III STIHL BG 75 Instruction Manual Owner's Manual Assembling Safety Precautions Operating Instructions Maintenance
&RQWHQWV Parts and Controls Definitions Safety Precautions Assembling the Blower Fuel Mix Fueling Starting Using the blower Cleaning the Air Filter Adjusting the Carburetor Motormanagement Spark Arresting Screen in Muffler Checking the Spark Plug Replacing the Starter Rope and Rewind Spring Printed on chlorine-free paper 2 3 4 10 11 11 12 14 16 16 16 17 18 19 Operating Instructions Maintenance Chart Specifications Special Accessories Storing the Machine STIHL Incorporated Federal and California Emission
DUWV DQG &RQWUROV 1 3 2 5 6 4 7 8 9 10 11 12 13 16 326BA038 KN 14 15 1= 2= 3= 4= 5= 6= 7= 8= 9= Slide control Handle Throttle trigger Intake screen Clamp Blower tube Nozzle Spark plug boot Fuel pump 10 = Choke lever 11 = Filter housing 12 = Carburetor adjusting screws 13 = Starter grip 14 = Fuel filler cap 15 = Fuel tank 16 = Muffler %*
'HILQLWLRQV 6OLGH &RQWURO Start, run and stop switch. +DQGOH The handle of the blower held by the right hand. &KRNH /HYHU Eases engine starting by enriching mixture. )LOWHU +RXVLQJ Covers the air filter element. 7KURWWOH 7ULJJHU Controls the speed of the engine. &DUEXUHWRU $GMXVWLQJ 6FUHZV For tuning carburetor ,QWDNH 6FUHHQ Reduces the risk of direct contact with the fan. 6WDUWHU *ULS The grip of the pull starter, which is the device to start the engine.
6DIHW\ 3UHFDXWLRQV :DUQLQJ 7KH XVH RI DQ\ EORZHU PD\ EH GDQJHURXV ,W LV LPSRUWDQW WKDW \RX UHDG IXOO\ XQGHUVWDQG DQG REVHUYH WKH IROORZLQJ VDIHW\ SUH FDXWLRQV :DUQLQJ 5HUHDG WKH RZQHUµV PDQXDO DQG WKH VDIHW\ LQVWUXFWLRQV SHUL RGLFDOO\ :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.
Use of gloves when working with the blower is recommended. Good footing is most important. Wear sturdy shoes with nonslip soles. :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. :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 Unit vibrations can cause an improperly tightened fuel cap to loosen or come off and spill quantities of fuel. In order to reduce risk of fuel spillage and fire, tighten fuel cap by hand with as much force as possible. 6WDUWLQJ You should always inspect your unit before starting it. Make sure the controls and safety devices are working properly. Failure to follow this procedure may result in injury to hand or fingers and may damage the starter mechanism.
Control dust, mist and fumes at the source where possible. In this regard use good work practices and follow the recommendations of OSHA / NIOSH and occupational and trade associations. When the inhalation of toxic dust, mists and fumes cannot be eliminated, the operator and any bystanders should always wear a respirator approved by NIOSH / MSHA for the substance at issue. :DUQLQJ Dust with silica in its composition may contain crystalline silica.
:DUQLQJ To reduce the risk of personal injury from fire and explosion, never attempt to pick up hot or burning substances (e.g. smoldering ashes, glowing cigarettes) or combustible fluids (e.g. gasoline, paint thinners). 326BA002 LÄ :DUQLQJ In order to reduce the risk of injury from contact with rotating parts and damage to the motor, the intake screen must always be screwed in place when the suction tube is not mounted.
:DUQLQJ A worn or damaged muffler is a fire hazard and may cause loss of hearing. Check to see that the muffler is in good condition. The blower must not be operated if the muffler is not functioning properly or has been removed. Remember that the risk of forest fires is greater in hot weather. Use the spark arresting muffler supplied with the unit. Never touch a hot muffler or burn will result.
$VVHPEOLQJ WKH %ORZHU 11 4 3 4 7 9 10 2 8 1 13 The BG 75 comes standard as a blower. A vacuum attachment* is available for user installation which can be used to pick up leaves, grass and similar materials. %ORZHU • • Line up the dots on the tube and housing and then push the blower tube onto the housing stub . Tighten down the clamp .
)XHO 0L[ )XHOLQJ This engine is certified to operate on unleaded gasoline and with the mix ratio 50:1. We recommend STIHL 50:1 two-stroke engine oil since it is specially formulated for use in STIHL engines. Your two-stroke engine requires a mixture of brand-name gasoline and quality two-stroke engine oil with the classification TC. Do not use BIA or TCW (two-stroke water cooled) mix oils! The chemical composition of the fuel is also important.
Change the fuel pick up body every year. • Before storing your machine for a long period, drain and clean the fuel tank and run engine until carburetor is dry. Observe safety precautions - see chapter "Safety Precautions" in this manual. To start the engine, move the slide control to position. Squeeze the throttle trigger and move the slide control to P at the same time.
When engine begins to fire: 326BA012 LÄ • • • • • Put the unit on the ground. Make sure you have a firm footing: Hold the unit with your left hand and press it firmly against the ground. Pull the starter grip slowly with your right hand until you feel it engage and then give it a brisk strong pull. Do not pull out starter rope more than 30" (75 cm) - it might break. Do not let the starter grip snap back. Guide it back slowly so that starter rope can rewind properly.
)XHO WDQN KDV EHHQ UXQ GU\ DQG ZDV UHIXHOHG WKHQ Press fuel pump bulb at least 5 times. • Now start the engine. 326BA004 LÄ 326BA014 LÄ 8VLQJ WKH EORZHU The blower is designed for singlehanded operation. The operator can grip the handle on the housing in his right or left hand. The blower’s wide nozzle is particularly effective for clearing large areas covered with sawdust, fallen leaves or cut grass etc. A large area can be covered with the wide nozzle.
To minimize blowing time, use rakes and brooms to loosen debris before blowing. Recommended working techniques to minimize airborne debris and pollution: • • 326BA002 LÄ • When using the blower as a vacuum cleaner (vacuum attachment as special accessory), the carrying strap on the catcher bag is placed over the left shoulder and the right arm is guided by the carrying strap. The left hand grips the handle on the housing, the right hand gripping the carrying handle.
&OHDQLQJ WKH $LU )LOWHU $GMXVWLQJ WKH &DUEXUHWRU H L 355BA031 KN ZLWK WZR DGMXVWLQJ VFUHZV 2 3 0RWRU 0DQDJHPHQW 4 326BA015 KN 1 Dirty air filters reduce engine power, increase fuel consumption and make starting more difficult. ,I WKHUH LV D QRWLFHDEOH ORVV RI HQJLQH SRZHU • • Move choke lever to J Press in the tab . Ease the filter cover over the tab and lift it off. Clean away loose dirt from around the filter.
&DUEXUHWRU ZLWK RQH DGMXVWLQJ VFUHZ 6SDUN $UUHVWLQJ 6FUHHQ LQ 0XIIOHU L 1 326BA031 KN LA $GMXVWLQJ LGOH VSHHG (QJLQH VWRSV ZKLOH LGOLQJ Carry out the standard setting. Turn the idle speed adjusting screw /$ clockwise until the engine runs smoothly. 2 326BA025 KN 326BA018 LÄ Your carburetor does not have a high speed adjusting screw (H screw). Adjustment of maximum engine speed is not necessary.
A 000BA039 KN &KHFNLQJ WKH 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.
5HSODFLQJ WKH 6WDUWHU 5RSH DQG 5HZLQG 6SULQJ 1 2 4 5 • Slacken off the housing screws. Remove the three screws . Lift the starter cover off the engine (if vac attachment is fitted, remove handle before starter cover) %* 326BA027 KN 326BA026 KN 3 326BA029 KN R • Take out the screw . Remove the rope rotor very carefully - the rewind spring is seated in the rope rotor and may pop out, uncoil and cause injury if care is not taken.
Pull the rope through the rotor and secure it with a simple overhand knot. • • • Lubricate rope rotor bore with non-resinous oil. Push rotor onto the starter post turn back and forth until loop of rewind spring engages. Insert screw and tighten down securely. 355BA021 KN 355BA020 326BA028 KN • 7HQVLRQLQJ UHZLQG VSULQJ Make a loop in the starter rope and use it to turn the rope rotor six full revolutions counterclockwise.
2SHUDWLQJ ,QVWUXFWLRQV • • 'XULQJ EUHDN LQ SHULRG When starter rope is fully extended, it must be possible to rotate the rotor another one half turn. If this is not the case, the spring is overtensioned and could break. Take one turn of rope off the rotor. Secure the starter cover. Tighten down the housing screws firmly. 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.
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 6WRULQJ WKH 0DFKLQH (QJLQH )XHO 6\VWHP Single cylinder two-stroke engine Carburetor: Displacement: Bore: Stroke: 1.55 cu.in (25.4 cm3) (1.34 in) 34 mm (1.10 in) 28 mm Engine power: 0.75 kW (1.00 HP) Fuel tank capacity: Fuel mixture: See "Adjusting the Carburetor" Weight: Max. permissible engine speed: Idle speed: 640 m3/h (377 cfm) 60 m/s (198 ft/s) ,JQLWLRQ 6\VWHP Electronic (breakerless) magneto ignition park plug (suppressed): Bosch WSR 6 F or NGK BPMR 7 A; 0.02 in (0.
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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. englisch/english U.S.A.
