SHINDAIWA OWNER’S/OPERATOR’S MANUAL DH235 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 hearing protection when operating this unit.
Introduction The Shindaiwa DH235 Hedge Trimmer has been designed and built to deliver superior performance and reliability without compromise to quality, comfort, or durability. Shindaiwa high performance engines represent the leading edge of air-cooled engine technology, delivering exceptionally high power at remarkable low displacement and weight.
Contents PAGE PAGE PAGE Introduction.........................................2 Emission Control................................6 Operation..........................................10 Attention Statements.......................... 2 Unit Description..................................6 Stopping the Engine......................... 10 General Safety Instructions................ 3 Mixing Fuel.........................................7 Maintenance and Adjustments.........
Operating Precautions ■■Never transport the hedge trim- mer or leave it unattended with the engine running. An engine that’s running could be accidently accelerated causing the blades to oscillate. ■■Make sure that the blade cover is in place when transporting or storing the hedge trimmer. ■■Always make sure that the cutter attachment and all handles and guards are properly installed and firmly tightened before operation. ■■Inspect for broken, missing or improperly installed parts or attachments.
Safety Equipment and Labels Blade Cover Protector ON-OFF Switch Throttle Interlock Caution Label IMPORTANT! Caution, Danger, Warning, and Operation Information Labels: Make sure all information labels are undamaged and readable. Immediately replace damaged or missing information labels. New labels are available from your local authorized Shindaiwa dealer. Figure 2 Specifications Model DH235 Engine Type 2-cycle, horizontal cylinder, air cooled Engine Bore x Stroke 32.2mm x 26mm (1.27 x 1.
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 (engine modification) and, if the second to last character of the Engine Family on the Emission Control Information label (sample below) is “C”, “K”, or “T”, the emission control system is EM and TWC (3-way catalyst). The fuel tank/fuel line emission control system is EVAP (evaporative emissions). Evaporative emissions for California models are only applicable to fuel tanks.
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 operation, including, but not limited to, improper clutch engagement. Alternative fuels may also cause premature deterioration of fuel lines, gaskets, carburetors and other engine components.
IMPORTANT! Spilled fuel is a leading cause of hydrocarbon emissions. Some states may require the use of automatic fuel shut-off containers to reduce fuel spillage. After use • DO NOT store a unit with fuel in its tank. Leaks can occur. Return unused fuel to an approved fuel storage container. Storage - Fuel storage laws vary by locality. Contact your local government for the laws affecting your area. As a precaution, store fuel in an approved, airtight container.
1. Move the ignition stop switch to the “I” or ON position. See Figure 4. Ignition ON Ignition Switch Figure 4 2. Prime the carburetor by repeatedly depressing the carburetor primer bulb until clear fuel can be seen flowing through the transparent primer bulb. IMPORTANT! The primer system only pushes fuel through the carburetor. Repeatedly pressing the primer bulb will not flood the engine with fuel. 3. (Cold engine only) Choke the engine by moving the choke lever backward to the “closed” position.
Operation WARNING! Moving parts can amputate fingers or cause severe injuries. Keep hands, clothing and loose objects away from all openings. Always stop engine, disconnect spark plug, and make sure all moving parts have come to a complete stop before removing obstructions, clearing debris, or servicing unit. WARNING! Engine exhaust IS HOT, and contains Carbon Monoxide (CO), a poison gas. Breathing CO can cause unconsciousness, serious injury, or death. Exhaust can cause serious burns.
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.
Assembly and Adjustments Throttle Cable Free Play If the unit does not return to idle speed or doesen't reach full rpm, the throttle lever free play may need to be adjusted as follows: Throttle Lever Free Play 1. Measure free play at the end of the throttle lever. Throttle lever free play should be approximately. See Figure 12. 2. If adjustment is necessary, remove the air cleaner cover by loosening the cleaner cover knob. 3.
10/15-Hour Maintenance Every 10 to 15 hours of operation: ■■Remove and clean the spark plug. Adjust the spark plug electrode gap to 0.6 mm (0.024 in). If the spark plug must be replaced, use only an NGK BPM8Y or equivalent spark plug of the correct heat range. See Figure 15. 0.6 mm (0.024 in) Clean the spark plug and check the gap at the electrode. CAUTION! Before removing the spark plug, clean the area around the plug to prevent dirt and debris from getting into the engine’s internal parts.
Blades Lubrication 1. Apply a few drops of oil the each bolt slots at the bottom of blades. Lubrication Bolt slots Figure 18 Sharpening blade 1. Slide blades to allow file clearance using slots on bottom of blades. Do not pry against cutting edges. 2. Follow the original shape and file each cutting edge carefully to avoid damage to adjacent teeth. (A) 10mm Radius (B):100°(aprox) (C):35° (D):45° 3. Lubricate blades.
50-Hour Maintenance Every 50 hours of operation (more often in dusty or extreme conditions) ■■Remove and clean the cylinder cover and clean grass and dirt from the cylinder fins. 1. Remove the 2 muffler cover screws and the muffler cover. Cover screw 2. Remove the 5 cylinder cover screws and the cylinder cover.See Figure 22. 3. Clean grass and dirt from the cylinder fins. Clean Debris Figure 22 ■■Use a wire hook to extract the fuel filter from inside the fuel tank. (Figure 23).
Spark Arrester Screen Maintenance If the engine becomes sluggish and low on power, check and clean the spark arrester screen. Muffler cover Muffler screws Muffler WARNING! Never operate the unit with a damaged or missing muffler or spark arrester! Operating with a missing or damaged spark arrester is a fire hazard and could also damage your hearing. 1. Remove the 2 muffler cover screws and the muffler cover. See Figure 24. 2.
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 disengage the cutters. A 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 (A) counterclockwise. 3. If a tachometer is available, adjust idle.
Troubleshooting Guide ENGINE DOES NOT START OR HARD TO START Possible Cause What To Check Vaporlock. Remedy Engine hot/heat soaked. Let cool completely and restart. Low fuel quality. Refill with fresh, clean unleaded gasoline with a pump octane of 89 or higher mixed with a 2 stroke engine oil that meets or exceeds ISO-L-EGD and/or JASO FD classified oils at 50:1 gasoline/oil ratio. ENGINE DOES NOT START What To Check Does the engine crank? Possible Cause NO Fluid in the crankcase.
Troubleshooting Guide (continued) LOW POWER OUTPUT What To Check Is the engine overheating? Engine is rough at all speeds. May also have black smoke and/or unburned fuel at the exhaust. Possible Cause Operator is overworking the unit. Use a lower throttle setting. Carburetor mixture is too lean. Consult with an authorized shindaiwa servicing dealer. Improper fuel ratio.
Troubleshooting Guide (continued) ADDITIONAL PROBLEMS Symptom Poor acceleration. Engine stops abruptly. Possible Cause Clogged air filter. Clean the air filter. Clogged fuel filter. Replace the fuel filter. Lean fuel/air mixture. Consult with an authorized shindaiwa servicing dealer. Idle speed set too low. Adjust idle. Check Specifications page for correct idle speed. Ignition switch turned off. Reset the switch and re-start. Fuel tank empty.
SHINDAIWA LIMITED WARRANTY STATEMENT FOR PRODUCT SOLD IN USA AND CANADA BEGINNING 01/01/2013 ECHO, INC’S RESPONSIBILITY ECHO Incorporated’s (ECHO, INC.) Limited Warranty, provides to the original purchaser that this Shindaiwa product is free from defects in material and workmanship. Under normal use and maintenance from date of purchase, ECHO, INC.
PURCHASED REPAIR PARTS AND ACCESSORIES • 90-day all applications ATTENTION ENGINE POWERED PRODUCT OWNERS This Shindaiwa engine powered product is a quality-engineered unit which has been manufactured to exact tolerances to provide superior performance. To help ensure the performance of the unit, it is required to use engine oil which meets the ISO-L-EGD Standard per ISO/CD 13738 and JASO M345/FD Standards.
NOTES 23
Servicing Information Parts/Serial Number Genuine Shindaiwa Parts and Assemblies for your Shindaiwa products are available only from an Authorized Shindaiwa Dealer. When you do need to buy parts always have the Model Number, Type and Serial Number of the unit with you. You can find these numbers on the engine. For future reference, write them in the space provided below. Model No. _____________ Type _________SN.
