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SHInDAIwA O wnER’S/OPERATOR'S MAnUAL
AHS254
ARTICULATED HEDGE TRIMMER
wARnInG!
Always wear eye and ear protection when operat-
ing this machine! To minimize the risk of injury to
yourself and others, read this manual and familiarize
yourself with its contents.
X7502872100
04/10
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Introduction IMPORTAnT! wARnInG! The Shindaiwa H4 series of hand-held The information contained in these power equipment is designed and built The engine exhaust from to deliver superior performance and reli- instructions describes units available at this product contains chemicals ability without compromise to quality, the time of publication. known to the State of California comfort, safety or durability. Shindaiwa to cause cancer, birth defects or engines represent the leading edg
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Keep bystanders at least Be aware of the danger of The blades / cutting attach- falling debris. 50 feet (15 meters) away ments are SHARP! Handle from the operating trimmer with care. to reduce the risk of being cut by the cutting blades or struck by falling objects or thrown debris. Safety An articulated hedge trimmer has the DAnGER! AR w nInG! potential to cause serious personal THE ARTICULATED Do not make unauthor- injury to the operator or bystanders HEDGE TRIMMER IS NOT INSULATED
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Safety (continued) WARNING! Hedge Clipper blades are very sharp. Touching them may lead to severe personal injury. Avoid touching blades whenever possible, and always wear gloves to protect hands CAUTIOn! ■ Do not make unauthorized modi- ■ Always stop the engine and allow fications to the articulated hedge it to cool before refueling. Avoid ■ Always maintain the articu- trimmer or its components. overfilling and wipe off any fuel lated hedge trimmer according that may have spilled. ■ Keep
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Operator Safety Always wear a hard hat This machine is designed ALWAYS clear your work area to reduce the risk of head for trimming hedges. Do of trash or hidden debris that injuries during operation of not use this machine for could be thrown back at you or this machine. other purposes. toward a bystander. Always wear eye and hearing protection. ALWAYS protect Shindaiwa recommends wearing a yourself from hazards face shield as additional face and eye such as thorny brush protecti
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Specifications Model AHS254 Engine Type 4-cycle, vertical cylinder, air cooled Engine Bore x Stroke 34 x 27 mm/1.3 x 1.1 in. Engine Displacement 24.5cc/1.5 cu. in. Unit Weight, Less Fuel 6.2 kg/13.6 lbs. Unit Dimensions (LxWxH) 1670 x 197 x 250 mm / 65.8 x 7.8 x 9.9 in. Fuel Tank Capacity 590 ml/20 .3 oz. Fuel/oil ratio 50:1 with *ISO-L-EGD or JASO FD class engine oil Carburetor Diaphragm type Ignition Fully electronic, program controlled Spark Plug NGK CMR5H Electrode Gap 0.6 mm/ .024 in. To
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Assembly Prior To Assembly IMPORTAnT! ■ This manual and tool kit for routine Before assembling, make sure you maintenance. The terms “left”, “left-hand”, and have all the components required for a “LH”; “right”, “right-hand”, and “RH”; ■ Cutter blade cover complete unit: “front” and “rear” refer to directions as Carefully inspect all components for ■ Unit assembly viewed by the operator during normal damage. operation. Handle This unit comes with the handle Socket-head Capscrews inst
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Assembly (continued) 1. Position the hedge trimmer on a flat, level surface. 2. With your right hand, grasp the outer IMPORTAnT! Latch release tube near the handle. With your left The latch lock provides an interlock to hand, grip the adjustment lever on help prevent inadvertent depression of the cutter assembly. the latch release. 3. With the index finger of your left 5. Release the latch lock and the latch hand, press the latch lock. With your release. Make sure the latch lock left
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Assembly (continued) Throttle lever free play The throttle lever free play should be approximately 4 - 6 mm. Make sure that the throttle lever oper- ates smoothly without binding. If it becomes necessary to adjust the lever free play, follow the procedures and illustrations that follow. 1. Loosen the air cleaner cover knob(s) and remove the air cleaner 4 - 6 mm Cable cover. Adjuster Throttle lever free play 2. Turn the cable adjuster in or out as required to obtain proper free play
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Handling Fuel DANGER Fuel is VERY flammable. Use extreme care when mixing, storing or handling or serious personal injury may result. • Use an approved fuel container. • DO NOT smoke near fuel. • DO NOT allow flames or sparks near fuel. • Fuel tanks/cans may be under pressure. Always loosen fuel caps slowly allowing pressure to equalize. • NEVER refuel a unit when the engine is HOT or RUNNING! • DO NOT fill fuel tanks indoors. ALWAYS fill fuel tanks outdoors over bare ground. • DO NOT ove
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Starting the Engine IMPORTAnT! Engine ignition is controlled by a two position switch mounted on the throttle housing labeled, “I” for ON or START and “O” for OFF or STOP. WARNING The attachment will operate immediately when the engine starts and could result in loss of control and possible serious injury. Keep movable parts of the attachment and away from objects that could become entangled or thrown. NOTE: The blade cover is used for transportation and storage. Remove blade cover before
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Hold IMPORTAnT! Close the unit choke firmly... The primer system only pushes fuel through the carburetor. Repeatedly pressing the primer bulb will not flood the engine with fuel. 4. Set the choke lever to the CLOSED position if engine is cold. 5. While holding the outer tube firmly with left hand. Use your other hand to slowly pull the recoil starter han- Make sure the ...and pull recoil attachment is clear starter handle dle until resistance is felt, then pull of obstructions! Set
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Starting the Engine (continued) Starting a flooded engine AR w nInG! Burn danger from hot engine! Allow engine to cool before removing cylinder cover. 1. Slide the ignition switch to the “I” (ON) position. 2. Open the choke, put the throttle lever in the full throttle position, then clear excess fuel from the combustion chamber by cranking the engine several times. 3. If the engine still fails to start or fire, refer to the troubleshooting flow chart at the end of this manual. Stopping the Eng
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Operation Before trimming: ■ Put on the strap, if so equipped. This machine is designed especially for trimming hedges. ■ Rest when you feel fatigued. ■ Wear suitable protective clothing and Never use this machine for any other equipment. See the Safty section for ■ Never stand directly underneath the information. purposes. Never try to cut stones, met- branch you are cutting. Be aware of als, plastics or any other hard objects. falling branches. Note that a branch ■ Choose the best workin
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Maintenance (continued) Fasteners Air Filter nOTE: Make sure nuts, bolts, and screws The H4 engine that powers your Using non-standard replacement (except carburetor adjusting screws) Shindaiwa model is a hybrid 4-stroke parts could invalidate your Shindaiwa are tight. engine. As a hybrid, the engine is lubri- warranty. cated by oil mixed with the gasoline Muffler and air from the carburetor that moves This unit must never be operated with through and around the internal parts of a fault
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Maintenance (continued) 10-Hour maintenance (more frequently in dusty conditions) 1. Remove the air filter cover by loosen- Loosen ing the cover screw(s) and lifting. fasteners 2. Remove and inspect the pre-filter. If the pre-filter is torn or otherwise damaged, replace it with a new one. Prefilter 3. Clean the pre-filter with soap and water. Let dry before reinstalling. 4. Inspect the air filter element. If the element is damaged or distorted, Filter element replace it with a new one. 5.
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Maintenance (continued) 50-hour maintenance Every 50 hours of operation; more frequently in dusty conditions: Remove and clean the cylinder cover and clean dirt and debris from the cyl- inder cooling fins. Hooked wire Remove and replace the fuel filter element. ■ Use a hooked wire to extract the fuel filter from inside the fuel tank. Inspect the fuel filter element. If it shows signs Fuel filter element of contamination, replace with a genu- Fuel filter maintenance ine Shindaiwa replacement
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Maintenance (continued) 135-Hour Maintenance ■ Replace the spark plug annually: Use ■ Combustion chamber should be only the type recommended in the decarbonized, and the valve clear- ”Specifications” section or an equiva- ance should be adjusted. It is highly lent resistor type spark plug of the recommended that this is done correct heat range. Set spark plug by a Shindaiwa-trained service electrode gap to 0.6 mm. technician. Valve Adjustment 1. Remove cylinder cover, rocker arm cover
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Maintenance (continued) Muffler and spark arrester maintenance If the engine becomes sluggish and low on power, check and clean the spark arrester screen. AR w nInG! Engine Cover Never operate the unit with a Engine damaged or missing muffler or Cover Screws spark arrester! Operating with a miss- ing or damaged spark arrester is a fire hazard and could also damage your hearing. 1. With a 3 mm hex wrench remove the Muffler 4 engine cover screws and the engine Muffler Gasket cover. 2. W
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Maintenance (continued) Adjusting Engine Idle The engine must return to idle speed Idle Speed Adjustment Idle whenever the throttle lever is released. 1. Place the unit on the ground, then Ajust- Idle speed is adjustable, and must be set start the engine, and then allow it to ment low enough to permit the engine clutch Screw idle 2-3 minutes until warm. to disengage the cutting attachment. 2. If the attachment moves when the engine is at idle, reduce the idle speed by turning the idle adju
