting screws) Retighten :DUUDQW\ FODLPV IROORZLQJ UHSDLUV The user of this unit should carry out Original STIHL parts can be identified FDQ EH DFFHSWHG RQO\ LI WKH UHSDLU only the maintenance operations by the STlHL part number, the KDV EHHQ SHUIRUPHG E\ DQ DXWKRUL]HG T logo and the STIHL parts described in this manual.
- Page 26 6SHFLILFDWLRQV Model BR 320 BR 320 L BR 400 STIHL single cylinder two-stroke engine - Displacement 44.9 cm (2.74 cu.in) 44.9 cm (2.74 cu.in) 56.5 cm (3.45 cu.in) - Bore 41 mm (1.61 in) 41 mm (1.61 in) 46 mm (1.81 in) - Stroke 34 mm (1.34 in)
- Page 27 ,JQLWLRQ 6\VWHP 'LPHQVLRQV Type: Electronic Height: 445 mm (17.5 in) magneto ignition Width: 480 mm (18.9 in) Spark plug Bosch WSR 6 F Depth: 280 mm (11.0 in) (suppressed): NGK BPMR 7 A; 6SHFLDO $FFHVVRULHV Heat range 200 Electrode gap: 0.5 mm (0.02 in) Spark plug thread: M 14 x 1,25;...
- Page 28 1-800-467- regulations for small non road engines. 2ZQHU¶V :DUUDQW\ 5HVSRQVLELOLWLHV 8445 or you can write to STIHL Inc., The equipment engine must be free from 536 Viking Drive, P.O. Box 2015, defects in materials and workmanship As the small off-road equipment engine Virginia Beach, VA 23450-2015.
- Page 29 Any such work shall be free of mixture (see also instruction "Fuel"). warranty card to STIHL. If any emission charge to the owner if it is determined Deviations from this recommendation related part on your engine is defective, that a warranted part is defective.
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