STIHL BR 320, Instruction Manual Owner's Manual Assembling Safety Precautions Operating Instructions Maintenance 400
&RQWHQWV Parts and Controls Safety Precautions Assembling the Blower Using the Blower Fuel Fueling Starting Cleaning the Air Filter Adjusting the Carburetor Motormanagement Checking the Spark Plug Spark Arresting Screen in Muffler 2 4 10 11 12 13 14 16 16 16 18 19 Replacing the Starter Rope and Rewind Spring Operating Instructions Storing the Machine Maintenance Chart Specifications 20 23 23 24 25 STIHL Incorporated Federal and California Emission Control Warranty Statement 27 This Manual contains ope
DUWV DQG &RQWUROV 4 6 8 3 2 7 10 12 12 = Rubber buffers 13 = Spark plug boot 14 = Muffler (with spark arresting screen) 15 = Carburetor adjusting screws 16 = Choke knob 17 = Starter grip 18 = Fuel filler cap 13 16 15 14 ✽= Serial number 18 12 A033 KN 17 353BA032 11 9 353BA031 5 1 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 %5
'HILQLWLRQV 1R]]OH Aims and widens the spray or airstream. %ORZHU WXEH Directs spray or airstream. &RQWURO KDQGOH Handle on the flexible hose to hold and direct the tube in the required direction. 7KURWWOH WULJJHU Controls the speed of the engine. 6HWWLQJ OHYHU Sets the trottle to various positions. 6WRS VZLWFK Stops engine. 3OHDWHG KRVH For spraying, dusting or spreading in the desired direction. +DUQHVV For carrying the unit.
6DIHW\ 3UHFDXWLRQV :DUQLQJ The use of any blower may be dangerous. It is important that you read, fully understand and observe the following safety precautions and warnings. Reread the owner‘s manual and the safety instructions periodically. :DUQLQJ Careless or improper use of the machine may cause serious injury. Have your STIHL Dealer show you how to operate your blower. Observe all applicable local safety regulations, standards and ordinances.
:DUQLQJ To reduce the risk of injury associated with the inhalation of dust, use a face filter mask when using your blower in dusty conditions. with the specific STIHL blower models are authorized. Although certain unauthorized attachment are useable for the STIHL blower, their use may be extremely dangerous. :DUQLQJ Proper eye protection is a must. Even though the discharge is directed away from the operator, ricochets and bounce-backs can occur during blower operations.
:DUQLQJ Check for fuel leakage while refueling and during operation. If fuel or oil leakage is found, do not start or run the engine until leak is fixed and spilled fuel has been wiped away. Take care not to get fuel on your clothing. If this happens, change your clothing immediately. Always store gasoline in approved container. :DUQLQJ Unit vibrations can cause an improperly tightened fuel cap to loosen or come off and spill quantities of fuel.
To reduce the risk of serious or fatal injury from breathing toxic fumes, never run the blower indoors or in poorly ventilated locations. Ensure proper ventilation when working in trenches or other confined areas. 353BA038 LÄ :DUQLQJ :DUQLQJ To reduce the risk of personal injury, do not direct air blast towards bystanders, since the high pressure of the air flow could injure eyes and could blow small objects at great speed.
Always shut off the engine before cleaning or servicing the unit or replacing parts. Never insert any foreign object into the air intake of the machine or into the nozzle of the blower. It wil damage the fan wheel and may cause serious injury to the operator or bystanders as a result of the object or broken parts being thrown out at high speed. Do not place the blower on the ground when operating at high speed, because small objects such as sand, gras, dust, etc.
0$,17(1$1&( 5(3$,5 $1' 6725,1* 0DLQWHQDQFH UHSODFHPHQW RU UHSDLU RI WKH HPLVVLRQ FRQWURO GHYLFHV DQG V\VWHPV PD\ EH SHUIRUPHG E\ DQ\ QRQURDG HQJLQH UHSDLU HVWDEOLVKPHQW RU LQGLYLGXDO +RZHYHU LI \RX FODLP ZDUUDQW\ IRU D FRPSRQHQW ZKLFK KDV QRW EHHQ VHUYLFHG RU PDLQWDLQHG SUR SHUO\ RU LI QRQDSSURYHG UHSODFHPHQW SDUWV ZHUH XVHG 67,+/ PD\ GHQ\ ZDUUDQW\ Check fuel filler cap for leaks at regular intervals. Use the specified spark plug and make sure it and the ignition lead are always in good condition.
$VVHPEOLQJ WKH %ORZHU 5 4 10 7 2 3 11 6 9 Tools are stowed on the underside of the blower (one combination wrench and one carburetor screwdriver) Important: The throttle cable is already connected and must not be kinked during assembly. 0RXQWLQJ WKH HOERZ • • • • • Line up the stops on the elbow and fan housing stub . Push the elbow into the stub as far as it will go Fit the nut into the hexagon recess on the stub.
8VLQJ WKH %ORZHU 10 $GMXVWLQJ WKH KDUQHVV VWUDSV • Pull the ends of the straps downward to tighten the harness. 353BA004 11 $GMXVWLQJ WKH FRQWURO KDQGOH • • • • The BR 320/400 blower is designed for single-handed operation. It is carried as a backpack and operated with the right hand on the control handle. Put the unit on your back. Release the clamp screw . Slide the control handle along the pleated hose to the most comfortable position. Retighten the clamp screw .
)XHO 8VLQJ WKH YDFXXP DWWDFKPHQW VSHFLDO DFFHVVRU\ The vacuum attachment is used to pick up leaves, grass and other materials. Even big leaves, pieces of cardboard and bark fit through the large diameter suction tube. Recommended working techniques to minimize noise: • Take particular care when vacuuming GDPS leaves as they may clog the fan. Never pick up hot or burning substances, e.g. smoldering ashes, glowing cigarettes. Never vacuum close to a fire or other naked flames.
)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. )XHO PL[ DJHV Only mix sufficient fuel for a few days work, not to exceed 3 months of storage. Store in approved safety fuel-canisters only. When mixing, pour oil into the canister first, and then add gasoline.
6WDUWLQJ 353BA011 2 353BA010 353BA014 1 Observe safety precautions - see chapter "Safety Precautions" in this manual. • • Slide the stop switch to Move the setting lever to the center position VWDUWLQJ WKURWWOH SRVLWLRQ. 1RWH The setting lever can be used to select any throttle opening between idle speed (lower stop) and full throttle (upper stop). Set the lever to idle speed before shutting down the engine.
353BA016 2 ,I WKH HQJLQH GRHVQ¶W VWDUW 353BA017 353BA015 1 :KHQ WKH HQJLQH EHJLQV WR ILUH • • If engine is FROG: Turn choke to H and continue cranking until engine runs. If engine is ZDUP: Continue cranking until engine runs. $V VRRQ DV HQJLQH UXQV • • Move the setting lever to its lower end position so that engine settles down to idle speed.
&OHDQLQJ WKH $LU )LOWHU $GMXVWLQJ WKH &DUEXUHWRU H L 1 2 3 4 5 0RWRUPDQDJHPHQW 353BA000 KN 353BA043 KN 1 Dirty air filters reduce engine power, increase fuel consumption and make starting more difficult. • • ,I WKHUH LV D QRWLFHDEOH ORVV RII HQJLQH SRZHU • • • Turn choke knob to J Release the screws and pull off the filter cover . Clean away loose dirt from around the filter. • • • • Remove the prefilter (if fitted) from the filter element .
If you don‘t have a tachometer, do not set the highspeed adjusting screw any leaner by turning it beyond the standard setting. 2SHUDWLRQ DW KLJK DOWLWXGH PRXQWDLQV &RUUHFWLRQV WR KLJK VSHHG DGMXVWLQJ VFUHZ The high speed adjusting screw + alters the power output and maximum off-load engine speed. If you turn this screw too far clockwise and make the setting too lean, there is a risk of engine damage. L Slight correction PD\ be necessary.
A 000BA039 KN &KHFNLQJ 6SDUN 3OXJ Wrong fuel mix (too much engine oil in the gasoline), a dirty air filter and unfavorable running conditions (mostly at part throttle etc.) affect the condition of the spark plug. These factors cause deposits to form on the insulator nose which may result in trouble in operation. • • • • Remove spark plug see chapter “Starting”: Clean dirty spark plug. Check electrode gap it should be 0.5mm/0.02" $ readjust if necessary.
6SDUN $UUHVWLQJ 6FUHHQ LQ 0XIIOHU 3 4 4 3 4 5 1 5 7 1 6 1 2 4 4 If the engine is down on power, check the spark arresting screen in the muffler. :DUQLQJ Wait until engine has cooled down completely before performing the following operations. • • • • • Take out starter cover mounting screws . Remove the starter cover . Pull off the spark plug boot . Take out the housing mounting screws . Remove the housing .
5HSODFLQJ 6WDUWHU 5RSH DQG 5HZLQG 6SULQJ 6 1 1 2 7 • • Remove the three screws . Lift the starter cover off the engine. 353BA041 KN 353BA027 1 • • Remove the spring clip . Remove the rope rotor with washer and pawl . • • • • Ease the cap out of the starter grip. Remove remaining rope from the rotor and grip. Tie a simple overhand knot in the end of the new starter rope 1113 195 8200 - and then thread the rope through the top of the grip and the rope bush .
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. 353BA036 T • • • • Thread the rope through the rotor and secure it with a simple overhand knot. • • • • • %5 Coat rope rotor bearing bore with non-resinous oil.
• • • • Fit new spring housing - bottom plate must face downward. Engage outer spring loop over the lug. Refit the rope rotor. Go to "Tensioning rewind spring". If the spring has popped out and uncoiled: Refit it in the counterclockwise direction - start outside and work inward. 353BA030 353BA029 • • • When starter rope is fully extended it must be possible to rotate the rotor at least another half turn.
2SHUDWLQJ ,QVWUXFWLRQV 6WRULQJ WKH 0DFKLQH 'XULQJ EUHDN LQ SHULRG For periods of about 3 months or longer: A factory new machine should not be run at high revs (full throttle off load) for the first three tank fillings. This avoids unnecessary high loads during the break-in period. As all moving parts have to bed in during the break-in period, the frictional resistances in the engine are greater during this period. The engine develops its maximum power after about 5 to 15 tank fillings.
Complete machine Control handle Air filter Filter in fuel tank Fuel tank Carburetor Spark plug Cylinder fins Spark arresting screen in muffler All accessible screws and nuts (not adjusting screws) The user of this unit should carry out only the maintenance operations described in this manual. Other repair work may be performed only by an authorized STIHL Service dealer.
6SHFLILFDWLRQV Model BR 320 BR 320 L BR 400 STIHL single cylinder two-stroke engine - Displacement - Bore - Stroke - Engine power 44.9 cm3 (2.74 cu.in) 41 mm (1.61 in) 34 mm (1.34 in) 2.0 kW (2.7 bhp) 44.9 cm3 (2.74 cu.in) 41 mm (1.61 in) 34 mm (1.34 in) 1.4 kW (1.9 bhp) 56.5 cm3 (3.45 cu.in) 46 mm (1.81 in) 34 mm (1.34 in) 2.5 kW (3.
,JQLWLRQ 6\VWHP Type: Spark plug (suppressed): Electrode gap: Spark plug thread: 'LPHQVLRQV Electronic magneto ignition Bosch WSR 6 F or NGK BPMR 7 A; Heat range 200 0.5 mm (0.02 in) M 14 x 1,25; 9.5 mm (0.37 in) long Height: Width: Depth: 445 mm (17.5 in) 480 mm (18.9 in) 280 mm (11.
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:DUUDQW\ 3HULRG The warranty periods will begin on the date the utility equipment engine is purchased by the initial purchaser and you have signed and sent back the warranty card to STIHL. If any emission related part on your engine is defective, the part will be replaced by STIHL Incorporated at no cost to the owner.
& WARNING! The engine exhaust from this product contains chemicals known to the State of California to cause cancer, birth defects or other reproductive harm.
