MTD BCR4 User's Manual
Contents
1. Clean or replace muffler spark arrestor Carburetor misadjusted Take to an authorized service dealer for carburetor adjustment CUTTING HEAD WILL NOT ADVANCE LINE CAUSE ACTION Cutting head out of line iss is dero acd Refill with new line Inner reel bound up 4400 sa sowie e ttr erre me Replace the inner reel Cutting head dirty aaaaaaaa eee eee eae Clean inner reel and outer spool Line welded ccc ec cp rep e rer RR Disassemble remove the welded section and rewind the line Line twisted when refilled Disassemble and rewind the line Not enough lineis exposed Push the bump knob and pull out line until 102 mm 4 inches of lineis outside of the cutting head CUTTING LINE ADVANCES UNCONTROLLABLY CAUSE ACTION Oil in cutting Clean the cutting head assembly If further assistance is required contact your authorized service dealer 22 NOTES 23 SPECIFICATIONS ENGINE Ending Type s RE bot DERE Air Cooled 4 Cycle MT m 26 2 cc 1 6 in Clutch Type C MP Centrifugal Idle Speed 4 MP 3 000 3 600 rpm Operating RPM AREE RE EEG EE EE ERE EA RAE EE 7 200 8 300 rpm rn e bia sect ase ue T r L rn E2. 4 4 Cycle Petrol Trimmer OPERATOR S MANUAL IMPORTANT MANUAL DO NOT THROW AWAY INTRODUCTION Thank You Thank you for purchasing this quality product This modern outdoor power tool is designed to provide many hours of useful service You will find it to bea great labor saving device This operator s manual provides you with easy to understand operating instructions Read the entire manual and follow all of the instructions to keep your new outdoor power tool in top operating condition PRODUCT REFERENCES ILLUSTRATIONS AND SPECIFICATIONS All information illustrations and specifications in this manual are based on the latest product information available at the time of printing We reserve the right to make changes at any time without notice Copyright 2002 MTD SOUTHWEST INC All Rights Reserved SERVICE INFORMATION Service on this unit both within and after the warranty period should be performed only by an authorized and approved service dealer NOTE PROOF OF PURCHASE WILL BE REQUIRED FOR WARRANTY SERVICE Make sure you carefully read and understand this manual before starting or operating this equipment THIS PRODUCT IS COVERED BY ONE OR MORE US PATENTS OTHER PATENTS PENDING TABLE of CONTENTS Rules for Safe Operation 3 7 Important Safety Information 3 Safety and International Symbols 5 Know your Unit 6 nn 7 Assembly Instruc
3. 6 Placethe new inner reel inside the outer spool Push the inner reel and outer spool together While holding the inner reel and outer spool grasp the ends and pull firmly to release the line from the holding slots in the spool 7 Hold the inner reel in place and install the Bump Knob by turning counterclockwise Tighten securely Replacement Parts Line assembly replacement parts are listed in the Replacement Parts Accessories section MAINTENANCE amp REPAIR INSTRUCTIONS AIR FILTER MAINTENANCE WARNING To avoid serious personal injury always turn off your trimmer and allow it to cool before you clean or maintain it Clean and re oil the air filter every 10 hours of operation It is an important item to maintain Failure to maintain the air filter will VOID the warranty 1 Remove the air filter cover by pulling up the two tabs on the bottom back of the cover then pull out and up See Figure 20 2 Removethe air filter FIGURE 22 3 Wash the filter in detergent and water Rinse the filter thoroughly and allow it to dry 6 Reinstall the filter See Figure 22 4 Apply enough clean SAE 30 motor oil to lightly coat the filter See Figure 21 SPARK ARRESTOR MAINTENANCE 5 Squeeze the filter to spread and remove excess oil 1 Remove the muffler cover Refer to the Rocker See Figure 21 Arm section 2 Using apair of pliers remove the clip wrapped Ai
4. See Figure 1 Place it a 6 Tighten the clamp screws evenly until the minimum of 15 24 cm 6 inches from the end of D handle is secure the shaft grip 3 Start the screws with a large flathead or T25 screwdriver Do not tighten them until you make the handle adjustment OIL amp FUEL INFORMATION RECOMMENDED OIL TYPE It is extremely important to use the proper type and weight of oil in the crankcase Check the oil before each use and change the oil regularly The use of incorrect or dirty oil can cause premature engine wear and failure Use a high quality SAE 30 weight oil of API American Petroleum Institute service class SF SG SH ADDING OIL TO CRANKCASE INITIAL USE NOTE This unit is shipped without oil To avoid damaging the unit put oil in the crankcase before attempting to start it NOTE This 4 Cycle trimmer is shipped for operation in conditions above 40 F 4 For cold weather operation where temperatures dip below 40 F 4 C usea high quality SAE 10W30 weight oil of API American Petroleum Institute service class SF SG SH l Placetheunit on a flat level surface See Figure 3 It is crucial to keep the unit level when filling with oil 2 Removethe oil plug dipstick from the crankcase 3 Pour 100ml of oil into the oil fill hole See Figure 4 NOTE Never add oil to the fuel or fuel tank 4 Wipeup any oil that may have spilled and reinstall the oil fill plug dipstick The importanc
5. and dry place to prevent unauthorized use or damage out of the reach of children Never douse or squirt the unit with water or any other liquid Keep handles dry clean and free from debris Clean after each use referring to the Cleaning and Storage instructions Keep these instructions Refer to them frequently and use them to instruct other users If you loan someone this unit also loan them these instructions SAVE THESE INSTRUCTIONS RULES FOR SAFE OPERATION SAFETY AND INTERNATIONAL SYMBOLS This operator s manual describes safety and international symbols and pictographs that may appear on this product Read the operator s manual for complete safety assembly operating and maintenance and repair information SAFETY ALERT SYMBOL Indicates danger warning or caution May be used in conjunction with other symbols or pictographs WARNING READ OPERATOR S MANUAL Failure to follow operating instructions and safety precautions in operator s manual can result in serious injury Read operator s manual before starting or operating this unit WEAR EYE AND HEARING PROTECTION WARNING The operation of any power tool can be the source of thrown objects T and loud noise which can cause severe eye injury and hearing loss Always wear safety glasses or goggles eye protection and ear protection when operating this unit Use a full face shield when needed NOTE Long term exposure to the sound pressure levels specified may
6. and pets at least 15 m 50 feet away from the cutting area The cutting attachment shield must be used when using the trimmer cutting attachment RULES FOR SAFE OPERATION KNOW YOUR UNIT APPLICATIONS As a trimmer Cutting grass and light weeds Edging Decorative trimming around trees fences etc Spark Plug Primer Bulb Air Filter Cover Choke Lever Throttle Shoulder Control Strap L R rap Loop Fuel Cap Starter Rope Grip Oil Fill Plug Dipstick On Off Stop Control Shaft Housing gt Gear Housing Cutting Attachment Shield E Line Cutting Blade Cutting Attachment ASSEMBLY INSTRUCTIONS INSTALLING THE D HANDLE The D handle may be pre installed one some units In this case all that is required is the loosening of screws and D handle adjustment Tailor the handle to the operator Go to step 4 for adjusting the D handle if it is pre installed Shaft Grip Shaft Housing Minimum 15 24 cm 6 inches D Handle FIGURE 2 4 If the D handle was pre installed loosen its screws just enough so that the handle slides and moves easily 1 Remove the screws and bottom clamp piece that 5 While holding the unit in the operating position were installed on the D handle for shipping arrange the D handle to the location that provides 2 Place the D handle over the shaft housing and YOU MIG Dest grip onto the bottom clamp
7. cause permanent loss of hearing Operator s should wear hearing protectors in accordance with AS 1270 KEEP BYSTANDERS AWAY WARNING Keep all bystanders especially children and pets at least 15 meters 50 feet from the trimming area 5 PRIMER BULB Push primer bulb fully and slowly 5 to 7 times UNLEADED FUEL Petrol Always use clean fresh unleaded fuel petrol Ty m Refer to operator s manual for the proper type of oil RULES FOR SAFE OPERATION ma 1 OE THROWN OBJECTS AND ROTATING CUTTER CAN CAUSE SEVERE INJURY WARNING Do not operate without plastic string guard in place Keep away from rotating cutting head IGNITION SWITCH ON START RUN IGNITION SWITCH OFF or STOP HOT SURFACE WARNING Do not touch a hot muffler or cylinder You may get burned These parts FAAA get extremely hot from operation and remain hot for a short time after the unit is turned off SHARP BLADE WARNING Sharp blade on string guard To prevent serious injury do not touch blade CHOKE CONTROL A FULL choke position B PARTIAL choke position C RUN position BRUSHCUTTERS REPLACE DULL BLADE Do not sharpen the cutting blade Sharpening the blade can cause the blade tip to break off while in use This can result in severe personal injury e TRIM M ER BRUSHCUTTER SAFETY WARNING Thrown objects and rotating cutter can cause severe injury Keep bystanders especially children
8. NCY Before starting engine Every 10 hours First change at 10 hours Every 25 hours thereafter Every 25 hours Change oil Change oil 10 hours on new engine Every 25 hours Every 25 hours Check for Loose Fastener Parts Bump Head String Guard Screws After Each Use Clean Unit and Labels Clean the unit using a damp cloth with a mild detergent Wipe off the unit with a clean dry cloth Keep air vents free from debris at all times Clean spark arrestor Check rocker arm to valve clearance and adjust Check rocker arm to valve clearance and adjust Check spark plug condition and gap NOTE Maintenance replacement or repair of the emission control devices and system may be performed by any non road engine repair establishment individual or authorized service dealer In order to assure peak performance of your engine inspection of the engine exhaust port may be necessary after 50 hours of operation If you notice lost RPM poor performance or general lack of acceleration this service may be required If you feel your engine is need of this inspection refer service to any non road engine repair establishment individual or authorized service dealer for repair DO NOT attempt to perform this process yourself as engine damage may result from contaminants involved in the cleaning process for the port MAINTENANCE REQUIRED REFER TO Fill fuel tank with fresh fuel Page 9 Check oil Page 18 Clean and re oil ai
9. amp REPAIR INSTRUCTIONS CARBURETOR SETTING The idle speed of the engine is adjustable through the air filter muffler cover See Figure 26 NOTE Careless adjustments can seriously damage your unit An authorized service dealer should make carburetor adjustments Check Fuel Mixture Old or dirty fuel is usually the reason for improper unit performance Drain and refill the tank with fresh fuel prior to making any adjustments Refer to Oil and Fuel Information Clean Air Filter The condition of the air filter is important to the operation of the unit A dirty air filter will restrict air flow and change the air fuel mixture This is often mistaken for an out of adjustment carburetor Check the condition of the air filter before adjusting the idle speed screw Refer to Air Filter Maintenance Adjusting the Idle Speed WARNING The cutting head may spin during idle speed adjustment Wear protective clothing and observe all safety instructions to prevent serious personal injury If after checking the fuel mixture and cleaning the air filter the engine still will not idle adjust the idle speed as follows 1 Start the engine and let it run at a high idle for a minute to warm up 2 Releasethe throttle trigger and let the engine idle If the engine stops engage the idle speed screw with a small screwdriver See figure 26 Turn the idle speed screw in clockwise 1 8 of a turn at a time as needed until the engine idl
10. apors can explode if ignited Take the following precautions READ ALL INSTRUCTIONS BEFORE OPERATING Read the instructions carefully Be familiar with the controls and proper use of the unit Do not operate this unit when tired ill or under the influence of alcohol drugs or medication Children and teens under the age of 15 must not use the unit except for teens guided by an adult Inspect the unit before use Replace damaged parts Check for fuel leaks Make sure all fasteners are in place and secure Replace cutting head parts that are cracked chipped or damaged in any way Make sure the cutting head is properly installed and securely fastened Be sure the cutting head guard is properly attached and positioned as recommended Failure to so can result in personal injury to the operator and bystanders as well as damage to the unit Use only original equipment replacement line Never use metal reinforced line wire or rope etc These can break off and become a dangerous projectile Beaware of the risk of injury to the head hands and feet Store fuel only in containers specifically designed and approved for the storage of such materials Always stop the engine and allow it to cool before filling the fuel tank Never remove the cap of the fuel tank or add fuel when the engine is hot Pressure can build up in the fuel tank Loosen the fuel tank cap slowly to relieve any pressure in the tank Add fuel in a clean we
11. e cut by working from top to the bottom in small increments to avoid premature line wear or engine drag 4 Whenever possible cut right to left When cutting to theleft the unit s cutting efficiency is improved slightly Also the clippings are thrown away from the operator 5 Slowly movethe trimmer into and out of the area being cut keeping the trimmer at the desired cutting height Move either in a forward to backward or side to side motion Cutting shorter lengths produces best results 6 Trim only when grass and weeds are dry 7 Thelife of your cutting line is dependent upon Following the trimming techniques What vegetation is being cut Where vegetation is cut For example the line will wear faster when trimming against a foundation wall as opposed to trimming around a tree MAINTENANCE amp REPAIR INSTRUCTIONS MAINTENANCE SCHEDULE Perform these required maintenance procedures at the frequency stated in the table These procedures should also be a part of any seasonal tune up NOTE Some maintenance procedures may require special tools or skills If you are unsure about these procedures take your unit to any non road engine repair establishment individual or authorized service dealer WARNING To prevent serious injury never perform maintenance or repairs with unit running Always service and repair a cool unit Disconnect the spark plug wire to ensure that the unit cannot start FREQUE
12. e of checking and maintaining the proper oil level in the crankcase cannot be overemphasized Check oil before each use and change as specified in the Maintenance Schedule FIGURE 3 FIGURE 4 RECOMMENDED FUEL TYPE Old fuel is the primary reason for improper unit performance Be sure to use fresh clean unleaded petrol gasoline NOTE Thisis a four cycle engine In order to avoid damage to the unit do not mix oil with petrol gasoline OIL amp FUEL INFORMATION DEFINITION OF BLENDED FUELS Today s fuels are often a blend of petrol and oxygenates such as ethanol methanol or MTBE ether Alcohol blended fuel absorbs water As little as 1 water in the fuel can make fuel form acids when stored When using alcohol blended fuel use fresh fuel that is less than 60 days old Using Blended Fuels If you choose to use a blended fuel or if its use is unavoidable follow recommended precautions Always use fresh unleaded petrol gasoline Use the fuel additive STA BIL or an equivalent Drain tank and run the engine dry before storing the unit Using Fuel Additives The use of fuel additives such as STA BIL9 Gas Stabilizer or an equivalent will inhibit corrosion and minimize the formation of gum deposits Using a fuel additive can keep fuel from forming harmful deposits in the carburetor for up to six 6 months Add 0 8 oz 23 ml of
13. engine is still warm The oil will flow freely and carry away more impurities CAUTION Wear gloves to prevent injury when handling the unit 1 Unplug spark plug boot to eliminate starting 2 Removethe oil fill plug dipstick 3 Pour the oil out of the oil fill hole and into a container by tipping the unit to a vertical position Allow ample time for complete drainage See Figure 25 FIGURE 24 6 Ifthelevel is low add a small amount of oil to the oil fill hole and recheck Repeat until the oil level reaches the top of the dipstick See Figure 24 NOTE Do not overfill the unit NOTE Make sure the O ring is in place on the oil fill plug dipstick when checking and changing the oil See Figure 24 4 Wipe up any oil residue on the unit and clean up any oil that may have spilled Dispose of the oil according to Federal State and Local regulations 5 Refill the crankcase with 3 4 fluid ounce 100 ml of SAE 30 SF SG SH oil NOTE For cold weather operation where temperatures plummet below 40 F 4 C use a high quality SAE 10W30 weight oil of API American Petroleum Institute service class SF SG SH NOTE Measure the correct amount of oil and fill the unit with approximately 3 4 ounces 100 ml Check the level with the dipstick If the level is low add a small amount of oil and recheck Do not overfill 6 Replace the oil fill plug dipstick 7 Reconnect the spark plug boot MAINTENANCE
14. es smoothly NOTE Thecutting head should not rotate when the engine idles Idle Speed Screw FIGURE 26 3 Ifthe cutting head rotates when the engine idles turn the idle speed screw counterclockwise 1 8 of a turn at a time as needed to reduce idle speed These procedures should solve most engine problems If this isn t the case and Theengine will not idle Theengine hesitates or stalls on acceleration Thereis aloss of engine power Have the carburetor adjusted by an authorized service dealer WARNING After the unit is turned off make sure the cutting head has stopped before you set down the unit This will help prevent serious personal injury ROCKER ARM CLEARANCE This procedure requires disassembly of the engine If you feel unsure or unqualified to perform this take the unit to an authorized service center NOTE Inspect the valve to rocker arm clearance with a feeler gauge after the first 10 hours of operation and then every 25 hours of operation thereafter The engine must be cold when checking or adjusting the valve clearance This task should be performed inside in a clean dust free area MAINTENANCE amp REPAIR INSTRUCTIONS l Loosen the four 4 screws shown in Figure 27 Engine FIGURE 27 2 Removethe three 3 screws that secure the engine cover visible in Figures 27 and 28 3 Disconnect the spark plug wire 4 Removethe spark plug 5 Removethe engine c
15. fuel additive per gallon of fuel according to the instructions on the container NEVER add fuel additives directly to the unit s gas tank FUELING UNIT WARNING Petrol gasoline is extremely flammable and its vapors can explode if ignited To avoid serious personal injury always stop the engine and allow it to cool before filling the fuel tank Do not smoke while filling the tank Keep sparks and open flames away from the area 1 Remove the fuel cap and NOTE Fill or add fuel to the tank only when the trimmer is in a horizontal position WARNING Remove fuel cap slowly to avoid injury from petrol spray 2 Placethe spout of the gas container into the fill hole on the fuel tank and fill See Figure 5 FIGURE 5 WARNING Add petrol gasoline in a clean well ventilated outdoor area Avoid creating a source of ignition for spilled fuel NOTE Do not overfill tank 3 Wipe up any petrol that may have spilled 4 Reinstall the fuel cap WARNING Never operate the unit without the fuel cap securely in place 5 Movethe unit at least 9 1 m 30 ft from the fueling source and site before starting the engine NOTE Dispose of the old petrol in accordance to Federal State and Local regulations STARTING STOPPING INSTRUCTIONS STARTING INSTRUCTIONS WARNING Operate this unit only in a well ventilated outdoor area Carbon monoxide exhaust fumes can be lethal in a confined area sure yo
16. g Cutting H ead Bar elo NENNEN RI E T TUE Bump Line Releaser Line Spool Diameter ossa x4 RR ERE ERE EK ERG EET RR Sa gee EN A es on 101 6 mm 4 inches Timming Line Diameter 2 isc ods pave XO oto aem d eod tea o eed 2 41 mm 0 095 inches Cutting Path Diameter usua eade 1360 ARR TP EN RU SEE ARE eR RE 44 0 cm 18 inches OPERATOR S MANUAL PART NO 792 10550A PRINTED IN THE USA 8 02
17. h of the guard as specified in this manual If you strike or become entangled with a foreign object stop the engine immediately and check for damage Repair any damage before further operation is attempted Do not operate the unit with loose or damaged parts Frequently inspect the condition of the cutting head All damaged parts must be replaced immediately Follow all the required precautions when undertaking replacement Performing any maintenance repair or for changing cutting head or safety attachments must be undertaken with the engine stopped Use only genuine replacement parts when servicing this unit These parts are available from your authorized dealer The use of non standard parts or other accessories or attachments not designed for this unit could result in serious injury to the user or damage to the unit and void your warranty Keep unit clean of vegetation and other materials They may become lodged between the cutting head and guard mount To reduce fire hazard replace faulty mufflers and spark arrestors keep the engine and muffler free of grass leaves excessive grease or carbon buildup OTHER SAFETY WARNINGS Never store the unit with fuel in the tank inside a building where fumes may reach an open flame or spark Allow the engine to cool before storing or transporting Be sure to secure the unit while transporting Drain fuel before transporting unit Store the unit in a locked up and dry or high
18. he line through the inner reel so that the loop is as small as possible See Figure 15 FIGURE 12 3 Removethe spring from the inner reel See Figure 12 4 Useaclean cloth to wipe the inner reel spring shaft and inner surface of the outer spool 5 Check the indexing teeth on the inner reel and outer spool for wear See Figure 13 If necessary n ZO remove burrs or replace the reel and spool rant 00 1709 A 2 N NOTE You can only use the membrane line with the inner reel that contains slotted holes Single line can be used on either type of inner reel Use Figure 14 to identify the inner reel you have 7 Wind the lines in tight even layers onto the reel See Figure 16 Wind the line in the direction indicated on the inner reel Place your index finger between the two lines to stop the lines from overlapping Do not overlap the ends of the line Proceed to step 11 Indexing Teeth FIGURE 13 MAINTENANCE amp REPAIR INSTRUCTIONS Membrane Line Installation 8 Take approximately 20 feet 6 1 m of new trimming line Insert one end of the line through one of the two holes in the inner reel Pull the line through the inner reel until only about 4 inches is left out See Figure 17 9 Insert the end of the line into the open hole in the inner reel and pull the line tight to make the loop as small as possible See Figure 17 FIGURE 17 10 Before winding spl
19. it the line back about 6 inches 11 Wind the line in tight even layers in the direction indicated on the inner reel NOTE Failure to wind the line in the direction indicated will cause the cutting attachment to operate incorrectly 12 Insert the ends of the line into the two holding slots See Figure 18 FIGURE 18 13 Insert the ends of the line through the eyelets in the outer spool and place inner reel with spring inside the outer spool See Figure 19 Push the inner reel and outer spool together While holding the inner reel and outer spool grasp the ends and pull firmly to release the line from the holding slots in the reel FIGURE 19 NOTE The spring must be assembled on the inner reel before reassembling the cutting attachment 14 Hold the inner reel in place and install the Bump Knob by turning counterclockwise Tighten securely Installing A Prew ound Reel 1 Hold the outer spool with one hand and unscrew the Bump Knob clockwise See Figure 12 Inspect the bolt inside the Bump Knob to make sure it moves freely Replace the Bump Knob if damaged 2 Removethe old inner reel from the outer spool See Figure 12 3 Removethe spring from the old inner reel See Figure 12 4 Placethe spring in the new inner reel NOTE The spring must be assembled on the inner reel before reassembling the cutting attachment 5 Insert the ends of the line through the eyelets in the outer spool See Figure 19
20. lectronic On Off Stop Control vad oS eee resected cake Sees FENCE EE kkk Toggle Switch Valve clearance intake and exhaust 076 0152 mm 003 006 in Spark Plug iiis epp E ERR Kot thaw he Reker E EATER 0 635 mm 0 025 in 80 232422 rac ce Pp Rozp E cece PADRE ESA GA een hh en eae MILANESE sae ae SAE 30 Oil Crankcase Oil Capacity ieee ede eee eS eek eee ERE ER 100 ml 3 4 02 Unleaded Carburebol ERA E EE ER E a i ee edo Diaphragm All Position RED PTT s o besten net ieee ae Dan be Auto Rewind MUNI Sob XR ER ERE E rad ET ROW WAT CRETAE EFE mew NE RES Baffled with Guard TArOt TP Manual Spring Return Fuel Tank Capaclby ki ot AREK OG EEK tad 561 ml 19 oz DRIVE SHAFT and CUTTING HEAD Drive Sha TOUS TO cts sony ex ROC S CREDERE Qo ORC ease wen Kee S acre ue x greet cd t at EN Aluminum Throttle Control a scis td RV a oks ER shane iden C58 das SEGA RU CER nA RE RE RR Pe ER Finger Tip Trigger Unit Weight No Fuel with D handle Cutting attachment shield and Cutting attachment 11 Ibs 4 9 kg Cutting MechaniSM vere P SERCE Dual Strin
21. ll ventilated area Wipe up any spilled fuel immediately If fuel has been spilled avoid creating a source of ignition or starting the engine until fuel vapors have dissipated Ensure correct fuel is used Never operate the unit without the fuel cap securely in place Move the unit at least 9 1 meters 30 ft from the fueling point before starting the engine Do not smoke Keep sparks and open flames away from the area while adding fuel or operating the unit WHILE OPERATING Wear safety glasses or goggles and ear hearing protection at all times when operating this unit Always wear a face or dust mask if the operation is dusty SL 2 33 J d 0 0 RULES FOR SAFE OPERATION Wear heavy long pants boots and gloves Do not wear loose clothing jewelry short pants sandals or go barefoot Secure hair above shoulder level The string guard must be in place at all times while operating the unit Failure to use the string guard may cause the clutch to overheat DO NOT OPERATE UNIT WITHOUT THE GUARD IN PLACE Before each use check that the cutting head is in good condition and correctly installed that the trigger returns automatically to the idle position Before starting adjust the handle to your size and make sure that the cutting head is not in contact with anything Use the unit only in daylight or good artificial light Operate this unit only in a well ventilated area outdoors Carbon monoxide exhau
22. ng a new gasket Torque the screw to 2 2 3 4 N m 20 30 in lb NOTE You can purchase a rocker arm cover gasket from your local authorized dealer 12 Reinstall the engine cover Check alignment of the cover before tightening the screws Tighten screws 14 Check the spark plug and reinstall Refer to Replacing the Spark Plug 15 Replace the spark plug wire MAINTENANCE amp REPAIR INSTRUCTIONS REPLACING THE SPARK PLUG Use a Champion RDZ19H spark plug or equivalent The correct air gap is 0 635 mm 0 025 in Removethe plug after every 25 hours of operation and check its condition 1 Stop the engine and allow it to cool Grasp the plug wire firmly and pull it from the spark plug 2 Clean around the spark plug Remove the spark plug from the cylinder head by turning a 5 8 inch socket counterclockwise 3 Replace cracked fouled or dirty spark plug Set the air gap at 0 635 mm 0 025 in using a feeler gauge See Figure 32 CAUTION Do not sand blast scrape or clean electrodes Grit in the engine could damage the cylinder 4 Install a correctly gapped spark plug in the cylinder head Tighten by turning the 5 8 inch socket clockwise until snug If using a torque wrench torque to 12 3 13 5 Nem 110 120 in lb Do not over tighten 0 635 mm 0 025 in FIGURE 31 CLEANING WARNING To avoid serious personal injury always turn your trimmer off and allow it to co
23. o STOPPING INSTRUCTIONS ae a jdn m 1 Release your hand from the throttle control Allow temperatures below 40 F 4 C the engine to idle 2 stop the engine put the On Off Stop Control in NOTE If the engine does not start using the the STOP position See Figure 6 Engine Re start procedures revert to the Cold Start procedures OPERATING INSTRUCTIONS HOLDING THE TRIMMER WARNING Al ways wear eye hearing foot and body protection to reduce the risk of injury when operating this unit Before operating the unit stand in the operating position See Figure 9 Check for the following e The operator is wearing eye protection and proper clothing With a slightly bent right arm the operator s hand is holding the shaft grip The operator s left arm is straight and the hand is holding the D Handle Theunit is at waist level Thecutting head is parallel to the ground and easily contacts the vegetation without the need to bend over FIGURE 9 12 OPERATING INSTRUCTIONS ADJUSTING TRIMMING LINE LENGTH The Bump Head allows you to release trimming line without stopping the engine To release more line lightly tap the cutting head on the ground while operating the trimmer at high speed See Figure 10 FIGURE 10 NOTE Always keep the trimming line fully extended Line release becomes more difficult as cutting line becomes shorter Each time the head is bumped it
24. ol before you clean or perform any maintenance Use a small brush to clean off the outside of the unit Do not use strong detergents Household cleaners that contain aromatic oils such as pine and lemon and solvents such as kerosene can damage plastic housing or handle Wipe off any moisture with a soft cloth STORAGE Never store the unit with fuel in the tank where fumes may reach an open flame or spark Allow the engine to cool before storing Storetheunit locked up to prevent unauthorized use or damage Storetheunit in a dry well ventilated area Storetheunit out of the reach of children LONG TERM STORAGE If the unit will be stored for an extended time use the following storage procedure 1 Drain all petrol gasoline from the fuel tank into a container Do not use petrol that has been stored for more than 60 days Dispose of the old fuel in accordance to Federal State and Local regulations 2 Start the engine and allow it to run until it stalls This ensures that all fuel has been drained from the carburetor NOTE Remove the spark plug and drain all of the oil from the cylinder before attempting to start the trimmer after storage 3 Thoroughly clean the unit and inspect for any loose or damaged parts Repair or replace damaged parts and tighten loose screws nuts or bolts The unit is ready for storage TRANSPORTING Allow the engine to cool before transporting Securethe unit while trans
25. over Back of Engine FIGURE 28 6 Clean dirt from around the rocker arm cover Then remove the screw holding the rocker arm cover with a large flat blade screwdriver or Torx T25 bit Remove the rocker arm cover and gasket See Figure 29 Spark Plug Hole 7 Pull the starter rope slowly to bring the piston to the top of its travel known as top dead center Check that While looking in the spark plug hole the piston is at the top of its travel See Figure 29 Both rocker arms move freely and both valves are closed If not repeat this step 8 Slidethefeeler gauge between the rocker arm and the valve return spring Measure the clearance between the valve stem and rocker arm Measure both the intake and exhaust valves See Figure 30 The recommended clearance for both intake and exhaust is 076 0 152 mm 003 006 in Usea standard automotive 0 127 mm 005 in feeler gauge The feeler gauge should slide between the rocker arm and valve stem with a slight amount of resistance without binding See Figure 30 Adjusting Nut Rocker Arm 10 If the clearance is not within specification a Turn the adjusting nut using a 5 16 inch 8 mm wrench or nut driver See Figure 30 To increase clearance turn the adjusting nut counterclockwise To decrease clearance turn the adjusting nut clockwise b Recheck both clearances and adjust as necessary 11 Reinstall the rocker arm cover usi
26. porting Drain fuel from unit Tighten fuel cap before transporting TROUBLESHOOTING GUIDE ENGINE WILL NOT START CAUSE ACTION Ignition switch is in OFF STOP position Turn ignition switch to ON Empty fuel Tank usages Godd cenae Ries Fill fuel tank with proper fuel Primer bulb wasn t pressed enough Press primer bulb fully and slowly 5 7 times Engine flooded EX RIEN de E Use starting procedure WITHOUT USING CHOKE Old or improper fuel Drain fuel tank and add fresh fuel Fouled spark PUG uices Se hice ee Ec a RU ER RU Replace or clean the spark plug ENGINE WILL NOT IDLE CAUSE ACTION Air filter is plugged Replace or clean the air filter Old or improper fuel css csse Drain fuel tank and add fresh fuel Carburetor adjusted poorly Adjust carburetor idle ENGINE WILL NOT ACCELERATE CAUSE ACTION Old or improper fuel ass su css arr Drain fuel tank and add fresh fuel Cutting head bound with grass Stop the engine and clean the cutting head ENGINE LACKS POWER OR STALLS WHEN CUTTING CAUSE ACTION Dirty air filter 2s2 2 tinct geek Exe EPEEEDOUPRRER Clean or replace the air filter Old or improper fuel Drain fuel tank and add fresh fuel Cutting head bound with grass Stop the engine and clean the cutting head Muffler or spark arrestor plugged
27. r Filter Cover tight around the spark arrestor screen See Figure 23 Air Filter A ume Spark 7 Slo FIGURE 23 FIGURE 20 3 Remove the spark arrestor screen from the muffler 4 Clean the spark arrestor screen with a wire brush or replace it 5 Reinstall the spark arrestor screen clip muffler cover and screws FIGURE 21 17 MAINTENANCE REPAIR INSTRUCTIONS CHECKING THE OIL LEVEL CAUTION To prevent extensive engine wear and damage to the unit always maintain the proper oil level in the crankcase Never operate the unit with the oil level below the bottom of the dipstick The importance of checking and maintaining the proper oil level in the crankcase cannot be overemphasized Check oil before each use l Stop engine and allow oil to drain into the crankcase 2 To get a proper oil level reading place the unit on a flat level surface 3 Keep dirt grass clippings and other debris out of the engine Clean the area around the oil fill plug dipstick before removing it 4 Removethe oil fill plug dipstick and wipe off oil Reinsert it all the way back in 5 Remove the oil fill plug dipstick and check the oil level The oil should reach the top of the dipstick See Figure 24 Add 1 4 1 5 Oz 41 44 ml Top of Dipstick CHANGING THE OIL For a new engine change the oil after the first 10 hours of operation Change the oil while the
28. r filter Page 17 Page 18 Page 18 Page 17 Page 19 Page 19 Page 21 LINE INSTALLATION This section covers both membrane line and standard single line installation Always use manufacturer s 0 095 inch 2 41 mm replacement line Line other than the specified may cause the engine to overheat or fail WARNING To prevent serious personal injury never use metal reinforced line wire or rope These can break off and become dangerous projectiles There are two ways to replace the trimming line Wind the inner reel with new line Install a prewound inner reel MAINTENANCE amp REPAIR INSTRUCTIONS Winding the Inner Reel With New Line NOTE Always use the correct line length when 1 Holdthe outer spool with one hand and unscrew installing trimming line on the unit The line the Bump Knob clockwise Inspect the bolt inside may not release properly if it is too long the Bump Knob to make sure it moves freely For Use with For Use with Membrane Replace the Bump Knob if damaged Single Line ONLY Line or Single Line 2 a is inner reel from the outer spool See noszy Slotted VOO pe KA FA o LI NG WARE EN J DO M Saar FIGURE 14 Single Line Installation Go To Step 8 for Membrane Line Installation SX 6 Take approximately 40 feet 12 2 m of new Bump Knob trimming line and loop it into two equal lengths Insert each end of the line through one of the two UJ holes in the inner reel Pull t
29. releases about 25 4 mm 1 inch of trimming line A blade in the string guard cuts the line to the proper length if excess line is released For best results tap the Bump Head on bare ground or hard soil If you attempt to release line in tall grass the engine may overheat Always keep the trimming line fully extended Line release becomes more difficult as the cutting line becomes shorter NOTE Do not rest the Bump Head on the ground while the unit is running cutting blade assembly Excessive line length CAUTION Do not remove or alter the line will make the unit overheat This may lead to serious personal injury or damage to the unit Some line breakage will occur from Entanglement with foreign matter Normal line fatigue Attempting to cut thick stalky weeds e Forcing the line into objects such as walls or fence posts DECORATIVE TRIMMING Decorative trimming is accomplished by removing all vegetation around trees posts fences and more Use a 30 degree angle when trimming with this method See Figure 11 FIGURE 11 TIPS FOR BEST TRIMMING RESULTS 1 Thecorrect angle for the cutting head is parallel to the ground NOTE Do not rest the Bump Head on the ground 2 DO NOT FORCE THE UNIT Allow the very tip of the lineto do the cutting especially along walls Cutting with more than the tip will reduce cutting efficiency and may overload the engine 3 Grass over 200 mm 8 in should b
30. rred during shipping Any damaged or missing part must be replaced before using this product RULES FOR SAFE OPERATION The purpose of safety symbols is to attract your attention to possible dangers The safety symbols and their explanations deserve your careful attention and understanding The safety warnings do not by themselves eliminate any danger The instructions or warnings they give are not substitutes for proper accident prevention measures SAFETY ALERT SYM BOL Indicates danger warning or caution Special attention is required in order to avoid serious personal injury May be used in conjunction with other symbols or pictographs Advises you of information or instructions vital to the operation or maintenance of the equipment DANGER Failure to obey a safety warning will result in serious injury to yourself or to others Always follow the safety precautions to reduce the risk of fire and personal injury WARNING Failure to obey a safety warning can result in serious personal injury to yourself or to others Always follow the safety precautions to reduce the risk of fire and personal injury CAUTION Failure to obey a safety warning can result in serious personal injury to yourself or to others Always follow the safety precautions to reduce the risk of fire and personal injury IMPORTANT SAFETY INFORMATION SAFETY WARNINGS FOR PETROL TRIMMERS WARNING Petrol gasoline is highly flammable and its v
31. st fumes can be lethal in a confined area Avoid accidental starting Be in the starting position whenever pulling the starting rope The operator and unit must be in a stable position while starting as shown in Starting Stopping instructions Use the right tool Do not usethis unit for any job except for which it is intended Do not overreach Keep proper footing and balancing at all times Always hold the unit with both hands when operating Keep a firm grip on both the front and rear handles or grips This unit has a clutch The cutting head remains stationary when the engine is idling If it does not have the unit adjusted by an authorized service technician Keep hands face and feet away from all moving parts Do not attempt to touch or stop the string or cutting head when it is rotating Do not touch the muffler or cylinder These parts get extremely hot from operation and remain hot for a short time after the unit is turned off Keep all bystanders especially children and pets at least 15 meters 50 ft away from the unit during operation Do not operate the engine faster than the speed necessary to cut trim or edge Do not run the engine at high speed when not cutting Always stop the engine when cutting is delayed or when walking from one cutting location to another Do not operate unit without both trimming lines extended and the proper line installed Do not extend the trimming line beyond the lengt
32. tions 8 Installing the D Handle 8 Oil and Fuel Information 9 10 Starting Stopping Instructions 11 12 Operating Instructions 12 13 Holding the Trimmer 12 Adjusting the Trimming LineLength 13 Decorative Trimming 13 Tips for Best Trimming Results 13 Maintenance and Repair Instructions 14 21 Maintenance 14 Line Installation 14 Installing a Prewound Reel 16 Air Filter Maintenance 17 Spark Arrestor 17 Checking Changing the Oil 18 Carburetor Setting 0 0 cece eee 19 Rocker Arm Clearance 19 Replacing the Spark Plug 21 Cleaning and Storage 21 Long Term Storage 21 Transporting scrote ida Po PRA HR 21 Troubleshooting Chart 22 Specifications Back Cover CONTENTS OF CARTON This unit should consist of the following e BCR4 Trimmer e D Handle and Hardware e Cutting Attachment Shield e Operator s Manual e Product Registration Card Examine all parts to make certain that nothing is missing and no breakage has occu
33. u are in the starting position when pulling the starter rope as shown in Figure 9 To avoid serious injury the operator and unit must also be in a stable position while starting Cold Start First Start of the Day or Engine Ran Out of Fuel 1 Check oil level in crankcase Refer to Checking the Oil Level 2 Fill the fuel tank with fresh clean unleaded petrol gasoline 3 Putthe Start Stop Control in the START position See Figure 6 4 Place the choke lever in the FULL choke A H position See Figure 7 NOTE Slide the choke lever directly above the appropriate symbol on air filter cover decal 5 Fully press and release the primer bulb 5 to 7 times slowly until FUEL IS VISIBLE IN THE PRIMER BULB If you can t see fuel in the bulb press and release the bulb three 3 additional times or as many times as it takes before you can see fuel in it See Figure 7 6 Squeeze and hold the throttle control to the wide open full throttle position 7 With theunit in the starting position pull the starter rope briskly 5 times in the FULL choke A H position If the engine attempts to run before the fifth pull proceed to step 8 See Figure 8 8 Move choke lever to the PARTIAL B x position See Figure 7 NOTE Theengine will not run in the FULL choke position 9 Pull the starter 1 to 3 times until the engine starts Run for 15 30 seconds If the unit fails to start return to step 7 10 Mo
34. ve the choke lever to the RUN C 1 1 position and run at full throttle for 30 seconds WARNING Avoid accidental starting Make 11 Release the throttle control to the idle position and begin operation Start On Stop Off On Off Stop Control FIGURE 6 Partial Choke Run Position B Position C Primer Bulb Full Choke Position A Choke Lever FIGURE 8 NOTE engine does not start using these procedures repeat steps 5 through 11 using TWO 2 pulls in the FULL choke A H position STARTING STOPPING INSTRUCTIONS Engine Re Start Warm Engine With Fuel NOTE Four stroke engines like cars are able to 1 Put the On Off Stop Control in the START start in the idle position As an alternate position See Figure 6 method you may want to start your unit in the idle position when the unit is warm With 2 Move the choke lever to the PARTIAL x the On Off Stop Control in the START position 1006 v sition and the choke lever in the RUN C 3 Squeezethe throttle control to the wide open position pull the starter rope briskly full throttle position When the engine starts run at full throttle 4 With the unit in the starting position pull the for 30 seconds If the unit fails to start or starter rope briskly until the engine starts See dies revert to the Engine Re Start procedure Figure 8 for warm engines 5 When the engine starts move the choke lever t
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