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BC251
848JBZ93A1 (704)
G G
B B
OWNER’S MANUAL
BRUSHCUTTER
BC251
GB-1
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BC251 DECLARATION OF COMFORMITY The undersigned manufacturer ZENOAH CO., LTD. 1-9, Minamidai, Kawagoe, Saitama, Japan The products referred to are: CATEGORY : BRUSHCUTTER MAKE : ZENOAH CO., LTD. MODEL : BC251 SERIAL NUMBERS : 70100101 and up This declaration conform with DIRECTIVE 98/37/EC (use of harmonized standard ISO 11806) DIRECTIVE 89/336/EEC (use of harmonized standard EN 61000-6-1 & EN 55012 (CISPRI 2) ) DIRECTIVE 2000/14/EC conformity assessment procedure followed ANNEX V (use of harmon
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BC251 SAFETY FIRST Contents Instructions contained in warnings within this manual marked with a symbol concern critical points which must be taken into consideration to prevent possible serious bodily injury, and 1. Parts location .................................................. 3 for this reason you are requested to read all such instructions 2. Specifications ................................................. 4 G carefully and follow them without fail. 3. Warning labels on the machine .....
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15m (50ft) BC251 2. Specification Model BC251 Overall size (LxWxH) mm 1810 x 330 x 390 Dry weight kg 5.4 Engine Model Zenoah GT25N4 3 Displacement cm 25.4 Fuel Mixture (Gasoline 50 : Oil 1) (when using ZENOAH genuine oil) Carburetor Diaphragm type Ignition system Flywheel magneto (C.D.I.) Spark plug NGK BPMR7A Fuel tank capacity L 0.62 Starter Recoil starter Clutch Centrifugal type Reduction ratio 1.462 Cutting head rotating direction Counter-clockwise (Operator view) Specifications are subject
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BC251 5. For safe operation b. At night, at times of heavy fog, 1. Read this manual carefully until or at any other times when you completely understand and your field of vision might be follow all safety and operating limited and it would be diffi- instructions. cult to gain a clear view of the 2. Keep this manual handy so that G working area. you may refer to it later when- B c. During rain storms, during ever any questions arise. Also lightning storms, at times of note, if you have any ques
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BC251 5. For safe operation BEFORE STARTING onto the ground in a flat clear area THE ENGINE and hold it firmly in place so as to 1. The area within a perimeter of ensure that neither the cutting 15 m (50 ft) of the person using part nor the throttle come into the product should be considered contact with any obstacle when a hazardous area into which no the engine starts. one should enter. If necessary, yellow warning rope, warning WARNING signs should be placed around the perimeter of the ar
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BC251 5. For safe operation 6. Never touch the muffler, spark 6. Under no circumstances should plug, or other metallic parts of the you ever take apart the product engine while the engine is in op- or alter it in any way. Doing so eration or immediately after shut- might result in the product be- ting down the engine. Doing so coming damaged during opera- G could result in serious burns or tion or the product becoming un- B electrical shock. able to operate properly. HANDLING FUEL • IF SOMEON
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BC251 6. Set up INSTALLING HANDLE • Mount the handle to the shaft tube and clamp it at a location that is comfortable to you. (1) (1) About 28cm (11 inches) INSTALLING CUTTING ATTACHMENT GUARD • Attach the cutting attachiment guard with the bolts provided while inserting the spacer between the guard and the pipe. •Attach the guard skirt on the guard. INSTALLING CUTTING HEAD 1. Remove the plastic tube that is attached to the gear shaft. 2. Firmly screw the line head assembly onto the gear shaft b
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BC251 7. Fuel ■ FUEL 4. Pour in the rest of gasoline and agitate again for at least one minute. As some oils may be difficult to agitate depending on oil ingredients, sufficient agi- • Gasoline is very flammable. Avoid smoking or tation is necessary for the engine to last long. Be bringing any flame or sparks near fuel. Make sure careful that, if the agitation is insufficient, there is an G to stop the engine and allow it cool before refuel- increased danger of early piston seizing due to ab-
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BC251 8. Operation STARTING ENGINE WARNING WARNING • The product is equipped with a centrifugal clutch mechanism, so the cutting attachment begins to • The cutting head will start rotating upon the en- rotate as soon as the engine is started by putting gine starts. the throttle into the start position. When starting the engine, place the product onto the ground in a 1. Feed fuel into the fuel tank and tighten the cap se- flat clear area and hold it firmly in place so as to curely. ensure tha
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BC251 8. Operation ADJUSTING IDLING SPEED G B (1) (1) Idle adjusting screw 1. When the engine tends to stop frequently at idling mode, turn the adjusting screw clockwise. 2. When the cutting head keeps rotating after releasing the trigger, turn the adjusting screw counter-clockwise. NOTE •Warm up the engine before adjusting the idling speed. GB-11
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BC251 8. Operation CUTTING WORK (LINE HEAD USAGE) ADJUSTING THE LINE LENGTH •Your brush cutter is equipped with a semi- auto type WARNING nylon line head that allows the operator to advance the line without stopping the engine. When the line 1. Always wear eye protection such as safety becomes short, lightly tap the head on the ground goggles. Never lean over the rotating cutting head. while running the engine at full throttle. Rocks or other debris could be thrown into eyes • Each time the he
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BC251 9. Maintenance Maintenance, replacement, or repair of the emission control device and systems may be performed by any non-road engine repair establishment or individual. Every Every Every 25 50 100 Before System/components Procedure Note G hours hours hours use B after after after fuel leaks, fuel spillage wipe out ✔ fuel tank, air filter, fuel filter inspect/clean ✔✔ replace, if necessary see adjusting replace carburetor idle adjusting screw ✔ idling speed
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BC251 9. Maintenance 9. Maintenance WARNING IMPORTANT • Make sure that the engine has stopped and is cool • Note that using any spark plug other than those des- before performing any service to the machine. ignated may result in the engine failing to operate prop- Contact with moving cutting head or hot muffler erly or in the engine becoming overheated and dam- may result in a personal injury. aged. • To install the spark plug, first turn the plug until it is AIR FILTER finger tight, then tig
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BC251 9. Maintenance GEAR CASE IMPORTANT • The reduction gears are lubricated by multipurpose, lithium-based grease in the gear case. Supply new • If waste gets stuck and causes blockage around the grease every 25 hours of use or more often depend- intake air cooling vent or between the cylinder fins, it ing on the job condition. may cause the engine to overheat, and that in turn G • Remove the bolt of the grease nipple and the bolt may cause mechanical failure on the part of the B opposite si
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BC251 12. Troubleshooting guide Case 1. Starting failure CHECK PROBABLE CAUSES ACTION fuel tank → incorrect fuel → drain it and use correct fuel fuel filter → fuel filter is clogged → clean carburetor adjustment screw → out of normal range → adjust to normal range sparking (no spark) → spark plug is fouled/wet → clean/dry → plug gap is incorrect → correct (GAP: 0.6 ~ 0.7 mm) spark plug → disconnected → retighten Case 2. Engine starts but does not keep running/hard re-starting CHECK PROBABLE CAUS
