English I ltaliano I Spanish I@ I RECEIVED FER 1 4 2000 Brush Cutter Decespugliatore Desbrozadora Grass Trimmer Tagliabordi Cortabordes EM4250 EM4251 . . '.
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 ...............
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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.
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.
. . 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.
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.
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).
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.
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.
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).
( 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.
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.
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.
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.
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.
-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').
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.
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.
-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.
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.
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.
