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SHINDAIWA OWNER’S/OPERATOR’S MANUAL
HT254 HEDGE TRIMMER
WARNING!
Minimize the risk of injury to yourself and others! Read this manual
and familiarize yourself with the contents. Always wear eye and hear-
ing protection when operating this unit.
X7502864200
06/10
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Introduction Attention Statements Read and follow this The Shindaiwa HT254 Hedge Trimmer operators manual. Failure to do so could has been designed and built to deliver DANGER! result in serious injury. superior performance and reliability A statement preceded by without compromise to quality, comfort, the triangular attention symbol and Wear eye and hearing or durability. protection at all times the word “DANGER” contains infor- Shindaiwa high performance engines during the operation of
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General Safety Instructions Work Safely Shindaiwa hedge trimmers operate at WORK SAFELY! very high speeds and can do serious damage or injury if they are misused Always wear close-fitting clothing. Gloves offer Never allow children to use or abused. Never allow a person without added protection and are strongly recommended. the unit. Avoid operating near Do not wear clothing or jewelry that could get bystanders. training or instruction to operate your unit! caught in machinery. WARNING!
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Operating Precautions WARNING! ■ Never transport the hedge trim- ■ When cutting a branch that is mer or leave it unattended with the ■ Never smoke or light fires near the under tension, be alert for spring- engine running. An engine that’s hedge trimmer. Keep the unit away back so that you will not be struck running could be accidently acceler- from excessive heat. Engine fuel is by the moving branch. ated causing the blades to oscillate. very flammable and fire could lead ■ If a cutter
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Safety Equipment and Labels Blade Cover Warning Label ON-OFF Switch Protector CAUTION READ AND WEAR EYE KEEPS HANDS THE BLADES FOLLOW THE AND HEARING CLEAR OF Throttle Interlock ARE SHARP! INSTRUCTIONS PROTECTION HANDLE WITH CUTTER IN THE AT ALL TIMES CARE. BLADES WHEN OPERATORS DURING STARING THE MANUAL. OPERATION. ENGINE. Caution Label IMPORTANT! Caution, Danger, Warning, and Operation Information Labels: Make sure all information labels are undamaged and readable.
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Emission Control (Exhaust & Evaporative) EPA 2010 and Later and/or C.A.R.B. TIER III The emission control system for the engine is EM/TWC (Engine Modification and 3-way Catalyst) and for the fuel tank the Control System is EVAP (Evaporative Emissions) or N (for nylon tank). Evaporative emis- sion may be applicable to California models only. An Emission Control Label is located on the unit. (This is an EXAMPLE ONLY; information on label varies by en- gine FAMILY). PRODUCT EMISSION DURABILITY
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Mixing Fuel WARNING! Alternative fuels, such as E15 (15% ethanol), E-85 (85% ethanol) or any fuels not meeting Shindaiwa requirements are NOT approved for use in Shindaiwa gasoline engines. Use of alternative fuels may cause performance problems, loss of power, overheating, fuel vapor lock, and unintended machine opera- tion, including, but not limited to, improper clutch engagement. Alternative fuels may also cause premature dete- rioration of fuel lines, gaskets, carburetors and other en
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Mixing Instructions Storage - Fuel storage laws vary by 1. Fill an approved fuel container with half of the required amount of locality. Contact your local govern- gasoline. ment for the laws affecting your area. 2. Add the proper amount of engine oil to gasoline. As a precaution, store fuel in an ap- 3. Close container and shake to mix oil with gasoline. proved, airtight container. Store in a 4. Add remaining gasoline, close fuel container, and remix. well-ventilated, unoccupied buil
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NOTE: The blade cover is used for transportation and storage. Remove blade cover before using the unit. 1. Move the ignition stop switch to the rear (towards the grip) to the “I” or ON position. See Figure 4. Ignition ON 2. Set the throttle trigger to the “fast idle” position by performing the following: Ignition Switch a. Depress and hold the throttle lock, then squeeze the throttle trigger. b. Depress and hold the fast idle button. c. Release the throttle trigger and throttle lock, then rele
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When the motor starts... 1. Open the choke by moving the choke lever backward WARNING! (toward the fuel tank). The cutting attachment will move when the engine ac- 2. If the engine does not continue to run, repeat the appropri- celerates! ate cranking procedures for a cold or warm engine.When the engine starts, clear excess fuel from the combustion If the engine does not start chamber by accelerating the engine several times with the throttle lever. ■ Repeat the appropriate starting procedu
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Maintenance and Adjustments IMPORTANT! Maintenance, replacement or repair of emission control devices and systems may be performed by any repair establishment or individual; however, warranty repairs must be performed by a dealer or service center authorized by Echo, Inc The use of parts that are not equivalent in performance and durability to authorized parts may impair the effectiveness of the emission control system and may have a bearing on the outcome of a warranty claim. Air Filter The
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Assembly and Adjustments Throttle Cable Free Play Throttle Trigger Free Play If the unit does not return to idle speed or doesen't reach full rpm, the throttle trigger free play may need to be adjusted as follows: 1. Measure free play at the end of the throttle trigger. Throttle trigger free play should be approximately 5-7 mm (0.2-0.275"). See Figure 14. 2. If adjustment is necessary, remove the air cleaner cover by loosening the two 5-7mm thumbscrews. Turn the cable adjustment fitting in
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10/15-Hour Maintenance Every 10 to 15 hours of operation: ■ Remove and clean the spark plug. Clean the spark plug Adjust the spark plug electrode gap and check the gap at 0.6 mm to 0.6 mm (0.24 in). If the spark plug the electrode. (0.24 in) must be replaced, use only an NGK CMR5H or equivalent resistor type spark plug of the correct heat range. See Figure 17. NOTE: The NGK CMR5H also meets the require- ments for electro magnetic compliance (EMC). Figure 17 CAUTION! Before removing the
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Gearcase Lubrication Every 20 Hours Grease fitting BOTTOM VIEW Gearcase Grease Fitting Figure 20 VIEWED FROM THE BOTTOM BOTTOM VIEW Top off gearcase grease level by using a lever-type grease gun to force 1–2 strokes of high quality lithium-based grease through the gearcase grease fitting Gearcase cover Every 100 Hours (or before long-term storage) Remove the gearcase cover, and use solvent and a soft brush to remove all old grease from the gearcase. To refill, hand- pack the gearcase wi
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135-Hour or Annual Maintenance ■ Combustion chamber should be decarbonized, and the valve clearance should be adjusted. It is highly recommended that this is done by a Shindaiwa-trained service technician. ■ Replace the spark plug annually: Use only NGK CMR5H or equivalent resistor type spark plug of the correct heat range. Set spark plug electrode gap to 0.6 mm (0.024 in). NOTE: The NGK CMR5H also meets the requirements for electro magnetic compliance (EMC). CAUTION! ■ Performing a valve adju
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Spark Arrester Screen Maintenance If the engine becomes sluggish and low Engine Cover on power, check and clean the spark ar- Screws rester screen. WARNING! Never operate the unit with a damaged or missing muffler or spark arrester! Operating with a missing or damaged spark arrester Cover is a fire hazard and could also dam- age your hearing. 1. With a 4 mm hex wrench remove the 3 engine cover screws and the Muffler engine cover. See Figure 26. Gasket 2. With a 4 mm hex wrench remov
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Adjusting Engine Idle The engine must return to idle speed whenever the throttle lever is released. Idle speed is adjustable, and must be set low enough to permit the engine clutch to Idle Adjustment disengage the cutters. Screw Idle Speed Adjustment 1. Start the engine, and then allow it to idle 2–3 minutes until warm. 2. If the cutters move when the engine is at idle, reduce idle speed by turning the idle adjustment screw counterclockwise. 3. If a tachometer is available, adjust idle. Che
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Troubleshooting Guide ENGINE DOES NOT START OR HARD TO START Remedy Possible Cause What To Check Let cool completely and restart. Engine hot/heat soaked. Vaporlock. Refi ll with fresh, clean unleaded gasoline with a pump octane Low fuel quality. of 89 or higher mixed with an air cooled engine oil that meets or exceeds ISO-L-EGD and/or JASO FD classifi ed oils at 50:1 gasoline/oil ratio. Valve adjustment. Consult with an authorized Shindaiwa Valve clearance too tight. servicing dealer. Adjust
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Troubleshooting Guide (continued) Troubleshooting Guide (continued) ADDITIONAL PROBLEMS LOW POWER OUTPUT Possible Cause Remedy Symptom Clogged air fi lter. Clean the air fi lter. What To Check Remedy Possible Cause Poor acceleration. Operator is overworking the unit. Use a lower throttle setting. Clogged fuel fi lter. Replace the fuel fi lter. Is the engine overheating? Carburetor mixture is too lean. Consult with an authorized Shindaiwa Lean fuel/air mixture. Consult with an authorized Shindaiw
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Troubleshooting Guide (continued) Troubleshooting Guide (continued) ADDITIONAL PROBLEMS LOW POWER OUTPUT Possible Cause Remedy Symptom Clogged air fi lter. Clean the air fi lter. What To Check Remedy Possible Cause Poor acceleration. Operator is overworking the unit. Use a lower throttle setting. Clogged fuel fi lter. Replace the fuel fi lter. Is the engine overheating? Carburetor mixture is too lean. Consult with an authorized Shindaiwa Lean fuel/air mixture. Consult with an authorized Shindaiw
