English I ltaliano I Spanish I@ I RECEIVED FER 1 4 2000 Brush Cutter Decespugliatore Desbrozadora Grass Trimmer Tagliabordi Cortabordes EM4250 EM4251 . . '. 9 EM4250 Important: Read this instruction manual carefully before putting the Brush CuHedGrass Trimmer into operation and strictly observe the safety regulations1 Preserve inslruclionmanual carefullyl Importante: Prima di meltere in funzione il decespugliatore/lagliabordi, leggere attentamenle il presente manuale; rispellare rigorosamenle le norme di sicureual Conservare it manuale delle islruzioni per I'usol Importante: Leer cuidadosamente este manual de inslrucciones antes de poner en marcha la mequina y observar estriclamenle las normas de segurldad. Conservar esle manual de inslruccionescon cuidado. .- Thank you very much for purchasing the MAKITA Brush Cuner/Grass trimmer. We are pleased to recommend to you the MAKITA Brush Cuner/Grass trimmer which is the result of a long development programme and many years of knowledge and experience. Please read this booklet which refers in detail lo the various points that will demonstrate its outstanding performance. This will assist you to obtain the best possible result from your MAKITA Brush CutlerlGrass trimmer. Page Table of Contents Symbols .................................................. Safety instructions Technical data ........................................ Designation ............................. Mounting of ........................................... Mounling of ........................ Mounting of Before start of operation .......................................... Correct handling of machine .... ..................................................... 1 2 7 8 11 Resharpeningthe cuHi Servicing inslruclions ......................................... You will nole the following symbols when reading the instructions manual. Read instruction Manual Wear eye and ear protection (for Grass trimmer only) Take Particular care and Anention Wear protective helmet, eye and ear protection (for Brush Cutter only) Do not use metal blades (for grass trimmer only) Forbidden Top permissible tool speed Keep distance Fuel (Gasoline) Flying object hazard Engine-Manualstart No Smoking Emergencystop No open flame First Aid Protective gloves must be worn Recycling Kickback I 0 Keep the area of operation clear of all persons and pets 1 OWTART OFFlSTOP 20 . . ,.: 3. .i !:. .:5. :I, , ! (i. :' ' E ;'. ?I : Start the Brush Cutter/Grass trimmer only in accordance with the instructions. Do not use any other methods for starting the engine1 -Use the Brush CuWGrass trimmer and the tools only for such applications as specified. -Only start the Brush CutterlGrass trimmer engine, aHer the entire assembly is done. Operation of the device Is only permitted after all the appropriate accessories are attached1 -Before starting make sure that the cutting tool has no contact with hard objects such as branches, stones etc. as the cutting tool will revolve when starting. -The engine is lo be switched off immediately in case of any engine problems. -Should the cutting tool hit stones or other hard objects, immediately switch off the engine and inspect the cutting tool. -Inspect the cutting tool at short regular intervals for damage (detection of hairline cracks by means of tapping-noise test). -Operate the Brush CuHer/Grass trimmer only with the shoulder strap attached which is to be suitably adjusted before putting the Brush CuttedGrass trimmer into operation. It is essential to adjust the shoulder strap according to the user's size to prevent fatigue occurring during use. Never hold the cutter with one hand during use. -During operation always hold the Brush CuttedGrasstrimmer with both hands. Always ensure a safe footing. -Operate the Brush Cutter/Grass trimmer in such a manner as to avoid inhalationof the exhaust gases. Never run the engine in enclosed rooms (risk of gas poisoning). Carbon monoxide Is an odorless gas. -Switch off the engine when resting and when leaving the Brush CuttdGrass trimmer unattended, and place it in a safe location to prevent danger to others or damage to the machine. -Never put the hot Brush CuHer/Grass trimmer onto dry grass or onto any combustible materials. -The cutting tool has to be equipped with it's appropriate guard. Never run the cutter without this guard1 -All protective installations and guards supplied with the machine must be used during operalion. -Never operate the engine with faulty exhaust muffler. -Shut off the engine during transport. -During transport over long distances the tool protection included with the equipment must always be used. -Ensure safe position of the Brush Cutter/Grass trimmer during car transportation to avoid fuel leakage. -When transporting the Brush Cutter/Grass trimmer, ensure that the fuel tank is completely empty. -When unloading the Brush Cutter/Grasstrimmer from the truck, never drop the Engine to the ground or this may severely damage the fuel tank. v e n c y , never drop or cast the Brush CuttedGrass trimmer to the ground or this may severely damage the Brush CutterlGrass . trimmer. -Remember to lift the entire equipment from the ground when moving the equipment. Dragging the fuel tank is highly dangerous and will cause damage and leakage of fuel, possibly causing fire. STOP --- Resting Refuelling Maintenance Tool Replacement n L 3 - - - * Transport Refuelling -Shut off the engine during refuelling, keep away from open flames and do not smoke. -Avoid skin contact with mineral oil products. Do not inhale fuel vapor. Always wear protective gloves during refuelling. Change and clean protective clothing at regular intervals. -Take care not to spill either fuel or oil in order to prevent soil contamination (environmental protection). Clean the Brush Cutter/Grass trimmer Immediately after fuel has been spilt. -Avoid any fuel contact with your clothing. Change your clothing instantly if fuel has been spilt on it (to prevent clothing catching fire). -Inspect the fuel cap at regular intervals making sure that it can be securely fastened and does not leak. -Carefully tighten the fuel tank cap. Change location to start the engine (at least 3 meters away from the place of refuelling). -Never refuel in closed rooms. Fuel vapors accumulate at ground lever (risk of explosions). -Only transport and store fuel in approved containers. Make sure the fuel stored is not accessible to children. 0 I Method of Operation -Only use the Brush cutter/Grass trimmer in good light and visibility. During the winter season beware of slippery or wet areas, ice and snow (risk of slipping). Always ensure a safe footing. -Never cut above walst height. -Never stand on a ladder and run the Brush culter/Grars trimmer. -Never climb up Into trees to perform cutting operation with the Brush cutter/ Grass trimmer. -Never work on unstable surfaces. -Remove sand, stones, nails etc. found within the working range. Foreign particles may damage the cutting tool and can cause dangerous kick-backs. -Before commencing cutting, the cutting tool must have reached full working speed. Kickback A , Caution: Kickback -When operating the brush cutter. uncontrolled kickback may occur. -This is particularly the case when attempting to cut within a blade segment between 12 and 2 o'clock. -Never apply the brush cutter within a segment between 12 and 2 o'clock. -Never apply this segment of the brush cutter blade to solids, such as bushes and trees, etc.. having a diameter in excess of 3 cm or the brush cutter will be deflected at great force with the risk of injuries. Diagrammatic i Kickback prevention To avold klckbacks, observe the followlng: -Operation within a blade segment between 12 and 2 o'clock presents positive hazards, especially when using metal cutting tools. -Cutting operations within a blade segment between 11 and 12 o'clock, and between 2 and 5 o'clock, must only be performed by trained and experienced operators, and then only at their own risk. Easy cutting with almost no kickback is possible within a blade segment between 8 and 11 o'clock. Diagrammatic flgure Cutting Tools Employ only the correct cutting tool for the job in hand. EM4250. EM4251 with cutter blade (Star Blade (4 teeth), Eddy Blade (8 teeth)), Nylon cutting head For cutting thick materials, such as weed, high grass, bushes, shrubs, underwood, thicket etc. (max. 2 cm dia. thickness). Perform this cutting work by swinging the brush cutter evenly in half-circles from right to left (similar to using a scylhe). 9 I Maintenance instructions -The condltion of the cutter, in particular of the cutting tool of the protective devices and also of the shoulder strap must be checked before commencing work. Particular attention is lo be paid to the cutting blades which must be correctly sharpened. -Turn off the engine and remove spark plug connector when replacing or sharpening cutting tools, and also when cleaning the cutter or cutting tool. 4 . . Never straighten or weld damaged cutting tools. -Operate the Brush cutter/Grass trimmer with as little noise and contamination as possible. In particular check the correct setting of the carburetor. -Clean the Brush cutler/Grass trimmer at regular intervals and check that all screws and nuts are well tightened. -Never service or store the Brush cutter/Grass trimmer in the vicinity of naked flames. -Always store the Brush cutter/Grass trimmer In locked rooms and with an emptied fuel tank. c Observe the relevant accident prevention instructions issued by the relevant trade associations and by the insurance companies. Do not perform any modifications on the Brush culler/Grass trimmer as this will endanger your safety. The performance of maintenance or repair work by the user is limited to those activities as described In the instruction manual. All other work is to be done by an Authorized Service Agent. Use only genuine spare parts and accessories released and supplied by MAKITA. Use of non-approved accessories and tools means increased risk of accidents. MAKlTA will not accept any liability for accidents or damage caused by the use of non-approved cutting tools and fixing devices of cutting tools, or accessories. First Aid In case of accident make sure that a first-aid box is available in the vicinity of the cutting operations. Immediately replace any item taken from the first aid box. 0 When asking for help, please give the following information: -Place of accident -What happened -Number of injured persons -Kind of injuries -Your name EU Conformity Declaration Packaging The MAKITA Brush cuRer/Grass trimmer will be delivered in DNO protective cardboard boxes to prevent transport damage. Cardboard is a basic raw material and is therefore consequently . . reusable or suitable for recycling (waste paper recycling). The undersigned, Yasuhiko Kanzakl, as authorized by MAKITA INTERNATIONALEUROPE LTD., Michigan Drive. Tongwell. Milton Keynes, Bucks MK15BJD, U.K., declare that the Makita Machines, Type : manufactured by Robin conforms to the basic safely and health requirements of the applicable EU guidelines: EU Machineguideline 98/37/EG EU EMC guideline89/336/EWG (modifiedby 91/263/EWG,92/31/ EWG and 93/68/EWG) The most important standards applied to properly meet the requirements of the above EU guidelines were: EN 11806, ClSPR 12, EN50082-1, DIN VDE0879TI. Milton Keynes, 18.9.99 For MAKITA INTERNATIONAL EUROPE LTD. 3Yasuhiko Kanzaki Managing Director 5 ! EM4251 EM4250 Loop handle U handle Model Dimensions : length x width x height (without cutting blade) 1760~330x265 mm Mass (without plastic guard and cutting blade) 176Ox6OOx405 5.2 kg 5.4 Volume (fuel tank) cm3 500 Volume (oil tank) cm3 80 Engine displacement cm3 Maximum engine performance I 24.5 kw 0.66 at 7000 min Engine speed at recommendedmaw. spindle speed min' 8500 Maximum spindle speed (corresponding) min" 6500 Maximum fuel co&umption kslh 330 Slkh 408 Idling speed min" 3000 Clutch engagement speed min" 3750 Carburetor type WALBRO WYL Ignition system type Solid stale ignition Spark plug type NGK CMR6A Electrode gap mm Maximum specific fuel consumption Right handle (Rear grip) Vibration per IS0 7916" Idling mls2 Racing or W.0.T m/s* 0.7 - 0.8 2.59 I 6.27 4.72 I 4.7 -~ mk2 3.26 3.83 mls2 7.24 7.56 Sound pressure level average to IS0 7917'' db(A) 87.7 87.7 Sound power level average to IS0 10884') db(A) 97.7 97.7 Left handle (Front grip) Idling Racing or W.0.T ' Fuel Engine Oil Gear ratio 6 :. EM4250 Brush Cutter ;B 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 20 21 24 25 d 7 DESIGNATION OF PARTS Fuel Tank Rewind Starter Air Cleaner 1-0Switch (onloffl Spark Plug Exhaust Muffler Clutch Case Rear Grip Hanger Handle Control Lever Control Cable Shaft Protector Gear CaselHead Case Handle Holder Cutter Blade Nylon Cutting Head Fuel Filler Cap Starter Knob Exhaust Pipe Oil Gauge c CAUTION: Before doing any work on the brush cutter, always stop the engine and pull the spark plug connector off the spark plug. Always wear protective gloves1 CAUTION: Start the brush cutter only after having assembled it completely. For machines with U Handle models -Insert the handle bar into the handle holder, making sure that the boss in the handle holder fits into the hole in the handle. -ARer the handle bar is in place, tighten the four bolls (M5 x 25). NOTE: Be sue the bolts are tight, but do not overtighten, -Fit the control cable (together with the earth cord) to the handle with two clips I (3). -Avoid any tendency of the control cable lo loop at the handle bar. For machines with Loop Handle -Fix a barrier to the leH side of the machine together with the handle for operator's protection. -Do not adjust position of the loop handle loo close to the control grip. Keep not less than 25cm distance between the handle and the grip. (a distance collar is provided for this purpose.) G6 4 9 , 8 To meet the applicable safety provisions, only the tool/ protector combinations as indicated in the table must be used. Be sure to use genuine MAKITA cutter blades EM 4250 Star Blade Protector for metal blades Protector for metal blades (Usebladdcord of protector cutter) for metal or nylon cutting head. -The cutter blade musl be well polished, free of cracks or breakage. I f the cutter blade hits against a stone during operation, stop the engine and check the blade immediately. -Polish or replace the cutter blade every three hours of operation. -If the nylon cutting head hits against a stone during operation, stop the engine end check the nylon cutting head immediately. CAUTION: The appropriate protector must always be installed, for your own safety and in order to comply with accident-prevention regulations. Operation of the equipment without the guard being in place Is not permitted. .. PART NO.6208501400 PART NO. 6258038000 PART NO. 625805000 EM 4251 Protector for cord cutter Nylon cutting head Protector for cord cutter PART NO. 6218014001 PART NO. 6218008003 (Use of protector for metal bladdcord cutter) For EM4250 -The outside diameter of the cutter blade must be 230mm (9-1/16'). Never use any blades surpassing 230mm (9-1/16") in outside diameter. PART NO. 6258047002 For EM4250, EM4251 -Install the clamp (3) on the shaft so that the projection of the clamp (3) is inserted into the opening between the gear case (1) and the shaft Secure the protector (4) with the installatlon bolts M6 x 30 (2) and screw M5 x 8 (5). Use of protector for metal blade / cord cutter. -In use of the metal blade, fasten the protector (4) to the clamp (3) with two bolts M6 x 30 (2). P -In use of the cord cutter, insert the protector (2) into the protector (I), and fasten them with two screw (4) and two nuts (3). 9 , Turn the machine upside down, and you can replace the cutter blade easily. For EM4250, EM4251 -Insert the hex wrench through lhe hole in the gear case and rotate the receiver washer (3)until it is locked with the hex wrench. -Loosen the nut (1) (lefl-handthread) with the socket wrench and remove the nut (l), and clamp washer (2). P For EM4250 with the hex wrench still in place. -Mount the cutter blade onto the shafl so that the guide of the receiver washer (3)fits in the arbor hole in the cutter blade. Install the clamp washer (2) and secure the cutter blade with the nut (1). (Tightening lorque: 13 - 23 N-m] NOTE: Always wear gloves when handling the cutter blade. NOTE: The cutter blade-fasteningnut (with spring washer) is a consumable part. I f there appears any wear or deformation on the spring washer, replace the nut. I Mounting of nylon cutting head - For EM4251 -To install the nylon cutting head (7). remove the tightening nut (8). -Insert the socket-headwrench (11) through the hole in the gear case and turn the support washer until it will be locked with its notch (12) (or the shaft will be locked). -Then screw Ihe nylon cutting head onto the shaft by turning it counterclockwise. -Remove the socket-head wrench. I I -Make sure that the blade is the left way up. Rotation 10 Inspection and Refill of Engine Oil -Perform the following procedure, with the engine cooled down. -While keeping the engine level, remove the oil gauge, and confirm that the oil is filled within the upper and lower limit marks. When the oil is in short in such a way that the oil gauge touches the oil only by its tip, in particular with the oil gauge remaining inserted in the crankcase without screwing-in (Fig. 1). refill new oil near the port (Fig. 2). -For reference, the oil refill time is about 10h ( I O times or 10 tanks of oil refill). -If the oil changes in color or mixes with dirt, replace it with new one. (For the interval and method of replacement, refer to P 17) Recommended oil: SAE IOW-30oil of API Classification, Class SF or higher (4-cycle engine for automobile) oil volume: Approx. 8Occ Polnt 1 In Replacement of Oil “011Gauge” -Remove dust or dirt near the oil refill port, and detach the oil gauge. -Keep the detached oil gauge free of sand or dust. Otherwise, any sand or dust adhering to the oil gauge may cause irregular oil circulation or wear on the engine parts, which will result in troubles. -As an example to keep the oil gauge clean, it is recommendedto insert the oil gauge on its knob side into the engine cover, as shown in F i g 3 If oil adheres around Fig.:! Fg.1 9 Fig3 I1 ,. I ./. ( 1 ) Keep the engine level, and detach the oil gauge. (2) Fill oil up to the edge of the oil refill port. (Refer lo Fig2 of the preceding page). Feed oil with the lubricant refill container. (3) Securely tighten the oil gauge. Insufficient tightening may cause oil leakage. L Polnt 2 In Replacement of 011: “If oll spllls out” -If oil spills out belween the fuel tank and engine main unit, the oil is sucked into through the cooling air intake port, which will contaminate the engine. Be sure lo wipe out spilt oil before start of operation. REFUELING Handllng of Fuel - . It is necessary l o handle fuel with utmost care. Fuel may contain substances similar to solvents. Refueling must be performed in a sufficien ventilated room or in the open air. Never inhale fuel vapor, and keep fuel away from you. if you touch fuel repeatedly or for a long time, the skin becomes dry, which may cause skin disease or allergy. If fuel enters into the eye, clean the eye with fresh water. If your eye remains still irritated, consult your doctor. Storage Period of Fuel Fuel should be used up within a period of 4 weeks, even if it is kept in a special container in a well-ventilated shade. If a special container is not used or if the container Is not covered, fuel may deteriorate in one day. Fuel The engine is a four-stroke engine. Be sure to use an automobile gasoline (regular gasoline or premium gasoline). Polnts for Fuel t -Never use a gasoline mixture which contains engine oil. Otherwise, it will cause excessive carbon accumulation or mechanical troubles. -Use of deterioratedoil will cause irregular Startup. Refueling WARNING: INFLAMMABLES STRICTLY PROHIBITED Gasollne used: Automobile gasoline (unleaded gasoline) -Loosen the tank cap a little so that there will be no difference In atmospheric pressure. -Detach the tank cap, and refuel, discharging air by tilting the fuel tank so that the refuel port will be oriented upward. (Never refill fuel full to the oil refill Port.) -Wipe well the periphery of the tank cap to prevent foreign matter from entering into the fuel tank. -After refueling, securely tighten the tank cap. 12 Fuel - Attachment of shoulder strap -Adjust the strap length so that the culter blade will be kept parallel with the ground. Detachment 1 For EM4251 -In an emergency, pull the release belt (1) strongly upward, and you can detach the machine from you. Be extremely careful lo maintain control of the machine at this time. Do not allow the machine to be deflected toward you or anyone in the work vicinity. WARNING: Failure to maintain complete control of the machine at all could result in serious bodily injury or DEATH. For EM4250 -In case of emergency, remove the emergency detachment lever (2) by pulling strongly with a finger. The machine sill detach from body. Be extremely careful to maintain control of the machine at this time. Do not allow the machine to be deflected toward you or anyone in the work vicinity. WARNING: Failure to maintain complete control of the machine at all could result in serious bodily Injury or DEATH. Observe the applicable accident prevention regulationsl START IN G Move at least 3m away from the place of refuelling. Place the brush cutter on a clean piece of ground taking care that the cuaing tool does not come into contact with the ground or any other objects. ACold start Thronle contrqdial 1) Set this machine on a flat space. 13 For machine w i t h U Handle or Loop Handle 1) Set the 1-0switch (1) to OPERATION. 2) Choke lever Close the choke lever. Choke opening: - Full closing in cold or when the engine is cold. - Full or half opening in restart just after stop of operation. Primer pump Continue to push the primer pump until fuel enters into the primer pump. (In general, fuel enters into the primer pump by 7 to 10 pushes.) If the primer pump is pushed excessively, an excess of gasoline returns to the fuel tank. Recoil starter - Pull the start knob gently until it is hard to pull (compression point). Then, return the start knob, and pull it strongly. - Never pull the rope to the full. Once the start knob is pulled, never release your hand immediately. Hold the start knob until it returns to its original point. Choke lever When the engine starts, open the choke lever. Open the choke lever progressively while checking the engine operation. Be sure to open the choke lever to the full in the end. In cold or when the engine is cooled down, never open the choke lever suddenly. Otherwise, the engine may stop. - Warm-up operation Cohtinue warm-up operation for 2 to 3 minutes. 9 Note: -If the starter handle is pulled repeatedly when the choke lever remains at "START" position, the engine will not start easily due to excessive fuel intake. -In case of excessive fuel intake. remove the spark plug and pull the starter handle slowly to remove excess fuel. Also, dry the electrode section of the spark plug. Caution during Operation: If the throttle lever is opened fully in a no-load operation, the engine rotation is increasedto 10,000min or more. Never operate the engine a higher speed than required and at an approximate speed of 6,000 8,500min I. - 14 B: Startup after warm-up operation 1) Push the primer pump repeatedly. 2) Keep the throttle lever at the Idling position. 3) Pull the recoil starter strongly. 4) If it is difficult l o start the engine, open the thronle by about I D . Pay enenlion to the cutter blade which may rotate. Attention In Operation When the engine is operated upside down, white smoke may come out from the muffler. STOPPING 1) Release the throttle lever (6) fully, and when the engine rpm has lowered, set the 1-0switch to STOP the engine will now stop. 2) Be aware that the cutting head may not stop immediately and allow it to slow down fully. I ADJUSTMENT O F LOW-SPEED ROTATION (IDLING) When it Is necessary lo adjust the low-speed rotation (idling), perform it by the carburetor adjusting screw. CHECKUP OF LOW-SPEEDROTATION -Set the low-speed rotation to 3000mln-'. If it is necessary to change the rotation speed, regulate the adjusting screw (illustratedon the lefl), with Phillips screwdriver. -Turn the adjusting screw to the right. and the engine rotation will increase. Turn the adjusting screw to the lefl. and the engine rotalion will drop. -The carburetor is generally adjusted before shipment. If it is necessary lo readjust it. please contact Authorized Service Agent. CAUTION: The cutting tools mentioned below must only be resharpenedby an authorized facility. Manual resharpening will result in imbalthe ances of the culling tool causing vibrations and damage IO equipment. -cutter blade (star blade (4 teeth), eddy blade (8 teeth)) An expert resharpening and balancing service is provided by Authorized Service Agents. NOTE: To increase the service life of the cutter blade (star blade, eddy blade) it may be turned over once, until both cutting edges have become blunt. I 15 I NYLON CUlTING HEAD Most effective cutting area The nylon cutting head is a dual string trimmer head capable of both automatic and bump i% feed mechanisms. The nylon cutting head will automatically feed out the proper length of nylon cord by the changes in centrifugal force caused by increasing or decreasing rpms. However, to cut soft grass more efficiently, bump the nylon cutting head against the ground to feed out extra cord as indicated under operation section. Operatlon -Increase the nylon cutting head speed to approx. 6,000min’. Low speed (under 4,800min-‘) is not suitable. the nylon cord will not feed out properly at low speed. -The most effective cutting area is shown by the shaded area. Full speed Idle speed If the nylon cord does not feed out automatically proceed as follows: 1. Release the throttle lever to run the engine idle and then squeeze the throttle lever fully. Repeat this procedure until the nylon cord feeds out to the proper length. 2. If the nylon cord is too short to feed out automatically with the above procedure, bump the knob of the nylon cutting head against the ground to feed out the nylon cord. 3. If the nylon cord does not feed out with procedure 2, rewindheplace the nylon cord by following the procedures described under ‘Replacing the nylon cord“. LKnob Repiaclng the ngon cord Y / -First, stop the engine. -Press on the housing latches inward to lift off the cover, then remove the spool. Latches Press I Press Spool -Hook the center of new nylon cord into the notch in the center of the spool, with one end of the cord extending about 80mm (3-1/8”) more than the other. Then wind both ends firmly around the spool in the direction of the head rotation (left-hand direction Indicated by LH and right-hand direction by RH on the side of the spool). I I I 80mm(3-1IS”) - ’-,I- 1 - ‘ :, For left hand rotati Spool I -Wind all but about 100mm (3-15/16”) of the cords, leaving the ends temporarily hooked through a notch on the side of the spool. I I I -Mount the spool In the housing so that the grooves and protrusions on the spool match up with those in the housing. Keep the side with letters on the spool visible on the top. Now, unhook the ends of the cord from their temporary position and feed the cords through the eyelets to come out of the housing. 16 I -Align the protrusion on the underside of the cover with the slots of the eyelets. Then push cover firmly Onto the housing to secure it. eaL 1 Cover Protrusion Slot of eyelet CAUTION: Before doing any work on the Brush cuHer/Grass trimmer, always stop the engine and pull the plug cap off the spark plug (see "checking the spark plug'). Always wear protective gloves1 To ensure a long service life and to avoid any damage to the equipment, the following servicing operations should be performed at regular intervals. Dally checkup and malntenance -Before operation, check the machine for loose screws or mlssing parts. Pay particular attention to the tightness of the cutter blade or nylon culling head. -Before operation, always check for clogging of the cooling air passage and the cylinder fins. Clean them if necessary. -Perform the following work daily after use: Clean the Brush cutler/Grass trimmer externally and inspect for damage. Clean the air filter. When working under extremely dusty conditions, clean the filter the severall times a day. Check the blade or the nylon cutting head for damage and make sure it is firmly mounted. Check that there is sufficient difference between idling and engagement speed lo ensure that the cutting tool is at a standstill while the engine is Idling (if necessary reduce idling speed). If under idling conditions the tool should still continue to run, consult your nearest Authorized Service Agent. -Check the functioning of the 1-0switch, the lock-off lever, the control lever, and the look button. -- . . '. REPLACEMENT OF ENGINE OIL Deterloratedengine oil will shorten the life of the sliding and rotating parts lo a great extent. Be sure lo check the period and quantity of replacement. ATTENTION : In general, the engine main unit and engine oil still remain hot just after the engine is stopped. In replacement of oil, confirm that the engine main unit and engine oibare sufficiently cooled down. Otherwise, there may remain a risk of scald. Interval of replacement : Initially, every 20 operating hours, and subsequently every 50 operating hours Recommended 011 : SAEIOW-30 oil of API ClassificationSF Class or higher (4-stroke engine oil for automobile) In replacement, perform the following procedure. 1) Confirm that the tank cap is tightened securely. 2) Detach the oil gauge. Keep the oil gauge free from dust or dirt. I Fyel tank cap I auge 17 _ I ' 3) Place waste or paper near the oil refill port. or paper 4) Detach the oil gauge, and drain oil, tilting the main unit toward the oil refill PO".. Drain oil in a container. 5) Keep the engine level, and feed new oil up to the edge of the oil refill port. In refill, use a lubricant refill container. 6) After refill, securely lighten the oil gauge. Insufficient tightening of the oil gauge will lead lo oil leakage. I POINTS ON OIL - Never discard replaced engine oil in garbage, earth or sewage ditch. Disposal of oil is regulated by law. In disposal, always follow the relevant laws and regulations. For any points remaining unknown, contact Authorized Sewice Agent. - Oil will deteriorate even when it is kept unused. Perform inspection and replacement at regular intervals (replace with new oil every 6 months). I Set the cut part to this position (top lefl) CLEANING OF AIR CLEANER A DANGER:lNFLAMMABLESSTRlCTLYPROHIBITED Interval of Cleaning and Inspection: Daily (every 10 operating hours) -Remove the air cleaner cover-fixing bolts. -Pull the cover lower side and detach the air cleaner cover. -Turn the choke lever l o the full close side, and keep the carburetor off from dust or dirt. -Detach the element, wash it with tepid water-diluted neutral detergent, and dry it up. Remount the element according to the lines indicated In Fig.4. -Use waste and wipe out oil adhering to the air cleaner cover and plate breather. -Immediately after cleaning is finished, attach the cleaner cover and tighten it with fixing bolts. (In remounting. first place the upper claw, and then the lower claw.) Plat Une(slash-lined) Fig.4 18 CHECKING THE SPARK PLUG -Only use the supplied universal wrench lo remove or to install the spark plug. -The gap belween the two electrodes of Ihe spark plug should be 0.7-0.8mm (0.028"-0.032"). If the gap is too wide or too narrow, adjust it. If the spark plug is clogged with carton or fouled, clean it thoroubhly or replace it. CAUTION: Never touch the spark plug connector while the engine is running (danger of hlgh voltage electric shock). 0.7mm-OBmm (0.028"-0.0327 SUPPLY OF GREASE TO GEAR CASE -supply grease (Shell Alvania 2 or equivalent) to the gear case through the grease hole every 30 hours. (Genuine MAKITA grease may be purchased from your MAKITA dealer.) CLEANING OF FUEL FILTER Fuel pipe WARNING: INFLAMMABLES STRICTLY PROHIBITED Interval of Cleaning and Inspection: Monthly (every 50 operating hours) Suction head In the fuel tank -The fuel filler (1) of the suction head is used to filler the fuel required by the carburetor. -A periodical visual inspection of the fuel filler is to be conducted. For that purpose open the tank cap, use a wire hook and pull out the suction head through the tank opening. Filters found to have hardened, been pollutedor clogged up are to be replaced. -Insufficient fuel supply can result in the admissible maximum speed being exceeded. It is therefore important to replace the fuel filter at least quarterly to ensure satisfactory fuel supply to the carburetor. REPLACEMENT OF FUEL PIPE CAUTION: INFLAMMABLES STRICTLY PROHIBITED Interval of Cleaning and Inspection: Daily (every 10 operating hours) Replacement: Annually (every,200 operating hours) . Replace the fuel plpe every year, regardless of operating frequency. Fuel leakage may lead to fire. Ifany leakage is detected during inspection, replace the oil pipe immediately. INSPECTION OF BOLTS, NUTS AND SCREWS -Retighten loose bolts, nuts, etc. -Check for fuel and oil leakage. -Replace damaged parts with new ones for safety operation. CLEANING O F PARTS -Keep the engine always clean. -Keep the cylinder fins free of dust or dirt. Dust or dirt adhering lo the fins will cause seizure. REPLACEMENT OF GASKETS AND PACKINGS In reassembling after the engine is dismounted, be sure lo replace the gaskets and packings with new ones. Any mainlenance of adjustment work that is not Included and described in this manual is only to be performed by Authorized Service Agents. 19 .. i -When the machine Is in storage for a long time, drain fuel from the fuel tank and carburetor, as follows: Drain all fuel from the fuel tank. Dispose of properly and In accordance with all local laws. -Remove the spark plug and a few drops of oil into the spark plug hole. Then, pull the starter gently, so that oil covers the engine inside and tighten the spark plug. -Clear dirt or dust from the cutter blade and outside of engine, wipe them with a oil-immersed cloth and keep the machine in a place as dry as possible. n ity Fault location -ault system 3bservation 3ause Engine not starting or with jiff iculty gnition system gnition spark O.K. 'ault in fuel supply or compression system, mechanical lefect '40 ignition spark STOP-switch operated. wiring fault or short circuit. spark plug or connector defective, ignition module faulty Fuel supply Fuel tank filled Incorrect choke position, carburetor defective, fuel supply line bent or blocked, fuel dirty. Compression No compression when oulled over Cylinder bottom gasket defective, crankshafl seals damaged, cylinder or piston rings defective or improper sealing of spark plug Mechanicalfault Starter not engaging Broken starter spring, broken parts inside of the engine Tank filled ignition spark existing Carburetor contaminated, have it cleaned Tank filled Incorrect idling adjustment, carburetor contaminated Warm start problems Engine starts but dies Fuel supply Fuel tank vent defective, fuel supply line interrupted, cable or STOP-switch faulty Insufficient performance Several systems may simultaneously be affected Engine idling poor Air filter contaminated.carburetor contaminated,muffler clogged, exhaust duct in the cylinder clogged i 20 Operating time Engine oil Eghtening Parts (bolt, nut) Fuel tank ', Throttle lever stop switch Cutting blade Low-speedrotation Air cleaner Ignition plug Cooling air duct Fuel pipe F a r - c a s e grease I Fuel filter Clearance between air intakc I Carburetor Perform initial replacement afler 20h operalion. *2 For the 200 operating hour inspection, request Authorized Service Agent or a machine shop. '1 3' Afler emptying the fuel tank, continue to run the engine and drain fuel in the carburetor. 21 I TROUBLESHOOTING Vir Before making a request for repairs, check a trouble for yourself. If any abnormality is found, control your machine according to the description of this manual. Never lamper or dismount any part contrary to the description. For repairs, contact Authorized Service Agent or local dealership. lietl Pro MI s!rf ant TaG Push 7 lo 10 times. Failure to operate primer pump 1 Feed fuel. Lack of fuel Clogged fuel filter Clean Deteriorated fuel Deteriorated fuel makes starting more difficult Replace with new one. (Recommended replacement: 1 month) Excessive suction of fuel Set throttle lever from medium speed to high speed, and pull starter handle until engine starts. Once engine starts, cutter blade starts rotating. Pay full attention to cutter blade. Engine does not start If engine will not start still, remove spark plug, make electrode dry, and reassemble them as they originally are. Then, start as specified. L Ne 1 Attach securelv Detached DIUO cao ~~ Contaminated spark plug Clean Abnormal clearance of sDark Dlua 1 Adjust clearance Other abnormality of spark plug Replace Abnormal carburetor Make request for inspection and maintenance. Starter rooe cannot be Dulled Make reauest for inspection and maintenance ~ Make request for inspection and maintenance Abnormal drive system I Perform warm-up operation Insufficient warm-up Choke lever is set to "CLOSE" although engine is warmed up Engine stops soon Engine speed does not increase Cioaoed fuel filter II Set to .CLOSE" Clean Contaminated or clogged air cleaner 1 Clean Abnormal carburetor I Make reauest for inspection and maintenance ~~ ~~ ~ Make request for inspection and maintenance Abnormal drive system Loosened cutler blade-tiphteninpnut Sutler blade does not rotate I Tighten securely Twigs caught by cutter blade or dispersionRemove foreign matter preventing cover Stop engine immediately I Make request for inspection and maintenance. Abnormal drive system ~~ Wain unit vibrates abnormally. 1 Loosened cutter blade-tiahteninanut ~ Stop engine immediately + :utter blade does not stop immediately. Stop engine immediately Engine does not s t r . Replace cutter blade Broken, bent or worn cutter blade Shifted convex part of cutter blade and cutler blade S U D D O ~fitlina ~ I Tiahten securely I Attach securely Abnormal drive system Make request for inspection and maintenance High idling rotation Adjust Detached throttle wire Attach securely Abnormal drive system Make request for inspection and maintenance Detached connector Attach securely ~~ Abnormal electric system Make request for inspection and maintenance. Run engine at idling. and set choke lever to CLOSE. When the engine does not start after warm-up operation: I f there is no abnormality found for the check items, open the throttle by about 113 and start the engine 22 '